The first Phelps Dodge copper mining operation in a foreign country began in 1895 at Nacozari, Sonora, Mexico, when Dr. Louis D. Ricketts, consulting engineer, surveyed the mineral resources of northern Sonora on behalf of Phelps Dodge. Nacozari, located about 75 miles south of Douglas, Arizona, received its name from a well-known landmark in the … Sigue leyendo Nacozari—The Rich Zone