It is owned by Southern Copper Corporation (SCC), a subsidiary of Grupo Mexico. The world’s second-largest copper mine by reserve and with an annual output of 510kt, it is one of the oldest open-pit mines in North America, having opened back in 1899.

4) Buenavista de Cobreīuenavista de Cobre, also known as Cananea, is a copper mine located in Sonora, Mexico. Morenci is the largest producer of copper in North America. Open for operations since 1872, it is currently operated by Freeport McMoRan, which also owns 85%, while the remaining 15% belongs to Sumitomo Affiliates. Morenci is a copper mine located 16km south of Silver City, Arizona, in the United States with a copper output of 520kt. Discovered in 1988, with operations beginning in 1990, Grasberg is one of the largest open-pit mines in the world. A joint venture between Freeport McMoRan (90.64%) and the Indonesian government (9.36%) and run by PT Freeport Indonesia Co, it produces an annual output of 750kt. Located in the Papua province of Indonesia, Grasberg is not only the second-largest copper mine in the world, but also the largest gold mine in the world (by reserve). It is co-owned by BHP Billiton (57.5%), Rio Tinto Corp. Open since 1990, it is one of the deepest open-pit mines in the world, with its output at 1,270Kt of copper, accounting for 5% of the world’s supply. Named after the Spanish for ‘hidden’, Escondida is a copper mine located Atacama Desert in Northern Chile and is the world’s largest copper mine by output.

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