Yokoyama Tetsuya 横山哲也

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YOKOYAMA Tetsuya 横山哲也

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Researcher Number	00467028
Other IDs
Affiliation (Current)	2025: 東京科学大学, 理学院, 教授
Affiliation (based on the past Project Information) *help	2016 – 2024: 東京工業大学, 理学院, 教授 2015 – 2016: 東京工業大学, 理学院, 准教授 2011 – 2016: 東京工業大学, 理工学研究科, 准教授 2015: 東京工業大学, 大学院理工学研究科, 准教授 2013: 東京工業大学, 大学院理工学研究科, 准教授 2009 – 2012: Tokyo Institute of Technology, 大学院・理工学研究科, 准教授
Review Section/Research Field	Principal Investigator Medium-sized Section 17:Earth and planetary science and related fields / Geochemistry/Cosmochemistry / Geochemistry/Astrochemistry / Science and Engineering Except Principal Investigator Geology / Science and Engineering / Basic Section 17040:Solid earth sciences-related / Petrology/Mineralogy/Economic geology / Medium-sized Section 17:Earth and planetary science and related fields / Basic Section 16010:Astronomy-related / Solid earth and planetary physics / Geochemistry/Astrochemistry
Keywords	Principal Investigator 隕石 / 同位体異常 / TIMS / 同位体分析 / CIコンドライト / はやぶさ2 / リュウグウ / 同位体 / プレソーラー粒子 / 高精度同位体分析 … More / 粒子運動解析 / 分子雲コア / CAI / CC隕石・NC隕石 / 隕石同位体二分性 / 理論研究 / 原始太陽系円盤 / 同位体二分性 / サンプルリターン / C型小惑星 / 微量元素 / 初期分析 / 微量元素存在度 / 同位体比 / 太古代火成岩 / 地球形成モデル / 親鉄元素 / レイトべニア / 水の起源 / レイトベニヤ / レイトベニア / モリブデン / 原子核合成 / 惑星形成論 / s-プロセス / r-プロセス / 小惑星帯 / 惑星形成 / 銀河化学進化 / U-Th核年代学 / r-process / U-Th核年代法 / 輸送モデリング / ダスト粒子 / ICP-MS / 重元素安定同位体異常 / 高精度同位体測定 / 安定同位体 / 原始太陽系星雲 / ICPMS / 母天体プロセス / 重元素 / 元素合成 / 始原的隕石 / 地球外物質化学 … More Except Principal Investigator マントル / 組成 / マグマ / 沈み込み帯 / 火山 / カムチャッカ / 物質循環 / 冥王代 / 原初大陸 / 沈み込み / 日本列島 / 同位体 / 鉱床 / 温泉 / 流体 / 地殻流体 / U-Th放射非平衡 / 噴火準備過程 / マグマ溜まり / 珪長質マグマ / カルデラ / 火山活動 / 島弧 / 沈み込み火成活動 / 日本 / 沈み込み帯火成活動 / ホットスポット / アフリカ / 南米 / 火成活動 / 海山 / プルーム / マントルプルーム / 希ガス同位体 / ハワイ諸島 / 捕獲岩 / ヘリウム同位体 / オスミウム同位体 / 強親鉄性元素 / かんらん岩 / 同位体異常 / 銀河化学力学進化 / 強磁場超新星 / 同位体分析 / 球状星団 / radial migration / 超新星（強磁場超新星、コラプサー） / 隕石同位体分析 / 超新星(強磁場超新星、コラプサー) / 矮小銀河 / 隕石同位体比分析 / 同位体比異常 / 隕石 / 重力崩壊型超新星 / ブラックホール / 中性子星合体 / r過程元素 / 原子炉間欠泉 / 酸化場と還元場 / 原始大気CO2 / 生命誕生の３ステップモデル / 自然原子炉間欠泉 / アノーソサイト / 生命誕生の3ステップモデル / 自然原子炉欠泉 / 原始大陸 / 冥王代表層環境 / 生命誕生場 / 原子大陸 / 冥王代表層環 / カメルーン / 対流 / 不均質構造 / 南太平洋 / 水 / 独立成分分析 / 統計解析 / 半球構造 / 最古生命探索 / 初期地球表層環境進化解読 / 初期マントル大規模分化 / 最古の生命の痕跡 / 最古の岩石 / 生命必須元素 / 初期地球表層環境進化 / 消滅核種同位体進化解読 / 初期太古代 / 初期地球 / 初期地球進化 / 固体地球進化 / ラブラドルネーン岩体 / アカスタ片麻岩体 / 消滅核種同位体 / 地球化学 / 岩石・鉱物・鉱床学 / 停滞スラブ / マントル遷移層 / 水循環 / 原始惑星系円盤 / 惑星系形成 / 組織 / 形状 / 成因 / コンドリュール / マントル対流 / 第二大陸 / 大陸地殻 / 第3大陸 / 構造侵食 / 大陸三層モデル / 第三大陸 / マントルダイナミクス / 構造浸食 / 花崗岩質大陸地殻 / 独立成分 / スラブ / 組成異常 / 不均質 / マントル化学 / 地殻 / 地下水 / 数値実験 / 放射非平衡 / 数値モデル / 地下水・温泉 / 熱水 / ダイナミクス / 移動 / 発生 / 数値シミュレーション / 鉱脈鉱床 / 有馬型塩水 / 火山岩 / スラブ流体 / 沈み込み帯変動 / サブダクション帯 / 弾性波速度 / 電気伝導度 / 塩水 / 地殻変動 / 地震 / 沈み込み変動 Less

Meteoritic and theoretical studies on the origin of isotopic dichotomy in meteoritesPrincipal Investigator
- Principal Investigator
  
  横山哲也
- Project Period (FY)
  2023 – 2026
- Research Category
  
  Grant-in-Aid for Scientific Research (A)
- Review Section
  
  Medium-sized Section 17:Earth and planetary science and related fields
- Research Institution
  Institute of Science Tokyo
Reactivation processes of felsic magma system after caldera forming eruption: constraints from U-Th disequilibrium analysis
- Principal Investigator
  
  栗谷豪
- Project Period (FY)
  2023 – 2025
- Research Category
  
  Grant-in-Aid for Scientific Research (B)
- Review Section
  
  Basic Section 17040:Solid earth sciences-related
- Research Institution
  Hokkaido University
Multi-isotopic analyses of the samples returned from Ryugu: Toward the comprehensive understanding of the origin and formation history of C-type asteroidsPrincipal Investigator
- Principal Investigator
  
  横山哲也
- Project Period (FY)
  2021 – 2025
- Research Category
  
  Fund for the Promotion of Joint International Research (Fostering Joint International Research (B))
- Review Section
  
  Medium-sized Section 17:Earth and planetary science and related fields
- Research Institution
  Tokyo Institute of Technology
Chemical and isotopic analyses of asteroid samples returned by Hayabusa2 missionPrincipal Investigator
- Principal Investigator
  
  横山哲也
- Project Period (FY)
  2020 – 2021
- Research Category
  
  Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
- Review Section
  
  Science and Engineering
- Research Institution
  Tokyo Institute of Technology
Construction of Earth formation model by isotopic analysis of siderophile elements in meteorites and Archean igneous rocksPrincipal Investigator
- Principal Investigator
  
  Yokoyama Tetsuya
- Project Period (FY)
  2019 – 2022
- Research Category
  
  Grant-in-Aid for Scientific Research (A)
- Review Section
  
  Medium-sized Section 17:Earth and planetary science and related fields
- Research Institution
  Tokyo Institute of Technology
Investigation of the plume source regions using mantle xenoliths
- Principal Investigator
  
  Ishikawa Akira
- Project Period (FY)
  2019 – 2021
- Research Category
  
  Grant-in-Aid for Scientific Research (B)
- Review Section
  
  Basic Section 17040:Solid earth sciences-related
- Research Institution
  Tokyo Institute of Technology
隕石の超高精度Mo同位体分析による地球の水の起源に関する研究Principal Investigator
- Principal Investigator
  
  横山哲也
- Project Period (FY)
  2018 – 2019
- Research Category
  
  Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
- Research Institution
  Tokyo Institute of Technology
Unraveling the origin and evolution of r-process elements based on the interpretation of elemental abundances measured for stars and meteorites
- Principal Investigator
  
  Tsujimoto Takuji
- Project Period (FY)
  2018 – 2022
- Research Category
  
  Grant-in-Aid for Scientific Research (B)
- Review Section
  
  Basic Section 16010:Astronomy-related
- Research Institution
  National Astronomical Observatory of Japan
Subducted seamounts and their influences on arc magmatism
- Principal Investigator
  
  Iwamori Hikaru
- Project Period (FY)
  2018 – 2021
- Research Category
  
  Grant-in-Aid for Scientific Research (A)
- Review Section
  
  Medium-sized Section 17:Earth and planetary science and related fields
- Research Institution
  The University of Tokyo
Decoding the origin of solar system from the isotope anomalies of heavy elements in meteoritesPrincipal Investigator
- Principal Investigator
  
  Yokoyama Tetsuya
- Project Period (FY)
  2016 – 2018
- Research Category
  
  Grant-in-Aid for Scientific Research (B)
- Research Field
  
  Geochemistry/Cosmochemistry
- Research Institution
  Tokyo Institute of Technology
Dating of presolar grains by nuclear cosmochronologyPrincipal Investigator
- Principal Investigator
  
  Yokoyama Tetsuya
- Project Period (FY)
  2015 – 2016
- Research Category
  
  Grant-in-Aid for Challenging Exploratory Research
- Research Field
  
  Geochemistry/Cosmochemistry
- Research Institution
  Tokyo Institute of Technology
冥王代の固体地球進化解読
- Principal Investigator
  
  KOMIYA Tsuyoshi
- Project Period (FY)
  2014
- Research Category
  
  Grant-in-Aid for Scientific Research (A)
- Research Field
  
  Geology
- Research Institution
  The University of Tokyo
Decoding of the early earth's evolution
- Principal Investigator
  
  KOMIYA Tsuyoshi
- Project Period (FY)
  2014 – 2018
- Research Category
  
  Grant-in-Aid for Scientific Research (S)
- Research Field
  
  Geology
- Research Institution
  The University of Tokyo
Characterization and genesis of mantle compositional hemispheres
- Principal Investigator
  
  Iwamori Hikaru
- Project Period (FY)
  2014 – 2016
- Research Category
  
  Grant-in-Aid for Scientific Research (A)
- Research Field
  
  Petrology/Mineralogy/Economic geology
- Research Institution
  Japan Agency for Marine-Earth Science and Technology
冥王代地球
- Principal Investigator
  
  丸山茂徳
- Project Period (FY)
  2014 – 2018
- Research Category
  
  Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
- Review Section
  
  Science and Engineering
- Research Institution
  Tokyo Institute of Technology
Water content of the mantle transition zone constrained by volcanic rocks
- Principal Investigator
  
  Kuritani Takeshi
- Project Period (FY)
  2013 – 2015
- Research Category
  
  Grant-in-Aid for Scientific Research (B)
- Research Field
  
  Petrology/Mineralogy/Economic geology
- Research Institution
  Hokkaido University
  Osaka City University
Study of Chondrule Formation Processes: An Approach Combining Theoretical Calculations and Measurements of Shape, Composition, and Texture of Chondrules
- Principal Investigator
  
  NAKAMOTO Taishi
- Project Period (FY)
  2012 – 2014
- Research Category
  
  Grant-in-Aid for Scientific Research (B)
- Research Field
  
  Solid earth and planetary physics
- Research Institution
  Tokyo Institute of Technology
Growth of the second continent and mantle dynamics: Insights from a history of continental growth and tectonic erosion
- Principal Investigator
  
  Maruyama Shigenori
- Project Period (FY)
  2011 – 2015
- Research Category
  
  Grant-in-Aid for Scientific Research (S)
- Research Field
  
  Geology
- Research Institution
  Tokyo Institute of Technology
Origin of heterogeneous isotope distribution for heavy elements in the early solar systemPrincipal Investigator
- Principal Investigator
  
  YOKOYAMA Tetsuya
- Project Period (FY)
  2011 – 2013
- Research Category
  
  Grant-in-Aid for Scientific Research (B)
- Research Field
  
  Geochemistry/Astrochemistry
- Research Institution
  Tokyo Institute of Technology
Heterogeneity of subduction zone mantle: Towards geochemical tomography
- Principal Investigator
  
  IWAMORI Hikaru
- Project Period (FY)
  2010 – 2012
- Research Category
  
  Grant-in-Aid for Scientific Research (A)
- Research Field
  
  Geochemistry/Astrochemistry
- Research Institution
  Tokyo Institute of Technology
Geofluid: Nature and dynamics of fluids in subduction zones
- Principal Investigator
  
  TAKAHASHI Eiichi
- Project Period (FY)
  2009 – 2013
- Research Category
  
  Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
- Review Section
  
  Science and Engineering
- Research Institution
  Tokyo Institute of Technology
Generation and migration dynamics of geofluids
- Principal Investigator
  
  IWAMORI Hikaru
- Project Period (FY)
  2009 – 2013
- Research Category
  
  Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
- Review Section
  
  Science and Engineering
- Research Institution
  Japan Agency for Marine-Earth Science and Technology
  Tokyo Institute of Technology
High precision isotope analyses of presolar grains for the study of stellar nucleosynthesisPrincipal Investigator
- Principal Investigator
  
  YOKOYAMA Tetsuya
- Project Period (FY)
  2009 – 2010
- Research Category
  
  Grant-in-Aid for Young Scientists (B)
- Research Field
  
  Geochemistry/Astrochemistry
- Research Institution
  Tokyo Institute of Technology

[Book] 地球と宇宙の化学事典（項目：元素合成モデル・白金属元素・同位体存在度・表面電離型質量分析計）2012
- Author(s)
  横山哲也
- Total Pages
  500
- Publisher
  朝倉書店
- Data Source
  KAKENHI-ORGANIZER-21109001
[Book] 地球と宇宙の化学事典2012
- Author(s)
  横山哲也
- Total Pages
  500
- Publisher
  朝倉書店
- Data Source
  KAKENHI-PROJECT-23340171
[Journal Article] Pervasive aqueous alteration in the early Solar System revealed by potassium isotopic variations in Ryugu samples and carbonaceous chondrites2024
- Author(s)
  Hu Yan、et al.
- Journal Title
  
  Icarus
  
  Volume: 409 Pages: 115884-115884
- DOI
  10.1016/j.icarus.2023.115884
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-22K18280, KAKENHI-PROJECT-21K18659, KAKENHI-PROJECT-22K21344, KAKENHI-PROJECT-21KK0058, KAKENHI-PROJECT-23KK0066, KAKENHI-PROJECT-19K03910, KAKENHI-PLANNED-20H05846, KAKENHI-PROJECT-19H00725, KAKENHI-PROJECT-22H00170, KAKENHI-PROJECT-23H00143, KAKENHI-PROJECT-20H01990, KAKENHI-PROJECT-20H01994, KAKENHI-PROJECT-23K25922
[Journal Article] Applicability of quartz tube digestion for the determination of highly siderophile and volatile chalcophile element abundances with Os isotopic compositions using ICP-MS/MS and N-TIMS2024
- Author(s)
  Fujita Ryo、Nakano Shun、Yokoyama Tetsuya、Ishikawa Akira
- Journal Title
  
  GEOCHEMICAL JOURNAL
  
  Volume: 58 Issue: 1 Pages: 9-27
- DOI
  10.2343/geochemj.GJ24002
- ISSN
  0016-7002, 1880-5973
- Language
  English
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-23KK0066, KAKENHI-PROJECT-19KK0091, KAKENHI-PROJECT-19H00711, KAKENHI-PROJECT-18H01258, KAKENHI-PROJECT-23K25965
[Journal Article] Water circulation in Ryugu asteroid affected the distribution of nucleosynthetic isotope anomalies in returned sample2023
- Author(s)
  Yokoyama Tetsuya、et al.
- Journal Title
  
  Science Advances
  
  Volume: 9 Issue: 45
- DOI
  10.1126/sciadv.adi7048
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-22K18280, KAKENHI-PROJECT-22K21344, KAKENHI-PROJECT-21KK0057, KAKENHI-PROJECT-21KK0058, KAKENHI-PROJECT-23KK0066, KAKENHI-PROJECT-18H01258, KAKENHI-PLANNED-20H05846, KAKENHI-PROJECT-21H04985, KAKENHI-PROJECT-19H00725, KAKENHI-PROJECT-22H00170, KAKENHI-PROJECT-23H00143, KAKENHI-PROJECT-20H01990, KAKENHI-PROJECT-20H01994, KAKENHI-PROJECT-23K25922
[Journal Article] The Magnesium Isotope Composition of Samples Returned from Asteroid Ryugu2023
- Author(s)
  Bizzarro Martin、et al.
- Journal Title
  
  The Astrophysical Journal Letters
  
  Volume: 958 Issue: 2 Pages: L25-L25
- DOI
  10.3847/2041-8213/ad09d9
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-22K18280, KAKENHI-PROJECT-21K18659, KAKENHI-PROJECT-22K21344, KAKENHI-PROJECT-21KK0057, KAKENHI-PROJECT-21KK0058, KAKENHI-PROJECT-23KK0066, KAKENHI-PROJECT-19K03910, KAKENHI-PLANNED-20H05846, KAKENHI-PROJECT-21H04985, KAKENHI-PROJECT-22H00170, KAKENHI-PROJECT-23H00143, KAKENHI-PROJECT-20H01990, KAKENHI-PROJECT-20H01994, KAKENHI-PROJECT-23K25922
[Journal Article] Nucleosynthetic s-Process Depletion in Mo from Ryugu samples returned by Hayabusa22023
- Author(s)
  Nakanishi N., Yokoyama T., Ishikawa A., Walker R.J., Abe Y., Aleon J., ...Tachibana S., et al
- Journal Title
  
  Geochemical Perspectives Letters
  
  Volume: 28 Pages: 31-36
- DOI
  10.7185/geochemlet.2341
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-22K21344, KAKENHI-PROJECT-21KK0058, KAKENHI-PROJECT-23KK0066, KAKENHI-PLANNED-20H05846, KAKENHI-PROJECT-21H04985, KAKENHI-PROJECT-22H00170, KAKENHI-PROJECT-23H00143, KAKENHI-PROJECT-23K25922, KAKENHI-PROJECT-23K25965
[Journal Article] Evaluation of the Residual Mass Fractionation in High‐Precision Cr Isotopic Analysis with TIMS2023
- Author(s)
  Yokoyama, T., Ohkuma, Y., Nishikawa, K., Sumiya, K., Gautam, I.
- Journal Title
  
  Geostandards and Geoanalytical Research
  
  Volume: ― Issue: 2 Pages: 415-435
- DOI
  10.1111/ggr.12479
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-21KK0058, KAKENHI-PROJECT-19H00715, KAKENHI-PROJECT-18H01258
[Journal Article] Neodymium‐142 deficits and samarium neutron stratigraphy of C‐type asteroid (162173) Ryugu2023
- Author(s)
  Torrano Zachary A.、et al.
- Journal Title
  
  Meteoritics & Planetary Science
  
  Volume: - Issue: 8 Pages: 1-17
- DOI
  10.1111/maps.14109
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-22K18280, KAKENHI-PROJECT-22K21344, KAKENHI-PROJECT-21KK0058, KAKENHI-PROJECT-23KK0066, KAKENHI-PLANNED-20H05846, KAKENHI-PROJECT-23H00143, KAKENHI-PROJECT-20H01990, KAKENHI-PROJECT-20H01994, KAKENHI-PROJECT-23K25922
[Journal Article] Analysis of Cation Composition in Dolomites on the Intact Particles Sampled from Asteroid Ryugu2023
- Author(s)
  Morita Mayu、et al.
- Journal Title
  
  Analytical Chemistry
  
  Volume: 96 Issue: 1 Pages: 170-178
- DOI
  10.1021/acs.analchem.3c03463
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-22K18280, KAKENHI-PROJECT-22K21344, KAKENHI-PROJECT-21KK0058, KAKENHI-PROJECT-23KK0066, KAKENHI-PLANNED-20H05846, KAKENHI-PROJECT-22H00170, KAKENHI-PROJECT-23H00143, KAKENHI-PROJECT-20H01994, KAKENHI-PROJECT-23K25922
[Journal Article] Samples returned from the asteroid Ryugu are similar to Ivuna-type carbonaceous meteorites2023
- Author(s)
  Yokoyama Tetsuya、Nagashima Kazuhide、Nakai Izumi、Young Edward D.、Abe Yoshinari、Aleon Jerome、Alexander Conel M. O’D.、Amari Sachiko、Amelin Yuri、Bajo Ken-ichi ... Yabuta Hikaru ... et al.
- Journal Title
  
  Science
  
  Volume: 379 Issue: 6634 Pages: 7850-7850
- DOI
  10.1126/science.abn7850
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19K03910, KAKENHI-PROJECT-21K03647, KAKENHI-PROJECT-22K18280, KAKENHI-PROJECT-21K18659, KAKENHI-PROJECT-22K18722, KAKENHI-PROJECT-18KK0128, KAKENHI-PROJECT-21KK0058, KAKENHI-PROJECT-21H04968, KAKENHI-PROJECT-19H00712, KAKENHI-PROJECT-19H00715, KAKENHI-PROJECT-19H00725, KAKENHI-PROJECT-20H00194, KAKENHI-PROJECT-20H00202, KAKENHI-PROJECT-22H00170, KAKENHI-PROJECT-19H01954, KAKENHI-PROJECT-20H01990, KAKENHI-PROJECT-20H02773, KAKENHI-PROJECT-20K14551, KAKENHI-PROJECT-19H00711, KAKENHI-PROJECT-19H01998, KAKENHI-WRAPUP-22H04900, KAKENHI-ORGANIZER-17H06454, KAKENHI-PLANNED-17H06459, KAKENHI-PLANNED-20H05846, KAKENHI-PROJECT-21H04985, KAKENHI-PUBLICLY-21H00159
[Journal Article] Strontium isotope evidence for the repeated formation of refractory inclusions in the Allende meteorite2023
- Author(s)
  Masuda, Y., Yokoyama, T.
- Journal Title
  
  Geochimica et Cosmochimica Acta
  
  Volume: 345 Pages: 50-61
- DOI
  10.1016/j.gca.2023.01.024
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-21KK0058, KAKENHI-PROJECT-19H00715, KAKENHI-PROJECT-18H01258
[Journal Article] Contribution of Ryugu-like material to Earth’s volatile inventory by Cu and Zn isotopic analysis2023
- Author(s)
  Paquet M. et al., including Iizuka T.
- Journal Title
  
  Nature Astronomy
  
  Volume: 7 Issue: 5 Pages: 182-189
- DOI
  10.1038/s41550-023-01938-6
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-22H00170, KAKENHI-PROJECT-19H00711, KAKENHI-PROJECT-19H01998
[Journal Article] Identification of carbonate-associated sulfate (CAS) in a Noachian Martian meteorite Allan Hills 840012023
- Author(s)
  Kajitani Iori、Koike Mizuho、Nakada Ryoichi、Tanabe Gaku、Usui Tomohiro、Matsu'ura Fumihiro、Fukushi Keisuke、Yokoyama Tetsuya
- Journal Title
  
  Earth and Planetary Science Letters
  
  Volume: 620 Pages: 118345-118345
- DOI
  10.1016/j.epsl.2023.118345
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-21KK0058, KAKENHI-PROJECT-21K18655, KAKENHI-PROJECT-21H04515, KAKENHI-PROJECT-22H00182, KAKENHI-PROJECT-23H00143, KAKENHI-PROJECT-21H01149, KAKENHI-PROJECT-23K22561
[Journal Article] Geochemical composition of dykes along the Cameroon Line (CL): Petrogenesis and similarities with the Central Atlantic Magmatic Province2022
- Author(s)
  Asaah Asobo Nkengmatia Elvis、Yokoyama Tetsuya、Iwamori Hikaru、Aka Festus Tongwa、Tamen Jules、Kuritani Takeshi、Usui Tomohiro、Hasegawa Takeshi、Fozing Eric Martial
- Journal Title
  
  Geochemistry
  
  Volume: - Issue: 2 Pages: 125865-125865
- DOI
  10.1016/j.chemer.2022.125865
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16KK0092, KAKENHI-PROJECT-19H00715, KAKENHI-PROJECT-23K20885
[Journal Article] Ryugu’s nucleosynthetic heritage from the outskirts of the Solar System2022
- Author(s)
  Hopp Timo、Dauphas Nicolas、Abe Yoshinari、Aleon Jerome、O’D. Alexander Conel M.、Amari Sachiko、Amelin Yuri、Bajo Ken-ichi、Bizzarro Martin、Bouvier Audrey ... Yabuta Hikaru ... et al.
- Journal Title
  
  Science Advances
  
  Volume: 8 Issue: 46 Pages: 1-10
- DOI
  10.1126/sciadv.add8141
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19K03910, KAKENHI-PROJECT-22K18280, KAKENHI-PROJECT-21K18659, KAKENHI-PROJECT-22K18722, KAKENHI-PROJECT-21KK0058, KAKENHI-PROJECT-21H04968, KAKENHI-PROJECT-21H04985, KAKENHI-PROJECT-19H00715, KAKENHI-PROJECT-22H00170, KAKENHI-PROJECT-19H01954, KAKENHI-PROJECT-20H01990, KAKENHI-PROJECT-20K14551, KAKENHI-PROJECT-19H00711, KAKENHI-PROJECT-18H01258, KAKENHI-PROJECT-19H01998, KAKENHI-PLANNED-17H06459, KAKENHI-PLANNED-20H05846
[Journal Article] Geochemical constraints on the formation of chondrules: Implication from Os and Fe isotopes and HSE abundances in metals from CR chondrites2022
- Author(s)
  Nakanishi Nao、Yokoyama Tetsuya、Okabayashi Satoki、Iwamori Hikaru、Hirata Takafumi
- Journal Title
  
  Geochimica et Cosmochimica Acta
  
  Volume: 319 Pages: 254-270
- DOI
  10.1016/j.gca.2021.11.009
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-19H00715, KAKENHI-PROJECT-21KK0058, KAKENHI-PROJECT-21H04511, KAKENHI-PROJECT-18H01258, KAKENHI-PUBLICLY-20H04609
[Journal Article] Chemical and Isotopic Evaluation of a Microsampling Method using Laser Ablation and Membrane Filter2022
- Author(s)
  Masuda Yuki、Yokoyama Tetsuya、Okabayashi Satoki、Ishikawa Akira、Iwamori Hikaru
- Journal Title
  
  Geostandards and Geoanalytical Research
  
  Volume: in press Issue: 2 Pages: 205-222
- DOI
  10.1111/ggr.12426
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-19H00715, KAKENHI-PROJECT-21KK0058, KAKENHI-PROJECT-18H01258, KAKENHI-PROJECT-19H01998, KAKENHI-PUBLICLY-20H04609
[Journal Article] Contribution of Ryugu-like material to Earth’s volatile inventory by Cu and Zn isotopic analysis2022
- Author(s)
  Paquet Marine、Moynier Frederic、Yokoyama Tetsuya、Dai Wei、Hu Yan、Abe Yoshinari、Aleon Jerome、O’D. Alexander Conel M.、Amari Sachiko、Amelin Yuri ... Yabuta Hikaru ... et al.
- Journal Title
  
  Nature Astronomy
  
  Volume: 7 Issue: 2 Pages: 182-189
- DOI
  10.1038/s41550-022-01846-1
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19K03910, KAKENHI-PROJECT-22K18280, KAKENHI-PROJECT-21K18659, KAKENHI-PROJECT-22K18722, KAKENHI-PROJECT-21KK0058, KAKENHI-PROJECT-21H04968, KAKENHI-PROJECT-19H00715, KAKENHI-PROJECT-20H00202, KAKENHI-PROJECT-19H01954, KAKENHI-PROJECT-20H02773, KAKENHI-PROJECT-20K14551, KAKENHI-PROJECT-18H01258, KAKENHI-PLANNED-17H06459, KAKENHI-PLANNED-20H05846, KAKENHI-PROJECT-21H04985
[Journal Article] The Solar System calcium isotopic composition inferred from Ryugu samples2022
- Author(s)
  Moynier F.、Dai W.、Yokoyama T.、Hu Y.、Paquet M.、Abe Y.、Aleon J.、Alexander C.M.O'D、Amari S.、Amelin Y. ... Yabuta H. ... et al.
- Journal Title
  
  Geochemical Perspectives Letters
  
  Volume: 24 Pages: 1-6
- DOI
  10.7185/geochemlet.2238
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19K03910, KAKENHI-PROJECT-22K18280, KAKENHI-PROJECT-21K18659, KAKENHI-PROJECT-22K18722, KAKENHI-PROJECT-21KK0058, KAKENHI-PROJECT-21H04968, KAKENHI-PROJECT-21H04985, KAKENHI-PROJECT-19H00715, KAKENHI-PROJECT-22H00170, KAKENHI-PROJECT-19H01954, KAKENHI-PROJECT-20H02773, KAKENHI-PROJECT-20K14551, KAKENHI-PROJECT-19H00711, KAKENHI-PROJECT-19H01998, KAKENHI-PLANNED-17H06459, KAKENHI-PLANNED-20H05846
[Journal Article] Survey of impact glasses in shergottites searching for Martian sulfate using X-ray absorption near-edge structure2021
- Author(s)
  Shidare Masashi、Nakada Ryoichi、Usui Tomohiro、Tobita Minato、Shimizu Kenji、Takahashi Yoshio、Yokoyama Tetsuya
- Journal Title
  
  Geochimica et Cosmochimica Acta
  
  Volume: 313 Pages: 85-98
- DOI
  10.1016/j.gca.2021.08.026
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PLANNED-17H06458, KAKENHI-PROJECT-19H00715, KAKENHI-PROJECT-19H01960, KAKENHI-PROJECT-19H02007, KAKENHI-PROJECT-19K21893, KAKENHI-PROJECT-21K18655, KAKENHI-PROJECT-21K18917, KAKENHI-PROJECT-20KK0080, KAKENHI-PROJECT-18H04134, KAKENHI-PROJECT-21H01149, KAKENHI-PROJECT-21H01184, KAKENHI-PLANNED-17H06459, KAKENHI-PUBLICLY-21H00162
[Journal Article] Variable refractory lithophile element compositions of planetary building blocks: Insights from components of enstatite chondrites2021
- Author(s)
  Yoshizaki Takashi、Ash Richard D.、Lipella Marc D.、Yokoyama Tetsuya、McDonough William F.
- Journal Title
  
  Geochimica et Cosmochimica Acta
  
  Volume: 308 Pages: 173-187
- DOI
  10.1016/j.gca.2021.05.057
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H00715, KAKENHI-PROJECT-18H01258
[Journal Article] High-μ signature in lavas of Mt. Oku: Implications for lithospheric and asthenospheric contributions to the magmatism of the Cameroon Volcanic Line (West Africa)2021
- Author(s)
  Asaah A.N.E.、Yokoyama T.、Iwamori H.、Aka F.T.、Kuritani T.、Usui T.、Tamen J.、Gountie Dedzo M.、Chako-Tchamabe B.、Hasegawa T.、Nche L.A.、Ohba T.
- Journal Title
  
  Lithos
  
  Volume: 400-401 Pages: 106416-106416
- DOI
  10.1016/j.lithos.2021.106416
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16KK0092, KAKENHI-PROJECT-19H00715, KAKENHI-PROJECT-20KK0080, KAKENHI-PLANNED-17H06459, KAKENHI-PROJECT-23K20885
[Journal Article] EXAFS Determination of Clay Minerals in Martian Meteorite Allan Hills 84001 and Its Implication for the Noachian Aqueous Environment2021
- Author(s)
  Nakada Ryoichi、Tanabe Gaku、Kajitani Iori、Usui Tomohiro、Shidare Masashi、Yokoyama Tetsuya
- Journal Title
  
  Minerals
  
  Volume: 11 Issue: 2 Pages: 176-176
- DOI
  10.3390/min11020176
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-20KK0080, KAKENHI-ORGANIZER-17H06454, KAKENHI-PLANNED-17H06458, KAKENHI-PLANNED-17H06459, KAKENHI-PUBLICLY-20H04609, KAKENHI-PROJECT-19H00715, KAKENHI-PROJECT-19H02007, KAKENHI-PROJECT-19H01960, KAKENHI-PROJECT-21H01149
[Journal Article] Nucleosynthesis: The Where and How2021
- Author(s)
  Yokoyama Tetsuya、Tsujimoto Takuji
- Journal Title
  
  Encyclopedia of Geology 2nd Edition
  
  Volume: 5 Pages: 1-19
- DOI
  10.1016/b978-0-08-102908-4.00121-1
- ISBN
  9780081029091
- Peer Reviewed
- Data Source
  KAKENHI-PUBLICLY-20H04609, KAKENHI-PROJECT-19H00715, KAKENHI-PROJECT-18H01258
[Journal Article] Simultaneous Determination of Insoluble Fluoride‐Forming and High Field‐Strength Element Abundances in Rock Samples by ICP‐QMS through Isotope Dilution‐Internal Standardisation2021
- Author(s)
  Kagami Saya、Yokoyama Tetsuya
- Journal Title
  
  Geostandards and Geoanalytical Research
  
  Volume: 45 Issue: 4 Pages: 679-699
- DOI
  10.1111/ggr.12394
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-19H00715
[Journal Article] Iron isotopic composition of very low-titanium basalt deduced from the iron isotopic signature in Luna 16, 20, and 24 soils2020
- Author(s)
  Okabayashi Satoki、Yokoyama Tetsuya、Hirata Takafumi、Terakado Kazuo、Galimov Erik M.
- Journal Title
  
  Geochimica et Cosmochimica Acta
  
  Volume: 269 Pages: 1-14
- DOI
  10.1016/j.gca.2019.10.020
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PUBLICLY-18H04457, KAKENHI-PROJECT-19H00715, KAKENHI-PROJECT-19H01998
[Journal Article] Magma plumbing system for the Millennium Eruption at Changbaishan volcano, China: Constraints from whole-rock U?Th disequilibrium2020
- Author(s)
  Kuritani Takeshi、Nakagawa Mitsuhiro、Nishimoto Jumpei、Yokoyama Tetsuya、Miyamoto Tsuyoshi
- Journal Title
  
  Lithos
  
  Volume: 366-367 Pages: 105564-105564
- DOI
  10.1016/j.lithos.2020.105564
- Peer Reviewed
- Data Source
  KAKENHI-PUBLICLY-20H04609, KAKENHI-PROJECT-19H00715, KAKENHI-PROJECT-19H01998, KAKENHI-PROJECT-20H02001, KAKENHI-PROJECT-20H02003
[Journal Article] Compositional heterogeneity of Archean mantle estimated from Sr and Nd isotopic systematics of basaltic rocks from North Pole, Australia, and the Isua supracrustal belt, Greenland2020
- Author(s)
  Nakamura Hitomi、Sano Ayane、Kagami Saya、Yokoyama Tetsuya、Ishikawa Akira、Komiya Tsuyoshi、Iwamori Hikaru
- Journal Title
  
  Precambrian Research
  
  Volume: 347 Pages: 105803-105803
- DOI
  10.1016/j.precamres.2020.105803
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19KK0091, KAKENHI-PUBLICLY-20H04609, KAKENHI-PROJECT-19H00715, KAKENHI-PROJECT-17KK0018, KAKENHI-PROJECT-20H05658, KAKENHI-PROJECT-18H03747, KAKENHI-PROJECT-19H01998
[Journal Article] A new concept for the genesis of felsic magma: the separation of slab-derived supercritical liquid2020
- Author(s)
  Taniuchi Hajime、Kuritani Takeshi、Yokoyama Tetsuya、Nakamura Eizo、Nakagawa Mitsuhiro
- Journal Title
  
  Scientific Reports
  
  Volume: 10 Issue: 1 Pages: 1-9
- DOI
  10.1038/s41598-020-65641-6
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PUBLICLY-20H04609, KAKENHI-PROJECT-19H00715, KAKENHI-PROJECT-19J11030, KAKENHI-PROJECT-20H02003
[Journal Article] Separation of Heavy Lanthanoids by Flash Column Chromatography for Precise Determination of Er and Yb Isotope Compositions in Rock Samples2020
- Author(s)
  Yokoyama Tetsuya、Fukai Ryota、Nakahara Masaki
- Journal Title
  
  Geostandards and Geoanalytical Research
  
  Volume: in press Issue: 2 Pages: 265-285
- DOI
  10.1111/ggr.12317
- Peer Reviewed
- Data Source
  KAKENHI-PUBLICLY-18H04457, KAKENHI-PROJECT-19H00715, KAKENHI-PROJECT-18H01258, KAKENHI-PROJECT-19H01998, KAKENHI-PROJECT-18J14186
[Journal Article] Problem of Iron Isotope Composition of the Earth and Moon. Data on δ57Fe of Luna 16, Luna 20, and Luna 24 Lunar Soil Samples (Report on the XXII Symposium on the Geochemistry of Stable Isotopes, Moscow, October 29?31, 2019)2020
- Author(s)
  Galimov E. M.、Okabayashi S.、Yokoyama T.、Hirata T.、Terakado K.
- Journal Title
  
  Geochemistry International
  
  Volume: 58 Issue: 11 Pages: 1193-1198
- DOI
  10.1134/s0016702920110063
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PUBLICLY-20H04609, KAKENHI-PROJECT-19H00715
[Journal Article] Geochemically heterogeneous Martian mantle inferred from Pb isotope systematics of depleted shergottites2020
- Author(s)
  Moriwaki Ryota、Usui Tomohiro、Tobita Minato、Yokoyama Tetsuya
- Journal Title
  
  Geochimica et Cosmochimica Acta
  
  Volume: 274 Pages: 157-171
- DOI
  10.1016/j.gca.2020.01.014
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PUBLICLY-18H04457, KAKENHI-PROJECT-19H00715, KAKENHI-PROJECT-19H01998, KAKENHI-PROJECT-15KK0153, KAKENHI-PROJECT-16H04073, KAKENHI-PROJECT-20KK0080, KAKENHI-ORGANIZER-17H06454, KAKENHI-PLANNED-17H06459, KAKENHI-PROJECT-19H01960
[Journal Article] Major/trace elements and Sr?Nd?Pb isotope systematics of lavas from lakes Barombi Mbo and Barombi Koto in the Kumba graben, Cameroon volcanic line: Constraints on petrogenesis2020
- Author(s)
  Asaah A.N.E.、Yokoyama T.、Aka F.T.、Iwamori H.、Kuritani T.、Usui T.、Gountie Dedzo M.、Tamen J.、Hasegawa T.、Fozing E.M.、Wirmvem M.J.、Nche A.L.
- Journal Title
  
  Journal of African Earth Sciences
  
  Volume: 161 Pages: 103675-103675
- DOI
  10.1016/j.jafrearsci.2019.103675
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PUBLICLY-18H04457, KAKENHI-PROJECT-19H00715, KAKENHI-PROJECT-19H01998, KAKENHI-PROJECT-16K01311, KAKENHI-ORGANIZER-17H06454, KAKENHI-PLANNED-17H06459, KAKENHI-PROJECT-19H01960
[Journal Article] Nucleosynthetic Sr-Nd isotope correlation in chondrites: Evidence for nebular thermal processing and dust transportation in the early Solar System2019
- Author(s)
  Fukai Ryota, Yokoyama Tetsuya
- Journal Title
  
  The Astrophysical Journal
  
  Volume: in press
- Peer Reviewed
- Data Source
  KAKENHI-PUBLICLY-18H04457
[Journal Article] Geochemistry and Sm-Nd chronology of a Stannern-group eucrite, Northwest Africa 71882019
- Author(s)
  Kagami, S., Haba, M. K., Yokoyama, T., Usui, T., Greenwood, R. C.
- Journal Title
  
  Meteoritics & Planetary Science
  
  Volume: 54 Issue: 11 Pages: 2710-2728
- DOI
  10.1111/maps.13382
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-ORGANIZER-17H06454, KAKENHI-PUBLICLY-18H04457, KAKENHI-PROJECT-19H00715, KAKENHI-PROJECT-19H01960, KAKENHI-PROJECT-19H01998, KAKENHI-PLANNED-17H06459
[Journal Article] Nucleosynthetic Sr?Nd Isotope Correlations in Chondrites: Evidence for Nebular Thermal Processing and Dust Transportation in the Early Solar System2019
- Author(s)
  Fukai Ryota、Yokoyama Tetsuya
- Journal Title
  
  The Astrophysical Journal
  
  Volume: 879 Issue: 2 Pages: 79-79
- DOI
  10.3847/1538-4357/ab0e0d
- Peer Reviewed
- Data Source
  KAKENHI-PLANNED-26106002
[Journal Article] Assessment of the secondary instrumental fractionation in TIMS: Implication for high-precision Nd isotope analysis of geological samples2019
- Author(s)
  Fukai Ryota、Yokoyama Tetsuya
- Journal Title
  
  GEOCHEMICAL JOURNAL
  
  Volume: 53 Issue: 5 Pages: 333-337
- DOI
  10.2343/geochemj.2.0569
- NAID
  130007724543
- ISSN
  0016-7002, 1880-5973
- Language
  English
- Peer Reviewed
- Data Source
  KAKENHI-PUBLICLY-18H04457, KAKENHI-PROJECT-19H00715, KAKENHI-PROJECT-19H01998, KAKENHI-PROJECT-18J14186
[Journal Article] Origin and Evolution of Distinct Molybdenum Isotopic Variabilities within Carbonaceous and Noncarbonaceous Reservoirs2019
- Author(s)
  Yokoyama Tetsuya、Nagai Yuichiro、Fukai Ryota、Hirata Takafumi
- Journal Title
  
  The Astrophysical Journal
  
  Volume: 883 Issue: 1 Pages: 62-62
- DOI
  10.3847/1538-4357/ab39e7
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PUBLICLY-18H04457, KAKENHI-PROJECT-19H00715, KAKENHI-PROJECT-18H01258, KAKENHI-PROJECT-19H01998, KAKENHI-PROJECT-18J14186
[Journal Article] Refinement of the micro-distillation technique for isotopic analysis with pg-level Os in geologic samples2019
- Author(s)
  Nakanishi, N., Yokoyama, T., Ishikawa, A.
- Journal Title
  
  Geostandards and Geoanalytical Research
  
  Volume: 印刷中
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-26220713
[Journal Article] Nucleosynthetic Sr-Nd isotope correlation in chondrites: Evidence for nebular thermal processing and dust transportation in the early Solar System2019
- Author(s)
  Fukai R.、 Yokoyama T.
- Journal Title
  
  The Astrophysical Journal
  
  Volume: in press
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-18H01258
[Journal Article] Fractionation of highly siderophile elements in metal grains from unequilibrated ordinary chondrites: Implications for the origin of chondritic metals2019
- Author(s)
  Okabayashi Satoki、Yokoyama Tetsuya、Nakanishi Nao、Iwamori Hikaru
- Journal Title
  
  Geochimica et Cosmochimica Acta
  
  Volume: 244 Pages: 197-215
- DOI
  10.1016/j.gca.2018.10.003
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PUBLICLY-18H04457, KAKENHI-PROJECT-26220713, KAKENHI-PROJECT-16H04081, KAKENHI-PLANNED-26106002, KAKENHI-PROJECT-18H03747
[Journal Article] Nucleosynthetic Sr-Nd isotope correlation in chondrites: Evidence for nebular thermal processing and dust transportation in the early Solar System2019
- Author(s)
  Fukai Ryota、Yokoyama Tetsuya
- Journal Title
  
  The Astrophysical Journal
  
  Volume: in press
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-16H04081
[Journal Article] Refinement of the Micro‐Distillation Technique for Isotopic Analysis of Geological Samples with pg‐Level Osmium Contents2019
- Author(s)
  Nakanishi Nao、Yokoyama Tetsuya、Ishikawa Akira
- Journal Title
  
  Geostandards and Geoanalytical Research
  
  Volume: in press Issue: 2 Pages: 231-243
- DOI
  10.1111/ggr.12262
- Peer Reviewed
- Data Source
  KAKENHI-PUBLICLY-18H04457, KAKENHI-PROJECT-15H02142, KAKENHI-PROJECT-16H04081, KAKENHI-PROJECT-18H03746, KAKENHI-PROJECT-19H00711, KAKENHI-PROJECT-19H00715, KAKENHI-PLANNED-26106002
[Journal Article] Nucleosynthetic Sr-Nd isotope correlation in chondrites: Evidence for nebular thermal processing and dust transportation in the early Solar System2019
- Author(s)
  Fukai, R., Yokoyama, T.
- Journal Title
  
  The Astrophysical Journal
  
  Volume: 印刷中
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-26220713
[Journal Article] The origin and evolution of nucleosynthetic Sr isotope variability in calcium and aluminum-rich refractory inclusions2018
- Author(s)
  Myojo, K., Yokoyama, T., Okabayashi, S., Wakaki, S., Sugiura, N., Iwamori, H.
- Journal Title
  
  The Astrophysical Journal
  
  Volume: 853 Pages: 48-56
- NAID
  130006198682
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-26220713
[Journal Article] The Origin and Evolution of Nucleosynthetic Sr Isotope Variability in Calcium and Aluminum-rich Refractory Inclusions2018
- Author(s)
  Kunihiro Myojo, Tetsuya Yokoyama, Satoki Okabayashi, Shigeyuki Wakaki, Naoji Sugiura, Hikaru Iwamori
- Journal Title
  
  ASTROPHYSICAL JOURNAL
  
  Volume: 853 Issue: 1 Pages: 48-48
- DOI
  10.3847/1538-4357/aa9f2e
- NAID
  130006198682
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16K05623, KAKENHI-PROJECT-17K18815, KAKENHI-PLANNED-26106002, KAKENHI-PROJECT-15H05771, KAKENHI-PROJECT-16H04081
[Journal Article] Changes of aliphatic C-H bonds in cyanobacteria during experimental thermal maturation in the presence or absence of silica as evaluated by FTIR microspectroscopy2018
- Author(s)
  Igisu Motoko、Yokoyama Tadashi、Ueno Yuichiro、Nakashima Satoru、Shimojima Mie、Ohta Hiroyuki、Maruyama Shigenori
- Journal Title
  
  Geobiology
  
  Volume: 16 Issue: 4 Pages: 412-428
- DOI
  10.1111/gbi.12294
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-17H01165, KAKENHI-PLANNED-26106002
[Journal Article] Re-Os isotope systematics and fractionation of siderophile elements in metal phases from CBa chondrites2018
- Author(s)
  Nakanishi Nao、Yokoyama Tetsuya、Okabayashi Satoki、Usui Tomohiro、Iwamori Hikaru
- Journal Title
  
  Meteoritics & Planetary Science
  
  Volume: 53 Issue: 5 Pages: 1051-1065
- DOI
  10.1111/maps.13050
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-15KK0153, KAKENHI-PLANNED-26106002, KAKENHI-PROJECT-15H05771, KAKENHI-PROJECT-16H04073, KAKENHI-PROJECT-16H04081, KAKENHI-PLANNED-17H06459
[Journal Article] Lead isotope systematics of the olivine-phyric shergottite Tissint: New geochemical signatures of the shergottite source mantle2017
- Author(s)
  Moriwaki, R., Usui, T., Simon, J.I., Jones, J.H., Yokoyama, T., Tobita, M.
- Journal Title
  
  Earth Planetary Science Letters
  
  Volume: 474 Pages: 180-189
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26220713
[Journal Article] New Constraints on the Shergottite Petrogenesis by Analysis of Pb Isotopic Compositional Space: Implication for Mantle Heterogeneity and Crustal Assimilation on Mars2017
- Author(s)
  Tobita, M., Usui, T. & Yokoyama, T.
- Journal Title
  
  Geochemical Journal
  
  Volume: 印刷中
- NAID
  130005317104
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-26220713
[Journal Article] Investigating the influence of nonspectral matrix effects for determination of 22 trace elements in rock samples by ICP-QMS.2017
- Author(s)
  Yokoyama, T., Nagai, Y., Hinohara, Y., and Mori, T.
- Journal Title
  
  Geostandards and Geoanalytical Research
  
  Volume: - Issue: 2 Pages: 221-242
- DOI
  10.1111/ggr.12147
- Peer Reviewed
- Data Source
  KAKENHI-PLANNED-26106002
[Journal Article] New constraints on shergottite petrogenesis from analysis of Pb isotopic compositional space: Implications for mantle heterogeneity and crustal assimilation on Mars2017
- Author(s)
  Tobita, M., Usui, T., and Yokoyama, T.
- Journal Title
  
  GEOCHEMICAL JOURNAL
  
  Volume: 51 Issue: 1 Pages: 81-94
- DOI
  10.2343/geochemj.2.0446
- NAID
  130005317104
- ISSN
  0016-7002, 1880-5973
- Language
  English
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PLANNED-26106002, KAKENHI-PROJECT-16H04073, KAKENHI-PROJECT-15KK0153, KAKENHI-PLANNED-17H06459
[Journal Article] Neodymium isotope heterogeneity of ordinary and carbonaceous chondrites and the origin of non-chondritic 142 Nd compositions in the Earth2017
- Author(s)
  Fukai Ryota、Yokoyama Tetsuya
- Journal Title
  
  Earth Planet. Sci. Lett.
  
  Volume: 474 Pages: 206-214
- DOI
  10.1016/j.epsl.2017.06.036
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PLANNED-26106002, KAKENHI-PROJECT-16H04081
[Journal Article] Precise isotope analysis for sub-nanogram lead by total evaporation thermal ionization mass spectrometry (TE-TIMS) coupled with 204Pb-207Pb double spike method.2017
- Author(s)
  Fukami, Y., Tobita, M., Yokoyama, T., Moriwaki, R., Usui, T.
- Journal Title
  
  Journal of Analytical Atomic Spectrometry
  
  Volume: 32 Issue: 4 Pages: 848-857
- DOI
  10.1039/c6ja00455e
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PLANNED-26106002, KAKENHI-PROJECT-15K13602, KAKENHI-PROJECT-15KK0153, KAKENHI-PROJECT-16H04073, KAKENHI-PLANNED-17H06459
[Journal Article] Chemical evolution of 244Pu in the solar vicinity and its implication for the properties of r-process production2017
- Author(s)
  Tsujimoto, T., Yokoyama, T. & Bekki, K.
- Journal Title
  
  The Astrophysical Journal Letters
  
  Volume: 印刷中
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-26220713
[Journal Article] Chemical evolution of 244Pu in the solar vicinity and its implication for the properties of r-process production.2017
- Author(s)
  Tsujimoto, T., Yokoyama, T. and Bekki, K.
- Journal Title
  
  Astrophys. J. Lett.
  
  Volume: 835 Issue: 1 Pages: L3-L3
- DOI
  10.3847/2041-8213/835/1/l3
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PLANNED-26106002, KAKENHI-PROJECT-15K13602, KAKENHI-PROJECT-15K05033
[Journal Article] Evaluation of long-term fluctuation in isotope ratios measured by TIMS with static, dynamic, and multistatic methods: A case study for Nd isotope measurements2017
- Author(s)
  Fukai, R., Yokoyama, T. & Kagami., S.
- Journal Title
  
  International Journal of Mass Spectrometry
  
  Volume: 印刷中
- Peer Reviewed / Acknowledgement Compliant
- Data Source
  KAKENHI-PROJECT-26220713
[Journal Article] Tellurium isotope compositions in acid leach fractions of carbonaceous chondrites2017
- Author(s)
  Fukami, Y. & Yokoyama, T.
- Journal Title
  
  Geochemical Journal
  
  Volume: 51 Pages: 17-29
- NAID
  130005317108
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-26220713
[Journal Article] Coupled Pb isotopic and trace element systematics of the Tissint meteorite: Geochemical signatures of the depleted shergottite source mantle2017
- Author(s)
  Moriwaki Ryota、Usui Tomohiro、Simon Justin I.、Jones John H.、Yokoyama Tetsuya、Tobita Minato
- Journal Title
  
  Earth and Planetary Science Letters
  
  Volume: 474 Pages: 180-189
- DOI
  10.1016/j.epsl.2017.06.044
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-15KK0153, KAKENHI-PLANNED-26106002, KAKENHI-PROJECT-16H04073, KAKENHI-PROJECT-16H04081, KAKENHI-PROJECT-17J09763, KAKENHI-PLANNED-17H06459
[Journal Article] Precise Isotope Analysis for Sub-nanogram Lead by Total Evaporation Thermal Ionization Mass Spectrometry (TE-TIMS) coupled with 204Pb-207Pb Double Spike method2017
- Author(s)
  Fukami, Y., Tobita, M., Yokoyama, T., Moriwaki, R. & Usui, T.
- Journal Title
  
  Journal of Analytical Atomic Spectrometry
  
  Volume: 印刷中
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-26220713
[Journal Article] Tellurium isotope compositions in acid leach fractions of carbonaceous chondrites2017
- Author(s)
  Fukami, Y. and Yokoyama, T.
- Journal Title
  
  GEOCHEMICAL JOURNAL
  
  Volume: 51 Issue: 1 Pages: 17-29
- DOI
  10.2343/geochemj.2.0443
- NAID
  130005317108
- ISSN
  0016-7002, 1880-5973
- Year and Date
  2017-01-31
- Language
  English
- Peer Reviewed
- Data Source
  KAKENHI-PLANNED-26106002, KAKENHI-PROJECT-16H04081
[Journal Article] Neodymium isotope heterogeneity for ordinary and carbonaceous chondrites and the origin of non-chondritic 142Nd composition of the Earth2017
- Author(s)
  Fukai, R., Yokoyama, T.
- Journal Title
  
  Earth Planetary Science Letters
  
  Volume: 474 Pages: 206-214
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-26220713
[Journal Article] Investigating the influence of nonspectral matrix effects for determination of 22 trace elements in rock samples by ICP-QMS2017
- Author(s)
  Yokoyama, T., Nagai, Y., Hinohara, Y. & Mori, T.
- Journal Title
  
  Geostandards and Geoanalytical Research
  
  Volume: 印刷中
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-26220713
[Journal Article] A prolonged granitoid formation in Saglek Block, Labrador: Zonal growth and crustal reworking of continental crust in the Eoarchean2017
- Author(s)
  Komiya, T., Yamamoto, S., Aoki, S., Koshida, K., Shimojo, M., Sawaki, Y., Aoki, K., Sakata, S., Yokoyama, T.D., Maki, K., Ishikawa, A., Hirata, T., Collerson, K.D.
- Journal Title
  
  Geoscience Frontiers
  
  Volume: 8 Pages: 355-385
- NAID
  130005612536
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26220713
[Journal Article] A prolonged granitoid formation in Saglek Block, Labrador: Zonal growth and crustal reworking of continental crust in the Eoarchean2017
- Author(s)
  Komiya Tsuyoshi、Yamamoto Shinji、Aoki Shogo、Koshida Keiko、Shimojo Masanori、Sawaki Yusuke、Aoki Kazumasa、Sakata Shuhei、Yokoyama Takaomi D.、Maki Kenshi、Ishikawa Akira、Hirata Takafumi、Collerson Kenneth D.
- Journal Title
  
  Geoscience Frontiers
  
  Volume: 8 Issue: 2 Pages: 355-385
- DOI
  10.1016/j.gsf.2016.06.013
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PLANNED-26106002, KAKENHI-PROJECT-15H02142, KAKENHI-PROJECT-17H04858, KAKENHI-PROJECT-16K13895, KAKENHI-PROJECT-16K13905
[Journal Article] Fluid-fluxed melting of mantle vs. decompression melting of hydrous mantle plume as the cause of intraplate magmatism over a stagnant slab: implications from Fukue Volcano Group, SW Japan2017
- Author(s)
  Kuritani, T., Sakuyama, T., Kamada, N., Yokoyama, T. & Nakagawa, M.
- Journal Title
  
  Lithos
  
  Volume: 印刷中
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-26220713
[Journal Article] Evaluation of the long-term fluctuation in isotope ratios measured by TIMS with static, dynamic, and multistatic methods: A case study for Nd isotope measurements.2016
- Author(s)
  Fukai, R., Yokoyama, T., Kagami., S
- Journal Title
  
  International Journal of Mass Spectrometry
  
  Volume: 414 Pages: 1-7
- DOI
  10.1016/j.ijms.2016.12.016
- Peer Reviewed
- Data Source
  KAKENHI-PLANNED-26106002, KAKENHI-PROJECT-16H04081
[Journal Article] Occurrence and geochronology of the Eoarchean, ~3.9 Ga, Iqaluk Gneiss in the Saglek Block, northern Labrador, Canada: Evidence for the oldest supracrustal rocks in the world2016
- Author(s)
  Shimojo, M., Yamamoto, S., Sakata, S., Yokoyama, T.D., Maki, K., Sawaki, Y., Ishikawa, A., Aoki, K., Aoki, S., Koshida, K., Tashiro, T., Hirata, T., Collerson, K.D. & Komiya, T.
- Journal Title
  
  Precambrian Research
  
  Volume: 278 Pages: 218-243
- Peer Reviewed / Acknowledgement Compliant / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26220713
[Journal Article] Chemical separation of Nd from geological samples for chronological studies using 146Sm-142Nd and 147Sm-143Nd systematics2016
- Author(s)
  Kagami, S. & Yokoyama, T.
- Journal Title
  
  Analytica Chimica Acta
  
  Volume: 937 Pages: 151-159
- Peer Reviewed / Acknowledgement Compliant
- Data Source
  KAKENHI-PROJECT-26220713
[Journal Article] Intensive hydration of the wedge mantle at the Kuril arc-NE Japan arc junction: implications from mafic lavas from Usu Volcano, northern Japan2016
- Author(s)
  Kuritani, T., Tanaka, M., Yokoyama, T., Nakagawa, M. & Matsumoto, A.
- Journal Title
  
  Journal of Petrology
  
  Volume: 57 Pages: 1223-1240
- NAID
  120006219893
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-26220713
[Journal Article] Chemical separation of Nd from geological samples for chronological studies using 146Sm-142Nd and 147Sm-143Nd systematics.2016
- Author(s)
  Kagami, S. and Yokoyama, T.
- Journal Title
  
  Analytica Chimica Acta
  
  Volume: 937 Pages: 151-159
- DOI
  10.1016/j.aca.2016.07.004
- Peer Reviewed / Acknowledgement Compliant / Open Access
- Data Source
  KAKENHI-PLANNED-26106002, KAKENHI-PROJECT-16H04081
[Journal Article] Nucleosynthetic isotope variation of siderophile and chalcophile elements in the Solar System2016
- Author(s)
  Yokoyama, T. & Walker, R.J.
- Journal Title
  
  Reviews in Mineralogy and Geochemistry
  
  Volume: 81 Pages: 107-160
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26220713
[Journal Article] Nucleosynthetic isotope variation of siderophile and chalcophile elements in the Solar System2016
- Author(s)
  Yokoyama, T., Walker, R.J.
- Journal Title
  
  Reviews in Mineralogy and Geochemistry
  
  Volume: 81 Issue: 1 Pages: 107-160
- DOI
  10.2138/rmg.2016.81.03
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-15K13602, KAKENHI-PROJECT-23224012, KAKENHI-PROJECT-25287144, KAKENHI-PLANNED-26106002
[Journal Article] Molybdenum isotope analysis by negative thermal ionization mass spectrometry (N-TIMS): Effects of oxygen isotopic compositions2016
- Author(s)
  Nagai, Y., Yokoyama, T.
- Journal Title
  
  Journal of Analytical Atomic Spectrometry
  
  Volume: 31 Issue: 4 Pages: 948-960
- DOI
  10.1039/c5ja00381d
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-15K13602, KAKENHI-PROJECT-23224012, KAKENHI-PLANNED-26106002
[Journal Article] Nucleosynthetic isotope variation of siderophile and chalcophile elements in the Solar System2016
- Author(s)
  Yokoyama, T. & Walker, R.J.
- Journal Title
  
  Reviews in Mineralogy and Geochemistry 81, Highly siderophile and strongly chalcophile elements in high temperature geochemistry and cosmochemistry
  
  Volume: 81 Pages: 107-160
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-26220713
[Journal Article] Molybdenum isotope analysis by negative thermal ionization mass spectrometry (N-TIMS): Effects of oxygen isotopic compositions2016
- Author(s)
  Nagai, Y. & Yokoyama, T.
- Journal Title
  
  Journal of Analytical Atomic Spectrometry
  
  Volume: 31 Pages: 948-960
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-26220713
[Journal Article] Geochemistry of lavas from maar-bearing volcanoes in the Oku Volcanic Group of the Cameroon Volcanic Line2015
- Author(s)
  A.N.E. Asaah, T. Yokoyama, F.T. Aka, T. Usui, T. Kuritani, M.J. Wirmvem, H. Iwamori, E.M. Fozing, J. Tamen, G.Z. Mofor, T. Ohba, G. Tanyileke, and J.V. Hell.
- Journal Title
  
  Chemical Geology
  
  Volume: 印刷中 Pages: 55-69
- DOI
  10.1016/j.chemgeo.2015.03.030
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23224012, KAKENHI-PLANNED-25120006, KAKENHI-PROJECT-25287144, KAKENHI-PROJECT-26247091
[Journal Article] Constraints for the Causes of Mass Extinction at the Triassic–Jurassic Boundary Based on High Precision Platinum Group Element Analyses2015
- Author(s)
  Fujisaki, W., Sawaki, Y., Yokoyama, T., Yamamoto, S., Maruyama, S
- Journal Title
  
  BUNSEKI KAGAKU
  
  Volume: 64 Issue: 5 Pages: 341-348
- DOI
  10.2116/bunsekikagaku.64.341
- NAID
  130005075455
- ISSN
  0525-1931
- Language
  Japanese
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-23224012, KAKENHI-PLANNED-26106002
[Journal Article] Nucleosynthetic strontium isotope anomalies in carbonaceous chondrites2015
- Author(s)
  Yokoyama, T., Fukami, Y., Okui, W., Ito, N. & Yamazaki, H.
- Journal Title
  
  Earth and Planetary Science Letters
  
  Volume: 416 Pages: 46-55
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26220713
[Journal Article] Nucleosynthetic strontium isotope anomalies in carbonaceous chondrite2015
- Author(s)
  Tetsuya Yokoyama, Yusuke Fukami, Wataru Okui, Nobuaki Ito, Hiroshi Yamazaki
- Journal Title
  
  Earth and Planetary Science Letters
  
  Volume: 416 Pages: 46-55
- DOI
  10.1016/j.epsl.2015.01.040
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-14J11125, KAKENHI-PROJECT-23224012, KAKENHI-PROJECT-25287144
[Journal Article] Evaluation of the applicability of acid leaching for the 238U-230Th internal isochron method2015
- Author(s)
  Tanaka, R., Yokoyama, T., Kitagawa, H., Tesfaye, D.B., and Nakamura, E.
- Journal Title
  
  Chemical Geology
  
  Volume: 396 Pages: 255-264
- DOI
  10.1016/j.chemgeo.2014.12.025
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23224012, KAKENHI-PROJECT-25287144
[Journal Article] A comparative review of petrogenetic processes beneath the Cameroon Volcanic Line: Geochemical constraints2014
- Author(s)
  Asaah, A.N.E, Yokoyama, T., Aka, F.T., Usui, T., Wirmvem, M.J., Tchambe, C.B., Ohba, T., Tanyileke, G., Hell, J.V.
- Journal Title
  
  Geoscience Frontiers
  
  Volume: in press
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23340171
[Journal Article] Chemical Separation of Mo and W from Terrestrial and Extraterrestrial Samples via Anion Exchange Chromatography2014
- Author(s)
  Nagai, Y., Yokoyama, T.
- Journal Title
  
  Analytical Chemistry
  
  Volume: 86 Pages: 4856-4863
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-26247083
[Journal Article] A comparative review of petrogenetic processes beneath the Cameroon Volcanic Line: Geochemical constraints2014
- Author(s)
  Asaah, A. N. E., Yokoyama, T., Aka, F., Usui, T., Wirmvem, M. J., Tchamabe, B. C., Ohba, T., Tanyileke, G., Hell, J. V.
- Journal Title
  
  Geoscience Frontier
  
  Volume: 5
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-26247083
[Journal Article] Feasibility studies of Sn isotope composition for provenancing ancient bronzes2014
- Author(s)
  Yamazaki, E.; Nakai, S.; Sahoo, Y.; Yokoyama, T.; Mifune, H.; Saito, T.; Chen, J.; Takagi, N.; Hokanishi, N.; Yasuda, A.
- Journal Title
  
  Journal of Archaeological Science
  
  Volume: 52 Pages: 458-467
- DOI
  10.1016/j.jas.2014.09.014
- NAID
  130005492214
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-23224012, KAKENHI-PROJECT-25287144, KAKENHI-PROJECT-25400524, KAKENHI-PROJECT-26400523
[Journal Article] A comparative review of petrogenetic processes beneath the Cameroon Volcanic Line: Geochemical constraints2014
- Author(s)
  Asaah, A. N. E., Yokoyama, T., Aka, F. T., Usui, T., Wirmvem, M. J., Tchamabe, B. C., Ohba, T., Tanyileke, G. and Hell J. V.
- Journal Title
  
  Geoscience Frontiers
  
  Volume: 6 Issue: 4 Pages: 557-570
- DOI
  10.1016/j.gsf.2014.04.012
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23224012
[Journal Article] Elemental transport upon hydration of basic schists during regional metamorphism: Geochemical evidence from the Sanbagawa metamorphic belt, Japan2014
- Author(s)
  Uno M., H. Iwamori, H. Nakamura, T. Yokoyama, T. Ishikawa, and M. Tanimizu
- Journal Title
  
  GEOCHEMICAL JOURNAL
  
  Volume: 48 Issue: 1 Pages: 29-49
- DOI
  10.2343/geochemj.2.0283
- NAID
  130004469399
- ISSN
  0016-7002, 1880-5973
- Year and Date
  2014-01-20
- Language
  English
- Peer Reviewed
- Data Source
  KAKENHI-PLANNED-21109006, KAKENHI-PROJECT-23340171, KAKENHI-PROJECT-25400524
[Journal Article] Chemical Separation of Mo and W from Terrestrial and Extraterrestrial Samples via Anion Exchange Chromatography2014
- Author(s)
  Nagai, Y. and Yokoyama, T.
- Journal Title
  
  Analytical Chemistry
  
  Volume: 86 Issue: 10 Pages: 4856-4863
- DOI
  10.1021/ac404223t
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23224012, KAKENHI-PROJECT-23340171, KAKENHI-PROJECT-25287144
[Journal Article] Precise tellurium isotope analysis by negative thermal ionization mass spectrometry (N-TIMS)2014
- Author(s)
  Fukami, Y. and Yokoyama, T
- Journal Title
  
  J. Anal. St. Spectrom
  
  Volume: 29 Issue: 3 Pages: 520-528
- DOI
  10.1039/c3ja50317h
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23340171, KAKENHI-PROJECT-25287144
[Journal Article] Chemical separation of Mo and W from terrestrial and extraterrestrial samples via anion exchange chromatography2014
- Author(s)
  Nagai, Y. & Yokoyama, T.
- Journal Title
  
  Analytical Chemistry
  
  Volume: 86 Pages: 4856-4863
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26220713
[Journal Article] Rare Earth Elements and Sr-Nd-Pb Isotopic Analyses of the Arima Hot Spring Waters, Southwest Japan: Implications for Origin of the Arima-type Brine2014
- Author(s)
  Nakamura, H., Fujita, Y., Nakai, S., Yokoyama, T., and Iwamori, H.
- Journal Title
  
  Journal of Geology & Geophysics
  
  Volume: 3:116 Issue: 04 Pages: 1000161-1000161
- DOI
  10.4172/2329-6755.1000161
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-22226015, KAKENHI-PROJECT-23224012, KAKENHI-PROJECT-25287144, KAKENHI-PROJECT-25400524, KAKENHI-PROJECT-26247083
[Journal Article] Elemental transport upon hydration of basic schists during regional metamorphism : geochemical evidence from the Sanbagawa metamorphic belt2014
- Author(s)
  Uno M., H.Iwamori, H.Nakamura, T.Yokoyama, T.Ishikawa, and M.Tanimizu
- Journal Title
  
  Japan. Geochem. J.
  
  Volume: 48 Pages: 29-49
- Peer Reviewed
- Data Source
  KAKENHI-PLANNED-21109006
[Journal Article] Current status of the debate about the age of Lake Nyos dam (Cameroon) and its bearing on potential flood hazards.2013
- Author(s)
  Aka, F.T. and Yokoyama, T.
- Journal Title
  
  Natural Hazards
  
  Volume: 65 Pages: 875-885
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23340171
[Journal Article] The naked planet Earth : Most essential pre-requisite for the origin and evolution of life2013
- Author(s)
  Maruyama, S., Ikoma, M., Genda, H. Hirose, K., Yokoyama, T. and Santosh, M
- Journal Title
  
  Geoscience Frontiers
  
  Volume: 4 Issue: 2 Pages: 141-165
- DOI
  10.1016/j.gsf.2012.11.001
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23340171
[Journal Article] The naked planet Earth: Most essential pre-requisite for the origin and evolution of life2013
- Author(s)
  Maruyama, S., Ikoma, M., Genda, H., Hirose, K., Yokoyama, T., Santosh, M.
- Journal Title
  
  Geoscience Frontiers
  
  Volume: 4 Pages: 141-165
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23224012
[Journal Article] . Tin Isotope Analysis of Cassiterites from Southeastern and Eastern Asia.2013
- Author(s)
  Yamazaki, E., Nakai, S., Yokoyama, T., Ishihara, S., Tang, H.
- Journal Title
  
  Geochem. J.
  
  Volume: 47 Pages: 21-35
- NAID
  10031156614
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23224012
[Journal Article] Tin Isotope Analysis of Cassiterites from Southeastern and Eastern Asia.2013
- Author(s)
  Yamazaki, E., Nakai, S., Yokoyama, T., Ishihara, S. and Tang, H.
- Journal Title
  
  Geochemical Journal
  
  Volume: 47 Pages: 21-35
- NAID
  10031156614
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23340171
[Journal Article] Sediment-enriched adakitic magmas from the Daisen volcanic field, Southwest Japan2013
- Author(s)
  Feineman, M., Moriguti, T., Yokoyama, T., Terui, S. and Nakamura, E.
- Journal Title
  
  Geochem. Geophys. Geosystem
  
  Volume: 14 Issue: 8 Pages: 3009-3031
- DOI
  10.1002/ggge.20176
- Peer Reviewed
- Data Source
  KAKENHI-PLANNED-21109006, KAKENHI-PROJECT-23224012, KAKENHI-PROJECT-23340160, KAKENHI-PROJECT-23340171
[Journal Article] Current status of the debate about the age of Lake Nyos dam (Cameroon) and its bearing on potential flood hazards.2013
- Author(s)
  Aka, F.T., Yokoyama, T.
- Journal Title
  
  Natural Hazards
  
  Volume: 65 Pages: 875-885
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23224012
[Journal Article] The naked planet Earth: Most essential pre-requisite for the origin2013
- Author(s)
  Maruyama, S., Ikoma, M., Genda, H. Hirose, K., Yokoyama, T. and Santosh, M.
- Journal Title
  
  Geoscience Frontiers
  
  Volume: 4 Pages: 141-165
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23340171
[Journal Article] Planetary-scale strontium isotopic heterogeneity and the age of volatile depletion of early solar system materials2012
- Author(s)
  Moynier, F., Day, J.M.D., Okui, W., Yokoyama, T., Bouvier, A., Walker, R.J. and Podosek, F.A.
- Journal Title
  
  Astrophys
  
  Volume: 758 Issue: 1 Pages: 45-51
- DOI
  10.1088/0004-637x/758/1/45
- Peer Reviewed
- Data Source
  KAKENHI-ORGANIZER-21109001, KAKENHI-PROJECT-23224012, KAKENHI-PROJECT-23340171, KAKENHI-PROJECT-24340102
[Journal Article] Pressure effect on element partitioning between minerals and silicate melt: involved with melting of basalt up to 20 GPa2012
- Author(s)
  T. Suzuki, T. Hirata, T. Yokoyama, T. Imai and E. Takahashi
- Journal Title
  
  Phys. Earth Planet. Inter.
  
  Volume: 208-209 Pages: 59-73
- DOI
  10.1016/j.pepi.2012.07.008
- Peer Reviewed
- Data Source
  KAKENHI-ORGANIZER-21109001, KAKENHI-PROJECT-21244082, KAKENHI-PLANNED-21109004
[Journal Article] Assessment of nebular versus parent body processes on presolar components present in chondrites : Evidence from osmium isotopes.2011
- Author(s)
  Yokoyama, T., Alexander, C.M.O'D., Walker, R.J.
- Journal Title
  
  Earth Planet.Sci.Lett. in press
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-21740388
[Journal Article] Timescales of magma differentiation from basalt to andesite beneath Hekla Volcano, Iceland : Constraints from U-series disequilibria in lavas from the last quarter-millennium flows.2011
- Author(s)
  Chekol, T.A., Kobayashi, K., Yokoyama, T., Sakaguchi, C., Nakamura, E.
- Journal Title
  
  Geochimica et Cosmochimica Acta
  
  Volume: 75 Pages: 256-283
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-22244069
[Journal Article] Assessment of nebular versus parent body processes on presolar components present in chondrites : Evidence from osmium isotopes2011
- Author(s)
  Yokoyama, T., Alexander, C.M.O'D., Walker, R.J.
- Journal Title
  
  Earth and Planetary Science Letters
  
  Volume: 305 Issue: 1-2 Pages: 115-123
- DOI
  10.1016/j.epsl.2011.02.046
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23340171
[Journal Article] Assessment of nebular versus parent body processes on presolar components present in chondrites : Evidence from osmium isotopes2011
- Author(s)
  Yokoyama, T., Alexander, C.M.O'D., Walker, R.J.
- Journal Title
  
  Earth Planet.Sci.Lett.
  
  Volume: 305 Pages: 115-123
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23224012
[Journal Article] Geochemical evolution of historical lavas from Askja Volcano, Iceland : Implications for mechanisms and timescales of magmatic differentiation.2011
- Author(s)
  Kuritani, T., Yokoyama, T., Kitagawa, H., Kobayashi, K., Nakamura, E.
- Journal Title
  
  Geochim.Cosmochim.Acta 75
  
  Pages: 570-587
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-21740388
[Journal Article] Osmium isotope anomalies in chondrites : Results for acid residues and related leachates2011
- Author(s)
  Yokoyama, T., Alexander, C.M.O'D., Walker, R.J.
- Journal Title
  
  Earth and Planetary Science Letters
  
  Volume: (in press)
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-21740388
[Journal Article] Timescales of magma differentiation from basalt to andesite beneath Hekla Volcano, Iceland : Constraints from U-series disequilibria in lavas from the last quarter-millennium flows.2011
- Author(s)
  Chekol, T.A., Kobayashi, K., Yokoyama, T., Sakaguchi, C., Nakamura, E.
- Journal Title
  
  Geochim.Cosmochim.Acta 75
  
  Pages: 256-283
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-21740388
[Journal Article] Evaluation of Laser Ablation in Liquid (LAL) technique as a new sampling technique for elemental and isotopic analysis using ICP-mass spectrometry2011
- Author(s)
  Satoki Okabayashi, Takaomi D.Yokoyama, Yoshiaki Kon, Shinji Yamamoto, Tetsuya Yokoyama, Takafumi Hirata
- Journal Title
  
  J.Anal.Atom.Spectrom.
  
  Volume: 26 Issue: 7 Pages: 1393-1400
- DOI
  10.1039/c0ja00200c
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-21340159, KAKENHI-PROJECT-23340171
[Journal Article] Timescales of magma differentiation from basalt to andesite beneath Hekla Volcano, Iceland : Constraints from U-series disequilibria in lavas from the last quarter-millennium flows.2011
- Author(s)
  Chekol, T.A., Kobayashi, K., Yokoyama, T., Sakaguchi, C., Nakamura, E.
- Journal Title
  
  Geochimica et Cosmochimica Acta
  
  Volume: 75 Pages: 256-283
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-21740388
[Journal Article] Determinations of REE Abundance and U-Pb age of Zircons using Multispot Laser Ablation-ICP-Mass Spectrometry2011
- Author(s)
  Yokoyama, T.D., Suzuki, T., Kon, Y., Hirata, T.
- Journal Title
  
  Analytical Chemistry
  
  Volume: 83 Pages: 8892-8899
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23340171
[Journal Article] Geochemical evolution of historical lavas from Askja Volcano, Iceland : Implications for mechanisms and timescales of magmatic differentiation.2011
- Author(s)
  Kuritani, T., Yokoyama, T., Kitagawa, H., Kobayashi, K., Nakamura, E.
- Journal Title
  
  Geochimica et Cosmochimica Acta
  
  Volume: 75 Pages: 570-587
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-21740388
[Journal Article] Evaluation of Laser Ablation in Liquid (LAL) technique as a new sampling technique for elemental and isotopic analysis using ICP-mass spectrometry2011
- Author(s)
  Okabayashi, S., Yokoyama, T.D., Kon, Y., Yamamoto, S., Yokoyama, T., Hirata, T.
- Journal Title
  
  J.Anal.Atom.Spectrom
  
  Volume: 26 Pages: 1393-1400
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23224012
[Journal Article] Assessment of nebular versus parent body processes on presolar components present in chondrites: Evidence from osmium isotopes.2011
- Author(s)
  T. Yokoyama
- Journal Title
  
  Earth Planet. Sci. Lett.
  
  Volume: 305 Pages: 115-123
- Peer Reviewed
- Data Source
  KAKENHI-PLANNED-21109006
[Journal Article] isotope anomalies in chondrites : Results for acid residues and related leachates.2010
- Author(s)
  Yokoyama, T., Alexander, C.M.O'D., Walker, R.J.Osmium
- Journal Title
  
  Earth Planet.Sci.Lett. 291
  
  Pages: 48-59
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-21740388
[Journal Article] Osmium isotope anomalies in chondrites : Results for acid residues and related leachates2010
- Author(s)
  Yokoyama, T., Alexander, C.M.O'D., Walker, R.J.
- Journal Title
  
  Earth and Planetary Science Letters 291
  
  Pages: 48-59
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-21740388
[Journal Article] Contributors to chromium isotope variation of meteorites.2010
- Author(s)
  Qin, L., Alexander, C.M.O'D., Carlson, R.W., Horan, M.F., Yokoyama, T.
- Journal Title
  
  Geochim.Cosmochim Acta 74
  
  Pages: 1122-1145
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-21740388
[Journal Article] Contributors to chromium isotope variation of meteorites2010
- Author(s)
  Qin, L., Alexander, C.M.O'D., Carlson, R.W., Horan, M.F., Yokoyama, T.
- Journal Title
  
  Geochim.Cosmochim Acta
  
  Volume: 74 Pages: 1122-1145
- Peer Reviewed
- Data Source
  KAKENHI-PLANNED-21109006
[Journal Article] Contributors to chromium isotope variation of meteorites2010
- Author(s)
  Qin, L., Alexander, C.M.O'D., Carlson, R.W., Horan, M.F., Yokoyama, T.
- Journal Title
  
  Geochimica et Cosmochimica Acta 74
  
  Pages: 1122-1145
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-21740388
[Journal Article] Osmium isotope anomalies in chondrites : Results for acid residues and related leachates2010
- Author(s)
  Yokoyama, T., Alexander, C.M.O'D., Walker, R.J.
- Journal Title
  
  Earth Planet.Sci.Lett.
  
  Volume: 291 Pages: 48-59
- Peer Reviewed
- Data Source
  KAKENHI-PLANNED-21109006
[Presentation] Homogeneous osmium isotopic composition in Ryugu materials and CI chondrites.2024
- Author(s)
  Nakanishi, N., Yokoyama, T., Ishikawa, A., Walker, R.J.
- Organizer
  Lunar and Planetary Science Conference, The Woodlands, USA.
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-23H00143
[Presentation] Nucleosynthetic Cr and Ti isotope anomalies in Ryugu samples.2024
- Author(s)
  Yokoyama, T., Wadha, M., Iizuka, T. et al.
- Organizer
  Lunar and Planetary Science Conference, The Woodlands, USA.
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-21KK0058
[Presentation] Nucleosynthetic calcium isotope anomalies in refractory inclusions from the Allende meteorite.2024
- Author(s)
  Masuda, Y., Schiller, M., Bizzarro, M., Yokoyama, T.
- Organizer
  Lunar and Planetary Science Conference, The Woodlands, USA.
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-21KK0058
[Presentation] Strontium and lead isotope systematics of shergottite meteorites: Implications for geochemical heterogeneity in the Martian mantle.2024
- Author(s)
  Moriwaki, R., Machida, S., Yokoyama, T.
- Organizer
  Lunar and Planetary Science Conference, The Woodlands, USA.
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-23H00143
[Presentation] Nucleosynthetic calcium isotope anomalies in refractory inclusions from the Allende meteorite.2024
- Author(s)
  Masuda, Y., Schiller, M., Bizzarro, M., Yokoyama, T.
- Organizer
  Lunar and Planetary Science Conference, The Woodlands, USA.
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-23H00143
[Presentation] Comparative Analysis of Natural Jarosite and Alunite-Bearing Rocks: Exploring Mineralogical, Textural, and Spectral Insights into Diverse Geological Settings.2024
- Author(s)
  Cao, F., Flemming, R.L., Izawa, M.R.M., Yokoyama, T., Yamashita, S., Masuda, Y., Gautam, I.
- Organizer
  Lunar and Planetary Science Conference, The Woodlands, USA.
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-23H00143
[Presentation] Comparative Analysis of Natural Jarosite and Alunite-Bearing Rocks: Exploring Mineralogical, Textural, and Spectral Insights into Diverse Geological Settings.2024
- Author(s)
  Cao, F., Flemming, R.L., Izawa, M.R.M., Yokoyama, T., Yamashita, S., Masuda, Y., Gautam, I.
- Organizer
  Lunar and Planetary Science Conference, The Woodlands, USA.
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-21KK0058
[Presentation] Nucleosynthetic Cr and Ti isotope anomalies in Ryugu samples.2024
- Author(s)
  Yokoyama, T., Wadha, M., Iizuka, T. et al.
- Organizer
  Lunar and Planetary Science Conference, The Woodlands, USA.
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-23H00143
[Presentation] Homogeneous osmium isotopic composition in Ryugu materials and CI chondrites.2024
- Author(s)
  Nakanishi, N., Yokoyama, T., Ishikawa, A., Walker, R.J.
- Organizer
  Lunar and Planetary Science Conference, The Woodlands, USA.
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-21KK0058
[Presentation] Strontium and lead isotope systematics of shergottite meteorites: Implications for geochemical heterogeneity in the Martian mantle.2024
- Author(s)
  Moriwaki, R., Machida, S., Yokoyama, T.
- Organizer
  Lunar and Planetary Science Conference, The Woodlands, USA.
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-21KK0058
[Presentation] Radiogenic, nucleosynthetic, and stable isotope variations in strontium in samples returned by Hayabusa2 of Cb-type asteroid Ryugu.2023
- Author(s)
  Wadhwa, M., Y. Masuda, Y., Rai, V. K., I. Gautam, I., Haba, M. K., Yokoyama, T., Hines, R., et al.
- Organizer
  Lunar and Planetary Science Conference, The Woodlands, USA.
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-21KK0058
[Presentation] Zinc, copper and calcium isotopic composition of Ryugu’s samples.2023
- Author(s)
  Moynier, F., Paquet, M., Dai, W., Yokoyama, T., Hu, Y., et al.
- Organizer
  Goldschmidt Conference, Lyon, France
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-21KK0058
[Presentation] New consortium study to determine the solar system composition using Ryugu samples., France. 2023/7/10.2023
- Author(s)
  Yokoyama, T., Dauphas, N., Fukai, R., Usui, T., Tachibana, S., Sch?nb?chler, M., Busemann, H., Abe, M., Yada, T.
- Organizer
  Goldschmidt Conference, Lyon, France
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-23H00143
[Presentation] Nickel isotopic composition of Ryugu samples returned by the Hayabusa2 mission.2023
- Author(s)
  Spitzer, F., Burkhardt, C., Kleine, T., …, Yokoyama, T., et al.
- Organizer
  Lunar and Planetary Science Conference, The Woodlands, USA.
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-21KK0058
[Presentation] シャーゴッタイト隕石のSr-Pb同位体組成分析に基づく火星マントルの地球化学的不均質の成因考察2023
- Author(s)
  森脇涼太、町田嗣樹、横山哲也
- Organizer
  日本地球化学会2023年会, 東京海洋大学
- Data Source
  KAKENHI-PROJECT-21KK0058
[Presentation] Nucleosynthetic isotopic anomalies of Ti and Cr in fine-grained CAIs from the Allende meteorite.2023
- Author(s)
  Masuda, Y., Yokoyama, T., Iizuka, T., Hibiya, Y.
- Organizer
  Goldschmidt Conference, Lyon, France
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-21KK0058
[Presentation] Molybdenum isotopic compositions in igneous rocks from Izu arc.2023
- Author(s)
  Tamura, T., Yokoyama, T., Kuritani, T., Ishikawa, A., Gautam, I.
- Organizer
  IAVCEI 2023, Rotorua, New Zealand.
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] CAIsの核合成起源Cr-Ti同位体異常2023
- Author(s)
  増田雄樹、横山哲也、飯塚毅、日比谷由紀
- Organizer
  日本地球化学会2023年会, 東京海洋大学
- Data Source
  KAKENHI-PROJECT-21KK0058
[Presentation] Highly siderophile element geochemistry of Phanerozoic komatiites and related mafic-ultramafic rocks in Gorgona island, Columbia.2023
- Author(s)
  Ihara, Y., Ishikawa, A., Yokoyama, T., Shimizu, K.
- Organizer
  Goldschmidt Conference, Lyon, France
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-21KK0058
[Presentation] Barium isotopic composition of Ryugu samples by the Hayabusa2 mission.2023
- Author(s)
  Hidaka, H., Yoneda, S., Gautam, I., Yokoyama, T., et al.
- Organizer
  Goldschmidt Conference, Lyon, France
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-23H00143
[Presentation] Zirconium isotope composition of samples returned from the asteroid Ryugu2023
- Author(s)
  Fehr, M.A., Sch?nb?chler, M., Yokoyama, T., et al.
- Organizer
  Goldschmidt Conference, Lyon, France
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-23H00143
[Presentation] Samarium and neodymium isotopic compositions of C-type asteroid (162173) Ryugu.2023
- Author(s)
  Z. A. Torrano, Z. A., Jordan, M. K., Mock, T. D., Carlson, R. W., Yokoyama, T., Gautam, I., et al.
- Organizer
  Lunar and Planetary Science Conference, The Woodlands, USA.
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] Molybdenum isotopic composition in volcanic rocks from Izu arc and Northeast Japan.2023
- Author(s)
  Tamura, T., Yokoyama, T., Gill, J.B., Iwamori, H., Kuritani, T., Ueki, K.
- Organizer
  AGU Fall Meeting 2023, San Francisco, USA.
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-21KK0058
[Presentation] Samarium and neodymium isotopic compositions of C-type asteroid (162173) Ryugu.2023
- Author(s)
  Z. A. Torrano, Z. A., Jordan, M. K., Mock, T. D., Carlson, R. W., Yokoyama, T., Gautam, I., et al.
- Organizer
  Lunar and Planetary Science Conference, The Woodlands, USA.
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-21KK0058
[Presentation] The thermal and chemical litho-stratigraphy beneath the Hawaiian Islands2023
- Author(s)
  Ryo Fujita, Akira Ishikawa, Tetsuya Yokoyama, Michael O. Garcia
- Organizer
  Goldschmidt2023
- Data Source
  KAKENHI-PROJECT-19H01998
[Presentation] TIMSを用いた高精度クロム同位体測定における二次的質量分別効果の評価2023
- Author(s)
  横山哲也
- Organizer
  日本地球化学会2023年会, 東京海洋大学
- Data Source
  KAKENHI-PROJECT-21KK0058
[Presentation] Nickel isotopic composition of Ryugu samples returned by the Hayabusa2 mission2023
- Author(s)
  Spitzer, F., Burkhardt, C., Kleine, T., …, Yokoyama, T., et al.
- Organizer
  Goldschmidt Conference, Lyon, France
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-21KK0058
[Presentation] Highly siderophile elements and Os isotope compositions of Ryugu samples.2023
- Author(s)
  Ishikawa, A., Yokoyama, T., Nakanisi, N., Walker, R.J.
- Organizer
  Goldschmidt Conference, Lyon, France
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-23H00143
[Presentation] Nickel isotopic composition of Ryugu samples returned by the Hayabusa2 mission.2023
- Author(s)
  Spitzer, F., Burkhardt, C., Kleine, T., …, Yokoyama, T., et al.
- Organizer
  Lunar and Planetary Science Conference, The Woodlands, USA.
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] TIMSを用いた高精度クロム同位体測定における二次的質量分別効果の評価2023
- Author(s)
  横山哲也
- Organizer
  日本地球化学会2023年会, 東京海洋大学
- Data Source
  KAKENHI-PROJECT-23H00143
[Presentation] An exploration of hydrogen content in magnetite from asteroid Ryugu.2023
- Author(s)
  Aleon, J., Mostefaoui, S., Bureau, H., Vangu, D., Khodja, H., …, Yokoyama, T., et al.
- Organizer
  Lunar and Planetary Science Conference, The Woodlands, USA.
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-21KK0058
[Presentation] CAIsの核合成起源Cr-Ti同位体異常2023
- Author(s)
  増田雄樹、横山哲也、飯塚毅、日比谷由紀
- Organizer
  日本地球化学会2023年会, 東京海洋大学
- Data Source
  KAKENHI-PROJECT-23H00143
[Presentation] Cr-rich and Al-rich oxide grains with 16O-rich compositions in Ryugu samples.2023
- Author(s)
  Nguyen, A.N., Mane, P., Keller, L.P., Rahman, Z, Piani, L., …, Yokoyama, T., et al.
- Organizer
  MetSoc, Los Angels, USA
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-21KK0058
[Presentation] Zirconium isotope composition of samples returned from the asteroid Ryugu2023
- Author(s)
  Fehr, M.A., Sch?nb?chler, M., Yokoyama, T., et al.
- Organizer
  Goldschmidt Conference, Lyon, France
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-21KK0058
[Presentation] Highly siderophile elements and Os isotope compositions of Ryugu samples.2023
- Author(s)
  Ishikawa, A., Yokoyama, T., Nakanisi, N., Walker, R.J.
- Organizer
  Goldschmidt Conference, Lyon, France
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-21KK0058
[Presentation] Molybdenum isotopic composition in volcanic rocks from Izu arc and Northeast Japan.2023
- Author(s)
  Tamura, T., Yokoyama, T., Gill, J.B., Iwamori, H., Kuritani, T., Ueki, K.
- Organizer
  AGU Fall Meeting 2023, San Francisco, USA.
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-23H00143
[Presentation] Nickel isotopic composition of Ryugu samples returned by the Hayabusa2 mission2023
- Author(s)
  Spitzer, F., Burkhardt, C., Kleine, T., …, Yokoyama, T., et al.
- Organizer
  Goldschmidt Conference, Lyon, France
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-23H00143
[Presentation] Cr-rich and Al-rich oxide grains with 16O-rich compositions in Ryugu samples.2023
- Author(s)
  Nguyen, A.N., Mane, P., Keller, L.P., Rahman, Z, Piani, L., …, Yokoyama, T., et al.
- Organizer
  MetSoc, Los Angels, USA
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-23H00143
[Presentation] Zinc, copper and calcium isotopic composition of Ryugu’s samples.2023
- Author(s)
  Moynier, F., Paquet, M., Dai, W., Yokoyama, T., Hu, Y., et al.
- Organizer
  Goldschmidt Conference, Lyon, France
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-23H00143
[Presentation] Radiogenic, nucleosynthetic, and stable isotope variations in strontium in samples returned by Hayabusa2 of Cb-type asteroid Ryugu.2023
- Author(s)
  Wadhwa, M., Y. Masuda, Y., Rai, V. K., I. Gautam, I., Haba, M. K., Yokoyama, T., Hines, R., et al.
- Organizer
  Lunar and Planetary Science Conference, The Woodlands, USA.
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] An exploration of hydrogen content in magnetite from asteroid Ryugu.2023
- Author(s)
  Aleon, J., Mostefaoui, S., Bureau, H., Vangu, D., Khodja, H., …, Yokoyama, T., et al.
- Organizer
  Lunar and Planetary Science Conference, The Woodlands, USA.
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] High precision sims oxygen isotope analyses of carbonates in Ryugu.2023
- Author(s)
  Kita, K. N., Kitajima, T., Kawasaki, N., Nagashima, K., Sakamoto, N., Yurimoto, H., …, Yokoyama, T., et al.
- Organizer
  Lunar and Planetary Science Conference, The Woodlands, USA.
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-21KK0058
[Presentation] New consortium study to determine the solar system composition using Ryugu samples., France. 2023/7/10.2023
- Author(s)
  Yokoyama, T., Dauphas, N., Fukai, R., Usui, T., Tachibana, S., Sch?nb?chler, M., Busemann, H., Abe, M., Yada, T.
- Organizer
  Goldschmidt Conference, Lyon, France
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-21KK0058
[Presentation] High precision sims oxygen isotope analyses of carbonates in Ryugu.2023
- Author(s)
  Kita, K. N., Kitajima, T., Kawasaki, N., Nagashima, K., Sakamoto, N., Yurimoto, H., …, Yokoyama, T., et al.
- Organizer
  Lunar and Planetary Science Conference, The Woodlands, USA.
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] The thermal and chemical litho-stratigraphy beneath the Hawaiian Islands.2023
- Author(s)
  Fujita, R., Ishikawa, A., Yokoyama, T., Garcia, M.O.
- Organizer
  Goldschmidt Conference, Lyon, France
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-21KK0058
[Presentation] The Ryugu Reference Powder (RRP): A consortium study of elemental and isotopic solar system abundances.2023
- Author(s)
  Yokoyama, T., Dauphas, N., Fukai, R., Usui, T., Tachibana, S., Schoenbaechler, M., Busemann, H., Abe, M., Yada, T.
- Organizer
  Lunar and Planetary Science Conference, The Woodlands, USA.
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] The thermal and chemical litho-stratigraphy beneath the Hawaiian Islands.2023
- Author(s)
  Fujita, R., Ishikawa, A., Yokoyama, T., Garcia, M.O.
- Organizer
  Goldschmidt Conference, Lyon, France
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-23H00143
[Presentation] Barium isotopic composition of Ryugu samples by the Hayabusa2 mission.2023
- Author(s)
  Hidaka, H., Yoneda, S., Gautam, I., Yokoyama, T., et al.
- Organizer
  Goldschmidt Conference, Lyon, France
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-21KK0058
[Presentation] Nucleosynthetic isotopic anomalies of Ti and Cr in fine-grained CAIs from the Allende meteorite.2023
- Author(s)
  Masuda, Y., Yokoyama, T., Iizuka, T., Hibiya, Y.
- Organizer
  Goldschmidt Conference, Lyon, France
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-23H00143
[Presentation] Highly siderophile element geochemistry of Phanerozoic komatiites and related mafic-ultramafic rocks in Gorgona island, Columbia.2023
- Author(s)
  Ihara, Y., Ishikawa, A., Yokoyama, T., Shimizu, K.
- Organizer
  Goldschmidt Conference, Lyon, France
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-23H00143
[Presentation] シャーゴッタイト隕石のSr-Pb同位体組成分析に基づく火星マントルの地球化学的不均質の成因考察2023
- Author(s)
  森脇涼太、町田嗣樹、横山哲也
- Organizer
  日本地球化学会2023年会, 東京海洋大学
- Data Source
  KAKENHI-PROJECT-23H00143
[Presentation] The Ryugu Reference Powder (RRP): A consortium study of elemental and isotopic solar system abundances.2023
- Author(s)
  Yokoyama, T., Dauphas, N., Fukai, R., Usui, T., Tachibana, S., Schoenbaechler, M., Busemann, H., Abe, M., Yada, T.
- Organizer
  Lunar and Planetary Science Conference, The Woodlands, USA.
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-21KK0058
[Presentation] Chemical abundances in Ryugu, nugget effect, and cosmic composition.2022
- Author(s)
  Dauphas, N., Yokoyama, T., Fukai, R., Usui, T., Tachibana, S., Sch?nb?chler, M., Davis, A. M., Yurimoto, H., et al.
- Organizer
  Hayabusa Symposium 2022, Sagamihara, Kanagawa.
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-21KK0058
[Presentation] Zinc, copper and calcium isotopic composition of Ryugu’s samples.2022
- Author(s)
  Moynier, F., Paquet, M., Dai, W., Yokoyama, T., Hu, Y., et al.
- Organizer
  Hayabusa Symposium 2022, Sagamihara, Kanagawa.
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-21KK0058
[Presentation] 火星隕石のクロム同位体組成2022
- Author(s)
  西川慶次、横山哲也
- Organizer
  日本地球化学会2022年会, 高知大学
- Data Source
  KAKENHI-PROJECT-21KK0058
[Presentation] Speciation of sulfur in carbonates in a 4.1-billion-year-old Martian meteorite.2022
- Author(s)
  Kajitani, I, Nakada, R., Koike, M., Tanabe, G., Usui, T., Marsuura, R., Fukushi, K., Kurokawa, H., Yokoyama, T.
- Organizer
  Lunar and Planetary Science Conference, The Woodlands, USA (hybrid)
- Int'l Joint Research
- Data Source
  KAKENHI-PUBLICLY-20H04609
[Presentation] Presolar C- and O-rich grains in the matrix and a clast in asteroid Ryugu.2022
- Author(s)
  Nguyen, A. N., Mane, P., Piani, L., …, Yokoyama, T., et al.
- Organizer
  MetSoc, Glasgow, UK.
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-21KK0058
[Presentation] Oxygen isotope analyses of magnetite in Ryugu.2022
- Author(s)
  Kita, K. N., Kitajima, T., Nagashima, K., Kawasaki, N., Sakamoto, N., Yurimoto, H., …, Yokoyama, T., et al.
- Organizer
  Hayabusa Symposium 2022, Sagamihara, Kanagawa.
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-21KK0058
[Presentation] Cr and Ti isotope systematics of Ryugu samples.2022
- Author(s)
  Yokoyama, T., et al.
- Organizer
  Goldschmidt Conference, Hawaii, USA.
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] In-situ oxygen and manganese-chromium isotope studies of Ryugu: Implications to temperature and timing of aqueous activity.2022
- Author(s)
  Nagashima, K., Yokoyama, T., et al.
- Organizer
  Lunar and Planetary Science Conference, The Woodlands, USA (hybrid)
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-21KK0058
[Presentation] In-situ oxygen and manganese-chromium isotope studies of Ryugu: Implications to temperature and timing of aqueous activity.2022
- Author(s)
  Nagashima, K., Yokoyama, T., et al.
- Organizer
  Lunar and Planetary Science Conference, The Woodlands, USA (hybrid)
- Int'l Joint Research
- Data Source
  KAKENHI-PUBLICLY-20H04609
[Presentation] コロンビア, ゴルゴナ島に産する顕生代コマチアイトのマグマ源：オスミウム同位体不均質性からの考察2022
- Author(s)
  井原悠太、石川晃、清水健二、横山哲也
- Organizer
  JpGU 2022, 幕張
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] Chemical and isotopic characterization of asteroid Ryugu.2022
- Author(s)
  Yurimoto, H., Yokoyama, T., et al.
- Organizer
  Lunar and Planetary Science Conference, The Woodlands, USA (hybrid)
- Int'l Joint Research
- Data Source
  KAKENHI-PUBLICLY-20H04609
[Presentation] 隕石の精密同位体分析に基づく銀河系化学進化とr核種の起源2022
- Author(s)
  横山哲也
- Organizer
  天の川銀河研究会2022, 鹿児島大学
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] Molybdenum and Osmium isotopic compositions of Ryugu sample.2022
- Author(s)
  Nakanishi, N., Ishikawa, A., Yokoyama, T., Walker, R.J.
- Organizer
  Hayabusa Symposium 2022, Sagamihara, Kanagawa.
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] Origin of nucleosynthetic Sr isotope anomalies in fine grained calcium and aluminum-rich inclusions from Allende2022
- Author(s)
  Masuda, Y., Yokoyama, T.
- Organizer
  Lunar and Planetary Science Conference, The Woodlands, USA
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-18H01258
[Presentation] Oxygen isotope analyses of magnetite in Ryugu.2022
- Author(s)
  Kita, K. N., Kitajima, T., Nagashima, K., Kawasaki, N., Sakamoto, N., Yurimoto, H., …, Yokoyama, T., et al.
- Organizer
  Hayabusa Symposium 2022, Sagamihara, Kanagawa.
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] Dauphas, N., Yokoyama, T., et al.2022
- Author(s)
  Dauphas, N., Yokoyama, T., et al.
- Organizer
  Lunar and Planetary Science Conference, The Woodlands, USA (hybrid)
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-21KK0058
[Presentation] Molybdenum and Osmium isotopic compositions of Ryugu sample2022
- Author(s)
  Nakanishi, N., Ishikawa, A., Yokoyama, T., Walker, R. J.
- Organizer
  Hayabusa Symposium 2022
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-18H01258
[Presentation] The oxygen isotopic composition of samples returned from asteroid Ryugu: Evidence for similarity to CI chondrites.2022
- Author(s)
  Young, E.D., Tang, H., Tafla, L., Pack, A., Rocco, T.Di, Yurimoto, H., Yokoyama, T., et al.
- Organizer
  Lunar and Planetary Science Conference, The Woodlands, USA (hybrid)
- Int'l Joint Research
- Data Source
  KAKENHI-PUBLICLY-20H04609
[Presentation] The oxygen isotopic composition of samples returned from asteroid Ryugu: Evidence for similarity to CI chondrites.2022
- Author(s)
  Young, E.D., Tang, H., Tafla, L., Pack, A., Rocco, T.Di, Yurimoto, H., Yokoyama, T., et al.
- Organizer
  Lunar and Planetary Science Conference, The Woodlands, USA (hybrid)
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] Molybdenum isotopic compositions in volcanic rocks from the Izu islands2022
- Author(s)
  Tatsuya Tamura, Tetsuya Yokoyama, Akira Ishikawa, Takeshi Kuritani, Ikshu Gautam
- Organizer
  Japan Geoscience Union Meeting 2022
- Data Source
  KAKENHI-PROJECT-19H01998
[Presentation] Cr and Ti isotope systematics of Ryugu samples.2022
- Author(s)
  Yokoyama, T., et al.
- Organizer
  Goldschmidt Conference, Hawaii, USA.
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-21KK0058
[Presentation] Simple and accurate determination of chalcophile and highly siderophile elements in carbonaceous chondrites using triple quadrupole ICP-MS2022
- Author(s)
  Akira Ishikawa, Shun Nakano, Ryo Fujita, Tetsuya Yokoyama
- Organizer
  Goldschmidt2022
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H01998
[Presentation] 元素の起源と地球化学2022
- Author(s)
  横山哲也
- Organizer
  放射化学討論会2022, 東京大学
- Invited
- Data Source
  KAKENHI-PROJECT-21KK0058
[Presentation] Multi-isotopic analyses of bulk Ryugu samples returned by the Hayabusa2 mission2022
- Author(s)
  Yokoyama, T., et al.
- Organizer
  Lunar and Planetary Science Conference, The Woodlands, USA (hybrid)
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] Chemical and isotopic characterization of asteroid Ryugu.2022
- Author(s)
  Yurimoto, H., Yokoyama, T., et al.
- Organizer
  Lunar and Planetary Science Conference, The Woodlands, USA (hybrid)
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] 神津島の流紋岩及び玄武岩質捕獲岩のMo安定同位体組成2022
- Author(s)
  田村達也, 横山哲也, 石川晃
- Organizer
  日本地球化学会第69回年会
- Data Source
  KAKENHI-PROJECT-19H01998
[Presentation] Samarium and neodymium isotopic compositions of C-type asteroid (162173) Ryugu2022
- Author(s)
  Torrano, Z. A., Jordan, M. K., Mock, T. D., Carlson, R. W., Yokoyama, T., Gautam, I., et al.
- Organizer
  Lunar and Planetary Science Conference
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-18H01258
[Presentation] アルカリ融解法によるコンドライト中のCrおよびTi同位体組成の決定2022
- Author(s)
  大熊悠介、横山哲也、　飯塚毅、増田雄樹
- Organizer
  同位体比部会2022, 箱根
- Data Source
  KAKENHI-PROJECT-21KK0058
[Presentation] Presolar C- and O-rich grains in the matrix and a clast in asteroid Ryugu.2022
- Author(s)
  Nguyen, A. N., Mane, P., Piani, L., …, Yokoyama, T., et al.
- Organizer
  MetSoc, Glasgow, UK.
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] 地球外物質の精密Cr同位体測定法の開発2022
- Author(s)
  横山哲也、住谷格生、大熊悠介、西川慶次
- Organizer
  JpGU 2022, 幕張
- Data Source
  KAKENHI-PROJECT-21KK0058
[Presentation] The isotopic variations in bulk-scale carbonaceous chondrites and the possible targets in the next sample return mission.2022
- Author(s)
  Fukai, R., Yokoyama, T., Arakawa, S., Homma, K., Okuzumi, S., Shimaki, Y.
- Organizer
  Goldschmidt Conference, Hawaii, USA.
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] 元素の起源と地球化学2022
- Author(s)
  横山哲也
- Organizer
  放射化学討論会2022
- Invited
- Data Source
  KAKENHI-PROJECT-18H01258
[Presentation] 火星隕石のクロム同位体組成2022
- Author(s)
  西川慶次、横山哲也
- Organizer
  日本地球化学会2022年会, 高知大学
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] Sampling mass and chemical heterogeneities among Ryugu samples returned by the Hayabusa2 mission.2022
- Author(s)
  Dauphas, N., Yokoyama, T., et al.
- Organizer
  Lunar and Planetary Science Conference, The Woodlands, USA (hybrid)
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] Origin of nucleosynthetic Sr isotope anomalies in fine grained calcium and aluminum-rich inclusions from Allende2022
- Author(s)
  Masuda, Y., Yokoyama, T.
- Organizer
  Lunar and Planetary Science Conference
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-18H01258
[Presentation] Distinct ages and temperatures of aqueous activities recorded in Ryugu samples.2022
- Author(s)
  Nagashima, K., Kawasaki, N., Sakamoto, N., Fujiya, W., Yurimoto, H., …, Yokoyama, T., et al.
- Organizer
  Hayabusa Symposium 2022, Sagamihara, Kanagawa.
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] Oxygen and carbon isotope compositions of Ryugu’s carbonates: Constraints on the conditions of aqueous alteration.2022
- Author(s)
  Fujiya, W., Kawasaki, N., Nagashima, K., Alexander, C. M. O’D., Yurimoto, H., … Yokoyama, T., et al.
- Organizer
  Hayabusa Symposium 2022, Sagamihara, Kanagawa.
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] Sampling mass and chemical heterogeneities among Ryugu samples returned by the Hayabusa2 mission.2022
- Author(s)
  Dauphas, N., Yokoyama, T., et al.
- Organizer
  Lunar and Planetary Science Conference, The Woodlands, USA (hybrid)
- Int'l Joint Research
- Data Source
  KAKENHI-PUBLICLY-20H04609
[Presentation] Multi-isotopic analyses of bulk Ryugu samples returned by the Hayabusa2 mission2022
- Author(s)
  Yokoyama, T., et al.
- Organizer
  Lunar and Planetary Science Conference, The Woodlands, USA (hybrid)
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-21KK0058
[Presentation] Zinc, copper and calcium isotopic composition of Ryugu’s samples.2022
- Author(s)
  Moynier, F., Paquet, M., Dai, W., Yokoyama, T., Hu, Y., et al.
- Organizer
  Hayabusa Symposium 2022, Sagamihara, Kanagawa.
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] Distribution of rare-earth elements in fine-grained Calcium and Aluminum-rich inclusions from Allende meteorite.2022
- Author(s)
  Masuda, Y., Niki, S., Yokoyama, T., Hirata, T.
- Organizer
  Goldschmidt Conference, Hawaii, USA.
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-21KK0058
[Presentation] Pb isotopic compositions of Ryugu samples and carbonaceous chondrites.2022
- Author(s)
  Haba, M.K., Yokoyama, T., et al.
- Organizer
  Goldschmidt Conference, Hawaii, USA.
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] Recent progress on the application of nucleosynthetic isotope anomalies in meteorites to elucidate the origin of r-process nuclides.2022
- Author(s)
  Yokoyama, T., Tsujimoto, T., Fukai, R.
- Organizer
  JpGU 2022, 幕張
- Invited
- Data Source
  KAKENHI-PROJECT-21KK0058
[Presentation] Recent progress on the application of nucleosynthetic isotope anomalies in meteorites to elucidate the origin of r-process nuclides2022
- Author(s)
  Yokoyama, T., Tsujimoto, T., Fukai, R.
- Organizer
  JpGU 2022
- Invited
- Data Source
  KAKENHI-PROJECT-18H01258
[Presentation] 炭素質隕石・非炭素質隕石の同位体組成バリエーション2022
- Author(s)
  深井稜汰, 荒川創太, 本間和明, 横山哲也, 奥住聡, 嶌生有理
- Organizer
  JpGU 2022, 幕張
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] Molybdenum and Osmium isotopic compositions of Ryugu sample.2022
- Author(s)
  Nakanishi, N., Ishikawa, A., Yokoyama, T., Walker, R.J.
- Organizer
  Hayabusa Symposium 2022, Sagamihara, Kanagawa.
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-21KK0058
[Presentation] Nickel isotopic composition of Ryugu samples returned by the Hayabusa2 mission.2022
- Author(s)
  Spitzer, F., Burkhardt, C., Kleine, T., …, Yokoyama, T., et al.
- Organizer
  MetSoc, Glasgow, UK.
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] 5-stage multielement separation procedure: A unique and essential tool for the multi-isotopic analyses of precious (< 30 mg) meteorites and asteroidal materials.2022
- Author(s)
  Gautam, I., Yokoyama, T., Ohkuma, Y., Iizuka, T., Horan, M.F., Carlson, R.W.
- Organizer
  Goldschmidt Conference, Hawaii, USA.
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-21KK0058
[Presentation] 神津島の流紋岩及び玄武岩質捕獲岩のMo安定同位体組成2022
- Author(s)
  田村達也、横山哲也、石川晃
- Organizer
  日本地球化学会2022年会, 高知大学
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] Distinct ages and temperatures of aqueous activities recorded in Ryugu samples.2022
- Author(s)
  Nagashima, K., Kawasaki, N., Sakamoto, N., Fujiya, W., Yurimoto, H., …, Yokoyama, T., et al.
- Organizer
  Hayabusa Symposium 2022, Sagamihara, Kanagawa.
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-21KK0058
[Presentation] Pb isotopic compositions of Ryugu samples and carbonaceous chondrites.2022
- Author(s)
  Haba, M.K., Yokoyama, T., et al.
- Organizer
  Goldschmidt Conference, Hawaii, USA.
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-21KK0058
[Presentation] アエンデ隕石細粒CAIの核合成起源Ti同位体異常2022
- Author(s)
  増田雄樹、横山哲也、飯塚毅、日比谷由紀
- Organizer
  日本地球化学会2022年会, 高知大学
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] 地球外物質の精密Cr同位体測定法の開発2022
- Author(s)
  横山哲也、住谷格生、大熊悠介、西川慶次
- Organizer
  JpGU 2022, 幕張
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] 炭素質隕石・非炭素質隕石の同位体組成バリエーション2022
- Author(s)
  深井稜汰, 荒川創太, 本間和明, 横山哲也, 奥住聡, 嶌生有理
- Organizer
  JpGU 2022, 幕張
- Data Source
  KAKENHI-PROJECT-21KK0058
[Presentation] The oxygen isotopic composition of samples returned from asteroid Ryugu: Evidence for similarity to CI chondrites.2022
- Author(s)
  Young, E.D., Tang, H., Tafla, L., Pack, A., Rocco, T.Di, Yurimoto, H., Yokoyama, T., et al.
- Organizer
  Lunar and Planetary Science Conference, The Woodlands, USA (hybrid)
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-21KK0058
[Presentation] Recent progress on the application of nucleosynthetic isotope anomalies in meteorites to elucidate the origin of r-process nuclides.2022
- Author(s)
  Yokoyama, T., Tsujimoto, T., Fukai, R.
- Organizer
  JpGU 2022, 幕張
- Invited
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] Origin of nucleosynthetic Sr isotope anomalies in fine grained calcium and aluminum-rich inclusions from Allende.2022
- Author(s)
  Masuda, Y., Yokoyama, T.
- Organizer
  Lunar and Planetary Science Conference, The Woodlands, USA (hybrid)
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] Chemical and isotopic characterization of asteroid Ryugu.2022
- Author(s)
  Yurimoto, H., Yokoyama, T., et al.
- Organizer
  Lunar and Planetary Science Conference, The Woodlands, USA (hybrid)
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-21KK0058
[Presentation] Speciation of sulfur in carbonates in a 4.1-billion-year-old Martian meteorite.2022
- Author(s)
  Kajitani, I, Nakada, R., Koike, M., Tanabe, G., Usui, T., Marsuura, R., Fukushi, K., Kurokawa, H., Yokoyama, T.
- Organizer
  Lunar and Planetary Science Conference, The Woodlands, USA (hybrid)
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] Nickel isotopic composition of Ryugu samples returned by the Hayabusa2 mission.2022
- Author(s)
  Spitzer, F., Burkhardt, C., Kleine, T., …, Yokoyama, T., et al.
- Organizer
  MetSoc, Glasgow, UK.
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-21KK0058
[Presentation] Chemical abundances in Ryugu, nugget effect, and cosmic composition.2022
- Author(s)
  Dauphas, N., Yokoyama, T., Fukai, R., Usui, T., Tachibana, S., Schoenbaechler, M., Davis, A. M., Yurimoto, H., et al.
- Organizer
  Hayabusa Symposium 2022, Sagamihara, Kanagawa.
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] Simple and accurate determination of chalcophile and highly siderophile elements in carbonaceous chondrites using triple quadrupole ICP-MS.2022
- Author(s)
  Ishikawa, A., Nakano,S., Fujita, R., Yokoyama, T.
- Organizer
  Goldschmidt Conference, Hawaii, USA.
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] 5-stage multielement separation procedure: A unique and essential tool for the multi-isotopic analyses of precious (< 30 mg) meteorites and asteroidal materials.2022
- Author(s)
  Gautam, I., Yokoyama, T., Ohkuma, Y., Iizuka, T., Horan, M.F., Carlson, R.W.
- Organizer
  Goldschmidt Conference, Hawaii, USA.
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] 伊豆諸島火山岩のモリブデン同位体組成2022
- Author(s)
  田村達也、横山哲也、石川晃、栗谷豪、Gautam Ikshu
- Organizer
  JpGU 2022, 幕張
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] Oxygen and carbon isotope compositions of Ryugu’s carbonates: Constraints on the conditions of aqueous alteration.2022
- Author(s)
  Fujiya, W., Kawasaki, N., Nagashima, K., Alexander, C. M. O’D., Yurimoto, H., … Yokoyama, T., et al.
- Organizer
  Hayabusa Symposium 2022, Sagamihara, Kanagawa.
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-21KK0058
[Presentation] Rare-earth element imaging of fine-grained calcium and aluminum-rich inclusions in Allende meteorite.2022
- Author(s)
  Masuda, Y., Niki, S., Yokoyama, T., Hirata, T.
- Organizer
  JpGU 2022, 幕張
- Data Source
  KAKENHI-PROJECT-21KK0058
[Presentation] アルカリ融解法によるコンドライト中のCrおよびTi同位体組成の決定2022
- Author(s)
  大熊悠介、横山哲也、　飯塚毅、増田雄樹
- Organizer
  同位体比部会2022, 箱根
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] In-situ oxygen and manganese-chromium isotope studies of Ryugu: Implications to temperature and timing of aqueous activity.2022
- Author(s)
  Nagashima, K., Yokoyama, T., et al.
- Organizer
  Lunar and Planetary Science Conference, The Woodlands, USA (hybrid)
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] Hydrogen isotopic composition of water in Ryugu samples returned by the Hayabusa2 mission.2022
- Author(s)
  Piani, L., Marrocchi1, Y., Nagashima, K., Kawasaki, N., Sakamoto, N, Bajo, K., Yokoyama, T., et al.
- Organizer
  MetSoc, Glasgow, UK.
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-21KK0058
[Presentation] Origin of nucleosynthetic Sr isotope anomalies in fine grained calcium and aluminum-rich inclusions from Allende.2022
- Author(s)
  Masuda, Y., Yokoyama, T.
- Organizer
  Lunar and Planetary Science Conference, The Woodlands, USA (hybrid)
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-21KK0058
[Presentation] Speciation of sulfur in carbonates in a 4.1-billion-year-old Martian meteorite.2022
- Author(s)
  Kajitani, I, Nakada, R., Koike, M., Tanabe, G., Usui, T., Marsuura, R., Fukushi, K., Kurokawa, H., Yokoyama, T.
- Organizer
  Lunar and Planetary Science Conference, The Woodlands, USA (hybrid)
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-21KK0058
[Presentation] Distribution of rare-earth elements in fine-grained Calcium and Aluminum-rich inclusions from Allende meteorite.2022
- Author(s)
  Masuda, Y., Niki, S., Yokoyama, T., Hirata, T.
- Organizer
  Goldschmidt Conference, Hawaii, USA.
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] アエンデ隕石細粒CAIの核合成起源Ti同位体異常2022
- Author(s)
  増田雄樹、横山哲也、飯塚毅、日比谷由紀
- Organizer
  日本地球化学会2022年会, 高知大学
- Data Source
  KAKENHI-PROJECT-21KK0058
[Presentation] Hydrogen isotopic composition of water in Ryugu samples returned by the Hayabusa2 mission.2022
- Author(s)
  Piani, L., Marrocchi1, Y., Nagashima, K., Kawasaki, N., Sakamoto, N, Bajo, K., Yokoyama, T., et al.
- Organizer
  MetSoc, Glasgow, UK.
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] Multi-isotopic analyses of bulk Ryugu samples returned by the Hayabusa2 mission2022
- Author(s)
  Yokoyama, T., et al.
- Organizer
  Lunar and Planetary Science Conference, The Woodlands, USA (hybrid)
- Int'l Joint Research
- Data Source
  KAKENHI-PUBLICLY-20H04609
[Presentation] The isotopic variations in bulk-scale carbonaceous chondrites and the possible targets in the next sample return mission.2022
- Author(s)
  Fukai, R., Yokoyama, T., Arakawa, S., Homma, K., Okuzumi, S., Shimaki, Y.
- Organizer
  Goldschmidt Conference, Hawaii, USA.
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-21KK0058
[Presentation] Rare-earth element imaging of fine-grained calcium and aluminum-rich inclusions in Allende meteorite.2022
- Author(s)
  Masuda, Y., Niki, S., Yokoyama, T., Hirata, T.
- Organizer
  JpGU 2022, 幕張
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] 隕石の精密同位体分析に基づく銀河系化学進化とr核種の起源2022
- Author(s)
  横山哲也
- Organizer
  天の川銀河研究会２０２２
- Invited
- Data Source
  KAKENHI-PROJECT-18H01258
[Presentation] 隕石の精密同位体分析に基づく銀河系化学進化とr核種の起源2022
- Author(s)
  横山哲也
- Organizer
  天の川銀河研究会2022, 鹿児島大学
- Data Source
  KAKENHI-PROJECT-21KK0058
[Presentation] コロンビア, ゴルゴナ島に産する顕生代コマチアイトのマグマ源：オスミウム同位体不均質性からの考察2022
- Author(s)
  井原悠太、石川晃、清水健二、横山哲也
- Organizer
  JpGU 2022, 幕張
- Data Source
  KAKENHI-PROJECT-21KK0058
[Presentation] Simple and accurate determination of chalcophile and highly siderophile elements in carbonaceous chondrites using triple quadrupole ICP-MS.2022
- Author(s)
  Ishikawa, A., Nakano,S., Fujita, R., Yokoyama, T.
- Organizer
  Goldschmidt Conference, Hawaii, USA.
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-21KK0058
[Presentation] 元素の起源と地球化学2022
- Author(s)
  横山哲也
- Organizer
  放射化学討論会2022, 東京大学
- Invited
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] Origin of nucleosynthetic Sr isotope anomalies in fine grained calcium and aluminum-rich inclusions from Allende.2022
- Author(s)
  Masuda, Y., Yokoyama, T.
- Organizer
  Lunar and Planetary Science Conference, The Woodlands, USA (hybrid)
- Int'l Joint Research
- Data Source
  KAKENHI-PUBLICLY-20H04609
[Presentation] Progress of chemical characterization of asteroid Ryugu samples.2021
- Author(s)
  Yurimoto, H., Yokoyama, T., et al.
- Organizer
  Hayabusa Symposium 2021, Virtual
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] Development of multi-isotopic analyses of asteroid samples returned by the Hayabusa2 mission.2021
- Author(s)
  Yokoyama, T., Gautam, I., Ohkuma, Y., Iizuka, T., Horan, M.F., Carlson, R.W.
- Organizer
  Goldschmidt Conference, Virtual
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] 高精度Nd同位体比測定による平衡論的同位体効果の同定2021
- Author(s)
  深井稜汰, 若木重行, 横山哲也
- Organizer
  日本地球化学会2021年会
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] Progress of chemical characterization of asteroid Ryugu samples.2021
- Author(s)
  Yurimoto, H., Yokoyama, T., et al.
- Organizer
  Hayabusa Symposium 2021, Virtual
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-21KK0058
[Presentation] Progress of chemical characterization of asteroid Ryugu samples.2021
- Author(s)
  Yurimoto, H., Yokoyama, T., et al.
- Organizer
  Hayabusa Symposium 2021, Virtual
- Int'l Joint Research
- Data Source
  KAKENHI-PUBLICLY-20H04609
[Presentation] Highly siderophile element mobility during serpentinization of mantle wedge peridotite2021
- Author(s)
  Akira Ishikawa,Natsuki Nakamura,Tetsuya Yokoyama
- Organizer
  Goldschmdt Virtual 2021
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] 伊豆諸島火山岩のモリブデン同位体組成2021
- Author(s)
  田村達也、横山哲也、栗谷豪
- Organizer
  日本地球化学会2021年会
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] 高精度Nd同位体比測定による平衡論的同位体効果の同定2021
- Author(s)
  深井稜汰, 若木重行, 横山哲也
- Organizer
  日本地球化学会2021年会
- Data Source
  KAKENHI-PROJECT-18H01258
[Presentation] Development of a technique for multi-isotopic analyses of asteroid samples returned by the Hayabusa2 mission.2021
- Author(s)
  Yokoyama, T., Gautam, I., Ohkuma, Y., Iizuka, T.
- Organizer
  JpGU 2021, Virtual.
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] Highly siderophile elements behavior in the Paleoarchean Camel Creek komatiites from East Pilbara Terrane, Western Australia2021
- Author(s)
  Shun Nakano,Akira Ishikawa,Yuichiro Ueno,Tetsuya Yokoyama
- Organizer
  Goldschmidt Virutal 2021
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] Allende隕石中細粒CAIに見られる核合成起源のSr同位体異常の多様性2021
- Author(s)
  増田雄樹、横山哲也
- Organizer
  日本地球化学会2021年会
- Data Source
  KAKENHI-PROJECT-18H01258
[Presentation] Highly siderophile elements in Earth's oldest rocks from Acasta Gniess Complex, Canada: an impact melt origin or not?2021
- Author(s)
  石川晃,越田渓子,鈴木勝彦,横山哲也,小宮剛
- Organizer
  日本地球惑星科学連合2021年大会
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] Allende隕石中細粒CAIに見られる核合成起源のSr同位体異常の多様性2021
- Author(s)
  増田雄樹、横山哲也
- Organizer
  日本地球化学会2021年会
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] 高精度Nd同位体比測定による平衡論的同位体効果の同定2021
- Author(s)
  深井稜汰、若木重行、横山哲也
- Organizer
  日本地球化学会2021年会
- Data Source
  KAKENHI-PROJECT-18H01258
[Presentation] 小惑星サンプルリターン試料のマルチ同位体分析2021
- Author(s)
  横山哲也、 Ikshu Gautam、大熊悠介、飯塚毅
- Organizer
  質量分析討論会2021
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] Highly siderophile element mobility during serpentinization of mantle wedge peridotite2021
- Author(s)
  Akira Ishikawa, Natsuki Nakamura, Tetsuya Yokoyama
- Organizer
  Goldschmidt2021
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H01998
[Presentation] Development of Laser Ablation with Filter (LAF) sampling method for micro-scale isotopic analysis of geologic materials2020
- Author(s)
  Masuda, Y., Yokoyama, T., Okabayashi, S., Ishikawa, A.
- Organizer
  Goldschmidt Conference, On-line
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] Highly siderophile element mobility during serpentinization of forearc mantle peridotite2020
- Author(s)
  Nakamura, N., Ishikawa, A., Yokoyama, T.
- Organizer
  JpGU-AGU Joint meeting 2020, On-line
- Data Source
  KAKENHI-PUBLICLY-20H04609
[Presentation] コマチアイトの強親鉄性元素地球化学：マントル進化史の解明に向けて2020
- Author(s)
  中野隼, 石川晃, 上野雄一郎, 横山哲也
- Organizer
  JpGU-AGU Joint Meeting
- Data Source
  KAKENHI-PROJECT-19H01998
[Presentation] 10＾13Ω抵抗付増幅器を使用したTE-DS-TIMSによる極微量鉛同位体分析における時定数補正について2020
- Author(s)
  深海雄介、飛田南斗、横山哲也、鈴木勝彦
- Organizer
  日本地球化学会年会、オンライン
- Data Source
  KAKENHI-PUBLICLY-20H04609
[Presentation] Assessment of the effect of mass-dependent fractionation on 142Nd compositions in Archean rocks2020
- Author(s)
  Fukai, R., Asanuma, H., Komiya, T., Yokoyama, T., Hirata, T.
- Organizer
  Goldschmidt Conference, On-line
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] Small-scale isotopic analysis of geological materials using the Laser Ablation with Filter (LAF) sampling method2020
- Author(s)
  Masuda, Y., Yokoyama, T., Okabayashi, S., Ishikawa, A.
- Organizer
  JpGU-AGU Joint meeting 2020, On-line
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] 隕石の重元素同位体異常にまつわる最近の話題2020
- Author(s)
  横山哲也
- Organizer
  研究会「星の錬金術から銀河考古学へ」
- Invited
- Data Source
  KAKENHI-PROJECT-19H01998
[Presentation] Small-scale isotopic analysis of geological materials using the Laser Ablation with Filter (LAF) sampling method2020
- Author(s)
  Masuda, Y., Yokoyama, T., Okabayashi, S., Ishikawa, A.
- Organizer
  JpGU-AGU Joint meeting 2020, On-line
- Data Source
  KAKENHI-PUBLICLY-20H04609
[Presentation] Origin of Hawaiian mantle xenoliths: fragments of mantle plume?2020
- Author(s)
  Fujita, R., Ishikawa, A., Yokoyama, T., Garcia, M.O.
- Organizer
  Goldschmidt Conference, On-line
- Int'l Joint Research
- Data Source
  KAKENHI-PUBLICLY-20H04609
[Presentation] No impact signatures in Earth’s oldest rocks from Acasta Gneiss Complex, Canada2020
- Author(s)
  Ishikawa, A., Koshida, K., Suzuki, K., Yokoyama, T., Komiya, T.
- Organizer
  Goldschmidt Conference, On-line
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] Assessment of the effect of mass-dependent fractionation on 142Nd compositions in Archean rocks2020
- Author(s)
  Fukai, R., Asanuma, H., Komiya, T., Yokoyama, T., Hirata, T.
- Organizer
  Goldschmidt Conference, On-line
- Int'l Joint Research
- Data Source
  KAKENHI-PUBLICLY-20H04609
[Presentation] 隕石の重元素同位体異常にまつわる最近の話題2020
- Author(s)
  横山哲也
- Organizer
  研究会「星の錬金術から銀河考古学へ」、オンライン
- Invited
- Data Source
  KAKENHI-PUBLICLY-20H04609
[Presentation] Development of Laser Ablation with Filter (LAF) Sampling Method for Micro-Scale Isotopic Analysis of Geologic Materials2020
- Author(s)
  Yuki Masuda, Tetsuya Yokoyama, Satoki Okabayashi, Akira Ishikawa
- Organizer
  Goldschmidt Conference
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H01998
[Presentation] Highly siderophile element mobility during serpentinization of forearc mantle peridotite2020
- Author(s)
  Natuski Nakamura, Akira Ishikawa, Tetsuya Yokoyama
- Organizer
  JpGU-AGU Joint Meeting
- Data Source
  KAKENHI-PROJECT-19H01998
[Presentation] Lead Isotope Analysis for Picogram Size Samples by TE-DS-TIMS using Amplifier equipped with 10^13 Ohm Resistor2020
- Author(s)
  Fukami, Y., Tobita, M., Yokoyama, T., Suzuki, K.
- Organizer
  Goldschmidt Conference
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H01998
[Presentation] Origin and evolution of distinct isotopic variabilities for Sr, Mo, and Nd within CC and NC reservoirs (Keynote Talk)2020
- Author(s)
  Yokoyama, T., Fukai, R., Nagai, Y., Hirata, T.
- Organizer
  Goldschmidt Conference, On-line
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] Origin and evolution of distinct isotopic variabilities for Sr, Mo, and Nd within inner and outer solar system2020
- Author(s)
  Yokoyama, T., Fukai, R., Nagai, Y., Hirata, T.
- Organizer
  JpGU-AGU Joint meeting
- Data Source
  KAKENHI-PROJECT-18H01258
[Presentation] ハワイ諸島産マントル捕獲岩の全岩オスミウム同位体と強親鉄性元素組成2020
- Author(s)
  藤田遼, 石川晃, 横山哲也, Michael Garcia
- Organizer
  JpGU-AGU Joint Meeting
- Data Source
  KAKENHI-PROJECT-19H01998
[Presentation] Origin and evolution of distinct isotopic variabilities for Sr, Mo, and Nd within inner and outer solar system2020
- Author(s)
  Yokoyama, T., Fukai, R., Nagai, Y., Hirata, T.
- Organizer
  JpGU-AGU Joint meeting 2020, On-line
- Data Source
  KAKENHI-PUBLICLY-20H04609
[Presentation] 隕石の重元素同位体異常にまつわる最近の話題2020
- Author(s)
  横山哲也
- Organizer
  研究会「星の錬金術から銀河考古学へ」
- Invited
- Data Source
  KAKENHI-PROJECT-18H01258
[Presentation] Recent progress in the application of nucleosynthetic isotope anomalies in meteorites2020
- Author(s)
  Yokoyama, T.
- Organizer
  ISAS Colloquium
- Invited
- Data Source
  KAKENHI-PROJECT-19H01998
[Presentation] Origin and evolution of distinct isotopic variabilities for Sr, Mo, and Nd within CC and NC reservoirs (Keynote Talk)2020
- Author(s)
  Yokoyama, T., Fukai, R., Nagai, Y., Hirata, T.
- Organizer
  Goldschmidt Conference
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-18H01258
[Presentation] 神津島流紋岩及び玄武岩質捕獲岩の地球化学的研究2020
- Author(s)
  田村達也、横山哲也、石川晃
- Organizer
  JpGU-AGU Joint meeting 2020, On-line
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] Origin and evolution of distinct isotopic variabilities for Sr, Mo, and Nd within CC and NC reservoirs2020
- Author(s)
  Yokoyama, T., Fukai, R., Nagai, Y., Hirata, T.
- Organizer
  Goldschmidt Conference
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H01998
[Presentation] 神津島流紋岩及び玄武岩質捕獲岩の地球化学的研究2020
- Author(s)
  田村達也、横山哲也、石川晃
- Organizer
  JpGU-AGU Joint meeting 2020, On-line
- Data Source
  KAKENHI-PUBLICLY-20H04609
[Presentation] Lead Isotope Analysis for Picogram Size Samples by TE-DS-TIMS using Amplifier equipped with 10^13 Ohm Resistor2020
- Author(s)
  Fukami, Y., Tobita, M., Yokoyama, T., Suzuki, K.
- Organizer
  Goldschmidt Conference, On-line
- Int'l Joint Research
- Data Source
  KAKENHI-PUBLICLY-20H04609
[Presentation] Sulfur species in ALH 84001 carbonates constrain conditions of liquid water on ancient Mars.2020
- Author(s)
  Kajitani, I., Nakada, R., Koike, M., Tanabe, G., Usui, T., Matsu'ura, F., Fukushi, K., Yokoyama, T.
- Organizer
  Lunar and Planetary Science Conference, The Woodlands, USA.
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] Sulfur species in ALH 84001 carbonates constrain conditions of liquid water on ancient Mars.2020
- Author(s)
  Kajitani, I., Nakada, R., Koike, M., Tanabe, G., Usui, T., Matsu'ura, F., Fukushi, K., Yokoyama, T.
- Organizer
  Lunar and Planetary Science Conference, The Woodlands, USA.
- Int'l Joint Research
- Data Source
  KAKENHI-PUBLICLY-18H04457
[Presentation] Highly siderophile element mobility during serpentinization of forearc mantle peridotite2020
- Author(s)
  Nakamura, N., Ishikawa, A., Yokoyama, T.
- Organizer
  JpGU-AGU Joint meeting 2020, On-line
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] Origin and evolution of distinct isotopic variabilities for Sr, Mo, and Nd within inner and outer solar system2020
- Author(s)
  Yokoyama, T., Fukai, R., Nagai, Y., Hirata, T.
- Organizer
  JpGU-AGU Joint meeting 2020, On-line
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] 10＾13Ω抵抗付増幅器を使用したTE-DS-TIMSによる極微量鉛同位体分析における時定数補正について2020
- Author(s)
  深海雄介、飛田南斗、横山哲也、鈴木勝彦
- Organizer
  日本地球化学会年会、オンライン
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] Highly siderophile geochemistry of komatiites from Pilbara Craton, Western Australia2020
- Author(s)
  Nakano. S., Ishikawa, A., Ueno, Y., Yokoyama, T.
- Organizer
  JpGU-AGU Joint meeting 2020, On-line
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] 10^13Ω抵抗付増幅器を使用したTE-DS-TIMSによる極微量鉛同位体分析における時定数補正について2020
- Author(s)
  深海雄介、飛田南斗、横山哲也、鈴木勝彦
- Organizer
  日本地球化学会年会
- Data Source
  KAKENHI-PROJECT-19H01998
[Presentation] Assessment of the effect of mass-dependent fractionation on 142Nd compositions in Archean rocks2020
- Author(s)
  Fukai, R., Asanuma, H., Komiya, T., Yokoyama, T., Hirata, T.
- Organizer
  Goldschmidt Conference
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H01998
[Presentation] Sulfur species in carbonates of a 4.1-billion-year old Martian meteorite constraining conditions of water on ancient Mars2020
- Author(s)
  Kajitani, I., Nakada, R., Koike, M., Tanabe, G., Usui, T., Matsu'ura, F., Fukushi, K., Yokoyama, T.
- Organizer
  JpGU-AGU Joint meeting 2020, On-line
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] Recent progress in the application of nucleosynthetic isotope anomalies in meteorites2020
- Author(s)
  Yokoyama, T.
- Organizer
  ISAS Colloquium, on-line
- Invited
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] Sulfur species in carbonates of a 4.1-billion-year old Martian meteorite constraining conditions of water on ancient Mars2020
- Author(s)
  Kajitani, I., Nakada, R., Koike, M., Tanabe, G., Usui, T., Matsu'ura, F., Fukushi, K., Yokoyama, T.
- Organizer
  JpGU-AGU Joint meeting 2020, On-line
- Data Source
  KAKENHI-PUBLICLY-20H04609
[Presentation] Lead Isotope Analysis for Picogram Size Samples by TE-DS-TIMS using Amplifier equipped with 10^13 Ohm Resistor2020
- Author(s)
  Fukami, Y., Tobita, M., Yokoyama, T., Suzuki, K.
- Organizer
  Goldschmidt Conference, On-line
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] Sulfur species in ALH 84001 carbonates constrain conditions of liquid water on ancient Mars.2020
- Author(s)
  Kajitani, I., Nakada, R., Koike, M., Tanabe, G., Usui, T., Matsu'ura, F., Fukushi, K., Yokoyama, T.
- Organizer
  Lunar and Planetary Science Conference, The Woodlands, USA.
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H01998
[Presentation] Origin of Hawaiian mantle xenoliths: fragments of mantle plume?2020
- Author(s)
  Fujita, R., Ishikawa, A., Yokoyama, T., Garcia, M.O.
- Organizer
  Goldschmidt Conference, On-line
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] No Impact Signatures in Earth's Oldest Rocks from Acasta Gneiss Complex, Canada2020
- Author(s)
  Akira Ishikawa, Keiko Koshida, Katsuhiko Suzuki, Tetsuya Yokoyama, Tsuyoshi Komiya
- Organizer
  Goldschmidt Conference
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H01998
[Presentation] Recent progress in the application of nucleosynthetic isotope anomalies in meteorites2020
- Author(s)
  Yokoyama, T.
- Organizer
  ISAS Colloquium
- Invited
- Data Source
  KAKENHI-PROJECT-18H01258
[Presentation] ハワイ諸島産マントル捕獲岩の全岩オスミウム同位体と強親鉄性元素組成2020
- Author(s)
  藤田遼, 石川晃, 横山哲也, Michael Garcia
- Organizer
  JpGU-AGU Joint meeting 2020, On-line
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] 神津島流紋岩及び玄武岩質捕獲岩の地球化学的研究2020
- Author(s)
  田村達也, 横山哲也, 石川晃
- Organizer
  JpGU-AGU Joint Meeting
- Data Source
  KAKENHI-PROJECT-19H01998
[Presentation] 隕石の重元素同位体異常にまつわる最近の話題2020
- Author(s)
  横山哲也
- Organizer
  研究会「星の錬金術から銀河考古学へ」、オンライン
- Invited
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] No impact signatures in Earth’s oldest rocks from Acasta Gneiss Complex, Canada2020
- Author(s)
  Ishikawa, A., Koshida, K., Suzuki, K., Yokoyama, T., Komiya, T.
- Organizer
  Goldschmidt Conference, On-line
- Int'l Joint Research
- Data Source
  KAKENHI-PUBLICLY-20H04609
[Presentation] Development of Laser Ablation with Filter (LAF) sampling method for micro-scale isotopic analysis of geologic materials2020
- Author(s)
  Masuda, Y., Yokoyama, T., Okabayashi, S., Ishikawa, A.
- Organizer
  Goldschmidt Conference, On-line
- Int'l Joint Research
- Data Source
  KAKENHI-PUBLICLY-20H04609
[Presentation] Ancient Origin of Hawaiian Xenoliths: Fragments of Mantle Plume?2020
- Author(s)
  Ryo Fujita, Akira Ishikawa, Tetsuya Yokoyama, Michael O. Garcia
- Organizer
  Goldschmidt Conference
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H01998
[Presentation] Highly siderophile geochemistry of komatiites from Pilbara Craton, Western Australia2020
- Author(s)
  Nakano. S., Ishikawa, A., Ueno, Y., Yokoyama, T.
- Organizer
  JpGU-AGU Joint meeting 2020, On-line
- Data Source
  KAKENHI-PUBLICLY-20H04609
[Presentation] Origin and evolution of distinct isotopic variabilities for Sr, Mo, and Nd within CC and NC reservoirs (Keynote Talk)2020
- Author(s)
  Yokoyama, T., Fukai, R., Nagai, Y., Hirata, T.
- Organizer
  Goldschmidt Conference, On-line
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PUBLICLY-20H04609
[Presentation] Recent progress in the application of nucleosynthetic isotope anomalies in meteorites2020
- Author(s)
  Yokoyama, T.
- Organizer
  ISAS Colloquium, on-line
- Invited
- Data Source
  KAKENHI-PUBLICLY-20H04609
[Presentation] 10＾13Ω抵抗付増幅器を使用したTE-DS-TIMSによる極微量鉛同位体分析手法の開発2019
- Author(s)
  深海雄介、飛田南斗、横山哲也、鈴木勝彦
- Organizer
  日本地球化学会年会、東京
- Data Source
  KAKENHI-PUBLICLY-18H04457
[Presentation] Meteoritical perspective on the origin of r-process nuclides in the Solar System2019
- Author(s)
  Yokoyama, T., Fukai, R., Tsujimoto, T.
- Organizer
  3rd Korea-Japan Joint Workshop on Isotope-Ratio Mass Spectrometry
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PLANNED-26106002
[Presentation] Allende隕石中の難揮発性包有物にみられる核合成起源のSr同位体異常2019
- Author(s)
  増田雄樹、横山哲也、明星邦弘
- Organizer
  日本地球化学学会第66回年会、東京
- Data Source
  KAKENHI-PROJECT-19H01998
[Presentation] Allende隕石中の難揮発性包有物にみられる核合成起源のSr同位体異常2019
- Author(s)
  増田雄樹、横山哲也、明星邦弘
- Organizer
  日本地球化学会年会、東京
- Data Source
  KAKENHI-PUBLICLY-18H04457
[Presentation] Origin of mantle xenoliths from Kaula Island, Hawaii:Constrains from Os isotope and highly siderophile element compositions2019
- Author(s)
  Fujita, R., Ishikawa, A., Yokoyama, T., Garcia, M. O.
- Organizer
  JpGU 2019, Makuhari, Japan
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] Chemically defining the building blocks of the Earth.2019
- Author(s)
  Yoshizaki, T., Ash, R., Yokoyama, T., Lipella, M., McDonough, W.F.
- Organizer
  Goldschmidt Conference, Barcelona, Spain
- Int'l Joint Research
- Data Source
  KAKENHI-PUBLICLY-18H04457
[Presentation] Finding of oxidized sulfur species in carbonates from a Martian meteorite Allan Hills 84001 using μ-XANES2019
- Author(s)
  Kajitani, I., Tanage, G., Nakada, Usui, T., R., Koike, M., Matsu'ura, F., Yokoyama, T.
- Organizer
  JpGU 2019, Makuhari, Japan
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] Nucleosynthetic Sr and Nd isotopic anomalies of bulk differentiated meteorites2019
- Author(s)
  Fukai, R., Sugimoto, K., Yokoyama, T.
- Organizer
  Goldschmidt Conference
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-18H01258
[Presentation] Iron isotopic compositions of Luna 16, 20, 24 soils2019
- Author(s)
  Okabayashi, S., Yokoyama, T., Hirata, T., Terakado, K., Galimov, E.
- Organizer
  JpGU 2019, Makuhari, Japan
- Invited
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] Preliminary analysis of nucleosynthetic Sr isotope anomalies in amoeboid olivine aggregates from the Allende meteorite2019
- Author(s)
  Masuda, Y., Yokoyama, T., Myojo, K., Okabayashi, S.
- Organizer
  JpGU 2019, Makuhari, Japan
- Data Source
  KAKENHI-PROJECT-19H01998
[Presentation] Iron isotopic compositions of Luna 16, 20, 24 soils2019
- Author(s)
  Okabayashi, S., Yokoyama, T., Hirata, T., Terakado, K., Galimov, E.
- Organizer
  JpGU 2019, Makuhari, Japan
- Invited
- Data Source
  KAKENHI-PUBLICLY-18H04457
[Presentation] Separation of heavy lanthanoids by flash column chromatography for precise determination of Er and Yb isotope compositions in rock samples.2019
- Author(s)
  Yokoyama, T.
- Organizer
  4th China-Japan Joint Forum on Geochemistry and Cosmochemistry, Hangzhou, China
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PUBLICLY-18H04457
[Presentation] Nucleosynthetic Sr and Nd isotopic anomalies of bulk differentiated meteorites2019
- Author(s)
  Fukai, R., Sugimoto, K., Yokoyama, T.
- Organizer
  JpGU 2019, Makuhari, Japan
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] Nucleosynthetic strontium-neodymium isotope correlation in chondrites: Evidence for nebular thermal processing and dust transportation in the early solar system.2019
- Author(s)
  Fukai, R., Yokoyama, T.
- Organizer
  Lunar and Planetary Science Conference
- Int'l Joint Research
- Data Source
  KAKENHI-PLANNED-26106002
[Presentation] Chemically defining the building blocks of the Earth.2019
- Author(s)
  Yoshizaki, T., Ash, R., Yokoyama, T., Lipella, M., McDonough, W.F.
- Organizer
  Goldschmidt Conference, Barcelona, Spain
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] Molybdenum isotopic evidence for nebular thermal processing and material transportation in the inner solar system.2019
- Author(s)
  Yokoyama, T., Fukai, R., Tsujimoto, T.
- Organizer
  Lunar and Planetary Science Conference
- Int'l Joint Research
- Data Source
  KAKENHI-PLANNED-26106002
[Presentation] New genesis of felsic magma: the unmixing of slab-derived supercritical liquid.2019
- Author(s)
  Taniuchi, H., Kuritani, T., Yokoyama, T., Nakamura, E.
- Organizer
  AGU fall meeting, San Francisco, USA
- Int'l Joint Research
- Data Source
  KAKENHI-PUBLICLY-18H04457
[Presentation] Hydrous felsic magma generated by unmixing of slab-derived supercritical liquid: evidence from Rishiri Volcano, Kuril Arc2019
- Author(s)
  Taniuchi, H., Kuritani, T., Yokoyama, T., Nakamura, E., Nakagawa, M.
- Organizer
  JpGU 2019, Makuhari, Japan
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] Preliminary analysis of nucleosynthetic Sr isotope anomalies in amoeboid olivine aggregates from the Allende meteorite2019
- Author(s)
  Masuda, Y., Yokoyama, T., Myojo, K., Okabayashi, S.
- Organizer
  JpGU 2019, Makuhari, Japan
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] Evaluation of digestion methods for Molybdenum concentration analysis for geological materials2019
- Author(s)
  Mutsushika, Y., Ishikawa, A., Yokoyama, T.
- Organizer
  JpGU 2019, Makuhari, Japan
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] Nucleosynthetic Sr and Nd isotopic anomalies of bulk differentiated meteorites2019
- Author(s)
  Fukai, R., Sugimoto, K., Yokoyama, T.
- Organizer
  JpGU 2019
- Data Source
  KAKENHI-PROJECT-18H01258
[Presentation] Molybdenum isotopic evidence for nebular thermal processing and material transportation in the inner solar system2019
- Author(s)
  Yokoyama T.、 Fukai R.、 Tsujimoto T.
- Organizer
  Lunar and Planetary Science Conference
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-18H01258
[Presentation] Nucleosynthetic strontium-neodymium isotope correlation in chondrites: Evidence for nebular thermal processing and dust transportation in the early solar system2019
- Author(s)
  Fukai, R., Yokoyama, T.
- Organizer
  50th Lunar and Planetary Science Conference
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26220713
[Presentation] Nucleosynthetic Sr and Nd isotopic anomalies of bulk differentiated meteorites2019
- Author(s)
  Fukai, R., Sugimoto, K., Yokoyama, T.
- Organizer
  Goldschmidt Conference, Barcelona, Spain
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] Noble gas isotopic compositions of four Stannern-group euncirtes.2019
- Author(s)
  Kagami, S., Haba, M.K., Nagao, K., Yokoyama, T., Yamaguchi, A.
- Organizer
  Lunar and Planetary Science Conference
- Int'l Joint Research
- Data Source
  KAKENHI-PLANNED-26106002
[Presentation] 10＾13Ω抵抗付増幅器を使用したTE-DS-TIMSによる極微量鉛同位体分析手法の開発2019
- Author(s)
  深海雄介、飛田南斗、横山哲也、鈴木勝彦
- Organizer
  日本地球化学学会第66回年会、東京
- Data Source
  KAKENHI-PROJECT-19H01998
[Presentation] Noble gas isotopic compositions of four Stannern-group euncirtes2019
- Author(s)
  Kagami, S., Haba, M.K., Nagao, K., Yokoyama, T., Yamaguchi, A.
- Organizer
  50th Lunar and Planetary Science Conference
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26220713
[Presentation] Thermal histories of metal phases in CH/CBb chondrite Isheyevo: Implications from siderophile elements2019
- Author(s)
  Nakanishi, N., Yokoyama, T., Okabayashi, S., Iwamori, H.
- Organizer
  50th Lunar and Planetary Science Conference
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26220713
[Presentation] Finding of oxidized sulfur species in carbonates from a Martian meteorite Allan Hills 84001 using μ-XANES2019
- Author(s)
  Kajitani, I., Tanage, G., Nakada, Usui, T., R., Koike, M., Matsu'ura, F., Yokoyama, T.
- Organizer
  JpGU 2019, Makuhari, Japan
- Data Source
  KAKENHI-PUBLICLY-18H04457
[Presentation] Allende隕石中の難揮発性包有物にみられる核合成起源のSr同位体異常2019
- Author(s)
  増田雄樹、横山哲也、明星邦弘
- Organizer
  日本地球化学会年会、東京
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] Molybdenum isotopic evidence for nebular thermal processing and material transportation in the inner solar system2019
- Author(s)
  Yokoyama, T., Fukai, R., Tsujimoto, T.
- Organizer
  50th Lunar and Planetary Science Conference
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26220713
[Presentation] Hydrous felsic magma generated by unmixing of slab-derived supercritical liquid: evidence from Rishiri Volcano, Kuril Arc2019
- Author(s)
  Taniuchi, H., Kuritani, T., Yokoyama, T., Nakamura, E., Nakagawa, M.
- Organizer
  JpGU 2019, Makuhari, Japan
- Data Source
  KAKENHI-PROJECT-19H01998
[Presentation] Geochemistry and chronology of five howardites, Y-7308, Y-003125, Y-000428, NWA 1929, and NWA 69202019
- Author(s)
  Okada, M., Haba, M.K., Nagao, K., Yokoyama, T.
- Organizer
  JpGU 2019, Makuhari, Japan
- Data Source
  KAKENHI-PROJECT-19H01998
[Presentation] New genesis of felsic magma: the unmixing of slab-derived supercritical liquid.2019
- Author(s)
  Taniuchi, H., Kuritani, T., Yokoyama, T., Nakamura, E.
- Organizer
  AGU fall meeting, San Francisco, USA
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] Preliminary analysis of nucleosynthetic Sr isotope anomalies in amoeboid olivine aggregates from the Allende meteorite2019
- Author(s)
  Masuda, Y., Yokoyama, T., Myojo, K., Okabayashi, S.
- Organizer
  JpGU 2019, Makuhari, Japan
- Data Source
  KAKENHI-PUBLICLY-18H04457
[Presentation] オスミウム同位体組成と強親鉄性元素組成からみたハワイ諸島産マントル捕獲岩の起源2019
- Author(s)
  藤田遼、石川晃、横山哲也、Michael Garcia
- Organizer
  日本質量分析学会同位体比部会、登別
- Data Source
  KAKENHI-PROJECT-19H01998
[Presentation] オスミウム同位体と強親鉄性元素組成からみたハワイ諸島、カウラ島産マントル捕獲岩の起源2019
- Author(s)
  藤田遼、石川晃、横山哲也、Michael Garcia
- Organizer
  日本地球惑星科学連合2019年大会、幕張
- Data Source
  KAKENHI-PROJECT-19H01998
[Presentation] Geochemistry and chronology of five howardites, Y-7308, Y-003125, Y-000428, NWA 1929, and NWA 69202019
- Author(s)
  Okada, M., Haba, M.K., Nagao, K., Yokoyama, T.
- Organizer
  JpGU 2019, Makuhari, Japan
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] Separation of heavy lanthanoids by flash column chromatography for precise determination of Er and Yb isotope compositions in rock samples.2019
- Author(s)
  Yokoyama, T.
- Organizer
  4th China-Japan Joint Forum on Geochemistry and Cosmochemistry, Hangzhou, China
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] New genesis of felsic magma: the unmixing of slab-derived supercritical liquid.2019
- Author(s)
  Taniuchi, H., Kuritani, T., Yokoyama, T., Nakamura, E.
- Organizer
  AGU fall meeting,
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H01998
[Presentation] Chemically defining the building blocks of the Earth.2019
- Author(s)
  Yoshizaki, T., Ash, R., Yokoyama, T., Lipella, M., McDonough, W.F.
- Organizer
  Goldschmidt Conference, Barcelona, Spain
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H01998
[Presentation] Separation of heavy lanthanoids by flash column chromatography for precise determination of Er and Yb isotope compositions in rock samples2019
- Author(s)
  Yokoyama, T.
- Organizer
  4th China-Japan Joint Forum on Geochemistry and Cosmochemistry
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-18H01258
[Presentation] Separation of heavy lanthanoids by flash column chromatography for precise determination of Er and Yb isotope compositions in rock samples.2019
- Author(s)
  Yokoyama, T.
- Organizer
  4th China-Japan Joint Forum on Geochemistry and Cosmochemistry, Hangzhou, China
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H01998
[Presentation] 10＾13Ω抵抗付増幅器を使用したTE-DS-TIMSによる極微量鉛同位体分析手法の開発2019
- Author(s)
  深海雄介、飛田南斗、横山哲也、鈴木勝彦
- Organizer
  日本地球化学会年会、東京
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] Evaluation of digestion methods for Molybdenum concentration analysis for geological materials2019
- Author(s)
  六鹿悠,石川晃,横山哲也
- Organizer
  日本地球惑星科学連合2019年大会
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] Evaluation of digestion methods for Molybdenum concentration analysis for geological materials2019
- Author(s)
  Mutsushika, Y., Ishikawa, A., Yokoyama, T.
- Organizer
  JpGU 2019, Makuhari, Japan
- Data Source
  KAKENHI-PUBLICLY-18H04457
[Presentation] Finding of oxidized sulfur species in carbonates from a Martian meteorite Allan Hills 84001 using μ-XANES2019
- Author(s)
  Kajitani, I., Tanage, G., Nakada, Usui, T., R., Koike, M., Matsu'ura, F., Yokoyama, T.
- Organizer
  JpGU 2019, Makuhari, Japan
- Data Source
  KAKENHI-PROJECT-19H01998
[Presentation] Iron isotopic compositions of Luna 16, 20, 24 soils2019
- Author(s)
  Okabayashi, S., Yokoyama, T., Hirata, T., Terakado, K., Galimov, E.
- Organizer
  JpGU 2019, Makuhari, Japan
- Invited
- Data Source
  KAKENHI-PROJECT-19H01998
[Presentation] Origin of mantle xenoliths from Kaula Island, Hawaii:Constrains from Os isotope and highly siderophile element compositions2019
- Author(s)
  Fujita, R., Ishikawa, A., Yokoyama, T., Garcia, M. O.
- Organizer
  JpGU 2019, Makuhari, Japan
- Data Source
  KAKENHI-PUBLICLY-18H04457
[Presentation] オスミウム同位体と強親鉄性元素組成からみたハワイ諸島、カウラ島産マントル捕獲岩の起源2019
- Author(s)
  藤田遼,石川晃,横山哲也,Michael Garcia
- Organizer
  日本地球惑星科学連合2019年大会
- Data Source
  KAKENHI-PROJECT-19H00715
[Presentation] Thermal histories of metal phases in CH/CBb chondrite Isheyevo: Implications from siderophile elements.2019
- Author(s)
  Nakanishi, N., Yokoyama, T., Okabayashi, S., Iwamori, H.
- Organizer
  Lunar and Planetary Science Conference
- Int'l Joint Research
- Data Source
  KAKENHI-PLANNED-26106002
[Presentation] Nucleosynthetic Sr and Nd isotopic anomalies of bulk differentiated meteorites2019
- Author(s)
  Fukai, R., Sugimoto, K., Yokoyama, T.
- Organizer
  Goldschmidt Conference, Barcelona, Spain
- Int'l Joint Research
- Data Source
  KAKENHI-PUBLICLY-18H04457
[Presentation] Evaluation of digestion methods for Molybdenum concentration analysis for geological materials2019
- Author(s)
  Mutsushika, Y., Ishikawa, A., Yokoyama, T.
- Organizer
  JpGU 2019, Makuhari, Japan
- Data Source
  KAKENHI-PROJECT-19H01998
[Presentation] Nucleosynthetic Sr and Nd isotopic anomalies of bulk differentiated meteorites2019
- Author(s)
  Fukai, R., Sugimoto, K., Yokoyama, T.
- Organizer
  Goldschmidt Conference, Barcelona, Spain
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19H01998
[Presentation] Geochemistry and chronology of five howardites, Y-7308, Y-003125, Y-000428, NWA 1929, and NWA 69202019
- Author(s)
  Okada, M., Haba, M.K., Nagao, K., Yokoyama, T.
- Organizer
  JpGU 2019, Makuhari, Japan
- Data Source
  KAKENHI-PUBLICLY-18H04457
[Presentation] Nucleosynthetic Sr and Nd isotopic anomalies of bulk differentiated meteorites2019
- Author(s)
  Fukai, R., Sugimoto, K., Yokoyama, T.
- Organizer
  JpGU 2019, Makuhari, Japan
- Data Source
  KAKENHI-PUBLICLY-18H04457
[Presentation] Origin of mantle xenoliths from Kaula Island, Hawaii:Constrains from Os isotope and highly siderophile element compositions2019
- Author(s)
  Fujita, R., Ishikawa, A., Yokoyama, T., Garcia, M. O.
- Organizer
  JpGU 2019, Makuhari, Japan
- Data Source
  KAKENHI-PROJECT-19H01998
[Presentation] Molybdenum isotopic evidence for nebular thermal processing and material transportation in the inner solar system2019
- Author(s)
  Yokoyama, T., Fukai, R., Tsujimoto, T.
- Organizer
  Lunar and Planetary Science Conference
- Int'l Joint Research
- Data Source
  KAKENHI-PUBLICLY-18H04457
[Presentation] Hydrous felsic magma generated by unmixing of slab-derived supercritical liquid: evidence from Rishiri Volcano, Kuril Arc2019
- Author(s)
  Taniuchi, H., Kuritani, T., Yokoyama, T., Nakamura, E., Nakagawa, M.
- Organizer
  JpGU 2019, Makuhari, Japan
- Data Source
  KAKENHI-PUBLICLY-18H04457
[Presentation] Molybdenum isotopic evidence for nebular thermal processing and material transportation in the inner solar system.2019
- Author(s)
  Yokoyama, T., Fukai, R., Tsujimoto, T.
- Organizer
  Lunar and Planetary Science Conference
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16H04081
[Presentation] Evaluation of digestion methods for molybdenum concentration analysis for geological materials2019
- Author(s)
  六鹿悠、石川晃、横山哲也
- Organizer
  日本地球惑星科学連合2019年大会、幕張
- Data Source
  KAKENHI-PROJECT-19H01998
[Presentation] Nucleosynthetic Sr and Nd isotopic anomalies of bulk differentiated meteorites2019
- Author(s)
  Fukai, R., Sugimoto, K., Yokoyama, T.
- Organizer
  JpGU 2019, Makuhari, Japan
- Data Source
  KAKENHI-PROJECT-19H01998
[Presentation] Nucleosynthetic strontium-neodymium isotope correlation in chondrites: Evidence for nebular thermal processing and dust transportation in the early solar system2019
- Author(s)
  Fukai R.、 Yokoyama T.
- Organizer
  Lunar and Planetary Science Conference
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-18H01258
[Presentation] 76Lu-176Hf, 147Sm-143Nd同位体系から探るアカスタ片麻岩体苦鉄質岩の形成年代2018
- Author(s)
  越田渓子, 石川晃, 横山哲也, 鏡味沙耶, 深井稜汰, 鈴木勝彦, 木村純一, 常青, 宮崎隆, Bogdan, S.V., 小宮剛
- Organizer
  2018年度日本地球化学会年会
- Data Source
  KAKENHI-PROJECT-26220713
[Presentation] Meteoritical perspective on the origin of r-process nuclides in the Solar System2018
- Author(s)
  Yokoyama, T., Fukai, R., Tsujimoto, T.
- Organizer
  3rd Korea-Japan Joint Workshop on Isotope-Ratio Mass Spectrometry
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PUBLICLY-18H04457
[Presentation] Meteoritical perspective on the origin of r-process nuclides in the Solar System2018
- Author(s)
  Yokoyama, T., Fukai, R., Tsujimoto, T.
- Organizer
  3rd Korea-Japan Joint Workshop on Isotope-Ratio Mass Spectrometry
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26220713
[Presentation] Nucleosynthetic- Nd correlation in bulk chondrites: Evidence for nebular thermal processing and transportation of refractory dusts in the early Solar System.2018
- Author(s)
  Fukai, R., Yokoyama, T.
- Organizer
  Goldschmidt Conference
- Int'l Joint Research
- Data Source
  KAKENHI-PLANNED-26106002
[Presentation] Formation of Metal Phases in CR Chondrites: Implications from Highly Siderophile Elements2018
- Author(s)
  Nakanishi, N., Yokoyama, T., Okabayashi, S., Iwamori, H
- Organizer
  Lunar and Planetary Science Conference
- Data Source
  KAKENHI-PROJECT-16H04081
[Presentation] Geochemistry, Petrology, and Sm-Nd Dating of a Stannern Group Eucrite, Northwest Africa 71882018
- Author(s)
  Kagami, S., Haba, M.K., Yokoyama, T., Usui, T., Greenwood, R.C.
- Organizer
  Lunar and Planetary Science Conference
- Data Source
  KAKENHI-PROJECT-16H04081
[Presentation] Petrogenesis of a unique shergottite Zagami: Implications from REE signature of pyroxene2018
- Author(s)
  Tobita, M., Makino, Y., Okabayashi, S., Usui, T., Niihara, T., Misawa, K., Hirata, T., Yokoyama, T. Moriwaki, R.
- Organizer
  Goldschmidt Conference 2018
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26220713
[Presentation] Meteoritical perspective on the origin of r-process nuclides in the Solar System2018
- Author(s)
  Yokoyama, T., Fukai, R., Tsujimoto, T.
- Organizer
  3rd Korea-Japan Joint Workshop on Isotope-Ratio Mass Spectrometry
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16H04081
[Presentation] Experimental study on relationship between permeability and transport pore radius of sandstone2018
- Author(s)
  K. Sueyoshi, T. Yokoyama, I. Katayama, Y.
- Organizer
  American Geophysical Union, Fall Meeting
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26220713
[Presentation] Meteoritical Perspective on the Origin of r-Process Nuclides in the Solar System2018
- Author(s)
  Yokoyama, T., Fukai, R., Tsujimoto, T.
- Organizer
  Lunar and Planetary Science Conference
- Data Source
  KAKENHI-PROJECT-16H04081
[Presentation] Meteoritical Perspective on the Origin of r-Process Nuclides in the Solar System2018
- Author(s)
  Yokoyama, T., Fukai, R., Tsujimoto, T.
- Organizer
  Lunar and Planetary Science Conference
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26220713
[Presentation] Petrogenesis of a unique shergottite Zagami: Implications from REE signature of pyroxene.2018
- Author(s)
  Tobita, M., Makino, Y., Okabayashi, S., Usui, T., Niihara, T., Misawa, K., Hirata, T., Yokoyama, T. Moriwaki, R.
- Organizer
  Goldschmidt Conference
- Int'l Joint Research
- Data Source
  KAKENHI-PLANNED-26106002
[Presentation] Formation of Metal Phases in CR Chondrites: Implications from Highly Siderophile Elements2018
- Author(s)
  Nakanishi, N., Yokoyama, T., Okabayashi, S., Iwamori, H.
- Organizer
  Lunar and Planetary Science Conference
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26220713
[Presentation] Meteoritical perspective on the origin of r-process nuclides in the Solar System2018
- Author(s)
  Yokoyama T.、 Fukai R.、 Tsujimoto T.
- Organizer
  3rd Korea-Japan Joint Workshop on Isotope-Ratio Mass Spectrometry
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-18H01258
[Presentation] Molybdenum isotopic evidence for late accretion of outer Solar System materials2018
- Author(s)
  Yokoyama, T., Nagai, Y., Hirata, T.
- Organizer
  日本地球化学会年会
- Data Source
  KAKENHI-PUBLICLY-18H04457
[Presentation] Nucleosynthetic Sr-;Nd correlation in bulk chondrites: Evidence for nebular thermal processing and transportation of refractory dusts in the early Solar System2018
- Author(s)
  Fukai R.、 Yokoyama T.
- Organizer
  Goldschmidt Conference
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-18H01258
[Presentation] Geochemistry, Petrology, and Sm-Nd Dating of a Stannern Group Eucrite, Northwest Africa 71882018
- Author(s)
  Kagami, S., Haba, M.K., Yokoyama, T., Usui, T., Greenwood, R.C.
- Organizer
  Lunar and Planetary Science Conference
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26220713
[Presentation] Isotopic dichotomy in the early Solar System inferred from nucleosynthetic Sr isotope anomalies in bulk chondrites2018
- Author(s)
  Fukai, R., Yokoyama, T., Sugimoto, K.
- Organizer
  The Seventh Symposium on Polar Science, National Institute of Polar Research
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26220713
[Presentation] Trace Element Analysis and Iron Isotopic Signature of Lunar Regolith2018
- Author(s)
  Okabayashi, S., Yokoyama, T., Terakado, K., Galimov, E.M.
- Organizer
  Lunar and Planetary Science Conference
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26220713
[Presentation] Molybdenum isotopic evidence for late accretion of outer Solar System materials.2018
- Author(s)
  Yokoyama, T., Nagai, Y., Hirata, T.
- Organizer
  日本地球化学会2018年年会
- Int'l Joint Research
- Data Source
  KAKENHI-PLANNED-26106002
[Presentation] Nucleosynthetic Sr-Nd correlation in bulk chondrites: Evidence for nebular thermal processing and transportation of refractory dusts in the early Solar System2018
- Author(s)
  Fukai, R., Yokoyama, T.
- Organizer
  Goldschmidt Conference 2018
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26220713
[Presentation] Trace Element Analysis and Iron Isotopic Signature of Lunar Regolith2018
- Author(s)
  Okabayashi, S., Yokoyama, T., Terakado, K., Galimov, E.M.
- Organizer
  Lunar and Planetary Science Conference
- Data Source
  KAKENHI-PROJECT-16H04081
[Presentation] Molybdenum isotopic evidence for late accretion of outer Solar System materials2018
- Author(s)
  Yokoyama, T., Nagai, Y., Hirata, T.
- Organizer
  2018年度日本地球化学会年会
- Data Source
  KAKENHI-PROJECT-26220713
[Presentation] Lead Isotopic Systematics of Martian Meteorite Zagami2017
- Author(s)
  Tobita, M., Usui, T., Niihara, T., Misawa, K., Yokoyama, T.
- Organizer
  The 27th V.M. Goldschmidt Conference
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26220713
[Presentation] In-Situ Analyses of Highly Siderophile Elements in Fe-Ni Metal of Ordinary Chondrites.2017
- Author(s)
  Okabayashi, S., Yokoyama, T., Nakanishi, N., Iwamori, H.
- Organizer
  Lunar and Planetary Science Conference
- Place of Presentation
  The Woodlands, USA.
- Year and Date
  2017-03-20
- Int'l Joint Research
- Data Source
  KAKENHI-PLANNED-26106002
[Presentation] The possible linkages between carbon perturbations during the Toarcian Oceanic Anoxic Event and the Karoo-Ferrar volcanism in the central Panthalassa2017
- Author(s)
  Fujisaki, W., Ueda, H., Suda, K., Sato, T., Matsui, Y., Sawaki, Y., Yokoyama, T.
- Organizer
  日本地質学会第124年学術大会
- Data Source
  KAKENHI-PLANNED-26106002
[Presentation] Lead Isotopic Systematics of Martian Meteorite Zagami2017
- Author(s)
  Tobita, M., Usui, T., Niihara, T., Misawa, K., Yokoyama, T.
- Organizer
  Goldschmidt Conference
- Data Source
  KAKENHI-PROJECT-16H04081
[Presentation] High Precision Sr Isotope Measurements for Bulk Chondrites with Complete Sample Digestion2017
- Author(s)
  Fukai, R., Yokoyama, T., Okui, W., Hasegawa, S.
- Organizer
  The 27th V.M. Goldschmidt Conference
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26220713
[Presentation] Origin of R-Process Nuclides in the Solar System: Astronomical and Meteoritical Perspectives2017
- Author(s)
  Yokoyama, T., Fukai, R., Tsujimoto, T.
- Organizer
  The 27th V.M. Goldschmidt Conference
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26220713
[Presentation] TIMSを用いた超高精度Sr同位体測定2017
- Author(s)
  深井稜汰・横山哲也・杉本圭
- Organizer
  質量分析学会同位体比部会
- Data Source
  KAKENHI-PROJECT-26220713
[Presentation] High Precision Sr Isotope Measurements for Bulk Chondrites with Complete Sample Digestion2017
- Author(s)
  Fukai, R., Yokoyama, T., Okui, W., Hasegawa, S.
- Organizer
  Goldschmidt Conference
- Data Source
  KAKENHI-PROJECT-16H04081
[Presentation] Isotopic dichotomy in the early Solar System inferred from nucleosynthetic Sr isotope anomalies in bulk chondrites2017
- Author(s)
  Fukai, R., Yokoyama, T., Sugimoto, K.
- Organizer
  The Seventh Symposium on Polar Science, National Institute of Polar Research
- Data Source
  KAKENHI-PROJECT-16H04081
[Presentation] Petrology and Sm-Nd Chronologies of a Basaltic Eucrite, NWA 7188.2017
- Author(s)
  Kagami, S., Yokoyama, T., Usui, T., Haba, M.
- Organizer
  Lunar and Planetary Science Conference
- Place of Presentation
  The Woodlands, USA.
- Year and Date
  2017-03-20
- Int'l Joint Research
- Data Source
  KAKENHI-PLANNED-26106002
[Presentation] Analysis of Highly Siderophile Elements and Osmium Isotope Compositions in Metal Phases from CR Chondrites.2017
- Author(s)
  Nakanishi, N., Yokoyama, T., Okabayashi, S., Shimazaki, K., Usui, T., Iwamori, H.
- Organizer
  Lunar and Planetary Science Conference
- Place of Presentation
  The Woodlands, USA.
- Year and Date
  2017-03-20
- Int'l Joint Research
- Data Source
  KAKENHI-PLANNED-26106002
[Presentation] Origin of R-Process Nuclides in the Solar System: Astronomical and Meteoritical Perspectives2017
- Author(s)
  Yokoyama, T., Fukai, R., Tsujimoto, T.
- Organizer
  Goldschmidt Conference
- Invited
- Data Source
  KAKENHI-PROJECT-16H04081
[Presentation] Development of precise isotope analysis for small amount of Pb using 204Pb-207Pb double spike TIMS2016
- Author(s)
  Tobita, M., Fukami, Y., Yokoyama, T., Usui, T., R., M. & Asanuma, H.
- Organizer
  The 26th V.M. Goldschmidt Conference
- Place of Presentation
  Pacifico Yokohama (Yokohama, Kanagawa Prefecture, JAPAN)
- Year and Date
  2016-06-26
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26220713
[Presentation] Nucleosynthetic Yb isotope anomalies in meteorites.2016
- Author(s)
  Yokoyama T, Nakahara M, Fukai R.
- Organizer
  Goldschmidt Conference
- Place of Presentation
  Yokohama, Kanagawa
- Year and Date
  2016-06-29
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16H04081
[Presentation] Nucleosynthetic neodymium isotope anomalies of bulk chondrites.2016
- Author(s)
  Fukai R, Yokoyama T, Okui W.
- Organizer
  The Seventh Symposium on Polar Science
- Place of Presentation
  Tachikawa, Tokyo
- Year and Date
  2016-12-01
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16H04081
[Presentation] Mo isotope evidence for distinct isotope reservoirs in the early Solar System.2016
- Author(s)
  Nagai Y, Yokoyama T.
- Organizer
  Goldschmidt Conference
- Place of Presentation
  Yokohama, Kanagawa
- Year and Date
  2016-06-28
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16H04081
[Presentation] In search of nucleosynthetic ytterbium isotope anomalies in chondrites2016
- Author(s)
  Yokoyama, T., Nakahara, M. & Fukai, R.
- Organizer
  47th Lunar and Planetary Science Conference
- Place of Presentation
  Woodlands waterway convention center (The Woodlands, Texas, USA)
- Year and Date
  2016-03-24
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26220713
[Presentation] Origin and evolution of r-process nuclides in Local Universe2016
- Author(s)
  Tsujimoto, T. & Yokoyama, T.
- Organizer
  The 26th V.M. Goldschmidt Conference
- Place of Presentation
  Pacifico Yokohama (Yokohama, Kanagawa Prefecture, JAPAN)
- Year and Date
  2016-06-26
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26220713
[Presentation] Lead isotopic systematics of Martian meteorite Zagami.2016
- Author(s)
  Tobita M, Usui T, Niihara T, Misawa K, Yokoyama T.
- Organizer
  The Seventh Symposium on Polar Science
- Place of Presentation
  Tachikawa, Tokyo
- Year and Date
  2016-12-02
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-15K13602
[Presentation] 147Sm-143Nd and 146Sm-142Nd systematics of basaltic eucrites2016
- Author(s)
  Kagami, S., Yokoyama, T. & Usui, T.
- Organizer
  47th Lunar and Planetary Science Conference
- Place of Presentation
  Woodlands waterway convention center (The Woodlands, Texas, USA)
- Year and Date
  2016-03-24
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26220713
[Presentation] 146Sm-142Nd whole-rock isochron age of basaltic eucrites2016
- Author(s)
  Kagami, S., Yokoyama, T. & Usui, T.
- Organizer
  The 26th V.M. Goldschmidt Conference
- Place of Presentation
  Pacifico Yokohama (Yokohama, Kanagawa Prefecture, JAPAN)
- Year and Date
  2016-06-26
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26220713
[Presentation] Nucleosynthetic neodymium isotope anomalies in bulk chondrites.2016
- Author(s)
  Fukai R, Yokoyama T.
- Organizer
  Goldschmidt Conference
- Place of Presentation
  Yokohama, Kanagawa
- Year and Date
  2016-06-28
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16H04081
[Presentation] Osmium isotope excursion in the central Panthalassa during the Toarcian Oceanic Anoxic Event: Relationships between Karoo-Ferrar volcanism and climatic-biologic changes2016
- Author(s)
  藤崎渉、澤木佑介、上田修裕、須田好、佐藤友彦、西澤学、横山哲也
- Organizer
  日本地球惑星科学連合2016年大会
- Place of Presentation
  幕張メッセ(千葉)
- Year and Date
  2016-05-22
- Data Source
  KAKENHI-PLANNED-26106002
[Presentation] Molybdenum isotope anomalies in non-carbonaceous meteorites2016
- Author(s)
  Nagai, Y., Yokoyama, T.
- Organizer
  Lunar and Planetary Science Conference
- Place of Presentation
  The Woodlands, USA
- Year and Date
  2016-03-21
- Data Source
  KAKENHI-PROJECT-23224012
[Presentation] In situ analysis of Os isotopes and highly siderophile element concentrations in metal grains from CB chondrites2016
- Author(s)
  Nakanishi, N., Yokoyama, T., Usui, T. & Iwamori, H.
- Organizer
  The 26th V.M. Goldschmidt Conference
- Place of Presentation
  Pacifico Yokohama (Yokohama, Kanagawa Prefecture, JAPAN)
- Year and Date
  2016-06-26
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26220713
[Presentation] Mo isotope evidence for distinct isotope reservoirs in the early Solar System2016
- Author(s)
  Nagai, Y. & Yokoyama, T.
- Organizer
  The 26th V.M. Goldschmidt Conference
- Place of Presentation
  Pacifico Yokohama (Yokohama, Kanagawa Prefecture, JAPAN)
- Year and Date
  2016-06-26
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26220713
[Presentation] Origin and evolution of r-process nuclides in Local Universe.2016
- Author(s)
  Tsujimoto T, Yokoyama T.
- Organizer
  Goldschmidt Conference
- Place of Presentation
  Yokohama, Kanagawa
- Year and Date
  2016-06-29
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16H04081
[Presentation] Molybdenum isotope anomalies in non-carbonaceous meteorites2016
- Author(s)
  Nagai, Y. & Yokoyama, T.
- Organizer
  47th Lunar and Planetary Science Conference
- Place of Presentation
  Woodlands waterway convention center (The Woodlands, Texas, USA)
- Year and Date
  2016-03-24
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26220713
[Presentation] Uranium-thorium-lead isotope systematics in depleted shergottites: Implications for the heterogeneous shergottite source mantle2016
- Author(s)
  Moriwaki, R., Usui, T. & Yokoyama, T.
- Organizer
  The 26th V.M. Goldschmidt Conference
- Place of Presentation
  Pacifico Yokohama (Yokohama, Kanagawa Prefecture, JAPAN)
- Year and Date
  2016-06-26
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26220713
[Presentation] Origin and evolution of r-nuclides in Local Universe2016
- Author(s)
  Tsujimoto, T., Yokoyama, T.
- Organizer
  Goldschmidt Conference
- Place of Presentation
  Yokohama, Kanagawa
- Year and Date
  2016-06-29
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-15K13602
[Presentation] Nucleosynthetic neodymium isotope anomalies in carbonaceous and ordinary chondrites2016
- Author(s)
  Fukai, R. & Yokoyama, T.
- Organizer
  47th Lunar and Planetary Science Conference
- Place of Presentation
  Woodlands waterway convention center (The Woodlands, Texas, USA)
- Year and Date
  2016-03-23
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26220713
[Presentation] Reconstruction of paleoceanographic environments in the Anisian (Middle Triassic)2016
- Author(s)
  藤崎渉、浅沼尚、須田好、鈴木和恵、吉屋一美、佐藤友彦、澤木佑介、松井洋平、横山哲也
- Organizer
  日本地質学会第123年学術大会
- Place of Presentation
  日本大学(東京)
- Year and Date
  2016-09-01
- Data Source
  KAKENHI-PLANNED-26106002
[Presentation] Nucleosynthetic Yb isotope anomalies in meteorites2016
- Author(s)
  Yokoyama, T., Nakahara, M. & Fukai, R.
- Organizer
  The 26th V.M. Goldschmidt Conference
- Place of Presentation
  Pacifico Yokohama (Yokohama, Kanagawa Prefecture, JAPAN)
- Year and Date
  2016-06-26
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26220713
[Presentation] In search of nucleosynthetic ytterbium isotope anomalies in chondrites2016
- Author(s)
  Yokoyama, T., Nakahara, M., Fukai, R.
- Organizer
  Lunar and Planetary Science Conference
- Place of Presentation
  Woodlands, USA
- Year and Date
  2016-03-21
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-25287144
[Presentation] Nucleosynthetic neodymium isotope anomalies in bulk chondrites2016
- Author(s)
  Fukai, R. & Yokoyama, T.
- Organizer
  The 26th V.M. Goldschmidt Conference
- Place of Presentation
  Pacifico Yokohama (Yokohama, Kanagawa Prefecture, JAPAN)
- Year and Date
  2016-06-26
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26220713
[Presentation] Analysis of highly siderophile elements in metal phases from CR chondrite, NWA 801.2016
- Author(s)
  Nakanishi N, Yokoyama T, Okabayashi S, Shimazaki K, Usui T, Iwamori H.
- Organizer
  The Seventh Symposium on Polar Science
- Place of Presentation
  Tachikawa, Tokyo
- Year and Date
  2016-12-01
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-15K13602
[Presentation] Intensive hydration of the wedge mantle at the Kuril arc-NE Japan arc junction: implications from mafic lavas from Usu Volcano, northern Japan2015
- Author(s)
  Takeshi Kuritani, Mayumi Tanaka, Tetsuya Yokoyama, Mitsuhiro Nakagawa, Akiko Matsumoto
- Organizer
  American Geophysical Union 2015 Fall meeting
- Place of Presentation
  Moscone Center (San Francisco, USA)
- Year and Date
  2015-12-14
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-25287144
[Presentation] Nucleosynthetic isotope variation of siderophile and chalcophile elements in the Solar System2015
- Author(s)
  Yokoyama, T, Walker, R.J.
- Organizer
  Mineralogical Society of America & Geochemistry Short Course
- Place of Presentation
  La Jolla, USA
- Year and Date
  2015-12-11
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-15K13602
[Presentation] High precision Nd isotope analysis using TIMS with improved dynamic-multicollection method2015
- Author(s)
  Fukai, R., Yokoyama, T. & Kagami, S.
- Organizer
  The 25th V.M. Goldschmidt Conference
- Place of Presentation
  Prague Congress Centre (Prague, Czech Republic)
- Year and Date
  2015-08-20
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26220713
[Presentation] New Chemical Separation Technique of Nd for 146Sm-142Nd Chronology2015
- Author(s)
  Kagami, S. & Yokoyama, T.
- Organizer
  The 25th V.M. Goldschmidt Conference
- Place of Presentation
  Prague Congress Centre (Prague, Czech Republic)
- Year and Date
  2015-08-18
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26220713
[Presentation] 有珠山・外輪山溶岩のマグマプロセス2015
- Author(s)
  栗谷豪、田中真弓、横山哲也、中川光弘、松本亜希子
- Organizer
  日本地球惑星科学連合2015年大会
- Place of Presentation
  幕張メッセ（千葉県千葉市）
- Year and Date
  2015-05-22
- Data Source
  KAKENHI-PROJECT-25287144
[Presentation] Compositional Diversity of Asteroid Belt and Isotope Anomalies in Meteorites2015
- Author(s)
  横山哲也
- Organizer
  同位体宇宙地球化学研究会
- Place of Presentation
  すわ湖苑（長野県諏訪市）
- Year and Date
  2015-09-25
- Data Source
  KAKENHI-PLANNED-26106002
[Presentation] Highly Precise Mo Isotope Analysis by N-TIMS with In-Run Oxygen Isotopic Correction2015
- Author(s)
  Nagai, Y., Yokoyama, T., Fukami, Y.
- Organizer
  Goldschmidt Conference
- Place of Presentation
  Prague, Czech Republic
- Year and Date
  2015-08-16
- Data Source
  KAKENHI-PROJECT-23224012
[Presentation] 47Sm-143Nd and 146Sm-142Nd chronology of a basaltic eucrite, NWA71882015
- Author(s)
  Kagami, S., Yokoyama, T., Usui, T. & Fukai, R.
- Organizer
  46th Lunar and Planetary Science Conference
- Place of Presentation
  Woodlands waterway convention center (The Woodlands, Texas, USA)
- Year and Date
  2015-03-17
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26220713
[Presentation] Compositional diversity of Archaean mantle estimated from Sr and Nd isotopic systematics of basaltic rocks in North Pole2015
- Author(s)
  Sano, A., Nakamura, H., Komiya, T., Yokoyama, T., Uno, M., Kimura, J., Chang, Q. & Iwamori, H.
- Organizer
  Japan Geoscience Union Meeting 2015
- Place of Presentation
  Makuhari Messe (Makuhari, Chiba, Japan)
- Year and Date
  2015-05-25
- Data Source
  KAKENHI-PROJECT-26220713
[Presentation] Origin of isotope heterogeneity in the Solar System: Supernova input or thermal processing?2015
- Author(s)
  Yokoyama, T., Nakamoto, T. & Tsujimoto, T.
- Organizer
  The 25th V.M. Goldschmidt Conference
- Place of Presentation
  Prague Congress Centre (Prague, Czech Republic)
- Year and Date
  2015-08-20
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26220713
[Presentation] Origin of Isotope Heterogeneity in the Solar System: Supernova Input or Thermal Processing?2015
- Author(s)
  Yokoyama, T., Nakamoto, T., Tsujimoto, T.
- Organizer
  Goldschmidt Conference
- Place of Presentation
  Prague, Czech Republic
- Year and Date
  2015-08-06
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-25287144
[Presentation] 有珠山・玄武岩質マグマの生成条件2015
- Author(s)
  栗谷豪、田中真弓、横山哲也、中川光弘、松本亜希子
- Organizer
  日本火山学会
- Place of Presentation
  富山大学五福キャンパス（富山県富山市）
- Year and Date
  2015-09-25
- Data Source
  KAKENHI-PROJECT-25287144
[Presentation] Nucleosynthetic Strontium Isotope Variability in Allende CAIs2015
- Author(s)
  Myojo, K., Yokoyama, T., Sugiura, N., Wakaki, S.
- Organizer
  Goldschmidt Conference
- Place of Presentation
  Prague, Czech Republic
- Year and Date
  2015-08-16
- Data Source
  KAKENHI-PROJECT-23224012
[Presentation] Highly precise Mo isotope analysis by N-TIMS with in-run oxygen isotopic correction2015
- Author(s)
  Nagai, Y., Yokoyama, T. & Fukami, Y.
- Organizer
  The 25th V.M. Goldschmidt Conference
- Place of Presentation
  Prague Congress Centre (Prague, Czech Republic)
- Year and Date
  2015-08-20
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26220713
[Presentation] 113In-203Tlダブルスパイクを用いた同位体希釈内標準ICP-MS法による岩石の微量元素濃度測定2015
- Author(s)
  横山哲也、日野原侑、永井友一朗、森智比古
- Organizer
  2015年日本地球化学会年会
- Place of Presentation
  横浜国立大（神奈川県横浜市）
- Year and Date
  2015-09-16
- Data Source
  KAKENHI-PROJECT-25287144
[Presentation] Nucleosynthetic strontium isotope anomalies in carbonaceous chondrites2015
- Author(s)
  Yokoyama, T., Yamazaki, H. & Hasegawa, S.
- Organizer
  46th Lunar and Planetary Science Conference
- Place of Presentation
  Woodlands waterway convention center (The Woodlands, Texas, USA)
- Year and Date
  2015-03-17
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26220713
[Presentation] High precision neodymium isotopic analysis of chondrites with complete sample digestion2015
- Author(s)
  Fukai, R., Yokoyama, T., Kagami, S. & Takahashi, H.
- Organizer
  46th Lunar and Planetary Science Conference
- Place of Presentation
  Woodlands waterway convention center (The Woodlands, Texas, USA)
- Year and Date
  2015-03-17
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26220713
[Presentation] Nucleosynthetic Strontium Isotope Variability in Allende CAIs2015
- Author(s)
  Myojo, K., Yokoyama, T., Sugiura, N. & Wakaki, S.
- Organizer
  The 25th V.M. Goldschmidt Conference
- Place of Presentation
  Prague Congress Centre (Prague, Czech Republic)
- Year and Date
  2015-08-20
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26220713
[Presentation] Sr isotope evidence for the origin of chondrules.2015
- Author(s)
  Okui, W., Yokoyama, T. & Usui, T.
- Organizer
  The 25th V.M. Goldschmidt Conference
- Place of Presentation
  Prague Congress Centre (Prague, Czech Republic)
- Year and Date
  2015-08-20
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26220713
[Presentation] Tellurium isotope anomaly in acid resistant fraction of Allende meteorite2014
- Author(s)
  Fukami, Y., Yokoyama, T., Okui, W. okoyama, T., Usui, T., Iwamori, H., Uno, M
- Organizer
  Lunar and Planetary Science Conference
- Place of Presentation
  The Woodlands, TX, USA
- Data Source
  KAKENHI-PROJECT-23340171
[Presentation] Chemical Separation of Mo and W from Extraterrestrial Samples by Anion Exchange Chromatography2014
- Author(s)
  Nagai, Y., Yokoyama, T.
- Organizer
  Geofluid 3
- Place of Presentation
  Tokyo
- Data Source
  KAKENHI-PROJECT-23340171
[Presentation] Origin of U-Th Disequilibrium in Subduction Zone Volcanic Rocks2014
- Author(s)
  Yokoyama, T., Ikemoto, A., Iwamori, H. and Ueki, K.
- Organizer
  Geofluid 3
- Place of Presentation
  東京工業大学デジタル多目的ホール, 東京
- Data Source
  KAKENHI-PROJECT-23224012
[Presentation] Tellurium isotope anomaly in acid residue of Allende meteorite2014
- Author(s)
  Fukami, Y., Yokoyama, T., Okui, W.
- Organizer
  Geofluid 3
- Place of Presentation
  Tokyo
- Data Source
  KAKENHI-PROJECT-23340171
[Presentation] 玄武岩質ユークライトJuvinasにおける147Sm-143Nd年代と146Sm-142Nd年代2014
- Author(s)
  鏡味沙耶, 横山哲也
- Organizer
  日本地球科学連合大会
- Place of Presentation
  日本神奈川県横浜市パシフィコヨコハマ
- Year and Date
  2014-05-02
- Data Source
  KAKENHI-PROJECT-26247083
[Presentation] Strontium isotope heterogeneity within single CAI from Allende2014
- Author(s)
  Myojo, K., Yokoyama, T., Sano, Y., Takahata, N., Sugiura, N., Wakaki, S
- Organizer
  Lunar and Planetary Science Conference
- Place of Presentation
  The Woodlands, TX, USA
- Data Source
  KAKENHI-PROJECT-23340171
[Presentation] Os isotope anomalies in early acid leachates from chondrites2014
- Author(s)
  Fukai, R., Yokoyama, T.
- Organizer
  Geofluid 3
- Place of Presentation
  Tokyo
- Data Source
  KAKENHI-PROJECT-23340171
[Presentation] 147Sm-143Nd and 146Sm-142Nd chronology of a basaltic Eucrite, Juvinas2014
- Author(s)
  Kagami, S., Yokoyama, T.
- Organizer
  Geofluid 3
- Place of Presentation
  Tokyo
- Data Source
  KAKENHI-PROJECT-23340171
[Presentation] Volatility control of isotope heterogeneity in the early solar system2014
- Author(s)
  Yokoyama, T., Fukami., Y., Nagai, Y., Nakamoto, T
- Organizer
  Lunar and Planetary Science Conference
- Place of Presentation
  The Woodlands, TX, USA
- Data Source
  KAKENHI-PROJECT-23340171
[Presentation] Volatility control of isotope heterogeneity in the early solar system2014
- Author(s)
  Yokoyama, T., Fukami, Y., Nagai, Y., Nakamoto, T.
- Organizer
  Lunar and Planetary Science Conference
- Place of Presentation
  The Woodlands, Texus, USA
- Data Source
  KAKENHI-PROJECT-23224012
[Presentation] Strontium stable isotope anomalies in Allende chondrules2014
- Author(s)
  Okui, W., Yokoyama, T., Usui, T., Iwamori, H., Uno, M
- Organizer
  Lunar and Planetary Science Conference
- Place of Presentation
  The Woodlands, TX, USA
- Data Source
  KAKENHI-PROJECT-23340171
[Presentation] Strontium Isotope Anomalies and 26Al-26Mg Chronology in CAIs from CV Chondrites2014
- Author(s)
  Myojo, K., Yokoyama, T., Sano, Y., Takahata, N., Sugiura, N., Iwamori, H., Uno, M.
- Organizer
  Geofluid 3
- Place of Presentation
  Tokyo
- Data Source
  KAKENHI-PROJECT-23340171
[Presentation] Preliminary report on U-Th-Pb isotope systematics of the olivine-phyric Shergottite Tissint2014
- Author(s)
  Moriwaki, R., Usui, T., Yokoyama, T.
- Organizer
  Geofluid 3
- Place of Presentation
  Tokyo
- Data Source
  KAKENHI-PROJECT-23340171
[Presentation] Strontium isotope anomalies in chondrules from carbonaceous chondrite2014
- Author(s)
  Okui, W., Yokoyama, T., Usui, T., Iwamori, H., Uno, M.
- Organizer
  Geofluid 3
- Place of Presentation
  Tokyo
- Data Source
  KAKENHI-PROJECT-23340171
[Presentation] Origin of U-Th Disequilibrium in Subduction Zone Volcanic Rocks2014
- Author(s)
  Yokoyama, T., Ikemoto, A., Iwamori, H. and Ueki, K.
- Organizer
  Geofluid 3
- Place of Presentation
  Tokyo
- Invited
- Data Source
  KAKENHI-PROJECT-23340171
[Presentation] 142Nd isotope anomaly in chondrite revisited2014
- Author(s)
  Yokoyama, T., Takahashi, H., Yamazaki, H.
- Organizer
  Goldschmidt Conference
- Place of Presentation
  Florence, Italy
- Data Source
  KAKENHI-PROJECT-23340171
[Presentation] Preliminary report on U-Th-Pb isotope systematics of olivine-phyric Shergottite Tissint2014
- Author(s)
  Moriwaki, R., Usui, T., Yokoyama, T., Simon, J.I., Jones, J.H.
- Organizer
  Lunar and Planetary Science Conference
- Place of Presentation
  The Woodlands, TX, USA
- Data Source
  KAKENHI-PROJECT-23340171
[Presentation] 142Nd isotope anomalies in chondrites revisited2013
- Author(s)
  Yokoyama, T., Takahashi, H., Yamazaki, H.
- Organizer
  日本地球惑星科学連合大会
- Place of Presentation
  幕張メッセ
- Data Source
  KAKENHI-PROJECT-23340171
[Presentation] 表面電離型質量分析計（TIMS）を用いた微小地球外試料の重元素精密同位体分析2013
- Author(s)
  横山哲也
- Organizer
  第61回質量分析学会討論会
- Place of Presentation
  つくば
- Invited
- Data Source
  KAKENHI-PROJECT-23340171
[Presentation] Determination of extremely small amount of U and Th by ID-TIMS for the study of U-Th cosmochronology2013
- Author(s)
  Watanabe, T., Yokoyama, T.
- Organizer
  日本地球惑星科学連合大会
- Place of Presentation
  幕張メッセ
- Data Source
  KAKENHI-PROJECT-23340171
[Presentation] コンドライト隕石の超高精度Sr同位体測定に向けた新しい試料分解法の開発2013
- Author(s)
  横山哲也、山崎洋
- Organizer
  地球化学会
- Place of Presentation
  つくば
- Data Source
  KAKENHI-PROJECT-23340171
[Presentation] Determination of in-situ Os isotope compositions in metal phases from CB chondrites using a micro sampling technique2013
- Author(s)
  Nakanishi, N., Yokoyama, T., Usui, T., Uno, M., Iwamori, H.
- Organizer
  日本地球惑星科学連合大会
- Place of Presentation
  幕張メッセ
- Data Source
  KAKENHI-PROJECT-23340171
[Presentation] アエンデ隕石中のコンドリュールの3次元形状と内部組織の関係2013
- Author(s)
  津田彩花，西田圭佑，高橋栄一，中本泰史，横山哲也，佐々木理，鹿納晴尚，柳田泰宏，奥村聡，中村美千彦
- Organizer
  日本地球惑星科学連合大会
- Place of Presentation
  千葉・幕張メッセ
- Data Source
  KAKENHI-PROJECT-24340102
[Presentation] Strontium Isotope Anomalies and 26Al-26Mg Chronology in CAIs from CV Chondrites2013
- Author(s)
  Myojo, K., Yokoyama, T., Sano, Y., Takahata, N., Sugiura, N., Iwamori, H., Uno, M.
- Organizer
  Goldschmidt Conference
- Place of Presentation
  Florence, Italy
- Data Source
  KAKENHI-PROJECT-23340171
[Presentation] U-series isotope disequilibrium in subduction zone volcanic rocks2013
- Author(s)
  Yokoyama, T.
- Organizer
  MNR 2013
- Place of Presentation
  Hotel Niwa Tokyo, 東京
- Data Source
  KAKENHI-PROJECT-23224012
[Presentation] U-series isotope disequilibrium in subduction zone volcanic rocks.2013
- Author(s)
  Yokoyama, T.
- Organizer
  MNR 2013
- Place of Presentation
  Tokyo
- Invited
- Data Source
  KAKENHI-PROJECT-23340171
[Presentation] Geochemical characterization of lavas from the Oku Volcanic Group, Cameroon Volcanic line, West Africa2013
- Author(s)
  Asaah, A.N.E, Yokoyama, T., Aka, F.T., Usui, T., Wirmvem, M.J., Tchambe, C.B., Ohba, T., Tanyileke, G., Hell, J.V.
- Organizer
  日本地球惑星科学連合大会
- Place of Presentation
  幕張メッセ
- Data Source
  KAKENHI-PROJECT-23340171
[Presentation] 表面電離型質量分析計（TIMS）を用いた微小地球外試料の重元素精密同位体分析2013
- Author(s)
  横山哲也
- Organizer
  第61回質量分析学会討論会
- Place of Presentation
  つくば国際会議場, つくば
- Data Source
  KAKENHI-PROJECT-23224012
[Presentation] 始原的隕石と斑状コンドリュールのストロンチウム安定同位体異常に関する研究2013
- Author(s)
  奥井航，横山哲也，中本泰史，高橋栄一，佐々木理，中村美千彦，奥村聡
- Organizer
  日本惑星科学会秋季講演会
- Place of Presentation
  沖縄県・石垣市
- Data Source
  KAKENHI-PROJECT-24340102
[Presentation] Molybdenum Isotopic Compositions in Allende Chondrules2013
- Author(s)
  Nagai, Y., Yokoyama, T., Okui, W.
- Organizer
  Goldschmidt Conference
- Place of Presentation
  Florence, Italy
- Data Source
  KAKENHI-PROJECT-23340171
[Presentation] Sr stable isotopic anomalies in primitive meteorites and chondrules2013
- Author(s)
  Okui, W., Yokoyama, T., Uno, M., Iwamori, H., Takahashi, E., Sasaki, O., Nakamura, M., Okumura, S.
- Organizer
  Goldschmidt Conference
- Place of Presentation
  Florence, Italy
- Data Source
  KAKENHI-PROJECT-23340171
[Presentation] Development of highly precise and accurate molybdenum isotope analysis using N-TIMS for the study of nucleosynthetic isotope anomalies in meteorites2013
- Author(s)
  Nagai, Y., Yokoyama, T.
- Organizer
  日本地球惑星科学連合大会
- Place of Presentation
  幕張メッセ
- Data Source
  KAKENHI-PROJECT-23340171
[Presentation] Tellurium Isotope Anomalies in Carbonaceous Chondrites : Results for Sequential Acid Leaching Experiments2012
- Author(s)
  Fukami, Y., Yokoyama, T.
- Organizer
  43rd Lunar and Planetary Science Conference
- Place of Presentation
  The Woodlands, Texas, USA
- Year and Date
  2012-03-20
- Data Source
  KAKENHI-PROJECT-23340171
[Presentation] Stellar Nucleosynthesis and Isotope Anomalies in Geologic Samples2012
- Author(s)
  Yokoyama, T.
- Organizer
  日本地球惑星科学連合大会
- Place of Presentation
  幕張メッセ（千葉県）
- Data Source
  KAKENHI-PROJECT-23224012
[Presentation] Uranium-series Disequilibrium in Volcanic Rocks from the Northeast Japan Arc2012
- Author(s)
  Yokoyama, T., Iwamori, H., Ueki, K.
- Organizer
  Misasa-2012 and Geofluid 2
- Place of Presentation
  鳥取県東伯郡三朝町(招待講演)
- Year and Date
  2012-03-19
- Data Source
  KAKENHI-PROJECT-23340171
[Presentation] Strontium Isotope Anomalies in Allende and Tagish Lake Meteorites : Results for Sequential Acid Leaching Experiments2012
- Author(s)
  Yokoyama, T., Ito, N., Okui, W., Fukami, Y.
- Organizer
  43rd Lunar and Planetary Science Conference
- Place of Presentation
  The Woodlands, Texas, USA
- Year and Date
  2012-03-21
- Data Source
  KAKENHI-PROJECT-23340171
[Presentation] 東北日本火山岩の238U-230Th放射非平衡2012
- Author(s)
  横山哲也
- Organizer
  日本地球化学会
- Place of Presentation
  九州大学（福岡県）
- Data Source
  KAKENHI-PROJECT-23224012
[Presentation] 始原的隕石における高精度Mo同位体比分析のための化学分離法の開発2011
- Author(s)
  永井友一朗、横山哲也
- Organizer
  日本地球化学会
- Place of Presentation
  北海道大学
- Year and Date
  2011-09-16
- Data Source
  KAKENHI-PROJECT-23340171
[Presentation] Stable Os isotopes : search for exosolar input from Precambrian sediments2011
- Author(s)
  Yokoyama, T., Nakane, F., Maruyama, S.
- Organizer
  Chimondai Symposium
- Place of Presentation
  東京工業大学
- Year and Date
  2011-10-31
- Data Source
  KAKENHI-PROJECT-23340171
[Presentation] Uranium-series disequilibrium in volcanic rocks from the Northeast Japan Arc2011
- Author(s)
  Yokoyama, T., Iwamori, H., Ueki, K.
- Organizer
  AGU fall Meeting
- Place of Presentation
  San Francisco, CA, USA
- Year and Date
  2011-12-08
- Data Source
  KAKENHI-PROJECT-23340171
[Presentation] Melt generation and timescales of fluid/melt migration in subduction zones : constraints from U-series disequilibria in volcanic rocks.2011
- Author(s)
  Yokoyama, T.
- Organizer
  First International Symposium on Geofluids
- Place of Presentation
  Tokyo Institute of Technology, Tokyo(Invited)
- Year and Date
  2011-03-19
- Data Source
  KAKENHI-PROJECT-21740388
[Presentation] Evaluation of parent body processes on presolar components in chondrites2011
- Author(s)
  Yokoyama, T., Alexander, C.M.O'D., Walker, R.J.
- Organizer
  日本地球惑星連合2010年大会
- Place of Presentation
  幕張メッセ
- Year and Date
  2011-05-26
- Data Source
  KAKENHI-PROJECT-23340171
[Presentation] Search for Nucleosynthetic Tellurium Isotopic Anomalies in Meteorites by N-TIMS2011
- Author(s)
  Fukami, Y., Yokoyama, T.
- Organizer
  Goldschmidt Conference
- Place of Presentation
  Prague, Czech Eepublic
- Year and Date
  2011-08-15
- Data Source
  KAKENHI-PROJECT-23340171
[Presentation] Development of tungsten stable isotope analysis using external correction technique by MC-ICP-MS2011
- Author(s)
  Fukami, Y, Kimura, J.-I., Yokoyama, T., Hirata, T.
- Organizer
  First International Symposium on Geofluids
- Place of Presentation
  Tokyo Institute of Technology, Tokyo
- Year and Date
  2011-03-17
- Data Source
  KAKENHI-PROJECT-21740388
[Presentation] TIMSを用いた超高精度Nd同位体比測定法の開発2011
- Author(s)
  高橋宏和、横山哲也
- Organizer
  日本地球化学会2011年年会
- Place of Presentation
  北海道大学
- Year and Date
  2011-09-15
- Data Source
  KAKENHI-PROJECT-23340171
[Presentation] Sr isotope anomalies in Allende and Tagish Lake meteorites : Results for a leaching experiment2011
- Author(s)
  Yokoyama, T., Ito, N., Okui, W.
- Organizer
  Chemical Evolution of the Universe
- Place of Presentation
  首都大学東京
- Year and Date
  2011-11-01
- Data Source
  KAKENHI-PROJECT-23340171
[Presentation] Evaluation of parent body processes on presolar components in chondrites : Osmium isotopes in acid residues from CM and CR chondrites.2011
- Author(s)
  Yokoyama, T., Alexander, C.M.O'D., Walker, R.J.
- Organizer
  42nd Lunar Planet. Sci. Conf.
- Place of Presentation
  The Woodlands, USA
- Year and Date
  2011-03-12
- Data Source
  KAKENHI-PROJECT-21740388
[Presentation] Evaluation of parent body processes on presolar components in chondrites : Osmium isotopes in acid residues from CM and CR chondrites.2011
- Author(s)
  Yokoyama, T., Alexander, C.M.O'D., Walker, R.J.
- Organizer
  42nd Lunar and Planetary Science Conference
- Place of Presentation
  The Woodlands, USA
- Year and Date
  2011-03-12
- Data Source
  KAKENHI-PROJECT-21740388
[Presentation] COコンドライト隕石中のCAIの年代学2011
- Author(s)
  明星邦弘、横山哲也、佐野有司、高畑直人、杉浦直治
- Organizer
  日本地球化学会2011年年会
- Place of Presentation
  北海道大学
- Year and Date
  2011-09-15
- Data Source
  KAKENHI-PROJECT-23340171
[Presentation] 岩石標準試料及び隕石の^<238>U/^<235>U同位体比測定2011
- Author(s)
  渡辺龍哉、横山哲也
- Organizer
  日本地球化学会2011年年会
- Place of Presentation
  北海道大学
- Year and Date
  2011-09-15
- Data Source
  KAKENHI-PROJECT-23340171
[Presentation] TIMS中で起きるPbの異常な質量分別2011
- Author(s)
  森智比古、横山哲也
- Organizer
  日本地球化学会2011年年会
- Place of Presentation
  北海道大学
- Year and Date
  2011-09-15
- Data Source
  KAKENHI-PROJECT-23340171
[Presentation] Iron Isotopic Signature for Weathered Ordinary Chondrites : Application of the LAL sampling-ICP-MS Technique for Cosmochemical Sample2011
- Author(s)
  Okabayashi S, Yokoyama T, Yokoyama T, Hirata T
- Organizer
  Goldschmidt Conference
- Place of Presentation
  Prague, Czech Republic
- Year and Date
  2011-08-15
- Data Source
  KAKENHI-PROJECT-23340171
[Presentation] ステップワイズ法による始原的隕石の多元素同位体異常検出の試み2011
- Author(s)
  横山哲也、伊藤伸朗、永井友一朗
- Organizer
  日本地球化学会2011年年会
- Place of Presentation
  北海道大学
- Year and Date
  2011-09-15
- Data Source
  KAKENHI-PROJECT-23340171
[Presentation] Development of chemical separations of Mo for the study of precise Moisotope analysis in chondrites2011
- Author(s)
  Nagai Y., Yokoyama T.
- Organizer
  Japan-Korea Joint Meeting of Isotope-Ratio Mass Spectrometry(同位体比部会)
- Place of Presentation
  Haeundae Grand Hotel, Busan, Korea
- Year and Date
  2011-11-23
- Data Source
  KAKENHI-PROJECT-23340171
[Presentation] Breakthrough in Thermal Ionization of Mass Spectrometry (TIMS)2011
- Author(s)
  Yokoyama T.
- Organizer
  Japan-Korea Joint Meeting of Isotope-Ratio Mass Spectrometry(同位体比部会)
- Place of Presentation
  Haeundae Grand Hotel, Busan, Korea
- Year and Date
  2011-11-23
- Data Source
  KAKENHI-PROJECT-23340171
[Presentation] Evaluation of In-House Metallic Standard for Siderophile Elements Using fs-La-ICPMS2011
- Author(s)
  Yokoyama TD, Imai T, Uchiyama Y, Suzuki T, Yokoyama T, Takeyama M, Takahashi E, Hirata T
- Organizer
  Goldschmidt Conference
- Place of Presentation
  Prague, Czech Republic
- Year and Date
  2011-08-15
- Data Source
  KAKENHI-PROJECT-23340171
[Presentation] 始原的隕石のストロンチウム安定同位体比分析2011
- Author(s)
  奥井航、横山哲也
- Organizer
  日本地球化学会2011年年会
- Place of Presentation
  北海道大学
- Year and Date
  2011-09-15
- Data Source
  KAKENHI-PROJECT-23340171
[Presentation] N-TIMSによる始原的隕石中テルルの同位体異常の探索2011
- Author(s)
  深海雄介、横山哲也
- Organizer
  日本地球化学会第58回大会
- Place of Presentation
  北海道大学
- Year and Date
  2011-09-15
- Data Source
  KAKENHI-PROJECT-23340171
[Presentation] タングステン安定同位体組成からみたIIIAB鉄隕石とパラサイトメイングループ関連性2010
- Author(s)
  深海雄介, 木村純一, 入澤啓太, 横山哲也, 平田岳史
- Organizer
  2010年度日本地球化学会年会
- Place of Presentation
  立正大学
- Year and Date
  2010-09-09
- Data Source
  KAKENHI-PROJECT-22244069
[Presentation] 元素・同位体分析を目的とした液中レーザーアブレーション法(LAL)の開発2010
- Author(s)
  岡林識起, 横山隆臣, 横山哲也, 平田岳史
- Organizer
  2010年度日本地球化学会年会
- Place of Presentation
  立正大学
- Year and Date
  2010-09-08
- Data Source
  KAKENHI-PROJECT-21740388
[Presentation] コンドライトの耐酸性残渣のOs同位体異常と母天体プロセス2010
- Author(s)
  横山哲也, Alexander, C.M.O'D., Walker, R.J.
- Organizer
  2010年度質量分析学会同位体比部会
- Place of Presentation
  別府
- Year and Date
  2010-11-19
- Data Source
  KAKENHI-PROJECT-21740388
[Presentation] isotope anomalies in acid residues from enstatite chondrites.2010
- Author(s)
  Yokoyama, T., Alexander, C.M.O'D., Walker, R.J.
- Organizer
  41st Lunar Planet. Sci. Conf.
- Place of Presentation
  The Woodlands, USA
- Year and Date
  2010-03-01
- Data Source
  KAKENHI-PROJECT-21740388
[Presentation] Osmium isotope anomalies in acid residues from enstatite chondrites2010
- Author(s)
  横山哲也, Alexander, C.M.O'D., Walker, R.J.
- Organizer
  41st Lunar and Planetary Science Conference
- Place of Presentation
  The Woodlands, USA
- Year and Date
  2010-03-01
- Data Source
  KAKENHI-PROJECT-21740388
[Presentation] 親鉄性元素分析のための金属質標準物質の合成2010
- Author(s)
  横山隆臣, 今井崇暢, 横山哲也, 高橋栄一, 鈴木敏弘, 竹山雅夫, 平田岳史
- Organizer
  2010年度日本地球化学会年会
- Place of Presentation
  立正大学
- Year and Date
  2010-09-08
- Data Source
  KAKENHI-PROJECT-21740388
[Presentation] Evaluation of laser ablation in liquids as new sampling method for ICP-MS2010
- Author(s)
  Okabayashi, S., Yokoyama, T.D., Yamamoto, S., Yokoyama, T., Hirata, T.
- Organizer
  10th European Workshop on Laser Ablation
- Place of Presentation
  Kiel, Germany
- Year and Date
  2010-06-30
- Data Source
  KAKENHI-PROJECT-21740388
[Presentation] タングステン安定同位体組成からみたIIIAB鉄限石とパラサイトメイングループの関連性2010
- Author(s)
  深海雄介, 木村純一, 入澤啓太, 横山哲也, 平田岳史
- Organizer
  2010年度日本地球化学会年会
- Place of Presentation
  立正大学
- Year and Date
  2010-09-09
- Data Source
  KAKENHI-PROJECT-21740388
[Presentation] Osmium isotope heterogeneities in iron meteorites and pallasites2010
- Author(s)
  Walker, R.J., Yokoyama, T., Herzog, G., Cook, D.L.
- Organizer
  41st Lunar and Planetary Science Conference
- Place of Presentation
  The Woodlands, USA
- Year and Date
  2010-03-02
- Data Source
  KAKENHI-PROJECT-21740388
[Presentation] エンスタタイトコンドライトの耐酸性残渣におけるOs同位体異常2010
- Author(s)
  横山哲也, Alexander, C.M.O'D., Walker, R.J.
- Organizer
  日本地球惑星連合2010年大会
- Place of Presentation
  幕張メッセ
- Year and Date
  2010-05-27
- Data Source
  KAKENHI-PROJECT-21740388
[Presentation] Evaluation of laser ablation in liquids as new sampling method for ICP-MS2010
- Author(s)
  Okabayashi, S., Yokoyama, T.D., Yamamoto, S., Yokoyama, T., Hirata, T.
- Organizer
  10th European Workshop on Laser Ablation
- Place of Presentation
  Kiel, Germany
- Year and Date
  2010-06-30
- Data Source
  KAKENHI-PROJECT-22244069
[Presentation] 元素・同位体分析を目的とした液中レーザーアブレーション法(LAL)の開発2010
- Author(s)
  岡林識起, 横山隆臣, 横山哲也, 平田岳史
- Organizer
  2010年度日本地球化学会年会
- Place of Presentation
  立正大学
- Year and Date
  2010-09-08
- Data Source
  KAKENHI-PROJECT-22244069
[Presentation] 重元素の高精度同位体分析で探る超新星爆発物質2010
- Author(s)
  横山哲也
- Organizer
  第5回「地文台によるサイエンス」シンポジウム
- Place of Presentation
  JAXA筑波宇宙センター
- Year and Date
  2010-11-02
- Data Source
  KAKENHI-PROJECT-21740388
[Presentation] Mass-dependent fractionation of tungsten isotopes in IIIAB iron meteorites and main-group pallasites2010
- Author(s)
  深海雄介, 木村純一, 入澤啓太, 横山哲也, 平田岳史
- Organizer
  41st Lunar and Planetary Science Conference
- Place of Presentation
  The Woodlands, USA
- Year and Date
  2010-03-02
- Data Source
  KAKENHI-PROJECT-21740388
[Presentation] MC-ICP-MSによるタングステン安定同位体分析における質量差別効果の補正について2010
- Author(s)
  深海雄介, 横山哲也, 木村純一, 平田岳史
- Organizer
  2010年度質量分析学会同位体比部会
- Place of Presentation
  別府
- Year and Date
  2010-11-18
- Data Source
  KAKENHI-PROJECT-21740388
[Presentation] IIIAB鉄限石及びメイングループパラサイト中のタングステン同位体における質量に依存した同位体分別2010
- Author(s)
  深海雄介, 木村純一, 入澤啓太, 横山哲也, 平田岳史
- Organizer
  日本地球惑星連合2010年大会
- Place of Presentation
  幕張メッセ
- Year and Date
  2010-05-25
- Data Source
  KAKENHI-PROJECT-21740388
[Presentation] 液中レーザーアブレーションの局所同位体分析への利用2010
- Author(s)
  岡林識起, 横山隆臣, 横山哲也, 平田岳史
- Organizer
  2010年度質量分析学会同位体比部会
- Place of Presentation
  別府
- Year and Date
  2010-11-18
- Data Source
  KAKENHI-PROJECT-22244069
[Presentation] 液中レーザーアブレーションの局所同位体分析への利用2010
- Author(s)
  岡林識起, 横山隆臣, 横山哲也, 平田岳史
- Organizer
  2010年度質量分析学会同位体比部会
- Place of Presentation
  別府
- Year and Date
  2010-11-18
- Data Source
  KAKENHI-PROJECT-21740388
[Presentation] ジルコン中の放射壊変系列核種の分析2009
- Author(s)
  平田岳史, 折橋裕二, 岡林識起, 横山隆臣, 横山哲也
- Organizer
  2009年度日本地球化学会年会
- Place of Presentation
  広島大学
- Year and Date
  2009-09-17
- Data Source
  KAKENHI-PROJECT-21740388
[Presentation] 始原的隕石の耐酸性残渣におけるOs同位体異常2009
- Author(s)
  横山哲也, Alexander, C.M.O'D., Walker, R.J.
- Organizer
  2009年度日本地球化学会年会
- Place of Presentation
  広島大学
- Year and Date
  2009-09-15
- Data Source
  KAKENHI-PROJECT-21740388
[Presentation] 金属標準試料の合成とその均一性の評価2009
- Author(s)
  今井崇暢, 横山隆臣, 横山哲也, 竹山雅夫, 高橋栄一, 平田岳史
- Organizer
  2009年度日本地球化学会年会
- Place of Presentation
  広島大学
- Year and Date
  2009-09-15
- Data Source
  KAKENHI-PROJECT-21740388
[Presentation] 血液中のカルシウム化学種形態分離と同位体分析2009
- Author(s)
  千先治樹, 田中佑樹, 山崎絵里香, 横山哲也, 大野剛, 松川岳久, 篠原厚子, 千葉百子, 横山和仁, 平田岳史
- Organizer
  質量分析学会同位体比部会
- Place of Presentation
  箱根
- Year and Date
  2009-12-02
- Data Source
  KAKENHI-PROJECT-21740388
[Presentation] 局所同位体分析のための新しいレーザーサンプリング法の開発2009
- Author(s)
  岡林識起, 横山隆臣, 山本伸次, 横山哲也, 平田岳史
- Organizer
  質量分析学会同位体比部会
- Place of Presentation
  箱根
- Year and Date
  2009-12-02
- Data Source
  KAKENHI-PROJECT-21740388
[Presentation] 親鉄性元素分析のための金属標準試料の合成2009
- Author(s)
  横山隆臣, 平田岳史, 今井崇暢, 横山哲也, 高橋栄一, 鈴木敏弘, 竹山雅夫
- Organizer
  質量分析学会同位体比部会
- Place of Presentation
  箱根
- Year and Date
  2009-12-03
- Data Source
  KAKENHI-PROJECT-21740388
[Presentation] IIIAB鉄隕石中のタングステン安定同位体分析2009
- Author(s)
  深海雄介, 入澤啓太, 木村純一, 横山哲也, 平田岳史
- Organizer
  質量分析学会同位体比部会
- Place of Presentation
  箱根
- Year and Date
  2009-12-02
- Data Source
  KAKENHI-PROJECT-21740388
[Presentation] 局所同位体分析のための新しいレーザーサンプリング法の開発2009
- Author(s)
  岡林識起, 横山隆臣, 山本伸次, 横山哲也, 平田岳史
- Organizer
  質量分析学会同位体比部会
- Place of Presentation
  箱根
- Year and Date
  2009-12-02
- Data Source
  KAKENHI-PLANNED-21109006
[Presentation] Geochemical characteristics of non-volcanic arima hot spring waters,　southwest japan: possible origin from subducting slab
- Author(s)
  H. Nakamura, H. Iwamori, Chiho Kusuda, Yoshiyuki Fujita, Shun-Ichi Nakai,Tetsuya Yokoyama and Kohei Kazahaya
- Organizer
  Geofluid-3, International symposium
- Place of Presentation
  東京工業大学、東京都
- Data Source
  KAKENHI-PLANNED-21109006
[Presentation] 中国北東部・長白山火山におけるマントル含水量
- Author(s)
  栗谷豪，奥村聡，横山哲也，伊藤嘉紀，中村美千彦，魏海泉
- Organizer
  日本鉱物科学会 2014年年会
- Place of Presentation
  熊本大学黒髪キャンパス（熊本県熊本市）
- Year and Date
  2014-09-17 – 2014-09-19
- Data Source
  KAKENHI-PROJECT-25287144
[Presentation] プレソーラー粒子のU/Th比および238U/235U比の測定に向けた極微量U・Th同位体測定技術の開発
- Author(s)
  渡辺龍哉　横山哲也
- Organizer
  日本地球化学会
- Place of Presentation
  九州大学箱崎キャンパス（福岡県）
- Data Source
  KAKENHI-PROJECT-23340171
[Presentation] Allende 隕石の耐酸性残渣中のテルル同位体異常
- Author(s)
  深海雄介、横山哲也、奥井航
- Organizer
  2014年度日本地球化学会年会
- Place of Presentation
  富山大学五福キャンパス（富山県富山市）
- Year and Date
  2014-09-16 – 2014-09-18
- Data Source
  KAKENHI-PROJECT-23224012
[Presentation] Molybdenum isotope anomalies in Allende and Murchison meteorites
- Author(s)
  Nagai, Y. and Yokoyama, T.
- Organizer
  Lunar and Planetary Science Conference
- Place of Presentation
  The Woodlands, Texas, USA
- Data Source
  KAKENHI-PROJECT-23340171
[Presentation] Tellurium isotope compositions in sequential acid leaching samples of carbonaceous chondrites
- Author(s)
  Fukami, Y., Yokoyama, T. and Okui, W.
- Organizer
  Lunar and Planetary Science Conference
- Place of Presentation
  The Woodlands, Texas, USA
- Data Source
  KAKENHI-PROJECT-23340171
[Presentation] Stellar Nucleosynthesis and Isotope Anomalies in Geologic Samples
- Author(s)
  Yokoyama, T.
- Organizer
  日本地球惑星科学連合大会
- Place of Presentation
  幕張メッセ（千葉県）
- Data Source
  KAKENHI-PROJECT-23340171
[Presentation] ダブルスパイクを用いた隕石試料の高精度84Sr/86Srおよび88Sr/86Sr比分析法の開発
- Author(s)
  奥井航　横山哲也
- Organizer
  日本地球化学会
- Place of Presentation
  九州大学箱崎キャンパス（福岡県）
- Data Source
  KAKENHI-PROJECT-23340171
[Presentation] Os stable isotopes and platinum group elements in Ediacaran and Mesozoic deep-sea sediments
- Author(s)
  Nakane, F., Yokoyama, T. and Maruyama, S.
- Organizer
  日本地球惑星科学連合大会
- Place of Presentation
  幕張メッセ（千葉県）
- Data Source
  KAKENHI-PROJECT-23340171
[Presentation] Strontium stable isotopic anomalies in primitive meteorites and chondrules
- Author(s)
  Okui, W. and Yokoyama, T.
- Organizer
  Lunar and Planetary Science Conference
- Place of Presentation
  The Woodlands, Texas, USA
- Data Source
  KAKENHI-PROJECT-23340171
[Presentation] 東北日本火山岩の238U-230Th放射非平衡
- Author(s)
  横山哲也　岩森光　上木賢太
- Organizer
  日本地球化学会
- Place of Presentation
  九州大学箱崎キャンパス（福岡県）
- Data Source
  KAKENHI-PROJECT-23340171
[Presentation] Determination of osmium isotope compositions in metal phases from CB chondrites using a micro sampling technique
- Author(s)
  Nakanishi, N., Yokoyama, T. and Usui, T.
- Organizer
  Lunar and Planetary Science Conference
- Place of Presentation
  The Woodlands, Texas, USA
- Data Source
  KAKENHI-PROJECT-23340171
[Presentation] 始原的なコンドライト隕石における超高精度
- Author(s)
  永井友一朗　横山哲也　Richard J. Walker
- Organizer
  日本地球化学会
- Place of Presentation
  九州大学箱崎キャンパス（福岡県）
- Data Source
  KAKENHI-PROJECT-23340171
[Presentation] Geochemical study of the Oku Volcanic Group lavas, the Cameroon Volcanic Line, west Cameroon: Preliminary results from eight mafic lavas
- Author(s)
  Asaah, A.N.E., Yokoyama, T., Usui, T., Aka, F.T. and Kusakabe, M.
- Organizer
  日本地球化学会
- Place of Presentation
  九州大学箱崎キャンパス（福岡県）
- Data Source
  KAKENHI-PROJECT-23340171
[Presentation] 東北日本火山岩の238U-230Th放射非平衡
- Author(s)
  横山哲也、岩森光、上木賢太
- Organizer
  日本地球化学会年会
- Place of Presentation
  九州大学、福岡県
- Data Source
  KAKENHI-PLANNED-21109006
[Presentation] Triton-plusを用いた超高精度142Nd/144Nd比測定法の開発
- Author(s)
  高橋宏和　横山哲也
- Organizer
  日本地球化学会
- Place of Presentation
  九州大学箱崎キャンパス（福岡県）
- Data Source
  KAKENHI-PROJECT-23340171
[Presentation] Origin of U-Th Disequilibrium in Subduction Zone Volcanic Rocks
- Author(s)
  Yokoyama, T., Ikemoto, A., Iwamori, H. and Ueki, K.
- Organizer
  Geofluid 3 International Symposium
- Place of Presentation
  東京工業大学デジタル多目的ホール
- Invited
- Data Source
  KAKENHI-ORGANIZER-21109001
[Presentation] Three-Dimensional External Shape and Internal Structure of Chondrules in Allende CV3 Chondrite
- Author(s)
  Nakamoto, T., Takahashi, A. Tsuda, K. Nishida, W. Okui, T. Yokoyama, Y. Yanagida, S. Okumura, M. Nakamura, and O. Sasaki
- Organizer
  Annual Meeting of Meteoritical Society
- Place of Presentation
  モロッコ，カサブランカ
- Year and Date
  2014-09-08 – 2014-09-12
- Data Source
  KAKENHI-PROJECT-24340102
[Presentation] U-series isotope disequilibrium in subduction zone volcanic rocks
- Author(s)
  Yokoyama, T.
- Organizer
  Muon and Neutrino Radiography2013
- Place of Presentation
  庭のホテル、東京都
- Data Source
  KAKENHI-PLANNED-21109006
[Presentation] Stellar Nucleosynthesis and Isotope Anomalies in Geologic Samples
- Author(s)
  Yokoyama, T.
- Organizer
  日本地球惑星科学連合2012年大会
- Place of Presentation
  幕張メッセ、千葉県
- Data Source
  KAKENHI-PLANNED-21109006
[Presentation] U-series isotope disequilibrium in subduction zone volcanic rocks
- Author(s)
  Yokoyama, T.
- Organizer
  MNR 2013
- Place of Presentation
  東京工業大学デジタル多目的ホール
- Invited
- Data Source
  KAKENHI-ORGANIZER-21109001
[Presentation] アエンデ隕石中コンドリュールの3次元外形と内部組織の分析
- Author(s)
  中本泰史, 高橋栄一, 津田彩花, 西田圭佑, 奥井航, 横山哲也, 柳田泰宏, 奥村聡, 中村美千彦, 佐々木理
- Organizer
  日本惑星科学会秋季講演会
- Place of Presentation
  東北大学，仙台
- Year and Date
  2014-09-24 – 2014-09-26
- Data Source
  KAKENHI-PROJECT-24340102
[Presentation] 中国北東部・長白山火山におけるマントル含水量：予察的検討
- Author(s)
  栗谷豪，奥村聡，横山哲也，伊藤嘉紀，中村美千彦，魏海泉
- Organizer
  日本地球惑星科学連合2014年大会
- Place of Presentation
  パシフィコ横浜（神奈川県横浜市）
- Year and Date
  2014-04-28 – 2014-05-02
- Data Source
  KAKENHI-PROJECT-25287144
[Presentation] Strontium isotope anomalies and 26Al-26Mg chronology in CAIs from CV chondrites
- Author(s)
  Myojo, K., Yokoyama, T., Sano, Y., Takahata, N. and Sugiura, N.
- Organizer
  Lunar and Planetary Science Conference
- Place of Presentation
  The Woodlands, Texas, USA
- Data Source
  KAKENHI-PROJECT-23340171
[Presentation] Origin of U-Th Disequilibrium in Subduction Zone Volcanic Rocks
- Author(s)
  Yokoyama, T., Ikemoto, A., Iwamori, H. and Ueki, K.
- Organizer
  Geofluid-3, International symposium
- Place of Presentation
  東京工業大学、東京都
- Data Source
  KAKENHI-PLANNED-21109006

1. IWAMORI Hikaru (80221795)

# of Collaborated Projects: 5 results

# of Collaborated Products: 6 results
2. NAKAMURA Hitomi (60572659)

# of Collaborated Projects: 4 results

# of Collaborated Products: 4 results
3. NAKAMOTO Taishi (60261757)

# of Collaborated Projects: 4 results

# of Collaborated Products: 5 results
4. Ishikawa Akira (20524507)

# of Collaborated Projects: 4 results

# of Collaborated Products: 40 results
5. HIRATA Takafumi (10251612)

# of Collaborated Projects: 3 results

# of Collaborated Products: 8 results
6. Tsujimoto Takuji (10270456)

# of Collaborated Projects: 3 results

# of Collaborated Products: 9 results
7. KURITA Kei (00111451)

# of Collaborated Projects: 2 results

# of Collaborated Products: 0 results
8. NAKAMURA Michihiko (70260528)

# of Collaborated Projects: 2 results

# of Collaborated Products: 2 results
9. Maruyama Shigenori (50111737)

# of Collaborated Projects: 2 results

# of Collaborated Products: 1 results
10. OMORI Soichi (90267469)

# of Collaborated Projects: 2 results

# of Collaborated Products: 0 results
11. Kuritani Takeshi (80397900)

# of Collaborated Projects: 2 results

# of Collaborated Products: 5 results
12. KOMIYA Tsuyoshi (30361786)

# of Collaborated Projects: 2 results

# of Collaborated Products: 4 results
13. 片山郁夫 (10448235)

# of Collaborated Projects: 2 results

# of Collaborated Products: 1 results
14. 石塚治 (90356444)

# of Collaborated Projects: 2 results

# of Collaborated Products: 0 results
15. 奥住聡 (60704533)

# of Collaborated Projects: 2 results

# of Collaborated Products: 0 results
16. 西澤達治 (80826579)

# of Collaborated Projects: 2 results

# of Collaborated Products: 0 results
17. TAKAHASHI Eiichi (40144779)

# of Collaborated Projects: 1 results

# of Collaborated Products: 1 results
18. KAWAMURA Katsuyuki (00126038)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
19. MATSUZAWA Tooru (20190449)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
20. OGAWA Yasuo (10334525)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
21. KOGISO Tetsu (60359172)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
22. HAMADA Morihisa (60456853)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
23. SAKUMA Hiroshi (20400426)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
24. KAZAHAYA Kohei (50356763)

# of Collaborated Projects: 1 results

# of Collaborated Products: 1 results
25. TANIMIZU Masaharu (20373459)

# of Collaborated Projects: 1 results

# of Collaborated Products: 1 results
26. KATO Yasuhiro (40221882)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
27. TOKUNAGA Tomochika (70237072)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
28. KIMURA Jun-ichi (30241730)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
29. FUJINAGA Koichiro (90409673)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
30. KAWAI Kenji (20432007)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
31. SENSHU Hiroki (30359202)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
32. ZHAO Dapeng (70304665)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
33. KOMABAYASHI Tetsuya (20444119)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
34. YOKOYAMA Tetsuya (00667028)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
35. Hanyu Takeshi (50359197)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
36. 飯塚毅 (70614569)

# of Collaborated Projects: 1 results

# of Collaborated Products: 1 results
37. 吉田晶樹 (00371716)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
38. 澤木佑介 (00635063)

# of Collaborated Projects: 1 results

# of Collaborated Products: 4 results
39. 鳴海一成 (90343920)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
40. ドームジェームズ (30723671)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
41. 丹下慶範 (70543164)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
42. 玄田英典 (90456260)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
43. 角野浩史 (90332593)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
44. 佐藤峰南 (20773394)

# of Collaborated Projects: 1 results

# of Collaborated Products: 1 results
45. 渡慶次聡 (30516654)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
46. 羽場麻希子 (30598438)

# of Collaborated Projects: 1 results

# of Collaborated Products: 2 results
47. 深井稜汰 (10848469)

# of Collaborated Projects: 1 results

# of Collaborated Products: 6 results
48. 井田茂 (60211736)

# of Collaborated Projects: 1 results

# of Collaborated Products: 2 results
49. Shimizu Kenji

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
50. Ozawa Takahiro

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
51. Tatiana Churikova

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
52. Boris Gordeychik

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
53. Asobo Asaah

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
54. Festus T. Aka

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
55. TACHIBANA Shogo

# of Collaborated Projects: 0 results

# of Collaborated Products: 1 results
56. HASEGAWA Takeshi

# of Collaborated Projects: 0 results

# of Collaborated Products: 2 results
57. YABUTA Hikaru

# of Collaborated Projects: 0 results

# of Collaborated Products: 4 results
58. NAKAMURA Kentaro

# of Collaborated Projects: 0 results

# of Collaborated Products: 1 results
59. 高橋嘉夫

# of Collaborated Projects: 0 results

# of Collaborated Products: 1 results
60. 中田亮一

# of Collaborated Projects: 0 results

# of Collaborated Products: 1 results
61. 若木重行

# of Collaborated Projects: 0 results

# of Collaborated Products: 1 results
62. 臼井寛裕

# of Collaborated Projects: 0 results

# of Collaborated Products: 4 results
63. 上野雄一郎

# of Collaborated Projects: 0 results

# of Collaborated Products: 1 results

Yokoyama Tetsuya 横山 哲也

YOKOYAMA Tetsuya 横山 哲也

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Meteoritic and theoretical studies on the origin of isotopic dichotomy in meteoritesPrincipal Investigator

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Multi-isotopic analyses of the samples returned from Ryugu: Toward the comprehensive understanding of the origin and formation history of C-type asteroidsPrincipal Investigator

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Chemical and isotopic analyses of asteroid samples returned by Hayabusa2 missionPrincipal Investigator

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Construction of Earth formation model by isotopic analysis of siderophile elements in meteorites and Archean igneous rocksPrincipal Investigator

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隕石の超高精度Mo同位体分析による地球の水の起源に関する研究Principal Investigator

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Decoding the origin of solar system from the isotope anomalies of heavy elements in meteoritesPrincipal Investigator

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Dating of presolar grains by nuclear cosmochronologyPrincipal Investigator

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Yokoyama Tetsuya 横山哲也

YOKOYAMA Tetsuya 横山哲也