Matches in SemOpenAlex for { <https://semopenalex.org/work/W2017042956> ?p ?o ?g. }
- W2017042956 endingPage "1110" @default.
- W2017042956 startingPage "1091" @default.
- W2017042956 abstract "The Platreef, the world’s third largest platinum group element (PGE) deposit, is a 10–400-m thick pyroxenitic unit at the base of the northern limb of the mafic Bushveld Complex, hosting PGE mineralization in association with base metal sulfides. The sulfide mineralization is thought to have been either largely magmatic in origin, with contamination by assimilation of local floor rocks considered an ore-modifying process, or a product of assimilation of country-rock S and silicic contamination which caused S saturation in the magma, with the contamination being fundamental to the ore-forming process. We have performed an extensive and detailed sulfur isotope study of the Platreef, which indicates that magmatic signatures (δ34S = 0 to +2‰) are preserved in early-formed sulfide droplets within the Platreef pyroxenites in the area from Sandsloot to Witrivier. These values are comparable to sulfide inclusions in diamonds in the nearby Klipspringer kimberlite and are considered to have a primary mantle origin. There is no indication of any significant external S in any of the primary sulfides in the Sandsloot-Witrivier area, however, later sulfides found in calc-silicate floor rocks at Sandsloot and Zwartfontein and in xenoliths of calc-silicate throughout the section indicate an input of country rock S. Anhydrite-bearing horizons in the Malmani dolomites may have exchanged S with magmatic Platreef sulfide during Platreef intrusion, imparting a heavier S isotope signature in the fluid-affected rocks than those in the early sulfides. The Archean basement, although containing minor amounts of sulfide with a negative δ34S value, is not a significant contributor to the S budget of the Platreef. Previous studies have indicated that in areas where the sedimentary floor rocks contain appreciable sulfides, rather than sulfates, such as at Turfspruit, the Platreef sulfides are extensively contaminated with country-rock S. Assimilation of pyrite-bearing shales in the Turfspruit area has locally upgraded the S content of the Platreef and given the basal Platreef sulfides a heavier isotopic signature.Sulfur saturation in the Platreef magma took place before contamination, probably in a staging chamber prior to intrusion. A major pulse of magma entrained the preformed PGE-rich sulfides and was injected to form the Platreef, where assimilation of country-rock sulfides upgraded the S content on a strictly local scale, and hydrothermal leaching introduced S from country-rock sulfates into later stage sulfides, again on a local scale. South of Zwartfontein, it is proposed that the Platreef was intruded into sediments of the Transvaal Supergroup, which formed the floor and the roof of the Platreef. North of Zwartfontein, the Platreef intruded the boundary between the Malmani Supergroup sediments and the Archean basement. This could have potentially mineralized the roof calc-silicates north of Zwartfontein in a manner similar to the floor in the Sandsloot area. The later intrusion of the Main zone magma formed a magmatic unconformity on top of the cold Platreef and entrained large rafts of mineralized calc-silicate for tens of kilometers north of the last footwall outcrop of calc-silicate." @default.
- W2017042956 created "2016-06-24" @default.
- W2017042956 creator A5026026792 @default.
- W2017042956 creator A5033028117 @default.
- W2017042956 creator A5036557426 @default.
- W2017042956 date "2007-09-01" @default.
- W2017042956 modified "2023-10-01" @default.
- W2017042956 title "Sulfur Isotope Variations within the Platreef Ni-Cu-PGE Deposit: Genetic Implications for the Origin of Sulfide Mineralization" @default.
- W2017042956 cites W1525212908 @default.
- W2017042956 cites W1624387927 @default.
- W2017042956 cites W1965193826 @default.
- W2017042956 cites W1969577004 @default.
- W2017042956 cites W1980311706 @default.
- W2017042956 cites W1987275845 @default.
- W2017042956 cites W1987474899 @default.
- W2017042956 cites W1994884217 @default.
- W2017042956 cites W1995849133 @default.
- W2017042956 cites W1996866484 @default.
- W2017042956 cites W1996988503 @default.
- W2017042956 cites W2002323462 @default.
- W2017042956 cites W2005121896 @default.
- W2017042956 cites W2009871158 @default.
- W2017042956 cites W2010094459 @default.
- W2017042956 cites W2027140297 @default.
- W2017042956 cites W2032710581 @default.
- W2017042956 cites W2039932144 @default.
- W2017042956 cites W2041130421 @default.
- W2017042956 cites W2055612663 @default.
- W2017042956 cites W2069102670 @default.
- W2017042956 cites W2074037617 @default.
- W2017042956 cites W2076195189 @default.
- W2017042956 cites W2093724940 @default.
- W2017042956 cites W2104896381 @default.
- W2017042956 cites W2120611591 @default.
- W2017042956 cites W2120942513 @default.
- W2017042956 cites W2129051699 @default.
- W2017042956 cites W2130396524 @default.
- W2017042956 cites W2131527818 @default.
- W2017042956 cites W2138471968 @default.
- W2017042956 cites W2160819888 @default.
- W2017042956 cites W2171635717 @default.
- W2017042956 cites W2172291322 @default.
- W2017042956 cites W2327141734 @default.
- W2017042956 cites W2562128687 @default.
- W2017042956 cites W2605811648 @default.
- W2017042956 doi "https://doi.org/10.2113/gsecongeo.102.6.1091" @default.
- W2017042956 hasPublicationYear "2007" @default.
- W2017042956 type Work @default.
- W2017042956 sameAs 2017042956 @default.
- W2017042956 citedByCount "66" @default.
- W2017042956 countsByYear W20170429562012 @default.
- W2017042956 countsByYear W20170429562013 @default.
- W2017042956 countsByYear W20170429562014 @default.
- W2017042956 countsByYear W20170429562015 @default.
- W2017042956 countsByYear W20170429562016 @default.
- W2017042956 countsByYear W20170429562017 @default.
- W2017042956 countsByYear W20170429562018 @default.
- W2017042956 countsByYear W20170429562019 @default.
- W2017042956 countsByYear W20170429562020 @default.
- W2017042956 countsByYear W20170429562021 @default.
- W2017042956 countsByYear W20170429562022 @default.
- W2017042956 countsByYear W20170429562023 @default.
- W2017042956 crossrefType "journal-article" @default.
- W2017042956 hasAuthorship W2017042956A5026026792 @default.
- W2017042956 hasAuthorship W2017042956A5033028117 @default.
- W2017042956 hasAuthorship W2017042956A5036557426 @default.
- W2017042956 hasConcept C107872376 @default.
- W2017042956 hasConcept C111696902 @default.
- W2017042956 hasConcept C121332964 @default.
- W2017042956 hasConcept C127313418 @default.
- W2017042956 hasConcept C159390177 @default.
- W2017042956 hasConcept C159750122 @default.
- W2017042956 hasConcept C164304813 @default.
- W2017042956 hasConcept C17409809 @default.
- W2017042956 hasConcept C185592680 @default.
- W2017042956 hasConcept C191897082 @default.
- W2017042956 hasConcept C192562407 @default.
- W2017042956 hasConcept C2780596425 @default.
- W2017042956 hasConcept C518881349 @default.
- W2017042956 hasConcept C62520636 @default.
- W2017042956 hasConceptScore W2017042956C107872376 @default.
- W2017042956 hasConceptScore W2017042956C111696902 @default.
- W2017042956 hasConceptScore W2017042956C121332964 @default.
- W2017042956 hasConceptScore W2017042956C127313418 @default.
- W2017042956 hasConceptScore W2017042956C159390177 @default.
- W2017042956 hasConceptScore W2017042956C159750122 @default.
- W2017042956 hasConceptScore W2017042956C164304813 @default.
- W2017042956 hasConceptScore W2017042956C17409809 @default.
- W2017042956 hasConceptScore W2017042956C185592680 @default.
- W2017042956 hasConceptScore W2017042956C191897082 @default.
- W2017042956 hasConceptScore W2017042956C192562407 @default.
- W2017042956 hasConceptScore W2017042956C2780596425 @default.
- W2017042956 hasConceptScore W2017042956C518881349 @default.
- W2017042956 hasConceptScore W2017042956C62520636 @default.
- W2017042956 hasIssue "6" @default.
- W2017042956 hasLocation W20170429561 @default.
- W2017042956 hasOpenAccess W2017042956 @default.
- W2017042956 hasPrimaryLocation W20170429561 @default.