- Industry: Mining
- Number of terms: 33118
- Number of blossaries: 0
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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 ...
Record of the radiation spectrum and relative intensities of gamma rays emitted by strata penetrated in drilling. Because of their different energies the relative amounts of radioactivity contributed by different elements can be determined. Compare: gamma-ray well log
Industry:Mining
In bituminous coal mining, a person who works a hand pump to force water, accumulated underground in low places, into a drainage ditch flowing to a natural outlet or pumping station.
Industry:Mining
Brittle shale (the coal miner's "slate") interbedded with thin coalbeds; also, the roof of the Pittsburgh coal in western Maryland.
Industry:Mining
In optical mineralogy, any of the following: indices of refraction, birefringence, optic sign, axial angles, extinction angles, and dispersion of a nonopaque mineral. In ore microscopy (mineragraphy), any of the reflectances and anisotropy of opaque minerals.
Industry:Mining
Lines connecting points of equal times. When the relative seismic velocities are known, the isochrones can be translated into depth contours.
Industry:Mining
Clays termed thixotropic are those that reveal this property by weakening when they are remolded and by increasing in strength when allowed to stand undisturbed.
Industry:Mining
In ion exchange, sized resin spheres, usually +20 mesh, so constituted as to capture ions from pregnant solutions under stated loading conditions and to relinquish them under other (eluting) conditions. Two types are anionic and cationic.
Industry:Mining
Fluid pumped into a borehole through the drill stem, the flow of which cools the bit, washes away the cuttings from the bit, and transports the cuttings out of the borehole.
Industry:Mining
