Study of pore fluid circulation in the uppermost part of the subducting plate and its influence on seismogenic zone of large thrust earthquakes
| Project/Area Number |
15H03715
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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 |
YAMANO Makoto 東京大学, 地震研究所, 教授 (60191368)
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| Co-Investigator(Kenkyū-buntansha) |
後藤 忠徳 京都大学, 工学研究科, 准教授 (90303685)
笠谷 貴史 国立研究開発法人海洋研究開発機構, 地震津波海域観測研究開発センター, 主任技術研究員 (90373456)
川田 佳史 東北大学, 災害科学国際研究所, 助教 (50402558)
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| Co-Investigator(Renkei-kenkyūsha) |
UYESHIMA Makoto 東京大学, 地震研究所, 教授 (70242154)
TAKEI Yasuko 東京大学, 地震研究所, 教授 (30323653)
ICHIHARA Hiroshi 名古屋大学, 大学院環境学研究科, 助教 (90553074)
KODAIRA Shuichi 海洋研究開発機構, 地震津波海域観測研究開発センター, 上席研究員 (80250421)
GOTO Shusaku 産業技術総合研究所, 地圏資源環境研究部門, 主任研究員 (10378557)
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥17,420,000 (Direct Cost: ¥13,400,000、Indirect Cost: ¥4,020,000)
Fiscal Year 2017: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2016: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2015: ¥9,230,000 (Direct Cost: ¥7,100,000、Indirect Cost: ¥2,130,000)
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| Keywords | 日本海溝 / 太平洋プレート / 海洋地殻 / 流体循環 / 地殻熱流量 / 電磁気探査 / 沈み込み帯 / 温度構造 / 南海トラフ / 熱流量 / 電気伝導度 / 浸透率 / 火山 / テクトニクス / 間隙流体 / 地震 / 断層 / 比抵抗 / アウターライズ |
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| Outline of Final Research Achievements |
We revealed that heat flow significantly varies at a scale of 3 to 5 km on the incoming Pacific plate seaward of the Japan Trench. The short-wavelength heat flow variation can be attributed to heterogeneity in development of fractures and fluid circulation in oceanic crust due to bending of the plate near the trench. We also estimated the electrical resistivity structure seaward of the Japan Trench using electromagnetic survey data and could obtain information on water distribution in the upper part of the Pacific plate and its variation toward the trench.
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Report
(4 results)
Research Products
(20 results)
