Volcan Compañía Minera S.A.A. is a Peruvian polymetallic miner engaged in the exploration and production of zinc, copper, gold, silver, and lead in the country's Sierra Central region. The company is the world's fourth largest producer of zinc and silver, as well as Peru's largest producer of zinc and silver. Its main operations include the Alpamarca, Animón, Cerro de Pasco, Chungar, Vinchos and Yauli mining units. Volcan completed its silver oxides project and Alpamarca silver mine in 2014, part of a US$1bn expansion project.