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The Mutanda Mine (French: Mine de Mutanda) is an open-pit copper and cobalt mine in the Lualaba Province of the Democratic Republic of the Congo (DRC). It is the largest cobalt mine in the world. Accidents and spills at the mine have killed workers and polluted nearby rivers and fields.
Copper ore, open pit, heap leached 10–15 (2018) [9] 17 Miami: Gila County, Arizona: Freeport-McMoRan: Copper ore, leached 5 (2021) [2] 18 Carlota Gila County, Arizona: KGHM Polska Miedź: Porphyry copper open pit, producing copper cathode 3.2 (2018) [10] 19 Pumpkin Hollow (see Anaconda) Lyon County, Nevada: Nevada Copper
The El Chino is an open-pit copper mine near Silver City, New Mexico. The Santa Rita mine in southwest New Mexico was the first copper mine in what is now the western United States. Spaniards began mining copper there about 1800. The district still produces copper, from the large Chino Mine open pit.
Musonoi Principal, the oldest open cut, was opened in the 1940s. [1] By 1953 the open pit mine was the largest copper and cobalt producer in the country. [9] Another cut was begun in the 1950s and a third in the 1970s. The three were eventually combined and connected with the Kamoto mines. [1]
In the year ended 30 June 2008, Ruashi produced 10,767 tonnes of copper. [8] Production of copper and cobalt from tailings near the Ruashi Mine continued until December 2008. The second phase, mining the Ruashi ore body, started in the second half of 2008, with refining at the new SX/EW plant. 21,371 tonnes of refined copper were produced in 2009.
The Australian owner of a cobalt mine in Central Idaho plans more extensive study of cobalt at a remote site in the Salmon River Mountains, and the potential for a cobalt refinery, after securing ...
Porphyry copper deposits represent an important resource and the dominant source of copper that is mined today to satisfy global demand. [6] Via compilation of geological data, it has been found that the majority of porphyry deposits are Phanerozoic in age and were emplaced at depths of approximately 1 to 6 kilometres with vertical thicknesses on average of 2 kilometres. [6]
Not all copper deposits contain significant cobalt, but nearly all cobalt in the country is sourced from copper deposits. The DRC produces about 63% of the world's cobalt, with about 80% from industrial copper mines, and the remaining 20% gathered by artisanal mining .