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Erschienen in:
2005 | OriginalPaper | Buchkapitel
Unraveling mineral isotope signatures from whole-rock oxygen and hydrogen isotope data: A case study
verfasst von : T. Monecke, H. Paulick, R. Kleeberg
Erschienen in: Mineral Deposit Research: Meeting the Global Challenge
Verlag: Springer Berlin Heidelberg
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The present contribution proposes a method that allows the calculation of the stable isotope signatures of minerals contained in fine-grained altered volcanic rocks by combining isotope measurements and quantitative XRD analysis on whole-rock samples and grain size separates. Application of this method to samples from the Waterloo VHMS deposit, Australia, revealed that hydrothermal alteration associated with the formation of pyrite-rich massive sulfides proceeded at higher temperatures than that related to the precipitation of sphalerite-rich sulfides. The calculated δ
18
O and δD values of the hydrothermal fluids are 0.5 to 5.5 ‰ and-O to-25 ‰, respectively.