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The Mountain Pass Rare Earth Mine and Processing Facility, owned by MP Materials, is an open-pit mine of rare-earth elements on the south flank of the Clark Mountain Range in California, 53 miles (85 km) southwest of Las Vegas, Nevada. In 2020 the mine supplied 15.8% of the world's rare-earth production.
The Big Hole – a former diamond mine in Kimberley, dug to 240 m (790 ft) between 1871 and 1914, making it the deepest hand-excavated pit in the world.Now a museum. The Jagersfontein Mine – operating between 1888 and 1971.
[5] [6] Mining at the site by shafts began in the 1920s. Pacific Coast Borax later became U.S. Borax, which subsequently opened the current open-pit mine in 1957. U.S. Borax was later acquired by Rio Tinto Group, which continues to operate the mine. A pilot project to produce lithium by sifting through mining waste began in 2019. [7]
The Atlas Asbestos Mine Superfund Site is located within the Clear Creek Management Area near Fresno County, eighteen miles northwest of Coalinga, California. The mine started operating in 1963, covering 435 acres of a large naturally occurring asbestos deposit.
Mining stopped in 1975; now open for tours Lavender Pit: Bisbee, Cochise County, Arizona: Phelps Dodge: Porphyry copper: Closed in 1974 United Verde Mine: Jerome, Yavapai County, Arizona: Phelps Dodge: Closed in 1953 Iron Mountain: Shasta County, California: Volcanogenic massive sulfide: Operated 1860s to 1963; now a superfund site Minesota ...
Leviathan Mine is a United States superfund site (CERCLIS ID: CAD98067685) at an abandoned open-pit sulfur mine located in Alpine County, California. The mine is located on the eastern slope of the Sierra Nevada at about 7,000-foot (2,100 m) elevation, 6 miles (9.7 km) east of Markleeville and 24 miles (39 km) southeast of Lake Tahoe. The mine ...
A large borax deposit was discovered in 1925, [25] and the mining town of Boron was established soon thereafter. This borax deposit is now the world's largest borax mine. [23] It is owned by Rio Tinto Minerals (formerly U.S. Borax). It is operated as an open-pit mine, the largest open-pit mine in California.
Iron Mountain Mine, also known as the Richmond Mine at Iron Mountain, is a mine near Redding in Northern California, US. Geologically classified as a "massive sulfide ore deposit", the site was mined for iron , silver , gold , copper , zinc , quartz , and pyrite intermittently from the 1860s until 1963.