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Open-pit mining, also known as open-cast or open-cut mining and in larger contexts mega-mining, [ 1 ] is a surface mining technique that extracts rock or minerals from the earth. Open-pit mines are used when deposits of commercially useful ore or rocks are found near the surface where the overburden is relatively thin.
The Siilinjärvi carbonatite complex, [1] an open-pit mine owned by Yara International, in Siilinjärvi, Finland Coal strip mine in Wyoming. Surface mining, including strip mining, open-pit mining and mountaintop removal mining, is a broad category of mining in which soil and rock overlying the mineral deposit (the overburden) are removed, in contrast to underground mining, in which the ...
The Tagebau Hambach is a large open-pit coal mine (German: Tagebau) in Niederzier and Elsdorf, North Rhine–Westphalia, Germany. It is operated by RWE and used for mining lignite. The mine is on the site of the ancient Hambach Forest, which was purchased by RWE in 1978. The company then cut most of the forest down and cleared it to mine.
The Hull–Rust–Mahoning Open Pit Iron Mine in Hibbing, Minnesota, United States, is the largest operating open-pit iron mine in Minnesota. The pit stretches more than three miles (5 km) long, two miles (3 km) wide, and 535 feet (163 m) deep. [ 2 ] It was established in 1895 and was one of the world's first mechanized open-pit mines.
Year of acquisition. 1986. Millerite - Arsenian Pyrite specimen from the underground Meikle mine, Goldstrike complex. Goldstrike is a gold mine in Eureka County in north-eastern Nevada. It is located on the Carlin Trend, a prolific gold mining district. It is owned and operated by Barrick Gold. Since Barrick acquired Goldstrike in 1986, until ...
The workings include a large open pit mine 2.4 kilometres (1.5 mi) wide at the surface completed in 2019, three operating underground mines (Grasberg Block Cave, Deep Mill Level Zone and Big Gossan) and four concentrators. The mine is a high-volume, low-cost underground mining operation, producing and milling more than 72 million tonnes of ore ...
Fort Knox mine – gold mine in the Fairbanks mining district of Alaska. Hull–Rust–Mahoning Open Pit Iron Mine – largest open pit iron mine in the world, near Hibbing, Minnesota [7] Lavender Pit – copper mine in Cochise County, Arizona. Morenci Mine – copper mine in Greenlee County, Arizona.
PolyMet Mine. Coordinates: 47°37′49″N 91°54′22″W. PolyMet mine. The PolyMet Mine or NorthMet Mining Project is a proposed mining and processing operation in the NorthMet Deposit in northeastern Minnesota, United States, [1] six miles (10 km) south of Babbitt, Minnesota. [2] The project is controversial with potential environment ...