Sulfur-isotope and trace element analyses from the sulitjelma ore bodies,Northern Norway |
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| Authors: | W Gehrisch A Maucher H Nielsen |
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| Institution: | 1. Institut für allgemeine und angewandte Geologie der Universit?t München, Germany
2. Laboratorium für stabile Isotope im Geochemischen Institut der Universit?t G?ttingen, Germany
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| Abstract: | δ 34S-values have been determined in 248 sulfide samples from different profiles through the ore bodies of the Sulitjelma pyrite-copper deposits. The values range for pyrite from ?4,1‰ to +9,2‰, but for an individual orebody the spread is generally much lower. Some profiles exhibit a systematic δ 34S decrease from the footwall to the hanging wall of the ore bodies, whereas laterally the S isotope composition in a distinct layer is rather uniform. Another trend from heavier to lighter sulfur exists from the center towards the margin of large porphyroblastic pyrite crystalls. Among the trace elements only the Co concentration in pyrite appears to be correlated with the δ-values. The sulfur-isotopic fractionation between coexisting sulfides is in agreement with the experience from other deposits, namely δ34Spyrite>δ34Spyrrhotite≈δ34Ssphalerite>δ34Schalcopyite |
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