BECAS
PERUSIN Florencia Mariel
congresos y reuniones científicas
Título:
Manifestaciones epitermales en Estancia La Aurora, Noreste del Macizo del Deseado. Estudio comparativo de las vetas Berta y Marixa
Autor/es:
FLORENCIA MARIEL PERUSIN; PILAR MOREIRA; RAÚL FERNANDEZ
Lugar:
Cordoba
Reunión:
Congreso; Congreso de Mineralogía, Petrología Ígnea y Metamorfica y Metalogénesis; 2019
Institución organizadora:
Asociación Mineralógica Argentina y la Comisión de Petrología (COMPETRO) de la Asociación Geológica Argentina
Resumen:
Abstract: Epithermal manifestations in La Aurora Farm, northeast of the Deseado Massif.Comparative study of the Bertha and Marixa veins. These veins are hosted in Chon AikeFormation ignimbrites and lavas, from the middle-upper Jurassic. From the studies carriedout, it was determined that they are composed of six hydrothermal pulses. These pulses aremainly composed of a siliceous filling represented by quartz, which can sometimes beaccompanied by adularia, calcite, sericite and Mn oxides. They present several primarygrowth textures, such as quartz-comb and zonal, as well as recrystallization and replacementtextures. From the characteristics found, it is interpreted as epithermal deposits of lowsulphidation type. According to the geochemical analysis, the Marixa vein showedanomalous values of Au, Ag, Mn, Sb and As. It is interpreted that pulse 4 from this vein, richin oxides of Mn, is the precious metals bearing pulse.
