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Chemical studies on venting fluids from submarine plate boundaries (KAIKO-TOKAI Project)

Research Project

Project/Area Number 08454163
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field 地球化学
Research InstitutionThe University of Tokyo

Principal Investigator

GAMO Toshitaka  The University of Tokyo, Ocean Research Institute, Associate Professor, 海洋研究所, 助教授 (70143550)

Co-Investigator(Kenkyū-buntansha) ISHIBASHI Junichiro  Kyushu University, Faculty of Science Associat Professor, 理学部, 助教授 (20212920)
Project Period (FY) 1996 – 1998
Project Status Completed (Fiscal Year 1998)
Budget Amount *help
¥8,900,000 (Direct Cost: ¥8,900,000)
Fiscal Year 1998: ¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 1997: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 1996: ¥6,500,000 (Direct Cost: ¥6,500,000)
KeywordsPlate Boundary / Hydrothermal fluid / Cold Seepage / Dissolved Gas / Stable Isotope Ratio / Submersible Observation / Subduction Zone / Mid-Oceanic Ridge / ガスクロマトグラフ / 質量分析
Research Abstract

Plate boundaries on the deep seafloor, such as mid-oceanic ridges and plate subduction zones, can be regarded as openings or windows through which much amount of chemical components comes up from or goes down to the earth interior chiefly by seawater convection. Since the venting fluids have quite different characteristiecs from ambient seawater, it is suggested that the fluids should bear significant parts of chemical flux between the ocean and the lithosphere. This study has paid attention to dissolved gas components, such as methane, helium, carbon dioxide etc. in venting fluids, because their concentrations and stable isotope ratios give us much useful information on the sources of the gases associated with pore fluid behaviors. As for the cold seepage at subduction zones, this study forms a part of Japan-France KAIKO-TOKAI Project which had been successfully conducted in the eastern Nankai Trough subduction zone between 1993 and 1997. We took many pore fluid samples and bottom seawaters for their chemical characterization. We have also promoted chemical investigations for submarine hydrothermal vents at various locations of mid-oceanic ridges (East Pacific Rise, Mid-Atlantic Ridge, Indian Ridge), back-arc basins (Okinawa Trough, Mariana Trough, Manus Basin), and arc volcanoes (Myojin Knoll). Accumulated data including time-series data have elucidated complicated chatacteristics of spatial and temporal variations of hydrothermal activity in the world. We have published 29 original papers on this project so far. These results of this study will play important role as preliminary databases for more detailed researches in the future.

Report

(4 results)
  • 1998 Annual Research Report   Final Research Report Summary
  • 1997 Annual Research Report
  • 1996 Annual Research Report

Research Products

(32 results)

All Other

All Publications

  • [Publications] 「研究成果報告書概要(和文)」より

    • Related Report
      1998 Final Research Report Summary
  • [Publications] 「研究成果報告書概要(和文)」より

    • Related Report
      1998 Final Research Report Summary
  • [Publications] 「研究成果報告書概要(和文)」より

    • Related Report
      1998 Final Research Report Summary
  • [Publications] 「研究成果報告書概要(和文)」より

    • Related Report
      1998 Final Research Report Summary
  • [Publications] 「研究成果報告書概要(和文)」より

    • Related Report
      1998 Final Research Report Summary
  • [Publications] 「研究成果報告書概要(和文)」より

    • Related Report
      1998 Final Research Report Summary
  • [Publications] 「研究成果報告書概要(和文)」より

    • Related Report
      1998 Final Research Report Summary
  • [Publications] 「研究成果報告書概要(欧文)」より

    • Related Report
      1998 Final Research Report Summary
  • [Publications] 「研究成果報告書概要(欧文)」より

    • Related Report
      1998 Final Research Report Summary
  • [Publications] 「研究成果報告書概要(欧文)」より

    • Related Report
      1998 Final Research Report Summary
  • [Publications] 「研究成果報告書概要(欧文)」より

    • Related Report
      1998 Final Research Report Summary
  • [Publications] 「研究成果報告書概要(欧文)」より

    • Related Report
      1998 Final Research Report Summary
  • [Publications] 「研究成果報告書概要(欧文)」より

    • Related Report
      1998 Final Research Report Summary
  • [Publications] 「研究成果報告書概要(欧文)」より

    • Related Report
      1998 Final Research Report Summary
  • [Publications]

    • Related Report
      1998 Annual Research Report
  • [Publications]

    • Related Report
      1998 Annual Research Report
  • [Publications]

    • Related Report
      1998 Annual Research Report
  • [Publications]

    • Related Report
      1998 Annual Research Report
  • [Publications]

    • Related Report
      1998 Annual Research Report
  • [Publications]

    • Related Report
      1998 Annual Research Report
  • [Publications]

    • Related Report
      1997 Annual Research Report
  • [Publications]

    • Related Report
      1997 Annual Research Report
  • [Publications]

    • Related Report
      1997 Annual Research Report
  • [Publications]

    • Related Report
      1997 Annual Research Report
  • [Publications]

    • Related Report
      1997 Annual Research Report
  • [Publications]

    • Related Report
      1996 Annual Research Report
  • [Publications]

    • Related Report
      1996 Annual Research Report
  • [Publications]

    • Related Report
      1996 Annual Research Report
  • [Publications]

    • Related Report
      1996 Annual Research Report
  • [Publications]

    • Related Report
      1996 Annual Research Report
  • [Publications]

    • Related Report
      1996 Annual Research Report
  • [Publications]

    • Related Report
      1996 Annual Research Report

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Published: 1996-04-01   Modified: 2016-04-21  

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