2011 Fiscal Year Final Research Report
Examination of the basic assumption of stress tensor inversion methods
| Project/Area Number |
21740364
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Geology
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| Research Institution | Kyoto University |
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Principal Investigator |
SATO Katsushi 京都大学, 大学院・理学研究科, 助教 (70509942)
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| Project Period (FY) |
2009 – 2011
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| Keywords | 応力 / 断層 / 逆解析 / 個別要素法 |
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| Research Abstract |
Stress tensor inversion methods are widely used to estimate the earth's crustal stress state from fault-slip orientations. The methods are based on an assumption that the slip directions of faults are consistent with the regional stress state. This study examined the assumption through numerical experiments. As a result, a significant dispersion of slip directions was found, which is also supported by natural fault-slip data. The inversion methods should be designed so as to take the dispersion into account.
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