info:eu-repo/semantics/article
Metallogeny of the Paramillos de Uspallata Pb–Zn–Ag vein deposit in the Cuyo Rift Basin, Argentina
Fecha
2018-05Registro en:
Rubinstein, Nora Alicia; Carrasquero, Silvia I.; Gómez, Anabel; Orellano Ricchetti, Ana Paula; D'annunzio, María Celeste; Metallogeny of the Paramillos de Uspallata Pb–Zn–Ag vein deposit in the Cuyo Rift Basin, Argentina; Elsevier France-editions Scientifiques Medicales Elsevier; Comptes Rendus Geoscience; 350; 4; 5-2018; 164-172
1631-0713
CONICET Digital
CONICET
Autor
Rubinstein, Nora Alicia
Carrasquero, Silvia I.
Gómez, Anabel
Orellano Ricchetti, Ana Paula
D'annunzio, María Celeste
Resumen
The Paramillos de Uspallata deposit, previously considered as genetically linked to a Miocene porphyry deposit, is located in the Mesozoic Cuyo Basin, which was formed during the beginning of the break-up of Gondwana. In the present study, both previous information and new geological, mineralogical, and isotopic data allowed outlining a new descriptive model for this deposit. Stratigraphic and structural controls allowed considering this deposit as contemporaneous with the Mesozoic rifting, with the mineralization resulting from a Pb–Zn stage followed by an Ag–Cu–Pb stage. The hydrothermal fluids were found to have low temperature and low to moderate salinity, and to result from the mixing between metamorphic and meteoric fluids, with the lead sourced by the igneous Paleozoic basement and the sulfur partly derived from a magmatic source. These characteristics allow describing Paramillos de Uspallata as Pb–Zn–Ag veins hosted in clastic sedimentary sequences genetically linked to a rift basin and redefining it as detachment-related mineralization.