Osmium concentrations and ^<187>Os/^<188>Os ratios of GSJ reference samples, JB-1a, JA-2 and JP-1

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Abstract

Osmium and Reabundance and <sup>187</sup>Os/<sup>188</sup>Os ratios of reference rocks, JB-1a, JA-2 and JP-1, were determined through isotope dilution—negative thermal ionization mass spectrometry (ID-NTI-MS). Duplicate analyses of each sample show heterogeneous distribution of Re and Os in the reference rocks. The ranges of Re and Os concentrations are 150–200 and 9–12 ppt for JB-1a, 59–67 and 10–12 ppt for JA-2 and 28–32 and 2400–2700 ppt for JP-1, respectively. Extremely high <sup>187</sup>Os/<sup>188</sup>Os ratios of 0.20–0.28, much higher than that of the chondritic mantle (0.12–0.13), of JB-1a and JA-2 indicates involvement of components with highly radiogenic <sup>187</sup>Os/<sup>188</sup>Os ratios such as the subducting slab-derived materials. The reference rocks JP-1, Horoman peridotite, yields sub-chondritic Os isotopic composition of 0.12.

Journal

  • GEOCHEMICAL JOURNAL

    GEOCHEMICAL JOURNAL 35(3), 207-210, 2001-06-01

    GEOCHEMICAL SOCIETY OF JAPAN

References:  17

Cited by:  5

Codes

  • NII Article ID (NAID)
    10010161518
  • NII NACSIS-CAT ID (NCID)
    AA00654975
  • Text Lang
    ENG
  • Article Type
    Journal Article
  • ISSN
    00167002
  • NDL Article ID
    5812901
  • NDL Source Classification
    ZM41(科学技術--地球科学)
  • NDL Call No.
    Z53-R488
  • Data Source
    CJP  CJPref  NDL  J-STAGE 
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