Te-Xe dating for mineralization ages -As an example of some hydrothermal gold deposits-

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  • Te-Xe法による鉱化年代測定－熱水性金鉱床を例として－
  • Te-Xeホウ ニ ヨル コウカ ネンダイ ソクテイ : ネッスイセイ キンコウショウ オ レイ ト シテ

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Based on the newly determined double-beta-decay half life of 130Te ((7.0 ± 0.9stat ± 1.1syst) ×1020 yr: Arnold et al., 2011), we have measured the direct mineralization ages on tellurium-bearing minerals from some hydrothermal gold deposits by the 130Te-130Xe* method. The results are as follows: Calaverite (21.9±2.3 Ma) from the epithermal Au-Te vein, Cripple Creek mining district, USA; Hessite-petzite (34.9±5.4 Ma) from the epithermal Au-Te vein, Cash mine, Boulder County, Colorado, USA; Altaite (1,040±80 Ma) from the Au-Te quartz-carbonate vein of the Mattagami Lake mine, Matagami, Quebec, Canada; Tellurobismuthite-tetradymite (9.4±1.2 Ma) from Bi-Te quartz vein, Tsushima Island, Nagasaki Prefecture, Japan; Tellurobismuthite (81.4±2.6 Ma) from hydrothermal Au-Te vein, Oya mine, Miyagi Prefecture, Japan;　Tellurobismuthite (85±18 Ma ) from the Au-Te quartz vein, Suwa mine, Ibaraki Prefecture, Japan. These ages are obviously younger than previously reported mineralization ages by K-Ar, Ar-Ar or Pb-Pb methods.

Journal

  • Shigen-Chishitsu

    Shigen-Chishitsu 62 (3), 211-224, 2012

    The Society of Resource Geology

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