Platinum-Group Elements and Gold in Base Metal Sulfides, Platinum-Group Minerals, and Re-Os Isotope Compositions of the Uitkomst Complex, South Africa
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00025798%3A_____%2F18%3A00000145" target="_blank" >RIV/00025798:_____/18:00000145 - isvavai.cz</a>
Nalezeny alternativní kódy
RIV/67985831:_____/18:00488682 RIV/00216208:11310/18:10376690
Výsledek na webu
<a href="http://dx.doi.org/10.5382/econgeo.2018.4557" target="_blank" >http://dx.doi.org/10.5382/econgeo.2018.4557</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.5382/econgeo.2018.4557" target="_blank" >10.5382/econgeo.2018.4557</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Platinum-Group Elements and Gold in Base Metal Sulfides, Platinum-Group Minerals, and Re-Os Isotope Compositions of the Uitkomst Complex, South Africa
Popis výsledku v původním jazyce
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 ~60percent 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.
Název v anglickém jazyce
Platinum-Group Elements and Gold in Base Metal Sulfides, Platinum-Group Minerals, and Re-Os Isotope Compositions of the Uitkomst Complex, South Africa
Popis výsledku anglicky
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 ~60percent 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.
Klasifikace
Druh
J<sub>imp</sub> - Článek v periodiku v databázi Web of Science
CEP obor
—
OECD FORD obor
10505 - Geology
Návaznosti výsledku
Projekt
<a href="/cs/project/GA13-15390S" target="_blank" >GA13-15390S: Re-Os geochronologie rudních mineralizací Českého masivu a důsledky pro jejich metalogenezi</a><br>
Návaznosti
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Ostatní
Rok uplatnění
2018
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
Economic Geology
ISSN
0361-0128
e-ISSN
—
Svazek periodika
113
Číslo periodika v rámci svazku
2
Stát vydavatele periodika
US - Spojené státy americké
Počet stran výsledku
24
Strana od-do
439-461
Kód UT WoS článku
000429317200006
EID výsledku v databázi Scopus
2-s2.0-85043366492