Cerro Moro is located within the Deseado Massif, a tectonic block in the central portion of the Santa Cruz Province that covers an area of approximately 60,000 square kilometres. The Deseado Massif is host to several producing and past-producing gold and silver mines, all of the low-sulphidation gold-silver quartz vein deposit type. This deposit type is characterized by quartz veins, stockworks, and breccias that contain gold, silver, electrum, argentite, and pyrite with lesser and variable amounts of sphalerite, chalcopyrite, galena, rare tetrahedrite and sulphosalt minerals that form in high-level (epizonal) to near-surface environments.
The Cerro Moro property is underlain by Tertiary marine sediments, Quaternary gravels and volcanic rocks of Jurassic age assigned to the Bahía Laura Group by Panza et al. (1994).
The current distribution of rock units is strongly controlled by faulting. Stratified rocks generally dip gently to the south but are displaced along numerous faults. Actual displacement vectors on faults are poorly defined and structural observations of veins and fault surfaces show a complex history, with reactivation of fault surfaces showing different displacement vectors during different periods of deformation and resultant mineralization.
Gold-silver mineralization at Cerro Moro is associated with epithermal veins. Geological mapping and ArAr age dating on vein adularia have defined at least three episodes of veining, spread o ........
