Evolution of mineralizing events in the Armadillo vein epithermal system, Martinetas district, eastern Deseado massif, Santa Cruz, Argentina.

DE MARTINO, FACUNDO; ECHEVESTE, HORACIO; JOVIC, SEBASTIÁN; TESSONE, MARIO; RUIZ, REMIGIO; DE BARRIO, RAÚL; FRANCO, SILVIO

Salta

Simposio; 15th Quadrennial Symposium of the International Association on the Genesis of Ore Deposits; 2018

Martinetas mining district is located in the eastern Deseado Massif, Santa Cruz province, Argentina. It ischaracterized by the presence of Au-Ag low sulfidation epithermal veins system, hosted by volcanic and sedimentaryrocks of the Bahía Laura Volcanic Complex. The mineralization is distributed in three sectors: Armadillo, Choique andCentral Vein Zone all of them in production. Armadillo is composed by WNW-ESE quartz veins, with subvertical tohigh dip to the north, with 1 to 3 meters thick. The veins are characterized by banded colloform, filling textures andreplacement of carbonate with "lattice bladed" texture. These veins are associated with minor sheeted veins.