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Manganese is a chemical element with the symbol Mn and atomic number of 25. It is found as the free element in nature (often in combination with iron), and in many minerals. The free element is a metal with important industrial metal alloy uses.
Pages in category "Manganese mines in the United States" The following 5 pages are in this category, out of 5 total. This list may not reflect recent changes. A.
The Chamberlain Manganese Deposits are located in north-central United States near Chamberlain, South Dakota. The Chamberlain Deposits represent one of the largest manganese reserves in the United States having estimated reserves of 2 billion tons of manganese ore grading 0.6% manganese metal. Although plentiful, the grade is so low in ...
The Cuyuna Range mine is a mine located in the north of the United States in Minnesota. Cuyuna Range represents one of the largest manganese reserve in the United States having estimated reserves of 247 million tons of manganese ore grading 8% manganese metal.
Between 1962 and 1968, Matthews Ridge was the location of a large manganese mining operation by Union Carbide. [3] A 38.5-mile (62.0 km) narrow gauge railway was built to Port Kaituma to transport the ore. [4] The mine was closed in 1968. [4] In 2011, it has been reopened by Reunion Manganese Incorporated. [5]
The Maple Mountain mine is a mine located in the north-east of the United States in Maine.Maple Mountain represents one of the largest manganese reserve in the United States, having estimated reserves of 341 million tonnes of manganese ore grading 9% manganese metal.
In 1917, three men—B.R. Jefferson, B. Edwards, and J. Marrs—discovered a manganese deposit with a high concentration of 20% to 40%. [6] Coinciding with World War I, open-pit mining operations began at the mine the same year, supplying the United States military with manganese for military equipment such as steel combat helmets.
Manganese mines in the United States (5 P) ... Pages in category "Mines in the United States" The following 2 pages are in this category, out of 2 total.