THE IMMEDIATE ANTECEDENT OF MEXICO GROUP WAS THE COMPANY AMERICAN SMELTING AND REFINING CO., THAT IN 1965 IS REORGANIZED TO FORM MEXICAN ASARCO WITH 51% OF NATIONAL CAPITAL, LATER IN 1978 THE CONTROLADORA IS CREATED INDUSTRIAL GROUP MINING MEXICO AND AS SUBSIDIARY OF THIS IT INITIATES OPERATIONS MEDISA WITH 66% PROPERTY OF GROUP MEXICO AND 34% OF ASARCO THUS GROUPING ALL THE MINING OPERATIONS OF THE GROUP. FROM 1988 GMEXICO IT HAS PARTICIPATED IN THE LICITATIONS YOU PUBLISH ACQUIRING OF THE FEDERAL GOVERNMENT TO MINER OF COPPER AND MINER CANANEA AND CONSOLIDATING HIS OPERATIONS THROUGH STRATEGIC ASSOCIATIONS THAT HAVE ALLOWED THE EXPANSION HIM OF THEIR BUSINESSES.