Elemental dissolution of basalts with ultra-pure water at 340°C and 40 Mpa in a newly developed flow-type hydrothermal apparatus

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  • KATO SHINGO
    Department of Molecular Biology, Tokyo University of Pharmacy and Life Science
  • SHIBUYA TAKAZO
    Precambrian Ecosystem Laboratory (PEL), Japan Agency for Marine-Earth Science and Technology (JAMSTEC) Submarine Resources Research Project (SRRP), Japan Agency for Marine-Earth Science and Technology (JAMSTEC)
  • NAKAMURA KENTARO
    Precambrian Ecosystem Laboratory (PEL), Japan Agency for Marine-Earth Science and Technology (JAMSTEC) Submarine Resources Research Project (SRRP), Japan Agency for Marine-Earth Science and Technology (JAMSTEC)
  • SUZUKI KATSUHIKO
    Precambrian Ecosystem Laboratory (PEL), Japan Agency for Marine-Earth Science and Technology (JAMSTEC) Submarine Resources Research Project (SRRP), Japan Agency for Marine-Earth Science and Technology (JAMSTEC) Institute for Research on Earth Evolution (IFREE), Japan Agency for Marine-Earth Science and Technology (JAMSTEC)
  • REJISHKUMAR V. J.
    Department of Molecular Biology, Tokyo University of Pharmacy and Life Science
  • YAMAGISHI AKIHIKO
    Department of Molecular Biology, Tokyo University of Pharmacy and Life Science

書誌事項

公開日
2013-02-20
資源種別
journal article
DOI
  • 10.2343/geochemj.2.0240
公開者
一般社団法人日本地球化学会

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説明

To simulate the discharge zone of hydrothermal systems in the laboratory, we developed a flow-type hydrothermal apparatus that can reproduce water-rock reactions at elevated temperatures and pressures under flow-through conditions and also the mixing of hydrothermal fluids with seawater. Using this apparatus, basaltic rocks were reacted with ultra-pure water at 340°C and 40 MPa for 1271 h under flow-through conditions. An increase in Al, Fe, K, Na, P and Si in the reacted water was observed during the experiment, reproducing the process of dissolution from the basaltic rocks. An increase in pH to 9 during the experiment can be attributed to the dissolution of silicate minerals in the basaltic rocks. That the pH in the experiment is higher than the pH observed in natural hydrothermal fluids at mid-ocean ridges is a result of higher Si concentrations observed in the experiment than those of natural hydrothermal fluids.

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