Sulphur Isotope Abundance Variations in Sulphides of the Dharwar Craton-Part I: Kalyadi

Authors

  • A. G. Menon
     Indian Institute of Science, Bangalore 560 012
  • V. S. Venkatasubramanian
     Indian Institute of Science, Bangalore 560 012
  • G. V. Ananta Iyer
     Indian Institute of Science, Bangalore 560 012

Abstract

Sulphur isotope abundance variations in chalcopyrite, pyrite and pyrrhotite samples from the sulphide deposits of Kalyadi have been measured with a double-collector mass spectrometer provided with digital ratio recording. The results fall into two groups - one with a near-zero per-mil value and another with a small positive value ∼5"°. Data on coexisting sulphide minerals enable temperatures of deposition to be calculated, these being low ∼250° C. The Ohmoto-procedure is adopted, and the range of δ34S values of the minerals explained by assuming an initial total sulphur δ34STS value and a range of pH and fO2 values that are plotted on an fS2 - fO2 diagram consistent with the stability fields of the minerals.

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Issue

Volume 22, Issue 8, August 1981

Section

Research Papers

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Published

1981-08-01

How to Cite

Menon, A. G., Venkatasubramanian, V. S., & Ananta Iyer, G. V. (1981). Sulphur Isotope Abundance Variations in Sulphides of the Dharwar Craton-Part I: Kalyadi. Journal of Geological Society of India, 22(8), 391–395. Retrieved from http://www.geosocindia.com/index.php/jgsi/article/view/64927

References

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