Abstract
Measurements of the 34S/32S ratios in sulphides from the slightly metamorphosed Lady Loretta deposit show the sphalerite and galena to be in isotopic equilibrium. Pyrite in immediate association with these sulphides is not isotopically related. A similar distribution of sulphur isotopes had previously been noted in the even less altered McArthur deposit, for which a dual sulphur source was postulated. This fresh isotopic evidence from Lady Loretta now suggests that such a genesis for stratiform sulphides from the Proterozoic is not uncommon.
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Carr, G.R., Smith, J.W. A comparative isotopic study of the Lady Loretta zinc-lead-silver deposit. Mineral. Deposita 12, 105–110 (1977). https://doi.org/10.1007/BF00204509
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DOI: https://doi.org/10.1007/BF00204509
