IANIGLA 20881
INSTITUTO ARGENTINO DE NIVOLOGIA, GLACIOLOGIA Y CIENCIAS AMBIENTALES
Unidad Ejecutora - UE
artículos
Título:
The Permian-Triassic low sulfidation epithermal Au deposit of Don Sixto, Mendoza, Argentina
Autor/es:
WÄLLE, MARKUS; MÁRQUEZ ZAVALÍA, MARÍA FLORENCIA; MUGAS LOBOS, ANA CECILIA
Revista:
Revista de la Asociación Geológica Argentina
Editorial:
Asociación Geológica Argentina
Referencias:
Lugar: Buenos Aires; Año: 2018 vol. 75 p. 441 - 453
ISSN:
0004-4822
Resumen:
Don Sixto is a 252.7±1.3 Ma, low sulfidation epithermal Au deposit located in Mendoza, Argentina. The mineralization in this area (~4 km2) reaches a gold resource of 1,258,000 ounces, occurring as Au-quartz veins and Au-dissemination in volcanic-pyroclastic units closely related to the Choiyoi magmatism. Seven stages of mineralization were recognized, where quartz is the major gangue mineral with lesser adularia and fluorite (± calcite). The most representative vein textures are massive, crustiform and comb. Bladed quartz together with adularia (± calcite) were recognized in the stages 2 and 4. Abundant pyrite and lesser arsenopyrite, chalcopyrite and sphalerite were recognized in most stages. Gold has variable fineness and occurs mainly in the stage 4, together with scarce uytenbogaardtite, acanthite and Se- and Te-bearing minerals. Microthermometry data indicate that mineralizing fluids were diluted (
