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Gratiot Copper mine - Gratiot location, Keweenaw County; Dana mine - Central; Datolite mine - Isle Royale, Keweenaw County; Delaware mine - the abandoned town of Delaware, Keweenaw County, twelve miles south of Copper Harbor Delaware Fissure mine; Dover mine - Dover location; Dorchester Mining Company mine - Houghton County
The Delaware Mine is located off U.S. Highway 41, 12 miles (19 km) in Grant Township, Keweenaw County, south of Copper Harbor, Michigan and is a Keweenaw Heritage Site. [1] [2] The Delaware Copper Mine provides tours of one of the oldest copper mines in the Keweenaw, [2] dating back to 1847. The mine had five shafts, with the deepest reaching ...
Porphyry copper deposit beneath the inactive Magma Mine Permitted [14] Back Forty Mine: Menominee County, Michigan: Gold Resource Corp. Volcanogenic massive sulfide: Northmet St. Louis County, Minnesota: Polymet Mining Copper-nickel-PGM deposit in disseminated and massive sulfides in layered mafic intrusion
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).
The Pahaquarry Copper Mine is an abandoned copper mine located on the west side of Kittatinny Mountain presently in Hardwick Township [2] in Warren County, New Jersey in the United States. Active mining was attempted for brief periods during the mid-eighteenth, mid-nineteenth, and early twentieth centuries but was never successful despite ...
Name County Years Material Coordinates Adventure mine: Ontonagon: 1850–1920: copper: Alabastine Mine: Kent: 1907– gypsum: Arcadian mine: Houghton: 1898–1908: copper
The town went through boom periods during the two World Wars, when demand for copper went up again. By the time the mines closed in 1946, according to the U.S. Bureau of Mines, they had produced 72,598,883 pounds of copper worth over $12 million (equivalent to $193,000,000 in 2024). No copper mining has been done since.
This includes mines primarily producing other commodities which also produce limited amounts of copper. The source data is for all 50 states; Alaska and Hawaii produced no copper in 2003 according to the dataset used, so they are omitted from this map for ease of projection and scaling.