Sonora, Mexico

Porphyry Copper

Located 32 km southwest of the Sasabe Border Crossing between the USA and Mexico, Puertecitos is 40 km west of Sundance's Los Tamales Property and 32 km northeast of the Peñoles Los Humos deposit, a 625 Mt porphyry copper system at a grade of 0.32% Cu.

Workings at Puertecitos consist of a 30 meter deep shaft in the southern part of the property with cross-cuts leading off off the shaft bottom. A series of 24 channel samples taken by Anaconda in 1969 yielded and average grade of 3.45% Cu and 73 gpt Ag in copper oxide mineralization. In 1965, reports indicate that the owner shipped 1518 tonnes grading 4.66% Cu and 68 gpt Ag to the Cananea smelter. Copper mineralization observed on the dump is entirely oxide; chrysocolla, brochantite and cuprite on the fracture surfaces of a quartz monzonite. From the fragments on the dump, it appears that the workings exploited an intrusive breccia, fragments of which contain secondary biotite and sericite. Six hundred meters north of the shaft is a smaller prospect with a 20 m long breccia dike with copper oxides distributed around it. Sercite is widespread in the dike and fragments within it. Copper oxides are widespread in pits around the breccias dike area.

Sundance plans to fly a ZTEM survey over the property in conjunction with a survey over our Los Tamales property to the east. With rock chip and soil sampling, Sundance believes that drill targets can be outlined.