%0 Journal Article %T The role of paragneiss assimilation in the origin of the Voisey's Bay Ni-Cu sulfide deposit, Labrador: Multiple S and Fe isotope evidence %+ Department of Geological Sciences [Winnipeg] %+ Centre de recherche sur la dynamique du système Terre (GEOTOP) %+ Department of Earth and Planetary Sciences [Montréal] (EPS) %+ Domaines Océaniques (LDO) %+ Géosciences Marines (GM) %A Hiebert, R.S. %A Bekker, A. %A Wing, B.A. %A Rouxel, Olivier, J. %< avec comité de lecture %@ 0361-0128 %J Economic Geology %I Society of Economic Geologists %V 108 %N 6 %P 1459-1469 %8 2013-09-06 %D 2013 %R 10.2113/econgeo.108.6.1459 %Z Sciences of the Universe [physics]/Earth Sciences/Geochemistry %Z Environmental Sciences/Global ChangesJournal articles %X Isotopic and geochemical studies conducted on the Voisey's Bay deposit, Labrador, Canada, suggest crustal contamination of the primary magma as a trigger for sulfur saturation and formation of the deposit. The use of multiple S isotopes has allowed for the identification of a bacterial sulfate reduction biosignature in the Tasiuyak gneiss in the footwall to the Voisey's Bay deposit. This putative biosignature is preserved in the deposit even at high silicate magma/sulfide melt ratios (R-factor) and links the S present in the Voisey's Bay deposit to the Tasiuyak gneiss. Iron isotopes in the Voisey's Bay deposit have been reset to magmatic values at R-factors > ≈100, but S isotope data can be used to model higher R-factors. A contamination model results in calculated R-factors of 433 ± 177. The multiple S isotope data are a new proxy to directly link S from the deposit to crustal S sources even in deposits with high R-factors where the equilibration with large amounts of silicate magma can make interpreting a link between the deposit and the sulfur source difficult %G English %L insu-00861844 %U https://insu.hal.science/insu-00861844 %~ SDE %~ INSU %~ UNIV-BREST %~ CNRS %~ IFREMER %~ GIP-BE %~ LGO %~ CMM %~ GEO-OCEAN