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• W4232181026 abstract "Research Article| December 01, 2001 Platinum-group elements in the Pyroxenite Marker, Bushveld Complex: implications for the formation of the Main Zone W.D. Maier; W.D. Maier Centre for Research on Magmatic Ore Deposits, Department of Geology, University of Pretoria, Pretoria 0002, South Africa, e-mail: wdmaier@scientia.up.ac.za Search for other works by this author on: GSW Google Scholar Sarah-Jane Barnes; Sarah-Jane Barnes Sciences de la Terre, Université du Québec à Chicoutimi, G7H2B1, Canada, sjbarnes@uqac.uquebec.ca Search for other works by this author on: GSW Google Scholar M. J. van der Merwe M. J. van der Merwe PO Box 39636, Pretoria 0043, South Africa Search for other works by this author on: GSW Google Scholar Author and Article Information W.D. Maier Centre for Research on Magmatic Ore Deposits, Department of Geology, University of Pretoria, Pretoria 0002, South Africa, e-mail: wdmaier@scientia.up.ac.za Sarah-Jane Barnes Sciences de la Terre, Université du Québec à Chicoutimi, G7H2B1, Canada, sjbarnes@uqac.uquebec.ca M. J. van der Merwe PO Box 39636, Pretoria 0043, South Africa Publisher: Geological Society of South Africa First Online: 07 Mar 2017 Online ISSN: 1996-8590 Print ISSN: 1012-0750 © 2001 Geological Society of South Africa South African Journal of Geology (2001) 104 (4): 301–308. https://doi.org/10.2113/gssajg.104.4.301 Article history First Online: 07 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation W.D. Maier, Sarah-Jane Barnes, M. J. van der Merwe; Platinum-group elements in the Pyroxenite Marker, Bushveld Complex: implications for the formation of the Main Zone. South African Journal of Geology 2001;; 104 (4): 301–308. doi: https://doi.org/10.2113/gssajg.104.4.301 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietySouth African Journal of Geology Search Advanced Search Abstract Concentrations of platinum-group elements and sulphides in the Pyroxenite Marker of the upper Main Zone are variable, but generally low (up to 100 ppb PGE and 0.2 weight % S). The metal patterns may mostly be explained by sulphide segregation from PGE depleted residual Upper Critical Zone magma, but they are inconsistent with sulphide segregation from a replenishing influx of undepleted Critical Zone magma. Instead, we favour a model whereby a relatively cool and dense Main Zone crystal mush intruded the Bushveld chamber during the later stages of the deposition of the Upper Critical Zone and displaced warmer and lighter residual magma depleted in chalcophile metals (Sharpe, 1985). Based on the metal contents and textural evidence such as the occurrence of ophitic textures, we hypothesize that the Pyroxenite Marker formed in response to localized supercooling and the suppression of plagioclase crystallization. The model implies that the layer represents a poor target for PGE mineralization in the upper portions of the Bushveld Complex. You do not have access to this content, please speak to your institutional administrator if you feel you should have access." @default.
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• W4232181026 title "Platinum-group elements in the Pyroxenite Marker, Bushveld Complex: implications for the formation of the Main Zone" @default.
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