2011 Fiscal Year Annual Research Report
高速域における断層強度の変位速度依存性および温度依存性の物質科学的解明
Project/Area Number |
23340151
|
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)
|
Keywords | 断層 / 摩擦強度 / 高温高速摩擦実験 / 変位速度依存性 / 温度依存性 / 物質解析 |
Research Abstract |
1)鉄乳鉢で粉砕してふるいにかけた粒径500μm以下のドレライト粉砕試料をさらに自動瑪惱乳鉢で粉砕し、10分、6時間、12時間、以後12時間毎に60時間まで粉砕した。透過電子顕微鏡観察から、6時間以上粉砕した試料中にはサブミクロンサイズの丸い非晶質粒子が多く含まれることが明らかとなった。粉砕時間36時間までは細粒化と非晶質化が進行し、非晶質物質含有量は約40wt%まで増加するが、粉砕時間が36時間以上になると、粉砕時間が長くなっても非晶質物質含有量量は増減しなくなった。また、走査電子顕微鏡観察から、6時間以上粉砕した試料中には、角ばった破砕粒子を非晶質微粒子がコーティングした丸い粒子が多く含まれることが明らかとなった。この粒子は、火山豆石のように、非晶質物質が水分により破砕粒子に吸着成長して形成されたものと考えられる。粉砕時間の増加に伴い、この丸い粒子の量は増加する傾向にある。 2)東京大学地震研究所の二軸試験機を使用して、垂直応力約7MPa、変位速度1,10μm/sでステップ状に変化させながら摩擦実験を行った結果、非晶質物質を全く含まない10分間粉砕試料の摩擦係数(約0.6)に比べて非晶質物質を約40wt%含む36時間粉砕試料の摩擦係数(約0。55)が小さく、非晶質物質の存在により摩擦強度が低下することが明らかとなった。また、10分間粉砕試料は速度弱化の挙動を示すのに対し、36時間粉砕試料は摩擦強度の変位速度依存性が中立に近く、非晶質物質の存在により摩擦強度の変位速度依存性も変化することが明らかとなった。
|
Current Status of Research Progress |
Current Status of Research Progress
3: Progress in research has been slightly delayed.
Reason
東京大学地震研究所二軸試験機の調整不足により良質な摩擦実験データが得られず、また2試料のみしか摩擦実験が実施できなかったため。
|
Strategy for Future Research Activity |
前述のように、今年度は東京大学地震研究所の二軸試験機の調整不足により、ドレライト粉砕試料の良質な摩擦実験データが得られなかった。このため、来年度は点検・調整が終了した千葉大学の高温高速摩擦試験機を使用して摩擦実験を行い、非晶質物質含有量と摩擦強度との関係を明らかにする予定である。 また、ドレライト試料の摩擦強度の変位速度依存性と温度依存性を調べる実験を、点検・調整が千葉大学の高温高速摩擦試験機を使用して来年度から本格的に開始する予定である。
|
Research Products
(76 results)
-
-
-
-
[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., Lin, W.
-
Journal Title
Journal of Geophysical Research
Volume: 117(印刷中)
DOI
Peer Reviewed
-
-
-
-
-
-
-
-
-
-
[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.
-
Journal Title
Journal of Geophysical Research
Volume: 116
Pages: B09208-1-17
DOI
Peer Reviewed
-
[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.
-
Journal Title
Earth and Planetary Science Letters
Volume: 310
Pages: 225-232
DOI
Peer Reviewed
-
-
[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
-
-
-
-
-
-
-
-
[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
-
-
[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
-
-
[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
-
-
-
[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
-
-
-
[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
-
-
[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
-
[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
-
[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
-
-
[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
-
-
-
-
-
-
-
-
-
-
-
-
-
-
[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
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
[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
-
[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
-
[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
-
[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
-