2009 Fiscal Year Final Research Report
Slip zone dynamics-inversion analysis from intra-slip-zone materials
| Project/Area Number |
19340120
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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 |
Solid earth and planetary physics
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| Research Institution | The University of Tokyo |
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Principal Investigator |
TANAKA Hidemi The University of Tokyo, 大学院・理学系研究科, 講師 (40236625)
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| Project Period (FY) |
2007 – 2009
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| Keywords | 断層 / 地震滑り / 車籠埔断層 / 集集地震 / 断層内物質 |
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| Research Abstract |
Mode of energy dissipation by an large earthquake is examined by using drilled core penetrating the Chelung-pu Fault, being activated by 1996 Chi-chi earthquake, Taiwan. Total dissipated energy was simply assumed as sum of heat energy by friction and fracture energy by pulverization of mineral grains contained in the slip zone. Progress of analysis clarified, however, chemical process, such as dissolution-precipitation is dominantly activated by grain comminution. Dynamic chemical process activated by reaction between intra-slip zone fluid and comminuted grains is an as-yet-unrecognized factor. We are trying to solve chemical process during seismic slip.
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