2005 Fiscal Year Final Research Report Summary
Integrated Research on the Mid-oceanic Ridge by Internationally Co-operated Expeditions
| Project/Area Number |
14253003
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 海外学術 |
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| Research Field |
固体地球物理学
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| Research Institution | The University of Tokyo |
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Principal Investigator |
TAMAKI Kensaku The University of Tokyo, Guraduate School of Engineering, Professor, 大学院工学系研究科, 教授 (50188421)
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| Co-Investigator(Kenkyū-buntansha) |
COFFIN Millard The University of Tokyo, Ocean Research Institute, Professor, 海洋研究所, 教授 (70343100)
GAMO Tosinori The University of Tokyo, Ocean Research Institute, Professor, 海洋研究所, 教授 (70143550)
OKINO Kyoko The University of Tokyo, Ocean Research Institute, Associate professor, 海洋研究所, 助教授 (30313191)
ISHIBASHI Junichiro Kyushu University, Faculty of Science, Associate professor, 理学部, 助教授 (20212920)
SEAMA Nobukazu Kobe University, Faculty of Science, Associate professor, 理学部, 助教授 (30270862)
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| Project Period (FY) |
2002 – 2005
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| Keywords | Mid-ocean ridge / Geomagnetism / Geophysics / Underwater survey |
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| Research Abstract |
This project promoted InterRidge Japan as a part of InterRidge International Project with the financial supports for the payment of member's fee of InterRidge (20,000-25,000 US$ annually), travels of Japanese ridge scientists for participating domestic and international mid-oceanic ridge research cruises and InterRidge meetings such as an InterRidge steering committee, InterRidge Symposiums, Workshops, and Theoretical Institutes, and for inviting foreign ridge research scientists. By these supports Japan made a principal contribution to the InterRidge (current number of the member countries is 29) as one of five principal member countries with UK, US, France, and Germany. Two members of this projects are appointed as members of the InterRidge Steering Committee. During four years, 14 mid-oceanic research cruises were conducted with the partial financial supports by this project. The research fields cover marine geology, marine geophysics, water geochemistry, marine biology, and ocean technology. Japan specially contributed in the fields of hydrothermal geochemistry, marine microbiology, and ocean technology. AUV (Autonomous Underwater Vehicle) expedition with three-component magnetometer installed demonstrated the demagnetization of the crust according to the extent of hydrothermal activity at the Mariana Trough in the Western Pacific. Regional water circulation in the oceanic crusts around the mid-oceanic ridge was evidenced by IODP Juan de Fuca Ridge drilling for which this project made partial financial support. The cooperated expedition research at the Southwestern Indian Ridge found wide exposures of mantle rocks on the sea floor which suggest a fundamental mechanism of ultra-slow spreading system with very low magmatism. In 2006 diving research cruises were conducted at the hydrothermal area at the Central Indian Ridge and we succeeded to obtain valuable samples of microbiology and hydrothermal mineralization which analyses are currently ongoing.
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[Journal Article] TOBI sidescan sonar imagery of the very slow-spreading Southwest Indian Ridge : evidence for along-axis magma distribution,2002
Author(s)
Sauter, D., L.Parson, V.Mendel, C.Rommevaux-Jestin, O.Gomez, A.Briais, C.Mevel, K.Tamaki, FUJI scientific team
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Journal Title
Earth Planet.Sci.Lett. 199
Pages: 81-95
Description
「研究成果報告書概要(欧文)」より
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