Search results
Results From The WOW.Com Content Network
A 2013 report said that Mineral Park has an estimated reserves of 389 million t (383 million long tons; 429 million short tons) of ore grading 0.14% copper and 31 million oz (1.9 million lb; 880 t) of silver. [1] Large scale copper mining began in the old Mineral Park district in 1963 when Duval Corporation began the open pit operation.
The deposit is a large copper-gold porphyry deposit. [1] The project includes a hydroelectric scheme to provide electricity. [2] and service by the Frieda River Airport. In 2010, the mine had estimated reserves of 14.3 million oz of gold. [3]
The Martin Mine (Gold, copper, lead), produced about 28,000 ounces of gold from two veins between 1911 and 1920, at an average grade of 1 ounce per ton. The Gold Cord Mine (Gold, copper, lead, zinc, tungsten), produced about 16,000 ounces of gold, mainly between 1931 and 1938, from veins with grades ranging for 0.1 to 9 ounces per ton.
Production from 1908 to 1978 was more than 4 billion pounds (1.5 million tonnes) of copper and 2,700,000 troy ounces (84 t) of gold, and 2018 annual production of 106 million pounds (48,000 tonnes) of copper and 37,100 troy ounces (1.15 t) of gold. Published ore reserves at Robinson as of end of 2017 were 565,400,000 pounds (256,500 t) of copper.
Lavender Pit – copper mine in Cochise County, Arizona; Morenci Mine – copper mine in Greenlee County, Arizona; Mountain Iron Mine – iron mine in Mountain Iron, Minnesota; Robinson Mine – copper and gold mine in Ruth, Nevada [8] New Cornelia mine – inactive copper mine near Ajo, Arizona; Ray mine – Asarco copper mine located in Pinal ...
The Safford Mine is an open-pit copper mine located in Graham County, Arizona, eight miles (13 km) north of the city of Safford. The mine is owned and operated by Freeport-McMoran Copper & Gold. Construction on the Safford mine began in mid-2006. Production began December 26, 2007, with full production starting in 2008. [1]
The first Yuba-area miners panned for gold in stream beds in the valley, but within a decade large-scale industrial processes replaced solitary prospectors. Mining companies moved from the valley floor into the Sierra Nevada foothills, where miners blasted gravel hillsides with high-pressure jets of water—a process called hydraulic mining .
It is located on State of Alaska-owned land. The deposit contains a measured and indicated resource of 6.46 billion tonnes of ore grading 0.34 g/t gold, 0.40% copper, and 0.024% molybdenum, for 70.6 million ounces of gold, 56.9 billion pounds of copper, and 3.42 billion pounds of molybdenum (at a 0.3% copper-equivalent cutoff grade). [16]