Helium isotopes in South Pacific deep seawater

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著者

    • SANO Yuji
    • Department of Earth and Planetary Sciences, Faculty of Science, Hiroshima University
    • TAKAHATA Naoto
    • Department of Earth and Planetary Sciences, Faculty of Science, Hiroshima University

抄録

We have measured <sup>3</sup>He/<sup>4</sup>He and <sup>4</sup>He/<sup>20</sup>Ne ratios and <sup>4</sup>He concentrations in 19 South Pacific water samples with various depths from station SA-6 located in the Solomon Sea (6°38'S, 153°38'E) and SA-7 in the central Coral Sea Basin (14°16'S, 154°19'E) on the KH-92-4 cruise of the Research Vessel, Hakuho Maru of the University of Tokyo. The <sup>3</sup>He/<sup>4</sup>He and <sup>4</sup>He/<sup>20</sup>Ne ratios vary significantly from 0.988 <i>R</i><sub>atm</sub> to 1.276 <i>R</i><sub>atm</sub> and from 0.254 to 0.292, respectively. An extensive plume of water enriched in <sup>3</sup>He has been discovered at a depth of about 2000 meter. Taking <sup>3</sup>He/<sup>4</sup>He data of the Geosecs and the South Tow expeditions, 25% excess <sup>3</sup>He plume can be traced over 5000 kilometers to the west of the East Pacific Rise. Observed 25% excess <sup>3</sup>He plume at SA-6 and 7 may be independent from the ridge, which suggests that there is another source of the mantle derived helium in the area studied.

収録刊行物

  • Geochemical journal : journal of the Geochemical Society of Japan

    Geochemical journal : journal of the Geochemical Society of Japan 29(6), 377-384, 1995-12-01

    GEOCHEMICAL SOCIETY OF JAPAN

参考文献:  32件中 1-32件 を表示

被引用文献:  2件中 1-2件 を表示

各種コード

  • NII論文ID(NAID)
    10008800362
  • NII書誌ID(NCID)
    AA00654975
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    00167002
  • データ提供元
    CJP書誌  CJP引用  J-STAGE 
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