Oxygen isotope geothermometry applicable to sulphate minerals from the Kuroko deposits.

M. Kusakabe, H. Chiba

Research output: Chapter in Book/Report/Conference proceedingChapter

4 Citations (Scopus)

Abstract

Applicability of oxygen isotope geothermometers to sulphate minerals from the Kuroko deposits has been discussed by utilizing oxygen isotope fractionation factors determined for the anhydrite-water and baryte-water systems, together with the existing isotopic data and models. The depositional T of the anhydrite- gypsum orebody at the Shakanai mine is estimated to be approx 200oC, assuming direct precipitation of anhydrite from sea-water. At these T approx 50% of calcium sulphate originally dissolved in the Miocene sea-water was precipitated to form the orebody. The total volume of sea-water required to produce a known amount of the anhydrite- gypsum orebody was calculated. Baryte in the black ore from the Shakanai mine may have been precipitated at T considerably lower than 250oC which is widely accepted as the depositional T of the black ores based on the sulphur isotopic data. However, this discrepancy remains to be studied in the future, because the number of oxygen isotopic data from the baryte and ore solutions is very limited.- H.S.

Original languageEnglish
Title of host publicationMining Geology
Pages257-264
Number of pages8
Volume29
Edition4
Publication statusPublished - 1979
Externally publishedYes

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ASJC Scopus subject areas

  • Earth and Planetary Sciences(all)
  • Environmental Science(all)

Cite this

Kusakabe, M., & Chiba, H. (1979). Oxygen isotope geothermometry applicable to sulphate minerals from the Kuroko deposits. In Mining Geology (4 ed., Vol. 29, pp. 257-264)