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Currently, auctions are asking between $2 and $3 per pound for quantities of 10 to 25 pounds of coins. One auction featured 100,000 pennies -- weighing about 680 pounds -- that sold for $1,500 ...
Over 60% of the newly mined copper in the U.S. comes from Arizona. When copper traded for an average of $3.30/pound, copper production generated nearly $5 billion for Arizona's economy in 2006 and $5.5 billion in 2007. The first mineral to be mined in Arizona was, as in many other regions, gold.
Development of the property was delayed because of its remote location in the Sonoran Desert. The low-grade copper ore could not be economically shipped to a smelter, and had to be concentrated at the site. The Cornelia Copper Company was organized by businessmen from St. Louis in 1900 to develop the property. However, early owners fumbled in ...
Many copper mines have existed in the Copper Country of the U.S. state of Michigan. These include both large-scale commercial ventures and small operations. These include both large-scale commercial ventures and small operations.
Mining began in 1848, and from 1855 through 1862, the Minesota was the most productive copper mine in the United States. [1] The mine had ten shafts, the deepest of which extended to a depth of 1200 feet (366 m). In 1856, miners tunneled into a 527-ton (478 mt) mass of native copper, the second-largest such mass found in the Copper Country.
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: Freeport-McMoRan: Copper ore, leached 5 (2021) [2] 18 Carlota Gila County, Arizona: KGHM Polska Miedź: Porphyry copper open pit ...
The Quincy Mining Company Stamp Mills Historic District is a historic stamp mill (used to crush copper-bearing rock, separating the copper ore from surrounding rock) located on M-26 near Torch Lake, just east of Mason in Osceola Township. [2] It was listed on the National Register of Historic Places in 2007. [1]
The mine was started as the Chino Copper Company in 1909 by mining engineer John M. Sully and Spencer Penrose, [1] [2] [3] and is currently owned and operated by Freeport-McMoRan Inc. subsidiaries. The area where the mine is located is at an average elevation of 5,699 feet (1,737 m).
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