Polymetallic sulfides on the off-axis volcanoes around the East Pacific Rise; 11°30' North Latitude

DOI

Bibliographic Information

Other Title
  • 東太平洋海膨の海山における海底熱水鉱床について

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Description

We discovered two mineralized zones accompanied by polymetallic sulfides on the off-axis volcanoes which are located east and west of the East Pacific Rise (EPR) Crest at the latitude 11°30' North.<BR>One zone developes along the northern slope of the seamount (87D-D1 Seamount) about 30km east of the EPR Crestwith an area of about 200 m wide and 250 m long. Another zone occurs along the northern slope of the seamount (87D-C Seamount) at about 7 km west from the axial zone with more than 100 m in E-W direction. The mineralized samples consist of sulfides, brown precipitates mainly of iron oxides and siliceous precipitates. The sulfide ore is composed of pyrite and marcasite in association with goethite, chalcopyrite and hematite and with minor amounts of sphalerite and covelline.<BR>No active smoker was observed in the vicinity of the mineralized zone. Data of biological community (vent animal) and seawater temperature further support an extinction of hydrothermal activity around the mineralized zone. Adjacent seamounts are prospective for another hydrothermal mineralization.

Journal

  • Shigen-Chishitsu

    Shigen-Chishitsu 44 (245), 187-199, 1994

    The Society of Resource Geology

Details 詳細情報について

  • CRID
    1390282679447544960
  • NII Article ID
    130003442298
  • DOI
    10.11456/shigenchishitsu1992.44.187
  • ISSN
    21854033
    09182454
  • Data Source
    • JaLC
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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