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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.
William Boyce Thompson bought the old Silver Queen Mine in 1910, and by 1912, the new Magma Copper Company was in production running the operations of the Silver Queen Mine. The Magma Copper Company became one Arizona's greatest copper producer after the silver vein of the Queen Silver Mine dried and ran out. [2] [3] [4] [5]
Exploration in 2001-2003 resulted in the discovery of a large copper ore body some 7,000 feet (2,100 m) beneath the surface of lands just three miles (4.8 km) east of Superior. If the mine is eventually reopened, it is highly likely the Magma Arizona will be revived to transport the one billion short tons (910,000,000 t) of ore to off-site ...
A 300-ton-per-day concentrator was built in 1914. In 1915, a narrow-gauge railway connected Superior with the Southern Pacific Railroad, which was converted to standard gauge in 1923. A smelter was built in 1924. [12] After 71 years of production, the Magma Mine closed in August 1982 due to high operating costs and declining copper prices.
Magma was a populated place situated in Pinal County, Arizona, United States. [2] It has an estimated elevation of 1,519 feet (463 m) above sea level. [1]Better known as Magma Junction, it is the junction of the Magma Arizona Railroad with the Southern Pacific mainline, approximately 30 miles east of Superior.
Copper Basin#402 hauling tanks of sulfuric acid from the Winkelman smelter to the Ray mine, to use in their leach operation.. The Copper Basin Railway (reporting mark CBRY) is an Arizona short-line railroad that operates from a connection with the Union Pacific Railroad (UP) at Magma to Winkelman, in 54 miles (87 km) of length.
The Hotel Magma, is a historic hotel located at 100-130 Main Street between North Magma Avenue and Magma Alley in Superior, Arizona. The hotel's initial structure is a two-store reinforced concrete building at 100 Main Street. An adobe addition was built in 1916 but collapsed in 2007. In 1923 a brick addition, labelled "Macpherson's Hotel Magma ...
State Route 177 or SR 177 runs in a north–south direction from Superior, Arizona to Winkelman, Arizona. It ends at two junctions, US 60 to the north and SR 77 to the south. The southern half of this road runs alongside the Gila River and the Copper Basin Railroad. The road passes through or near the towns of Kelvin, Riverside, Kearny and Hayden.