1970

1970

1970 150 150 admin

1971

Four Tennessee zinc mines purchased.

1973

San Xavier copper mine and leach plant in Arizona started production

1974

ASARCO Mexicana, S.A. reorganized as Industrial Minera Mexico, S.A. and 15% interest sold to Mexican investors reducing equity to 34%.

1975

Corporate name changed to ASARCO Incorporated. Amarillo zinc refinery closed. Amarillo copper refinery commenced production.

1976

Southern Peru Copper Corporation opened Cuajone copper mine.

1978

Industrial Minera Mexico, S.A. (IMM) reorganized. ASARCO owns 34% of Mexico Desarrollo Industrial Minero, S.A., a holding company formed to hold shares of IMM and shares of certain IMM operating subsidiaries.

1979

Modernization of El Paso Plant completed. Eisenhower Mining Company, a partnership of Anamax and ASARCO, began mining the Palo Verde copper deposit located between ASARCO’s Mission and San Xavier copper mines