Ore paragenesis of the Tajo Vein, Paramillos de Uspallata ore deposit, Mendoza Province, Argentina

Acta Geológica Lilloana 25(1-2)2013

Authors

  • Silvia I. Carrasquero Universidad Nacional de La Plata (UNLP) - Instituto de Recursos Minerales (INREMI), cal
  • Nora A. Rubinstein IGEBA (CONICET-Universidad de Buenos Aires). Departamento de Geología, Pabellón 2, Ciudad Universitaria C.A.B.A., Argentina.
  • Richard E. Bevins Department of Geology, National Museum of Wales, Cathays Park, Cardiff, UK.

Keywords:

Ore paragenesis, mineral chemistry, Tajo Vein, Paramillos de Uspallata ore deposit, Precordillera of Mendoza Province

Abstract

The Tajo Vein is part of the Paramillos de Uspallata ore de- posit (32°28’29.6”S; 69°08’46”W) that is located in the Western Precordillera of Mendoza Province. This ore deposit consists of Pb-Zn-Ag veins hosted by Triassic-Jurassic basalts and Triassic sedimentary rocks. Mineralogical studies (optical microscopy and SEM-EDX analyses) carried out on samples from the Tajo Vein allowed the identification of an ore paragenesis consisting of Ag-galena, sphalerite, chalcopyrite, tetrahedrite, freibergite, boulangerite, owy- heeite, pyrite, arsenopyrite and marcasite, occurring in two mineralization stages, the first consisting of Pb-Zn-Ag-(Cu) mineralization with a carbonate gangue and the barren second one with a quartz gangue. Chemical analyses allowed to determine the composition of the ore min- erals and the Ag-bearing phases.

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Author Biography

Nora A. Rubinstein, IGEBA (CONICET-Universidad de Buenos Aires). Departamento de Geología, Pabellón 2, Ciudad Universitaria C.A.B.A., Argentina.

e-mail alternativo:

nora@gl.fcen.uba.ar

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Published

2013-12-07

How to Cite

Carrasquero, S. I., Rubinstein, N. A., & Bevins, R. E. (2013). Ore paragenesis of the Tajo Vein, Paramillos de Uspallata ore deposit, Mendoza Province, Argentina: Acta Geológica Lilloana 25(1-2)2013. Acta Geológica Lilloana, 25(1-2), 3–8. Retrieved from https://www.lillo.org.ar/journals/index.php/acta-geologica-lilloana/article/view/522
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Acta Geológica Lilloana 25 (1-2) (2013)

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