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Located in the state of Chihuahua, it is an underground mine that produces poly-metallic concentrates. The exploited mineral in this mine is extracted and milled in a plant with a nominal capacity of 4,000 tons per day; the mineral is mined through the process of floatation. It produces concentrates of lead, zinc and copper with contents of gold, silver, lead, zinc and copper. It is the unit that gave rise to the name of Minera Frisco.