| Project/Area Number |
08640575
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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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 | Faculty of Science, Kochi University |
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Principal Investigator |
OKAMURA Makoto Faculty of Science, Kochi University, Professor, 理学部, 教授 (10112385)
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| Co-Investigator(Kenkyū-buntansha) |
MATSUOKA H. Assistant Professor, 理学部, 助手 (60222296)
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| Project Period (FY) |
1996 – 1997
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| Project Status |
Completed (Fiscal Year 1997)
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| Budget Amount *help |
¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1997: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1996: ¥1,500,000 (Direct Cost: ¥1,500,000)
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| Keywords | submarine fault / active fault / Holocene / neotectonics / mid-kyushu / 正断層群 |
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| Research Abstract |
1. Submarine active faults distributed in and around the middle part of Kyushu were mapped using by high-resolution seismic survey and sediment sampled by piston coring.
2. Submarine active fault found in the Omura Bay has cummulative displacement in the Holonene sdiment. Two cores were sampled from the both-side of the fault. Three times seismic events were recognized from the cores under precise correlation of the cores. The recurrence interval of seismic event estimated 3000 years, and each vertical displacement shows 30cm.
3. The Hinagu fault were newly found in the Yatsushiro Sea, which show typical strike-slip drug fault. Fault activities analysed from the cores were two-times at least in the Holocene. Total vertical displacement of the Hinagu submarine fault shows 10 meters among the Holocene sediments.
4. In the Ariake Sea, we found three small Holocene gravens extend from east to west.
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