Počet záznamů: 1

Platinum-group elements and gold in base metal sulfides, platinum-group minerals, and Re-Os isotope compositions of the Uitkomst complex, South Africa

SYSNO ASEP	0488682
Druh ASEP	J - Článek v odborném periodiku
Zařazení RIV	J - Článek v odborném periodiku
Poddruh J	Článek ve WOS
Název	Platinum-group elements and gold in base metal sulfides, platinum-group minerals, and Re-Os isotope compositions of the Uitkomst complex, South Africa
Tvůrce(i)	Trubač, Jakub (GLU-S)_{ORCID, RID, SAI} Ackerman, Lukáš (GLU-S)_{RID, SAI, ORCID} Gauert, Ch. (ZA) Ďurišová, Jana (GLU-S)_{RID, SAI} Hrstka, Tomáš (GLU-S)_{RID, SAI}
Zdroj.dok.	Economic Geology. - : Society of Economic Geologists - ISSN 0361-0128 Roč. 113, č. 2 (2018), s. 439-461
Poč.str.	23 s.
Forma vydání	Tištěná - P
Jazyk dok.	eng - angličtina
Země vyd.	US - Spojené státy americké
Klíč. slova	binary alloys ; copper compounds ; economic geology ; gold ; iridium ; isotopes ; ore deposits ; osmium ; palladium ; platinum ; platinum metals ; pyrites ; Rhenium ; rhenium alloys ; ruthenium ; solid solutions ; sulfur compounds ; crustal materials ; mass-balance calculations ; massive sulfides ; mineralized zone ; monosulfide solid solutions ; platinum group elements ; platinum group elements (PGEs) ; platinum group minerals
Vědní obor RIV	DB - Geologie a mineralogie
Obor OECD	Geology
CEP	GA13-15390S GA ČR - Grantová agentura ČR
Institucionální podpora	GLU-S - RVO:67985831
UT WOS	000429317200006
EID SCOPUS	85043366492
DOI	10.5382/econgeo.2018.4557
Anotace	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.
Pracoviště	Geologický ústav
Kontakt	Jana Popelková, popelkova@gli.cas.cz, Sabina Janíčková, Tel.: 233 087 272
Rok sběru	2019

Počet záznamů: 1