Experimental study on mechanical properties of plate interface of the northeastern Japan subduction zone
Project/Area Number |
24244077
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Research Category |
Grant-in-Aid for Scientific Research (A)
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Allocation Type | Single-year Grants |
Section | 一般 |
Research Field |
Geology
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Research Institution | Tohoku University |
Principal Investigator |
NAGAHAMA Hiroyuki 東北大学, 理学(系)研究科(研究院), 教授 (60237550)
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Co-Investigator(Kenkyū-buntansha) |
MUTO Jun 東北大学, 大学院理学研究科, 助教 (40545787)
NAGASE Toshiro 東北大学, 学術資源公開センター, 准教授 (10237521)
SHIMIZU Ichiko 東京大学, 大学院理学系研究科, 助教 (40211966)
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Project Period (FY) |
2012-04-01 – 2015-03-31
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Project Status |
Completed (Fiscal Year 2014)
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Budget Amount *help |
¥35,620,000 (Direct Cost: ¥27,400,000、Indirect Cost: ¥8,220,000)
Fiscal Year 2014: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2013: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2012: ¥25,090,000 (Direct Cost: ¥19,300,000、Indirect Cost: ¥5,790,000)
|
Keywords | 東北地方太平洋沖地震 / 沈み込み帯 / プレート境界地震 / レオロジー / 余効変動 / 岩石力学 / 固体圧岩石変形試験機 / ガス圧岩石変形試験機 / 東北日本 / 岩石変形実験 / 東北沖地震 / 地殻変動 / ガス圧試験機 |
Outline of Final Research Achievements |
In order to reveal the mechanism of the 2011 Tohoku Oki earthquake and subsequent post-seismic deformation of the northeastern Japan, we have conducted deformation experiments of a wide variety of rocks composing subduction zones. By the friction experiments using gas rig, frictional stability of quartz gouge is observed to be correlated to energy ratio of the gouge controlled by internal structure of gouges. Moreover, rupture velocity of serpentinites and olivine gouges depends on the their frictional coefficients and normal stress, implying that the slow slip in subduction zones illuminates the stress state of the plate boundary. By the shear experiments using Griggs rig, deformation mechanisms and creep strengths of feldspars are significantly reduced by the presence of water added externally into the samples under the lower crustal condition. We also proposed rheological models of the NE Japan island arc-trench systems and plate boundary causing the 2011 Tohoku Oki earthquake.
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Report
(4 results)
Research Products
(44 results)
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[Journal Article] Rheological properties of the detachment shear zone of an oceanic core complex inferred by plagioclase flow law: Godzilla Megamullion, Parece Vela back-arc basin, Philippine Sea.2014
Author(s)
K. Michibayashi, Harigane, Y., Obara, Y., Muto, J., Okamoto, A.
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Journal Title
Earth and Planetary Science Letters
Volume: 408
Pages: 16-23
DOI
Related Report
Peer Reviewed
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[Journal Article] Imaging of internal stress around a mineral inclusion in a sapphire crystal: Application of micro-Raman and photoluminescence spectroscopy2013
Author(s)
Noguchi, N., Abduriyim, A., Shimizu, I., Kamegata, N., Odake, S. and Kagi, H.
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Journal Title
Journal of Raman Spectroscopy
Volume: 44
Issue: 1
Pages: 147-154
DOI
Related Report
Peer Reviewed
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[Journal Article] Shimazakiite-4M and shimazakiite-4O, Ca2B2O5, two polytypes of a new mineral from Fuka, Okayama Prefecture, Japan2013
Author(s)
Kusachi, I., Kobayashi, S., Takeuchi, Y., Nakamuta, Y., Nagase, T., Yokoyama, K., Momma, K., Miyawaki, R., Shigeoka, M., Matsubara, S.
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Journal Title
Mineralogical Magazine
Volume: Vol. 77
Pages: 93-105
Related Report
Peer Reviewed
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[Journal Article] Texture of lutecite2013
Author(s)
Nagase,T., Momma, K., Kuribayashi, T., Tanaka, M.
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Journal Title
Journal of Mineralogical and Petrological Sciences
Volume: Vol. 108
NAID
Related Report
Peer Reviewed
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[Journal Article] Amorphization of quartz by friction: Implication to silica-gellubrication of fault surfaces2012
Author(s)
Nakamura, Y., Muto, J., Nagahama, H., Shimizu, I., Miura, T., Arakawa, I..
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Journal Title
Geophysical Research Letter
Volume: 39
Issue: 21
Pages: 53228-53228
DOI
Related Report
Peer Reviewed
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[Journal Article] Tanohataite, LiMn<sub>2</sub>Si<sub>3</sub>O<sub>8</sub>(OH): a new mineral from the Tanohata mine, Iwate Prefecture, Japan2012
Author(s)
Nagase, T., Hori, H., Kitamine, M., Nagashima, M., Abduriyim, A., Kuribayashi, T.
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Journal Title
Journal of Mineralogical and Petrological Sciences
Volume: 107
Issue: 3
Pages: 149-154
DOI
NAID
ISSN
1345-6296, 1349-3825
Related Report
Peer Reviewed
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