Slip properties of serpentine under high fluid pressure and implication for slow earthquake
| Project/Area Number |
24340105
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Partial Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Solid earth and planetary physics
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| Research Institution | Hiroshima University |
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Principal Investigator |
KATAYAMA Ikuo 広島大学, 理学(系)研究科(研究院), 教授 (10448235)
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥18,070,000 (Direct Cost: ¥13,900,000、Indirect Cost: ¥4,170,000)
Fiscal Year 2014: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2013: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2012: ¥10,270,000 (Direct Cost: ¥7,900,000、Indirect Cost: ¥2,370,000)
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| Keywords | 蛇紋岩 / スロー地震 / 沈み込み帯 / 蛇紋石 / 間隙水圧 / プレート境界 / 摩擦特性 / 摩擦則 |
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| Outline of Final Research Achievements |
Slow earthquakes occurred at subduction zone are distinct from regular earthquake in terms of their slip behaviors (e.g., Ide et al. 2007). We consider this difference to relate to localized hydration reactions at the plate interface that influence the frictional properties. The results of laboratory friction experiments indicate that, under high fluid pressure, simulated serpentine faults tend to be unstable at elevated temperature close to dehydration, which are characterized by a significantly slow rate of stress drop during instability. These properties are consistent with the characteristics of subduction-related slow earthquakes, which exhibit a relatively long duration for energy release.
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Report
(4 results)
Research Products
(30 results)
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[Journal Article] Deformation microstructures of glaucophane and lawsonite in experimentally deformed blueschists: Implications for intermediate-depth intraplate earthquakes2015
Author(s)
Kim, D., Katayama, I., Wallis, S., Michibayashi, K., Miyake, A. & Seto, Y.
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Journal Title
Journal of Geophysical Research
Volume: 120
Issue: 2
Pages: 1229-1242
DOI
Related Report
Peer Reviewed / Open Access
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