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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. In contrast, deeper mineral ...
The Erzberg mine is a large open-pit mine located in Eisenerz, Styria, in the central-western part of Austria, 60 km north-west of Graz and 260 km south-west of the capital, Vienna. The deposit lies at the Northern fringes of the Eastern greywacke zone, a band of Paleozoic metamorphosed sedimentary rocks that run east-west through the Austrian ...
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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; Mountain Iron Mine – iron mine in ...
Under Daniel C. Jackling, in 1905 Nevada Consolidated Copper Corporation (Nevada Con) began copper mining in the Veteran Mine. "The resulting mine was an impressive open-pit and satellite cave." [7] During World War I and until the Great Depression, Nevada Con employed some 1000 - 1200 men in their mines. Mining ended around 1949.
The Ok Tedi Mine is an open-pit copper and gold mine in Papua New Guinea located near the headwaters of the Ok Tedi River, in the Star Mountains Rural LLG of the North Fly District of the Western Province of Papua New Guinea. The mine is operated by Ok Tedi Mining (OTM), which is majority-owned by the PNG Sustainable Development Program Limited ...
The Mexican Mining Chamber (Camimex) opposes the ban on open-pit mining, saying such a prohibition would cause a 1% contraction in the country's GDP and threaten some 200,000 jobs.
The New Cornelia mine is a currently inactive open-pit copper mine in Pima County, Arizona, United States. It was the only productive mine in the Ajo mining district, and is located just outside the town of Ajo, which was built as a company town to serve the New Cornelia mines. The roughly circular pit is one and a half miles across at its ...