| Project/Area Number |
17360431
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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 |
Earth system and resources enginnering
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| Research Institution | The University of Tokyo |
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Principal Investigator |
TAMAKI Kensaku The University of Tokyo, School of Engineering, Professor (50188421)
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| Co-Investigator(Kenkyū-buntansha) |
KATO Yasuhiro The University of Tokyo, School of Engineering, Associate Professor (40221882)
URA Tamaki The University of Tokyo, Institute of Industrial Science, Professor (60111564)
OKINO Kyoko The University of Tokyo, Ocean Research Institute, Associate Professor (30313191)
OKAMURA Kei Kochi University, Center for Advanced Marine Core Research, Associate Professor (70324697)
IIZASA Kokichi AIST, Goelogical Survey of Japan, Seafloor Geoscience, Group reader (80356401)
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| Project Period (FY) |
2005 – 2007
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| Project Status |
Completed (Fiscal Year 2007)
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| Budget Amount *help |
¥13,160,000 (Direct Cost: ¥12,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2007: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2006: ¥5,200,000 (Direct Cost: ¥5,200,000)
Fiscal Year 2005: ¥3,800,000 (Direct Cost: ¥3,800,000)
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| Keywords | Marine mineral resource / Marine exploration / Geology / Ocean engineering / Hydrothermal deposits |
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| Research Abstract |
The objectives of the current research are to understand the formation mechanism of submarine hydrothermal ore deposits and to apply the understanding to the exploitation of the submarine hydrothermal ore deposits. We conducted five research cruises by the current research program ; one cruise at the mid-oceanic ridge in the Indian Ocean (the Central Indian Ridge) and four cruises at the Myojin Shoal area of Izu-Ogasawara Arc. An AUV (Autonomous Underwater Vehicle), which was developed by Prof. T. Ura, one of the members of the current research program, by using the budgets of other research program, was used during three cruises among the five cruises. We could discover two active hydrothermal sites at the Central Indian Ridge and one acitvie hydrothermal site at the Myojin Shoal area. The AUV installs in-situ Mn anomaly analyzer, side-scan sonar, phase-bathymetric mapping system, and three-component magnetometer. The current research proved that the AUV is one of the most effective tool to explore the active hydrothermal site. At the Myojin Shoal area, by collecting swath bathymetric mapping data during three cruises, a detailed bathymetric map was successfully completed. The analyses of the bathymetric data revealed the relationship of volcanoes, faulting and arc rifting. The insights of these detailed structures will provide crucial information on the target zones of near-future research of hydrothermal sites in the area
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