Platinum-Group Elements and Gold in Base Metal Sulfides, Platinum-Group Minerals, and Re-Os Isotope Compositions of the Uitkomst Complex, South Africa

Research Article| March 01, 2018 Platinum-Group Elements and Gold in Base Metal Sulfides, Platinum-Group Minerals, and Re-Os Isotope Compositions of the Uitkomst Complex, South Africa Jakub Trubač; Jakub Trubač 1Institute of Geology v.v.i., The Czech Academy of Sciences, Rozvojová 269, 165 00 Prague, Czech Republic2Institute of Geochemistry, Mineralogy and Mineral Resources, Faculty of Science, Charles University, Albertov 6, 128 43 Prague 2, Czech Republic †Corresponding author: e-mail, jakub.trubac@gmail.com Search for other works by this author on: GSW Google Scholar Lukáš Ackerman; Lukáš Ackerman 1Institute of Geology v.v.i., The Czech Academy of Sciences, Rozvojová 269, 165 00 Prague, Czech Republic3Czech Geological Survey, Geologická 6, 152 00 Prague, Czech Republic Search for other works by this author on: GSW Google Scholar Christoph Gauert; Christoph Gauert 4Department of Geology, University of the Free State, Bloemfontein 9300, South Africa5Department of Applied Geology and Geohazards, Geological Survey of Saxony-Anhalt, Köthener Str. 38, 06118 Halle (Saale), Germany Search for other works by this author on: GSW Google Scholar Jana Ďurišová; Jana Ďurišová 1Institute of Geology v.v.i., The Czech Academy of Sciences, Rozvojová 269, 165 00 Prague, Czech Republic Search for other works by this author on: GSW Google Scholar Tomáš Hrstka Tomáš Hrstka 1Institute of Geology v.v.i., The Czech Academy of Sciences, Rozvojová 269, 165 00 Prague, Czech Republic6SGS Minerals Services, Lakefield, Ontario KOL 2HO, Canada Search for other works by this author on: GSW Google Scholar Author and Article Information Jakub Trubač 1Institute of Geology v.v.i., The Czech Academy of Sciences, Rozvojová 269, 165 00 Prague, Czech Republic2Institute of Geochemistry, Mineralogy and Mineral Resources, Faculty of Science, Charles University, Albertov 6, 128 43 Prague 2, Czech Republic Lukáš Ackerman 1Institute of Geology v.v.i., The Czech Academy of Sciences, Rozvojová 269, 165 00 Prague, Czech Republic3Czech Geological Survey, Geologická 6, 152 00 Prague, Czech Republic Christoph Gauert 4Department of Geology, University of the Free State, Bloemfontein 9300, South Africa5Department of Applied Geology and Geohazards, Geological Survey of Saxony-Anhalt, Köthener Str. 38, 06118 Halle (Saale), Germany Jana Ďurišová 1Institute of Geology v.v.i., The Czech Academy of Sciences, Rozvojová 269, 165 00 Prague, Czech Republic Tomáš Hrstka 1Institute of Geology v.v.i., The Czech Academy of Sciences, Rozvojová 269, 165 00 Prague, Czech Republic6SGS Minerals Services, Lakefield, Ontario KOL 2HO, Canada †Corresponding author: e-mail, jakub.trubac@gmail.com Publisher: Society of Economic Geologists Accepted: 27 Oct 2017 First Online: 09 Mar 2018 Online Issn: 1554-0774 Print Issn: 0361-0128 © 2018 Economic GeologyEconomic Geology Economic Geology (2018) 113 (2): 439–461. https://doi.org/10.5382/econgeo.2018.4557 Article history Accepted: 27 Oct 2017 First Online: 09 Mar 2018 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Jakub Trubač, Lukáš Ackerman, Christoph Gauert, Jana Ďurišová, Tomáš Hrstka; Platinum-Group Elements and Gold in Base Metal Sulfides, Platinum-Group Minerals, and Re-Os Isotope Compositions of the Uitkomst Complex, South Africa. Economic Geology 2018;; 113 (2): 439–461. doi: https://doi.org/10.5382/econgeo.2018.4557 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 SocietyEconomic Geology Search Advanced Search Abstract The Uitkomst Complex is a Ni-Cu-PGE-Cr-Co mineralized composite mafic-ultramafic intrusion situated in South Africa. The platinum-group elements (PGEs), Re and Au contents in base metal sulfides (BMS), and Re-Os isotope compositions were determined, as well as the occurrence of associated platinum-group minerals (PGMs) in the various mineralized zones of the complex. BMS within the complex have elevated PGE and Au contents, with the highest values (average of ~10 ppm total PGE) for the massive sulfide body, much lower than the values for BMS from the nearby Bushveld Complex. Pentlandite, as major PGE carrier, hosts most of the Pd, whereas pyrrhotite is characterized by elevated iridium subgroup platinum-group element (IPGE; Os, Ir, Ru) content lacking Pd. Chalcopyrite occasionally serves as a carrier of Au. Minor pyrite concentrates Rh and Re. Mass balance calculations show that BMS play a crucial role in IPGE deportment, whereas they accommodate only up to ~60% of the total Pd. The initial 187Os/188Os values for the whole Uitkomst suite indicate a significant but variable contribution of crustal material to mantle-derived parental melts. Platinum-group elements forming inclusions or presented in solid solution within BMS appear to contribute less to the overall PGE grade than the associated PGMs. The data support the model of a sulfide-oversaturated Uitkomst magma forming a monosulfide solid solution (mss) cumulate as massive sulfide orebody under low-R factor conditions in a shallow conduit after escape of an evolved PGE-rich sulfide liquid from the chamber, leaving the mss relatively poor in PGEs. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.