SPCC acquired the Ilo Copper Refinery from the Peruvian goverment, which by then had a production capacity of 190,000 t/year.
SPCC signed a Basis Agreement with the Peruvian Government and started a Capital Investment program in the amount of $445 million.
Grupo Industrial Minera Mexico S.A. de C.V. acquires the Cananea mining operation.
The La Caridad smelter opened in July 1986 with a capacity of 493 t/day.
La Caridad molybdenum plant began operations in 1985, with a treatment capacity of 2,000 t/day.
Operations began at the new San Luis Potosí zinc refinery, designed to produce 105,000 MT per year.
Grupo Industrial Minera Mexico S.A. de C.V. was established with mexican capital. La Caridad Concentrator Plant began operations in 1979, with a grinding capacity of 72,000 t/day.
It was started the construction of La Caridad, one of the largest mining-metallurgical complexes in the world.
Mexicana de Cobre was established and began operations with explorations at La Caridad deposit in Nacozari, Sonora.
The mining company ASARCO S.A. changed its name to ASARCO Mexicana S.A. de CV, by increasing the Mexican capital share to 51%.