By D. C. Livingston The Pilares de Nacozari mine is located in Sonora, 75 miles south of Douglas, Arizona. The town of Douglas is on the international boundary and is the place at which the ores from the Bisbee mines are smelted. The Moctezuma Copper Co. owns the mines at Nacozari, and the copper concentrates … Sigue leyendo Mining Methods at Nacozari, Sonora, Mexico (1912)