Hydrogen and oxygen isotope ratios of thermal waters of Okayama Prefecture, Japan

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Abstract

Hydrogen and oxygen isotope rations of thermal waters from 46 spas in Okayama Prefecture range from -62.6 to -29.2% in δD and from -10.0 to -4.4% in δ18O, respectively. The isotope rations indicate that all but one of the thermal water in Okayama prefecture are meteoric in origin. The Ofuku thermal water is the only exception, which is probably a mixture of seawater and meteoric water with the ratio of about 1. Sulfur isotope rations of dissolvel sulfate in the thermal waters range from -6.2 ti 59.3% in δ34S. The high δ34S values observed in some thermal waters may be due to bacterial reduction of sulfate.

Journal

  • Okayama University Earth Science Report

    Okayama University Earth Science Report 6(1), 39-44, 1999-09-20

    岡山大学理学部地球科学教室

Codes

  • NII Article ID (NAID)
    120002310408
  • NII NACSIS-CAT ID (NCID)
    AN10506284
  • Text Lang
    ENG
  • Article Type
    departmental bulletin paper
  • ISSN
    1340-7414
  • Data Source
    IR 
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