2013 Fiscal Year Final Research Report
Geological and geophysical background of subseafloor hydrothermal systems "TAIGA"
| Project Area | Project TAIGA: Trans-crustal Advection and In-situ biogeochemical processes of Global sub-seafloor Aquifer |
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| Project/Area Number |
20109002
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| Research Category |
Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
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| Allocation Type | Single-year Grants |
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| Review Section |
Science and Engineering
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| Research Institution | The University of Tokyo |
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Principal Investigator |
OKINO KYOKO 東京大学, 大気海洋研究所, 准教授 (30313191)
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| Co-Investigator(Kenkyū-buntansha) |
SEAMA Nobukazu 神戸大学, 理学系研究科, 教授 (30270862)
SHINOHARA Masanao 東京大学, 地震研究所, 教授 (90242172)
SATO Hiroshi 専修大学, 経営学部, 准教授 (50365847)
UMINO Susumu 金沢大学, 自然システム学系, 教授 (30192511)
NOGI Yoshifumi 国立極地研究所, 教育研究系, 教授 (90280536)
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| Co-Investigator(Renkei-kenkyūsha) |
ASADA Miho (独)海洋研究開発機構, 技術研究副主任 (90447376)
ABE Natsue (独)海洋研究開発機構, 研究員 (80302933)
SATO Toshinori 千葉大学, 理学部, 教授 (70222015)
MORISHITA Tomoaki 金沢大学, 理工研究域自然システム学系, 教授 (80334746)
NAKAMURA Kentaro 東京大学, 工学系研究科, 准教授 (40512083)
FUJIWARA Toshiya (独)海洋研究開発機構, 技術研究主任 (30359129)
MOCHIZUKI Nobutatsu 熊本大学, 大学院先導機構, 特任助教 (60422549)
YAMAMOTO Junji 北海道大学, 総合博物館, 准教授 (60378536)
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| Research Collaborator |
TSUJI Takeshi 九州大学, カーボンニュートラル・エネルギー国際研究所, 准教授 (60455491)
YOSHIKAWA Shuro (独)海洋研究開発機構, ポストドクトラル研究員 (00555196)
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| Project Period (FY) |
2008-04-01 – 2014-03-31
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| Keywords | 海底熱水系 / 地殻構造 / 上部マントル構造 / 岩石学 / 中央海嶺 / 背弧拡大系 |
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| Research Abstract |
The integrated geological and geophysical field surveys were conducted on the hypothesis that the diversity of subsealoor hydrothermal circulation (TAIGA: Great River) is controlled by tectonic and geological setting beneath and around the hydrothermal fields. The series of AUV and submersible dives and geophysical explorations showed that the sulfur-rich hydrothermal sites in the southern Mariana backarc spreading center are controlled mainly by the waxing and waning of magmatic activity. In contrast, the results of geological, geophysical surveys and rock geochemistry revealed that the hydrogen-rich Kairei hydrothermal field at the southernmost Central Indian Ridge is constrained by both axial basaltic magmatism and detachment faulting that exhume ultramafic rocks on a shallow subsurface.
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