The top 10 biggest copper mines in the world
04/11/2013 · Sulphide ore comprises more than 82% of the mine's copper reserves. Cananea, Mexico. Cananea, also known as Buenavista copper mine, loed in Sonora, Mexico, is the world's second biggest copper mine by reserve. The openpit mine was estimated to contain of copper reserve as of December 2012. A total 200,000t of copper was mined ...