Re–Os isotope systematics for the Lince–Estefanía deposit: constraints on the timing and source of copper mineralization in a stratabound copper deposit, Coastal Cordillera of Northern Chile

Tristá-Aguilera, Dania; Barra, Fernando; Ruíz, Joaquin; Morata, Diego; Talavera-Mendoza, Óscar; Kojima, Shoji; Ferraris, Fernando

doi:10.1007/s00126-006-0048-8

Cited by 37 publications

(18 citation statements)

References 23 publications

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“…Among the few isotopic methods applicable to hydrothermal base metal deposits, Rb-Sr and Re-Os dating of sulfides have attained increasing attractivity as these techniques allow for direct dating of common ore-forming minerals. The Re-Os chronometer, mostly utilized to date molybdenite (see Stein et al 2001 and references therein), has been successfully applied to some common Cu-Fe sulfide minerals in a number of recent studies, including pyrite, chalcocite, and bornite (e.g., Stein et al 2000;Morelli et al 2004;Tristá-Aguilera et al 2006). Like molybdenite, these sulfides may have extremely low concentrations of highly radiogenic Os, for which they have been termed LLHR (low-level, highly radiogenic) minerals by Stein et al (2000).…”

Section: Introductionmentioning

confidence: 99%

Concordant ages for the giant Kipushi base metal deposit (DR Congo) from direct Rb–Sr and Re–Os dating of sulfides

2007

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We report concordant ages of 451.1±6.0 and 450.5±3.4 Ma from direct Rb-Sr and Re-Os isochron dating, respectively, of ore-stage Zn-Cu-Ge sulfides, including sphalerite for the giant carbonate-hosted Kipushi base metal (+Ge) deposit in the Neoproterozoic Lufilian Arc, DR Congo. This is the first example of a world-class sulfide deposit being directly dated by two independent isotopic methods. The 451 Ma age for Kipushi suggests that the ore-forming solutions did not evolve from metamorphogenic fluids mobilized syntectonically during the Pan-African-Lufilian orogeny but rather were generated in a Late Ordovician postorogenic, extensional setting. The homogeneous Pb isotopic composition of the sulfides indicates that both Cu-Ge-and Zn-rich orebodies of the Kipushi deposit formed contemporaneously from the same fluid system. The sulfide Pb isotope signatures in combination with initial 87 Sr/ 86 Sr and 187 Os/ 188 Os ratios defined by the isochrons point to metal sources located in the (upper) crust. The concordant Re-Os and Rb-Sr ages obtained in this study provide independent proof of the geological significance of direct Rb-Sr dating of sphalerite.

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Section: Introductionmentioning

confidence: 99%

Concordant ages for the giant Kipushi base metal deposit (DR Congo) from direct Rb–Sr and Re–Os dating of sulfides

2007

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“…6c). Re-Os isotopic system can be perturbed by a variety of processes such as hydrothermal or supergene alteration, deformation, and metamorphism (Lambert et al, 1998;Morelli et al, 2004;Ruiz and Mathur, 1999;Tristá-Aguilera et al, 2006).…”

Section: Open Behavior Of the Re-os Isotopic Systemmentioning

confidence: 99%

In-situ LA-ICP-MS trace elemental analyses of magnetite and Re–Os dating of pyrite: The Tianhu hydrothermally remobilized sedimentary Fe deposit, NW China

Huang

Gao

et al. 2015

Ore Geology Reviews

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“…Jurassic CMT deposits often occur near basic to intermediate sub-volcanic intrusive bodies but these intrusives are largely un-mineralized and some of them even postdate copper mineralization (e.g. Espinoza et al, 1996;Tristá-Aguilera et al, 2006). Available geochronological data suggest primary sulfide ores, although epigenetic, were emplaced shortly after deposition of the volcanic rocks and associated diorite intrusion (e.g.…”

Section: Geological Settingmentioning

confidence: 99%

“…Available geochronological data suggest primary sulfide ores, although epigenetic, were emplaced shortly after deposition of the volcanic rocks and associated diorite intrusion (e.g. Oliveros et al, 2008;Tristá-Aguilera et al, 2006).…”

Section: Geological Settingmentioning

confidence: 99%

“…Stratabound manto-type Cu-(Ag) deposits (Kojima et al, 2009;Maksaev and Zentilli, 2002;Sato, 1984;Sillitoe, 1989, Tristá Aguilera et al, 2006 are widely distributed in the Jurassic to Lower Cretaceous volcanosedimentary sequences of the Coastal Range of north and north-central Chile. These Chilean manto-type (CMT) deposits are relatively high grade, e.g.…”

Section: Introductionmentioning

confidence: 99%

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Extremely negative and inhomogeneous sulfur isotope signatures in Cretaceous Chilean manto-type Cu–(Ag) deposits, Coastal Range of central Chile

Carrillo-Rosúa

Boyce

Morales-Ruano

et al. 2014

Ore Geology Reviews

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ABSTRACT:Chilean manto-type (CMT) Cu(-Ag) hydrothermal deposits share a characteristic association of volcanosedimentary Jurassic to Lower Cretaceous host rocks, style of mineralization, ore and associated mineralogy and geochemistry, with ore grades typically >1%Cu, that make this family of deposits significant and interesting, both academically and economically. Although often stratabound, geological evidence supports an epigenetic origin for these deposits. We present a detailed stable isotope study of La Serena and Melipilla-Naltahua Lower Cretaceous deposits, central Chile, which reveals extremely negative δ 34 S values, to -50‰, which are among the lowest values found in any ore deposit. In addition, the range of δ 34S values from sulfides in the two areas is very wide: -38.3 to -6.9‰ in La Serena, and -50.4 to -0.6‰ in Melipilla-Naltahua. These new data significantly extended the reported range of δ 34 S data for CMT deposits. Co-existing sulfates range from 7.9 to 14.3‰, and are exclusive to La Serena deposit. The wide sulfide isotopic range occurs at deposit and hand specimen scale, and suggests a polygenic sulfur source for these deposits, where bacteriogenic sulfide dominates. While sulfur isotope data for the bulk of Jurassic CMT deposits, northern Chile, suggests a predominant magmatic source in their origin (mean = -2.7 ± 1.9‰, 1σ), contributions of a magmatic component is only likely to be involved at Melipilla-Naltahua deposit.

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Re–Os isotope systematics for the Lince–Estefanía deposit: constraints on the timing and source of copper mineralization in a stratabound copper deposit, Coastal Cordillera of Northern Chile

Cited by 37 publications

References 23 publications

Concordant ages for the giant Kipushi base metal deposit (DR Congo) from direct Rb–Sr and Re–Os dating of sulfides

Concordant ages for the giant Kipushi base metal deposit (DR Congo) from direct Rb–Sr and Re–Os dating of sulfides

In-situ LA-ICP-MS trace elemental analyses of magnetite and Re–Os dating of pyrite: The Tianhu hydrothermally remobilized sedimentary Fe deposit, NW China

Extremely negative and inhomogeneous sulfur isotope signatures in Cretaceous Chilean manto-type Cu–(Ag) deposits, Coastal Range of central Chile

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