The documents to your computer and open them with Adobe Reader. For best results viewing and printing PDF documents, it is recommended that you download Part or all of this report is presented in Portable Document Format ISSN: 1044-9612 (print) Table of ContentsĮastern Mineral and Environmental Resources Science CenterĬritical mineral resources of the United States-Economic and environmental geology and prospects for future supply Geological Survey Professional Paper 1802, p. F of Schulz, K.J., DeYoung, J.H., Jr., Seal, R.R., II, and Bradley, D.C., eds., Critical mineral resources of the United States-Economic and environmental geology and prospects for future supply: U.S. Slack, J.F., Kimball, B.E., and Shedd, K.B., 2017, Cobalt, chap. The ecological impacts of cobalt vary widely and can be severe for some species of fish and plants, depending on various environmental factors. Although at low levels cobalt is essential to human health (it is the central atom in the critical nutrient vitamin B12), overexposure to high levels of cobalt may cause lung and heart dysfunction, as well as dermatitis. Legal, economic, and technological barriers have prevented exploitation of these cobalt resources, which lie at water depths of as great as 6,000 meters, although advances in technology may soon allow production of these resources to be economically viable.Įnvironmental issues related to cobalt mining concern mainly the elevated cobalt contents in soils and waters. Additional resources of cobalt are known to occur on the modern sea floor in aerially extensive deposits of Fe-Mn(-Ni-Cu-Co-Mo) nodules and Fe-Mn(-Co-Mo-rare-earth-element) crusts. The total terrestrial cobalt resource (reserves plus other resources) plus past production, where available, is calculated to be 25.5 million metric tons. Seven additional terrestrial deposit types are described in this chapter. Principal terrestrial (land-based) deposit types, which represent most of world’s cobalt mine production, include primary magmatic Ni-Cu(-Co-PGE) sulfides, primary and secondary stratiform sediment-hosted Cu-Co sulfides and oxides, and secondary Ni-Co laterites. The mineralogy of cobalt deposits is diverse and includes both primary (hypogene) and secondary (supergene) phases. China was the leading refiner of cobalt, and much of its production came from cobalt ores, concentrates, and partially refined materials imported from Congo (Kinshasa). production was from mines in which cobalt was the principal commodity. The United States produced a negligible amount of byproduct cobalt as an intermediate product from a PGE mining and refining operation in southeastern Montana no U.S. The Democratic Republic of the Congo (Congo ) was the principal source of mined cobalt globally (55 percent). In 2011, approximately 109,000 metric tons of recoverable cobalt was produced in ores, concentrates, and intermediate products from cobalt, copper, nickel, platinum-group-element (PGE), and zinc operations. Annual global cobalt consumption was approximately 75,000 metric tons in 2011 China, Japan, and the United States (in order of consumption amount) were the top three cobalt-consuming countries. Cobalt is used mostly in cathodes in rechargeable batteries and in superalloys for turbine engines in jet aircraft. Email: is a silvery gray metal that has diverse uses based on certain key properties, including ferromagnetism, hardness and wear-resistance when alloyed with other metals, low thermal and electrical conductivity, high melting point, multiple valences, and production of intense blue colors when combined with silica.
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