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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 ...
Banded ore consisting mainly of fluorite and sphalerite in alternate light- and darkcolored layers; occurs in the Cave-in-Rock district of southern Illinois.
Industry:Mining
Banding exhibited by certain igneous rocks of heterogeneous composition; produced by the admixture of two magmas only partly miscible or, in other cases, by magma 2458 intimately admixed with country rock into which it has been injected along bedding or foliation planes.
Industry:Mining
Banding in color and composition of ores caused by diffusion.
Industry:Mining
Banding in rock consisting of flow layers.
Industry:Mining
Bands of coarse-grained quartz and albite or microcline in rock.
Industry:Mining
Bar grizzlies mounted on eccentrics so that the entire assembly is given a forward and backward movement at a speed of some 100 strokes a minute. This is the type of grizzly now generally used ahead of a primary crusher.
Industry:Mining
Bar pulled around by draft animal to actuate winding capstan.
Industry:Mining
Bar pulled around by draft animal to actuate winding capstan.
Industry:Mining
Barite in southeast Missouri. Barite is an orthorhombic mineral, 4(BaSO<sub>4</sub>) ; has nearly pseudocubic cleavage; occurs as interpenetrant masses of crystals with sand and clay (desert roses); sp gr, 4.5; in veins or in residual masses on limestone; the principal source of barium.
Industry:Mining
Barium oxide (BaO), a white hygroscopic compound formed by the burning of barium in oxygen or through the decomposition of other barium salts.
Industry:Mining
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