- 行业: Mining
- Number of terms: 33118
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The U.S. Bureau of Mines (USBM) was the primary United States Government agency conducting scientific research and disseminating information on the extraction, processing, use, and conservation of mineral resources.
Founded on May 16, 1910, through the Organic Act (Public Law 179), USBM's missions ...
A hand-operated, or power-driven machine for boring shot holes or boreholes, in coal, ore, mineral, or rock.
Industry:Mining
A hand-rotated drilling tool that enables bores to be sunk down to about 20 ft (6 m) in unsupported holes and deeper in cased holes.
Industry:Mining
A hard black amorphous material containing >98% carbon, interbedded among Precambrian schists; probably the metamorphic equivalent of bitumen, but possibly merely impure graphite. Also spelled schungite.
Industry:Mining
A hard red clay found in southwestern Minnesota, formerly used by the Dakota Native Americans for making tobacco pipes. Named after George Catlin (1796-1872), American painter.
Industry:Mining
A hard red clay found in southwestern Minnesota, formerly used by the Dakota Native Americans for making tobacco pipes. Named after George Catlin (1796-1872), American painter.
Industry:Mining
A hard, brittle, pale-yellow to deep-red hydrocarbon (H:C about 1.53) in resinous drops on the walls of a lead mine at Settling Stones, Northumberland, U.K.
Industry:Mining
A hard, brittle, white or gray metallic element. Symbol, W. Also known as wolfram. Found combined in certain minerals such as wolframite, (Fe,Mn)WO<sub>4</sub>; scheelite, CaWO<sub>4</sub>; huebnerite, MnWO<sub>4</sub>; and ferberite, FeWO<sub>4</sub>. Tungsten and its alloys are used extensively for filaments for electric lamps, electron and television tubes, X-ray targets, and numerous space missile and high-temperature applications.
Industry:Mining
