The Milpillas mine: Cananea district, Sonora,
01.11.2008· Thus the first ore mining was delayed until early in 2006. and as of mid-2007 the production of cathode copper had not yet reached its targeted level. GEOLOGY AND MINERALIZATION The Cananea mining district is part of a great metallogenic province, economically one of the world's most important, which lies near the southwestern edge of the North American tectonic plate.