2011 Fiscal Year Final Research Report
Effects of dehydration of clay minerals on seismic slip
| Project/Area Number |
21340150
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Geology
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| Research Institution | University of Tsukuba (2010-2011)
Japan Agency for Marine-Earth Science and Technology (2009) |
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Principal Investigator |
UJIIE Kohtaro 筑波大学, 生命環境系, 准教授 (40359188)
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| Co-Investigator(Kenkyū-buntansha) |
TSUTSUMI Akito 京都大学, 大学院・理学研究科, 助教 (90324607)
HIRANO Nobuo 東北大学, 大学院・環境科学研究科, 助教 (80344688)
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| Co-Investigator(Renkei-kenkyūsha) |
HIRONO Tetsuro 大阪大学, 大学院・理学研究科, 准教授 (70371713)
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| Project Period (FY) |
2009 – 2011
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| Keywords | 地震すべり / 摩擦発熱 / 粘土質断層ガウジ / すべり弱化 / 流動化 |
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| Research Abstract |
Faults are commonly dominated by clay minerals. To understand frictional response associated with rupture propagation from deep depths, we conducted high-velocity friction experiments on clay-rich fault material. The results show that the frictional strength decreases with displacement due to dehydration of clay minerals. This would enhance rupture propagation toward seafloor and tsunami generation.
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