The Puertecitos property consists of two claims: Puertecitos, and Puertecitos 2 covering 9,060 hectares. It is located 32 km southwest of the Sasabe border crossing between the US and Mexico, 40 km west of Los Zapata’s Tamales property and 32 km northeast of Peñoles’ Los Humos deposit, a 625 Mt porphyry copper system grading 0.32% Cu.
Mine workings at Puertecitos include a 30 m deep shaft in the southern part of the property with crosscuts leading from the shaft bottom as well as scores of pits throughout the property. A series of 24 channel samples taken by Anaconda in 1969 yielded an average grade of 3.45% Cu and 73 g/t Ag in copper oxide mineralization. In 1965, reports indicate that the owner shipped 1518 tonnes grading 4.66% Cu and 68 g/t Ag to the Cananea smelter.
Widespread copper oxides outcrop at Puertecitos and the presence of sericite and secondary biotite in breccia fragments from dikes and pipes suggest that a porphyry system may exist under the extensive rhyolite flows on the property.
Detailed mapping and geophysical surveys are warranted to test the possible porphyry system at depth.