2011 Fiscal Year Annual Research Report
Project Area | New perspective of great subduction-zone earthquakes from the super deep drilling |
Project/Area Number |
21107004
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Research Institution | Chiba University |
Principal Investigator |
金川 久一 千葉大学, 大学院・理学研究科, 教授 (40185898)
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Co-Investigator(Kenkyū-buntansha) |
堤 昭人 京都大学, 大学院・理学研究科, 助教 (90324607)
高橋 美紀 産業技術総合研究所, 活断層地震研究センター, 研究員 (40470033)
廣瀬 丈洋 海洋研究開発機構, 高知コア研究所, 主任研究員 (40470124)
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Keywords | 南海トラフ地震発生帯 / 掘削試料 / 破壊実験 / 摩擦実験 / 透水実験 |
Research Abstract |
1)IODP Exp.315、掘削地点C0002の海底下約1000mから採取されたタービダイト起源の泥質堆積物と半遠洋性泥質堆積物の2試料について、室温、原位置圧力・間隙圧、軸方向の変位速度0.1~10μm/sの低速三軸摩擦実験を行った結果、前者は摩擦強度が大きく(摩擦係数約0.53)摩擦強度がほぼ一定の定常すべりの挙動を示し、一方後者は摩擦強度が小さく(摩擦係数約0.25)すべり軟化の挙動を示した。また、両試料とも変位速度の増加に伴い摩擦強度が増加する速度強化の挙動を示すが、半遠洋性泥質堆積物試料の方がより顕著な速度強化の挙動を示すことが明らかとなった。 2)IODP Exp.316、掘削地点C0007の前縁衝上断層帯より採取された4試料について、垂直応力1MPa、含水条件、変位速度25~250μm/sの中速回転剪断摩擦実験を行った結果、全試料が摩擦強度が小さく(摩擦係数約0.2~0.27)速度強化の挙動を示すことが明らかになった。 3)IODP Exp.316、掘削地点C0004の泥質堆積物試料を垂直応力1MPa、含水条件で高速回転剪断摩擦実験を行い、変位速度0.13mm/sから異なる加速度(0.13~13m/s^2)で変位速度を加速させた結果,加速度が大きいと(>1.3m/s^2)、変位速度の増加とともに顕著な摩擦のバリア(速度強化)が現れた。また、動的な強度低下が起こり始める臨界すべり速度も、加速度の上昇とともに大きくなる傾向が認められた。 4)IODP Exp.316、掘削地点C0004の分岐断層帯と掘削地点C0007の前縁衝上断層帯の試料を用いて、垂直応力1MPa、変位速度0.013,1.05m/sの摩擦実験前後の透水係数を測定した結果、含水条件では摩擦実験後、断層ガウジの透水係数は減少し、変位速度が小さい場合に透水係数が大きく減少した。逆に無水条件では摩擦実験後、断層ガウジの透水係数は増加し、変位速度が大きい場合に透水係数が大きく増加した。
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Current Status of Research Progress |
Current Status of Research Progress
2: Research has progressed on the whole more than it was originally planned.
Reason
これまで研究は順調に推移しており、付加体浅部の力学的・水理学的な挙動が明らかとなってきた。中間評価においても期待以上の実績を挙げたと高い評価を受けた。
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Strategy for Future Research Activity |
南海トラフ付加体深部掘削試料、および巨大分岐断層・プレート境界断層試料の変形・透水実験は、IODP掘削計画の遅れと変更により、当初計画通りの実施が困難となった。そこで、平成24年度以後は、既存の付加体浅部掘削試料を使用して、想定される付加体深部の様々な温度・圧力・間隙水圧条件において変形・透水実験を行い、その結果に基づいて付加体深部の力学的・水理学的性質を推定する予定である。また、新たに東北地方太平洋沖地震の震源断層浅部掘削が計画されたため、その掘削試料の変形・透水実験も実施する予定である。
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[Journal Article] Velocity dependence of shear-induced permeability associated with frictional behavior in fault zones of the Nankai subduction zone2012
Author(s)
Tanikawa, W., Mukoyoshi, H., Tadai, O., Hirose, T., Tsutsumi, A. and Lin, W.
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Journal Title
Journal of Geophysical Research
Volume: 117
Pages: B05405, 1-16
DOI
Peer Reviewed
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[Journal Article] Internal structure of Longmenshan fault zone at Hongkou outcrop, Sichuan, China, that caused the 2008 Wenchuan earthquake2011
Author(s)
Togo, T., Shimamoto, T., Ma, S., Wen, X., He, H.
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Journal Title
Earthquake Science
Volume: 24
Pages: 249-265
DOI
Peer Reviewed
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[Journal Article] Low- to high-velocity frictional properties of the clay-rich gouges from the slipping zone of the 1963 Vaiont slide (Northern Italy)2011
Author(s)
Ferri, F., Di Toro, G., Hirose, T., Han, R., Noda, H., Shimamoto, T., Quaresimin, M., de Rossi, N.
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Journal Title
Journal of Geophysical Research
Volume: 116
Pages: B09208-1-B09208-17
DOI
Peer Reviewed
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[Journal Article] The geochemical signature caused by earthquake propagation in carbonate-hosted faults2011
Author(s)
De Paola, N., Chiodini, G., Hirose, T., Cardellini, C., Caliro, S., Shimamoto, T.
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Journal Title
Earth and Planetary Science Letters
Volume: 310
Pages: 225-232
DOI
Peer Reviewed
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[Journal Article] On the transient response of serpentine (antigorite) gouge to stepwise changes in slip velocity under high-temperature conditions2011
Author(s)
Takahashi, M., Uehara, S.-I., Mizoguchi, K., Shimizu, I., Okazaki, K., Masuda, K.
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Journal Title
Journal of Geophysical Research
Volume: 116
Pages: B10405-1-B10405-25
DOI
Peer Reviewed
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[Journal Article] The landslide stage of the Hsiaolin catastrophe : simulation and validation2011
Author(s)
Kuo, C.Y., Tai, Y.C., Chen, C.C, Chang, K.J., Siau, A.Y., Dong, J.J., Han, R.H., Shimamoto, T., Lee, C.T.
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Journal Title
Journal of Geophysical Research
Volume: 116
Pages: F04007-1-F04007-16
DOI
Peer Reviewed
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[Journal Article] Progressive illitization in fault gouge caused by seismic slip propagation along a megasplay fault in the Nankai Trough2011
Author(s)
Yamaguchi, A., Sakaguchi, A., Sakamoto, T., Iijima, K., Kameda, J., Kimura, G., Ujiie, K., Chester, F.M., Fabbri, O., Goldsby, D., Tsutsumi, A., Li, C.-F., Curewitz, D.
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Journal Title
Geology
Volume: 39
Pages: 995-998
DOI
Peer Reviewed
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[Journal Article] 3D modeling of the cycle of a great Tohoku-oki earthquake, considering frictional behavior at low to high slip velocities2011
Author(s)
Shibazaki, B., Matsuzawa, T., Tsutsumi, A., Ujiie, K., Hasegawa, A., Ito, Y.
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Journal Title
Geophysical Research Letters
Volume: 38
Pages: L21305-1-L21305-6
DOI
Peer Reviewed
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[Presentation] Submarine deposition of fine-grained sediments associated with the 2011 off the Pacific coast of Tohoku Earthquake2012
Author(s)
Arai, K., Naruse, H., Izumi, N., Yokokawa, M., Miura, R., Kawamura, K., Tsuji, T., Tanikawa, W., Kanamatsu, T., Fujikura, K., Murayama, M., YK11-E041egl and YK11-E061eg2 Shipboard Scientists
Organizer
International Conference on a New Perspective of Great Earthquakes along Subduction Zones
Place of Presentation
高知市文化プラザかるぽーと
Year and Date
20120228-20120229
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[Presentation] Sensitivity analyses for slip parameter estimation2012
Author(s)
Hamada, Y., Sakaguchi, A., Tanikawa, W., Yamaguchi, A., Kameda, J., Kimura, G.
Organizer
International Conference on a New Perspective of Great Earthquakes along Subduction Zones
Place of Presentation
高知市文化プラザかるぽーと
Year and Date
20120228-20120229
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[Presentation] Frictional response of accreted sediments to seismic slip propagation along subduction plate boundary faults2012
Author(s)
Hirose, T., Mukoyoshi, H., Tanikawa, W., Lin, W., Tadai, O., Noda, H.
Organizer
International Conference on a New Perspective of Great Earthquakes along Subduction Zones
Place of Presentation
高知市文化プラザかるぽーと
Year and Date
20120228-20120229
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[Presentation] Modeling of the cycle of a great Tohoku-oki earthquake, considering frictional behavior at low to high slip velocities2012
Author(s)
Shibazaki, B., Tsutsumi, A., Ujiie, K., Shimamoto, T., Ito, Y.
Organizer
International Conference on a New Perspective of Great Earthquakes along Subduction Zones
Place of Presentation
高知市文化プラザかるぽーと
Year and Date
20120228-20120229
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[Presentation] Slip velocity dependence of shear-induced permeability of core materials in shallow fault zones of the Nankai subduction zone2012
Author(s)
Tanikawa, W., Hirose, T., Lin, W., Mukoyoshi, H., Tadai, O., Tsutsumi, A.
Organizer
International Conference on a New Perspective of Great Earthquakes along Subduction Zones
Place of Presentation
高知市文化プラザかるぽーと
Year and Date
20120228-20120229
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[Presentation] Amorphization of dolerite gouges and its effects on their frictional properties2012
Author(s)
Wada, J., Kanagawa, K., Nakatani, M., Mochizuki, H., Hirose, T., Ando, J., Furukawa, N., Inoue, A.
Organizer
International Conference on a New Perspective of Great Earthquakes along Subduction Zones
Place of Presentation
高知市文化プラザかるぽーと
Year and Date
20120228-20120229
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[Presentation] New perspective of great subduction zone earthquakes2012
Author(s)
Kimura, G., Park, J.-O., Ashi, J., Kanagawa, K., Kinoshita, M., Ide, S., Saito, S.
Organizer
International Conference on a New Perspective of Great Earthquakes along Subduction Zones
Place of Presentation
高知市文化プラザかるぽーと(invited talk)
Year and Date
2012-02-28
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[Presentation] The influence of slip velocity and temperature on permeability during and after high-velocity fault slip2011
Author(s)
Tanikawa, W., Mukoyoshi, H., Tadai, O., Hirose, T., Lin, W.
Organizer
American Geophysical Union 2011 Fall Meeting
Place of Presentation
Moscone Center, San Francisco, USA
Year and Date
2011-12-08
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[Presentation] Measurements of thermal conductivities under high pressure in NanTroSEIZE sediment core and several terrestrial rock samples2011
Author(s)
Tadai, O., Lin, W., Hirose, T., Tanikawa, W., Mukoyoshi, H., Matsubayashi, O., Kanamatsu, T., Kinoshita, M.
Organizer
American Geophysical Union 2011 Fall Meeting
Place of Presentation
Moscone Center, San Francisco, USA
Year and Date
2011-12-06
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[Presentation] Frictional response of accreted sediments to seismic slip propagation along subduction plate boundary faults2011
Author(s)
Hirose, T., Mukoyoshi, H., Tanikawa, W., Lin, W., Tadai, O., Noda, H.
Organizer
American Geophysical Union 2011 Fall Meeting
Place of Presentation
Moscone Center, San Francisco, USA
Year and Date
2011-12-06
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[Presentation] Difference in mechanical and hydrological properties between hemipelagic and turbidite mudstones cored from the Nankai Trough accretionary prism at Site C0002 of the IODP Expedition 3152011
Author(s)
Takahashi, M., Azuma, S., Uehara, S., Inoue, A., Kanagawa, K.
Organizer
American Geophysical Union 2011 Fall Meeting
Place of Presentation
Moscone Center, San Francisco, USA
Year and Date
2011-12-06
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[Presentation] Comminution and frictional melting in volcanic conduits2011
Author(s)
Lavallee, Y., Mitchell, T.M., Heap, M.J., Kendrick, J.E., Kennedy, B., Ashwell, P.A., Hirose, T., Dingwell, D.B.
Organizer
American Geophysical Union 2011 Fall Meeting
Place of Presentation
Moscone Center, San Francisco, USA
Year and Date
2011-12-06
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[Presentation] Progressive illitization in fault gouge caused by seismic slip propagation along a megasplay fault in the Nankai Trough2011
Author(s)
Yamaguchi, A., Sakaguchi, A., Kameda, J., Hamada, Y., Kimura, G., Sakamoto, T., Iijima, K., Ujiie, K., Chester, F.M., Fabbri, O., Goldsby, D.L., Tsutsumi, A., Curewitz, D.
Organizer
American Geophysical Union 2011 Fall Meeting
Place of Presentation
Moscone Center, San Francisco, USA
Year and Date
2011-12-05
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[Presentation] Dehydration softening of serpentine as a trigger of intermediate-depth earthquakes2011
Author(s)
Shimizu, I., Watanabe, Y., Michibayashi, K., Uehara, S., Takahashi, M., Katsuta, N.
Organizer
American Geophysical Union 2011 Fall Meeting
Place of Presentation
Moscone Center, San Francisco, USA
Year and Date
2011-12-05
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[Presentation] Turbidity anomaly and probability of slope failure following the 2011 Great Tohoku Earthquake2011
Author(s)
Noguchi, T., Tanikawa, W., Hirose, T., Lin, W., Kawagucci, S., Yoshida, Y., Honda, M.C, Takai, K., Kitazato, H., Okamura, K.
Organizer
American Geophysical Union 2011 Fall Meeting
Place of Presentation
Moscone Center, San Francisco, USA
Year and Date
2011-12-05
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[Presentation] Internal structures and high-velocity frictional properties of Longmenshan fault zone at Pingxi outcrop, Sichuan, China2011
Author(s)
Yao, L., Shimamoto, T., Ma, S., Chen, J., Togo, T.
Organizer
Asia Oceania Geosciences Society 8^<th> Annual General Meeting
Place of Presentation
台北國際會議中心,台湾
Year and Date
2011-08-11
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[Presentation] Evaluating the kinematics of a catastrophic rock slide using the rigid block analysis and a velocity-displacement dependent friction law2011
Author(s)
Yu, W.L., Dong, J.J., Miyamoto, Y., Shimamoto, T., Lee, C.T.
Organizer
Asia Oceania Geosciences Society 8^<th> Annual General Meeting
Place of Presentation
台北國際會議中心,台湾
Year and Date
2011-08-11
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[Presentation] Low to high velocity frictional properties of the clay-rich gouges from the slipping zone of the giant 1963 Vaiont landslide (Italy)2011
Author(s)
Ferri, F., Di Toro, G., Hirose, T., Han, R., Noda, H., Shimamoto, T., Quaresimin, M., De Rossi, N.
Organizer
Asia Oceania Geosciences Society 8^<th> Annual General Meeting
Place of Presentation
台北國際會議中心,台湾
Year and Date
2011-08-10
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[Presentation] Tsaoling and Jiefengershan landslides : two catastrophic landslides triggered by 1999 Taiwan Chi-Chi earthquakes as studied by high velocity friction experiments2011
Author(s)
Togo, T., Shimamoto, T., Oohashi, K., Miyamoto, Y., Yano, K., Dong, J.J., Lee, C.T.
Organizer
Asia Oceania Geosciences Society 8^<th> Annual General Meeting
Place of Presentation
台北國際會議中心,台湾
Year and Date
2011-08-10
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[Presentation] Frictional melt generated from similar & dissimilar volcanic and sedimentary rocks2011
Author(s)
Mitchell, T., Heap, M., Lavallee, Y., Hirose, T., Dingwell, D., Vinciguerra, S., Renner, J., Cavallo, A.
Organizer
European Geosciences Union General Assembly 2011
Place of Presentation
Austria Center, Vienna, Austria
Year and Date
2011-04-06
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[Presentation] Talc lubrication of faults at seismic velocities : an experimental approach2011
Author(s)
Boutareaud, S., Hirose, T., Doan, M.L., Andreani, M., Calugaru, D.G., Pec, M., Boullier, A.M., Kunze, K., Cordonnier, B.
Organizer
European Geosciences Union General Assembly 2011
Place of Presentation
Austria Center, Vienna, Austria
Year and Date
2011-04-05
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[Presentation] Fault lubrication during earthquakes2011
Author(s)
Di Toro, G., Han, R., Hirose, T., De Paola, N., Nielsen, S., Mizoguchi, K., Ferri, F., Cocco, M., Shimamoto, T.
Organizer
European Geosciences Union General Assembly 2011
Place of Presentation
Austria Center, Vienna, Austria
Year and Date
2011-04-04
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[Presentation] The geochemical signature of carbonate-hosted seismogenic faults2011
Author(s)
De Paola, N., Chiodini, G., Hirose, T., Cardellini, C., Caliro, S., Shimamoto, T.
Organizer
European Geosciences Union General Assembly 2011
Place of Presentation
Austria Center, Vienna, Austria
Year and Date
2011-04-04
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