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United States Bureau of Mines
行业: Mining
Number of terms: 33118
Number of blossaries: 0
Company Profile:
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 ...
Mid. Lump of coal weighing about 1 lb.
Industry:Mining
Mid. Mine air mixed with so much carbonic acid gas as to cause the lights to burn badly or to go out.
Industry:Mining
Mid. To yield or produce gas. A seam of coal that gives off combustible gas is said to make gas.
Industry:Mining
Middle Lower Devonian.
Industry:Mining
Mid-Pleistocene diastrophism.
Industry:Mining
Migmatite of which the mobile portion(s) were formed by exudation (secretion) from the rock itself. Compare: veined gneiss; composite gneiss. Not widely used.
Industry:Mining
Migmatite with appearance of breccia. Compare: contact breccia
Industry:Mining
Migration, by diffusion, of materials from one part of a rock mass to another during metamorphism. Diffusion may involve chemically active fluids from magmatic sources, hot pore fluids, or fluids released from hydrous minerals or carbonates. Ionic diffusion in the solid state may also occur.
Industry:Mining
Mill used for impact crushing of easily broken minerals. An armature carrying swinging hammers, plates, or disks hits the falling stream of rock, dashing particles against one another and against the casing of the mill. See: hammermill
Industry:Mining
Mill used for making very large reductions on slabs by one pass through the mill. The mill consists of two large plain rolls, each surrounded by many small work rolls.
Industry:Mining
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