Southern Copper Corporation is an integrated copper producer. The Company is engaged in producing copper, molybdenum, silver, and zinc. It operates mining units and metallurgical facilities in Mexico and Peru and conducts exploration activities in Argentina, Chile, Ecuador, Mexico and Peru. Its segments include the Peruvian operations, the Mexican open-pit copper mines and the Mexican underground mining operations. The Peruvian operations include the Toquepala and Cuajone mine complexes, and the smelting and refining plants, including a metals plant industrial railroad and port facilities that service both mines. The Mexican open-pit operations include the La Caridad and Buenavista mine complexes, and the smelting and refining plants, including a metals plant and a copper rod plant, and support facilities that service both mines. The Mexican underground mining operations include five underground mines that produce zinc, copper, silver and gold, and a zinc refinery.