Presencia de minerales asbestiformes en la mina de talco La Judita, Yalguaraz, provincia de Mendoza

LOCATI, F.; BONALUMI, A.; LESCANO, L.; SFRAGULLA, J.; MARFIL, S.; MAIZA, P.

San Miguel de Tucumán

Congreso; XX CONGRESO GEOLÓGICO ARGENTINO "Geología, Presente y Futuro"; 2017

Asociación Geológica Argentina

La Judita mine is located at 70 Km NE of Uspallata, in the province of Mendoza, close to San Juan limit. The outcrops are irregular bodies elongated N-S, of small dimensions (with a length not exceeding 500 meters), emplaced on the western flank of the Precordillera. The main work is a quarry from which 500 tons m3 of material was extracted, constituted by talc with minor amount of chlorite, tremolite, calcite and iron oxides and hidroxides. Steatized sector, serpentinized altered zone and the chloritic schist (country rock of intrusive) were analyzed. Two polymorphs of serpentine were identified: antigorite (the main mineral developed during the serpentinization of the ultramafic rock) and chrysotile in veins with irregular distribution. In the intensely altered zone, it was observed that talc is close related with chlorite, calcite and iron oxides. In the talc ore asbestiform morphologies were not distinguished, although in the serpentinitic bodies, close to the mine, asbestiform chrysotile veins were recognized.