The sulphur isotope systematics of the Taolin lead-zinc ore deposit,China |
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| Authors: | T Ding CE Rees |
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| Institution: | Departments of Geology and Chemistry, McMaster University, Hamilton, Ontario, L8S 4K1, Canada;Department of Geology, McMaster University, Hamilton, Ontario, L8S 4K1, Canada |
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| Abstract: | Sulphur isotope data from coexisting sulphides and sulphates from the Taolin Pb-Zn ore deposit have been used to estimate the temperatures of sulphur mineral precipitation. The data indicate that sulphide was the dominant sulphur species in solution at high temperatures and that sulphate was dominant at low temperatures. Also the data show that the δ34S value of total sulphur in solution was close to zero at high temperatures (~325°C) but had high positive values (+15%.) at low temperatures (~250°C). We interpret this phenomenon in terms of the effects of mineral precipitation on the isotopic composition of the solution. The increase in the δ34S value of total sulphur with decreasing temperature was brought about by the removal from the system, by precipitation, of isotopically light sulphides. |
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