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The mine is located in southern Pima County, southwest of Tucson and west of Green Valley-Sahuarita. Originally developed as an underground mine in 1907, the Sierrita open pit has been in operation since 1959 and is a copper and molybdenum mining complex, operating on a porphyry copper deposit with oxide, secondary sulfide, and primary sulfide ...
The Rosemont Copper property is located in Pima County, approximately 30 miles (48 km) southeast of Tucson. It straddles two historic mining districts: the Rosemont Mining District and the adjacent Helvetia Mining District. [7] [8] Copper became the focus of mining in the Santa Cruz Valley and elsewhere in Southern Arizona beginning in the late ...
Green Valley is twenty miles (32 km) south of Tucson and 40 miles (64 km) north of Nogales, Sonora, Mexico. Surrounded by copper mines, and near the cycling, hiking and birding areas of the Santa Rita Mountains, Green Valley is an unincorporated retirement community composed of 59 Homeowner Associations.
Mining of the Resolution Copper deposit in Pinal County, potentially the largest copper mine in Arizona, is stalled pending a proposed land swap with the federal government. [17] Resolution Copper has proposed to give the federal government 4,500 acres (18 km 2 ) of environmentally sensitive land in Arizona in exchange for the 3,000-acre (12 km ...
Native American opposition to Rio Tinto and BHP's Resolution Copper mine could prove crucial for the 2024 U.S. presidential vote in the battleground state of Arizona, underscoring the high tension ...
High-grade native copper made Ajo the first copper mine in Arizona. Soon the Arizona Mining & Trading company, formed by Peter R. Brady, a friend of Childs, worked the rich surface ores, shipping loads around Cape Horn for smelting in Swansea, Wales, in the mid-1880s. The mine closed when a ship sank off the coast of Patagonia. Long supply ...
Resolution Copper (RCM) is a joint venture owned by Rio Tinto and BHP formed to develop and operate an underground copper mine near Superior, Arizona, U.S. The project targets a deep-seated porphyry copper deposit located under the now inactive Magma Mine .
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