Phelps Dodge Corporation was an American mining company founded in 1834 as an import-export firm by Anson Greene Phelps and his two sons-in-law William Earle Dodge, Sr. and Daniel James. The latter two ran Phelps, James & Co., the part of the organization based in Liverpool, England. The import-export firm at first exported United States cotton from the Deep South to England and imported various metals to the US needed for industrialization. With the expansion of the Western frontier in North America, the corporation acquired mines and mining companies, including the Copper Queen Mine in Cochise County, Arizona and the Dawson, New Mexico coal mines. It operated its own mines and acquired railroads to carry its products. By the late 19th century, it was known as a mining company.
Freeport-McMoRan Inc., often called Freeport, is an American mining company based in the Freeport-McMoRan Center, in Phoenix, Arizona. The company is the world's largest producer of molybdenum, is a major copper producer and operates the world's largest gold mine, the Grasberg mine in Papua, Indonesia.
The Cyprus Mines Corporation was an early twentieth century American mining company based in Cyprus. In 1914, Charles G. Gunther began prospecting in the Skouriotissa area after reading in ancient books that the island was rich in copper and noticing promising ancient Roman slag heaps in the area. The company was established in 1916 by Colonel Seeley W. Mudd, his son, Harvey Seeley Mudd, and mining engineer/business partner, Philip Wiseman, whose family, along with the Mudds, were the primary owners of Cyprus Mines until the early 1970s when it was sold to Amoco.
The National Copper Corporation of Chile, abbreviated as Codelco, is a Chilean state-owned copper mining company. It was formed in 1976 from foreign-owned copper companies that were nationalised in 1971.
In the United States, copper mining has been a major industry since the rise of the northern Michigan copper district in the 1840s. In 2017, the US produced 1.27 million metric tonnes of copper, worth $8 billion, making it the world's fourth largest copper producer, after Chile, China, and Peru. Copper was produced from 23 mines in the US. Top copper producing states in 2014 were Arizona, Utah, New Mexico, Nevada, and Montana. Minor production also came from Idaho, and Missouri. As of 2014, the US had 45 million tonnes of known remaining reserves of copper, the fifth largest known copper reserves in the world, after Chile, Australia, Peru, and Mexico.
In Arizona, copper mining has been a major industry since the 19th century. In 2007, Arizona was the leading copper-producing state in the country, producing 750 thousand metric tons of copper, valued at $5.54 billion. Arizona's copper production was 60% of the total for the United States. Copper mining also produces gold and silver as byproducts. Byproduct molybdenum from copper mining makes Arizona the nation's second-largest producer of that metal. Although copper mineralization was found by the earliest Spanish explorers of Arizona, the territory was remote, and copper could seldom be profitably mined and shipped. Early Spanish, Mexican, and American prospectors searched for gold and silver, and ignored copper. It was not until the completion of the Southern Pacific Railroad in 1876 that copper became broadly economic to mine and ship to market.
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.
The New Cornelia mine is a currently inactive open-pit copper mine in Pima County, Arizona, United States. It was the only productive mine in the Ajo mining district, and is located just outside the town of Ajo, which was built as a company town to serve the New Cornelia mines. The roughly circular pit is one and a half miles across at its widest point, and 1,100 feet deep at the center. Although not generally regarded as a 'dam', the New Cornelia Mine Tailings is often cited as the largest dam structure in the United States with a volume of 7.4 billion cubic feet.
The Climax mine, located in Climax, Colorado, United States, is a major molybdenum mine in Lake and Summit counties, Colorado. Shipments from the mine began in 1915. At its highest output, the Climax mine was the largest molybdenum mine in the world, and for many years it supplied three quarters of the world's supply of molybdenum.
The mineral industry of Peru has played an important role in the nation's history and been integral to the country's economic growth for several decades. The industry has also contributed to environmental degradation and environmental injustice; and is a source of environmental conflicts that shape public debate on good governance and development.
The Bagdad Mine is a large copper mine located in Arizona, in the southwestern part of the United States. Bagdad represents one of the largest copper reserves in the United States and in the world, having estimated reserves of 873.6 million tonnes of ore grading 0.36% copper. It is located in Yavapai County, Arizona, just west of the company town of Bagdad. It is currently owned by Freeport-McMoRan. Copper is produced from chalcopyrite and molybdenum from molybdenite. Copper oxides include chrysocolla, malachite and azurite. The mine's concentrator has a capacity of 75,000 metric tons per day using stockpile leaching, with pressure leaching for molybdenum.
The Henderson molybdenum mine is a large underground molybdenum mine west of the town of Empire in Clear Creek County, Colorado, USA. The Henderson mine, which has produced molybdenum since 1976, is owned by Freeport-McMoRan.
The Toquepala mine is a large porphyry copper mine in the Tacna Province, Tacna Department, Peru. The mine is an open-pit mine producing copper, molybdenum, rhenium and silver with minor gold and zinc.
Thompson Creek Metals Company Inc. was a full cycle mining company with acquisition, exploration, development, and operation in North America. The corporate office was located in Denver, Colorado. The company primarily produced copper, gold, and molybdenum. Over its history, the Company evolved from being a major primary molybdenum producer to becoming a copper and gold mining company with the construction and development of the Mount Milligan mine and concentrator in British Columbia, Canada. Mount Milligan was Thompson Creek Metals principal operation and the company owned 100% of this property. The company also owned 100% of its Thompson Creek Mine in Idaho. Thompson Creek Metals owned 75% joint venture interest in two other properties, including its Endako Mine in British Columbia, and its Langeloth Metallurgical Facility (roaster) in Pennsylvania. Thompson Creek Metals had additional development projects, including the Berg property in British Columbia.
The Sierrita Mine is a large copper mine located in the Sierrita Mountains of Arizona, in the southwestern part of the United States. The mine is located in southern Pima County, southwest of Tucson and west of Green Valley-Sahuarita.
The Rhodesian Selection Trust (RST) was a mining Corporation which produced copper from the Copperbelt region of Northern Rhodesia, now Zambia.
Harold K. Hochschild was the president of the American Metal Company, a conservationist, a philanthropist, and the founder of the Adirondack Museum.
Molybdenum mining in the United States produced 65,500 metric tons of molybdenum in 2014, worth US$1.8 billion. The US was the world's second-largest molybdenum producer, after China, and provided 25% of the world's supply of molybdenum.
American Metal Company was an American nonferrous metal trading and production company.
Cyprus Amax Minerals was a major US-based mining company formed in 1993 through the merger of AMAX with the Cyprus Minerals Company. It was one of the world's largest producers of Molybdenum and Lithium and was a leading producer of copper and coal. It also produced iron ore and gold. It was acquired by the Phelps Dodge Corporation in 1999.
