 GEOLOGY
The San Anton Property is located within the Mesozoic Sierra Madre Oriental terrain and 80 km north of the west northwest trending Late Miocene Trans-Mexico Neovolcanic Belt. The Sierra Madre Oriental terrain is a thin skinned fold-thrust belt of Laramide age (Late Cretaceous-Early Tertiary). High level felsic intrusions emplaced into the western two thirds of the terrain provided the mechanism for hydrothermal activity and mineral deposition. The San Anton Property is known to host a variety of styles of mineral deposits, including porphyry gold-rich copper deposits, intrusion-related gold deposits, epithermal silver-gold deposits, and gold-copper skarn deposits. All of these styles of mineralization are known to occur within the property concessions held by SAM. Historic mining within the San Anton de las Minas area was concentrated on epithermal veins. However, the main area of present interest is the large low grade bulk mineable gold-silver-copper deposit at Cerro del Gallo where a significant mineral resource has been identified.The Cerro del Gallo gold-silver-copper deposit lies within an inlier of deformed clastic sediments and volcanic rocks of probable Triassic-Jurassic age. At Cerro del Gallo, an ash-flow tuff sequence has been intruded by a small elongated upright felsic stock of dacitic to tonalitic composition. The enclosing host rocks have undergone strong pervasive hydrothermal alteration generating a new potassic fine grained replacement assemblage of quartz, K-feldspar, sericite, biotite, pyrite, pyrrhotite, and chalcopyrite. Gold mineralization is concentrated within a gold-rich annulus within wallrock proximal to the felsic intrusion. A gold-bearing skarn has been intersected in drilling south of Cerro del Gallo. Other targets peripheral to the Cerro del Gallo hydrothermal alteration zone remain to be tested. These include coincident magnetic and 3D-induced polarization anomalies on the flanks of the alteration system. |
![Mineralized Stockwork, Cerro del Gallo](javascript:void(open("../../../vm/newca/zoomimage.phtml?imageDescription=Image&clientpk=719&imageFile=04ab1f885b52adc7a11278073b3c4f74.jpg&sentW=448&sentH=336","","scrollbars=yes,width=488,height=376")))