2019
DOI: 10.1093/petrology/egz004
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Platinum-Group Element Geochemistry of the Escondida Igneous Suites, Northern Chile: Implications for Ore Formation

Abstract: Platinum-group element (PGE) geochemistry may be used to constrain the timing of sulfide saturation in magmas, which influences Cu and Au fertility of evolving magmatic systems. We report new geochronological and geochemical analyses, with emphasis on PGE geochemistry, for a suite of regional hornblende-porphyritic diorite intrusions and ore-bearing porphyries from the super-giant Escondida and smaller Zaldivar Cu deposits of Northern Chile. The regional dioritic intrusions have zircon U-Pb ages between 39.6 t… Show more

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Cited by 30 publications
(26 citation statements)
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References 121 publications
(185 reference statements)
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“…This possible duplication of fluid fluxes from the mantle and the evolving magma chamber may potentially explain dramatic vertical extent of copper mineralization at El Teniente as indicated by drilling and geophysical data. Yanacocha [225]; Tres Cruses [219]; Lagunas Norte [226,240]; Quellaveco [228]; Amaro [229]; Cerro Corona [232]; Colosa [233]; Quimsacocha [234]; Junin-Cuellaje [234]; Chaucha [234]; Balsapamba [234]; La Coipa [230]; Los Pelambres [85]; Bajo de la Alumbrera [227]; Escondida [224,238]; El Salvador [222]; El Abra [220]; Paramillos Su [219]; Refugio-Candelaria [223]; Collahuasi-Rosario [231]; El Teniente [218,236,237]; Rio Blanco-Los Bronces [221]; Chuquicamata [235,239].…”
Section: Andean Magmatic Arcmentioning
confidence: 99%
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“…This possible duplication of fluid fluxes from the mantle and the evolving magma chamber may potentially explain dramatic vertical extent of copper mineralization at El Teniente as indicated by drilling and geophysical data. Yanacocha [225]; Tres Cruses [219]; Lagunas Norte [226,240]; Quellaveco [228]; Amaro [229]; Cerro Corona [232]; Colosa [233]; Quimsacocha [234]; Junin-Cuellaje [234]; Chaucha [234]; Balsapamba [234]; La Coipa [230]; Los Pelambres [85]; Bajo de la Alumbrera [227]; Escondida [224,238]; El Salvador [222]; El Abra [220]; Paramillos Su [219]; Refugio-Candelaria [223]; Collahuasi-Rosario [231]; El Teniente [218,236,237]; Rio Blanco-Los Bronces [221]; Chuquicamata [235,239].…”
Section: Andean Magmatic Arcmentioning
confidence: 99%
“…The giant Escondida porphyry system (Figure 15) consists of the Escondida (including Escondida Este), Escondida Norte-Zaldivar, Pampa Escondida and the smaller Baker and Pinta Verde deposits, which together combine for a resource of 25 Gt grading around 0.5-0.6 wt.% Cu (Table 9). The Escondida mining cluster produced 144 million metric tons [219]; Lagunas Norte [226,240]; Quellaveco [228]; Amaro [229]; Cerro Corona [232]; Colosa [233]; Quimsacocha [234]; Junin-Cuellaje [234]; Chaucha [234]; Balsapamba [234]; La Coipa [230]; Los Pelambres [85]; Bajo de la Alumbrera [227]; Escondida [224,238]; El Salvador [222]; El Abra [220]; Paramillos Su [219]; Refugio-Candelaria [223]; Collahuasi-Rosario [231]; El Teniente [218,236,237]; Rio Blanco-Los Bronces [221]; Chuquicamata [235,239].…”
Section: Andean Magmatic Arcmentioning
confidence: 99%
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“…A primary control on metal evolution in arc magmas is exerted by: 1) the timing of sulfide saturation relative to magmatic differentiation and volatile exsolution; 2) the amount of metal segregated into magmatic sulfides; 3) the amount of sulfide formed; 4) and whether sulfides are 'irretrievably lost' or may instead release metals again at later stages (Bai et al, 2020;Chang and Audétat, 2018;Halter et al, 2005;Hao et al, 2019;Mungall et al, 2015;Park et al, 2015Park et al, , 2019Wilkinson, 2013;Zhang and Audétat, 2017). The combined role of these factors has proven difficult to resolve, largely because of the complexity in measuring the metal content of the magmas during their evolution (Park et al, 2019).…”
Section: Introductionmentioning
confidence: 99%