San Xavier copper mine and leach plant in Arizona started production
ASARCO Mexicana, S.A. reorganized as Industrial Minera Mexico, S.A. and 15% interest sold to Mexican investors reducing equity to 34%.
Corporate name changed to ASARCO Incorporated. Amarillo zinc refinery closed. Amarillo copper refinery commenced production.
Southern Peru Copper Corporation opened Cuajone copper mine.
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.
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