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The mine produces copper and molybdenum concentrate as well as SX/EW copper cathode from a ROM oxide-leaching system. [1] Sierrita was acquired by Duval Corporation in 1959; Pennzoil acquired a controlling interest in Duval in 1968. [2] Sierrita was operated by Cyprus Mines (later Cyprus Amax Minerals) from 1986 to 1999.
The Sierrita Mountains (English: "Little Mountains") is a minor mountain range about 40 mi (60 km) southwest of Tucson, in Pima County, Arizona. Historically, the area has seen extensive mining and ranching activity: several ranches, abandoned mines, and the large Sierrita Mine are located in the area. The highest point in the mountains is ...
The Calumet and Arizona Mining Company organized in March, 1901 and operated several large and profitable mines adjacent to the Copper Queen. By 1907, the C&A was the fourth-most productive copper mine in Arizona, and ran its own smelter in Douglas, Arizona .
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 ...
Anti-mining protests that have roiled Panama for the last two weeks turned deadly on Tuesday when a man allegedly shot and killed two demonstrators, according to police. Protests against copper ...
Underground mine producing nickel and copper concentrates 18 (2018) [8] 15 Phoenix Lander County, Nevada: Newmont Mining Corporation: Gold-copper ore, concentrated and leached 16 (2018) [6] 16 Lisbon Valley San Juan County, Utah: Lisbon Valley Mining Company Copper ore, open pit, heap leached 10–15 (2018) [9] 17 Miami: Gila County, Arizona ...
In northern Peru, the World Bank's business-lending arm is part owner of the Yanacocha gold mine, accused by impoverished farming communities of despoiling their land in pursuit of the precious ore. The bank and IFC have stepped up investments in projects deemed to have a high risk of serious and environment damage, including oil pipelines, mines and even coal-fired power plants, an ...
Frustration, lengthy commutes, lack of trust: Federal employees explain why they accepted Trump's buyout offer.