FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W1974785340> ?p ?o ?g. }

• W1974785340 endingPage "88" @default.
• W1974785340 startingPage "69" @default.
• W1974785340 abstract "Re and Os concentrations and Os isotopic compositions have been obtained for massive, matrix, and disseminated sulphide ores from three environments within the Voisey's Bay intrusion (the `Ovoid', Eastern Deeps, and Discovery Hill Zone) in order to assess the role of crustal contamination in the genesis of this large Cu–Ni–Co deposit. These samples have high Re concentrations (148 to 288 ppb, in 100% sulphide) for their common Os concentrations (4.8 to 24 ppb, in 100% sulphide), yielding high Re/Os ratios (12 to 33). These data confirm that the magma parental to the Voisey's Bay ore system was broadly basaltic in major element chemistry rather than picritic, consistent with the low Ni/Cu ratio of the ores (∼1.5). Re–Os isotopic data exhibit a limited spread in 187Re/188Os (57 to 157) and define an imprecise 1323±135 Ma `model 3' isochron, likely the result of small R-factor variations within the ore system. The Re–Os isochron age is within error of 1334 Ma U–Pb ages obtained for baddeleyite from the ore-bearing troctolites, demonstrating that whole rock Re–Os isotopic systematics have remained closed since crystallisation. The initial Os isotopic composition of the isochron (γOs=1040±200) implies significant magma interactions with radiogenic Os that most likely resides in the Nain-Churchill Province crust. These data are, therefore, consistent with the parental magma achieving sulphide saturation as a result of contamination by radiogenic crustal components, with further addition of base and precious metals as a function of R-factor. Analyses of sulphide separates from the Proterozoic Tasiuyak (Churchill) and Archaean Nain gneisses confirm that both units contained significant Os (8.6 ppb and 0.38 ppb, respectively) that was very radiogenic at 1334 Ma (γOs=1908 and 5202, respectively), yielding crustal residence TCHUR model ages of 2200 to 2400 Ma. However, these model ages may have been affected by Re and/or Os mobility during the 1.85 Ga Torngat and 1.1 Ga Grenville orogeny. Re–Os isotopic modelling suggests that a reasonable fit to the ore data may be obtained via bulk crustal contamination of magmas parental to the Nain Plutonic Suite (NPS) with either Tasiuyak (2% contamination) or Nain (16% contamination) gneiss, followed by an R-factor process (200 to 1000) which improved the tenor of the sulphide liquid during transport in active magma conduits or after deposition in an active/replenished Voisey's Bay intrusion magma chamber. However, the dominance of plagioclase-rich (high Al2O3) magmas in the mafic members of the NPS (troctolites and anorthosites) may indicate that other (deeper) forms of lithospheric interaction, potentially involving mafic lower crust, may be crucial to understanding this style of magmatic sulphide ore system." @default.
• W1974785340 created "2016-06-24" @default.
• W1974785340 creator A5020896259 @default.
• W1974785340 creator A5060933989 @default.
• W1974785340 creator A5067739533 @default.
• W1974785340 creator A5070341528 @default.
• W1974785340 creator A5082361541 @default.
• W1974785340 date "1999-06-01" @default.
• W1974785340 modified "2023-09-26" @default.
• W1974785340 title "Re–Os isotopic systematics of the Voisey's Bay Ni–Cu–Co magmatic ore system, Labrador, Canada" @default.
• W1974785340 cites W1533146093 @default.
• W1974785340 cites W1968104676 @default.
• W1974785340 cites W1968740413 @default.
• W1974785340 cites W1976265423 @default.
• W1974785340 cites W1977366308 @default.
• W1974785340 cites W1986864027 @default.
• W1974785340 cites W1988806251 @default.
• W1974785340 cites W1988904216 @default.
• W1974785340 cites W1990306083 @default.
• W1974785340 cites W1995798238 @default.
• W1974785340 cites W1996988503 @default.
• W1974785340 cites W2005970376 @default.
• W1974785340 cites W2009758922 @default.
• W1974785340 cites W2011250343 @default.
• W1974785340 cites W2014356193 @default.
• W1974785340 cites W2019512994 @default.
• W1974785340 cites W2021130482 @default.
• W1974785340 cites W2021781213 @default.
• W1974785340 cites W2022050148 @default.
• W1974785340 cites W2027602831 @default.
• W1974785340 cites W2028476972 @default.
• W1974785340 cites W2030263140 @default.
• W1974785340 cites W2031244696 @default.
• W1974785340 cites W2031929480 @default.
• W1974785340 cites W2032192614 @default.
• W1974785340 cites W2033091726 @default.
• W1974785340 cites W2034706864 @default.
• W1974785340 cites W2042786792 @default.
• W1974785340 cites W2045022926 @default.
• W1974785340 cites W2052024667 @default.
• W1974785340 cites W2054486238 @default.
• W1974785340 cites W2056075756 @default.
• W1974785340 cites W2056979881 @default.
• W1974785340 cites W2063111258 @default.
• W1974785340 cites W2074016386 @default.
• W1974785340 cites W2075408083 @default.
• W1974785340 cites W2075870555 @default.
• W1974785340 cites W2083834813 @default.
• W1974785340 cites W2086212718 @default.
• W1974785340 cites W2090717522 @default.
• W1974785340 cites W2104896381 @default.
• W1974785340 cites W2105311192 @default.
• W1974785340 cites W2106436264 @default.
• W1974785340 cites W2114110021 @default.
• W1974785340 cites W2114949821 @default.
• W1974785340 cites W2116800634 @default.
• W1974785340 cites W2168246340 @default.
• W1974785340 cites W2313328138 @default.
• W1974785340 cites W4247137165 @default.
• W1974785340 doi "https://doi.org/10.1016/s0024-4937(99)00008-0" @default.
• W1974785340 hasPublicationYear "1999" @default.
• W1974785340 type Work @default.
• W1974785340 sameAs 1974785340 @default.
• W1974785340 citedByCount "90" @default.
• W1974785340 countsByYear W19747853402012 @default.
• W1974785340 countsByYear W19747853402013 @default.
• W1974785340 countsByYear W19747853402014 @default.
• W1974785340 countsByYear W19747853402015 @default.
• W1974785340 countsByYear W19747853402016 @default.
• W1974785340 countsByYear W19747853402017 @default.
• W1974785340 countsByYear W19747853402018 @default.
• W1974785340 countsByYear W19747853402019 @default.
• W1974785340 countsByYear W19747853402020 @default.
• W1974785340 countsByYear W19747853402021 @default.
• W1974785340 countsByYear W19747853402022 @default.
• W1974785340 crossrefType "journal-article" @default.
• W1974785340 hasAuthorship W1974785340A5020896259 @default.
• W1974785340 hasAuthorship W1974785340A5060933989 @default.
• W1974785340 hasAuthorship W1974785340A5067739533 @default.
• W1974785340 hasAuthorship W1974785340A5070341528 @default.
• W1974785340 hasAuthorship W1974785340A5082361541 @default.
• W1974785340 hasConcept C111368507 @default.
• W1974785340 hasConcept C115880899 @default.
• W1974785340 hasConcept C120806208 @default.
• W1974785340 hasConcept C127313418 @default.
• W1974785340 hasConcept C161509811 @default.
• W1974785340 hasConcept C17409809 @default.
• W1974785340 hasConcept C183222429 @default.
• W1974785340 hasConcept C2776698055 @default.
• W1974785340 hasConcept C2778849375 @default.
• W1974785340 hasConcept C2780981397 @default.
• W1974785340 hasConcept C46381822 @default.
• W1974785340 hasConcept C487381 @default.
• W1974785340 hasConcept C57016615 @default.
• W1974785340 hasConcept C67236022 @default.
• W1974785340 hasConceptScore W1974785340C111368507 @default.
• W1974785340 hasConceptScore W1974785340C115880899 @default.
• W1974785340 hasConceptScore W1974785340C120806208 @default.

• next