Petrificados (2966 hectares) is strategically located within the Deseado Massif, near mines recognized for their mining potential which constitute the largest active mines of Patagonia Argentina, Cerro Vanguardia’s mine, which is 20 km north and 20 km southeast of Pingüino Project.
The oldest rocks in the property are andesitic flows, volcanic breccias and tuffs from the Bajo Pobre Formation, exposed in the southern part of the area. This unit is overlaid and partially in fault contact with coarse grained-partially welded rhyolitic crystal tuff, from the Chon Aike Formation exposed along the western side of the property. This unit is covered and partially inter-fingered with layered fine grained ash fall tuffs and volcanoclastic sediments assigned to La Matilde Formation, largely exposed in the western and northern portions of the property.
Alteration and mineralization coincides primarily with strongly silicified N°30-N°60 west-trending tabular structures. The silicified zones contain veins, veinlets, stockworks and hydrothermal breccias hosted in welded rhyolitic tuffs. Veins and breccias showed a variety of textures indicatives of multiple episodes of brecciation and silica deposition, including carbonate replacement textures and massive to banded veins with chalcedony, jasper and fine grained sacharoidal white to gray silica, interpreted as being formed at shallow depths within the hydrothermal system.