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This list of gold mines in the United States is subsidiary to the list of mines article and lists working, defunct and future mines in the country and is organised by the primary mineral output. For practical purposes stone, marble and other quarries may be included in this list.
Garfield Refining is a Philadelphia, Pennsylvania based refinery specializing in the purchase of precious metal, including gold, silver, platinum and palladium. The company was founded in 1892 and was originally called Eastern Smelting. [1] In 1928, it was purchased by the Garfield family.
In the 1890s, the metal ore smelting businesses were established in Old Colorado City. [5] Golden Cycle Mining and Reduction Company, involved in coal and gold mining, operated a custom mill, treating up to 40,000 tons of Cripple Creek ore each month. [14] The mill had rolls, roasting furnaces, and cyanide equipment. [15]
These mills were fed by four mines known as the Treadwell, 700-Foot, Mexican and Ready Bullion. At this time the mine employed over 2,000 people and was the largest hard rock mine in the world. The gold was 55% free milling and 45% embedded in pyrite, which was extracted using chlorination, smelting, and cyanidation.
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Large-scale open pit gold mining began at Cripple Creek & Victory Gold Mining Company's Cresson Mine and by 2003 had produced 1.62 million gold ounces. [8] The Cripple Creek district has been the largest producer of gold in the state, with more than 22 million ounces mined. [6] 1991 gold Rio Grande County
The company then changed its name to Hudbay Minerals Inc. Hudbay was also listed on the TSX under the symbol HBM. [11] In 2007, Hudbay located a significant zinc deposit near Snow Lake that became known as Lalor. The deposit also contained a large volume of gold, large enough to support its own mine.
Granby Mining and Smelting (among others) various mines at this location, see second ref [44] [45] Pioneer Mine: Au, Ag, Pb, Zn, Cu, Sb, W: Pioneer Mine Bridge River Country: 1897– Later amalgamated with Bralorne Mine [46] Premier Mine
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