Cosalá Operations
| Nuestra Señora | |
| Located in the Cosalá district, Nuestra Señora is a fully mechanized underground silver-zinc-lead-copper mine with the benefit of flexible mining methods and diversified metal production. With a processing facility nearby, the operation has a capacity of 1,600 tonnes per day and permitted capacity for expansion to 4,000 tonnes per day. The plant produces zinc, copper and lead concentrates, with a significant silver component in the copper and lead concentrates. Concentrates are delivered to purchasers in Manzanillo, Mexico. Geology Mineralization at the Nuestra Señora mine occurs in four known deposits located within a 500m by 250m area - Nuestra Señora, Candelaria, Santa Teresa and Santo Domingo - which were originally developed and exploited from 1954 to 1965 by Asarco. Carbonate replacement-style mantos, veins, chimneys, chimney breccias, and mineralized exoskarn and endoskarn occur within limestone and granodiorite. Pyrite, sphalerite, chalcopyrite, galena, and lesser tetrahedrite are the dominant sulfide minerals. | |
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