Abstract
Abstract The current application of S32/S34 measurements in ore genesis studies is examined and it is suggested that, in emphasising fractionation processes, most investigators have made insufficient allowance for the possible influence of source variation, hybrdisation, migrational contamination and post–depositional homogenisation in the final development of S32/S34 ratios in different sulphide ores. In the present contribution the more important geological processes of sulphide ore formation are considered, and from this a theoretical pattern of S32/S34 ratios in different types of orebodies is deduced. Because of the present paucity of data, this “model” is put forward strictly as an approximation, and is intended only as a basis for the more systematic application of sulphur isotope studies in problems of ore genesis. Several avenues for investigation are suggested.
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