- 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 ...
A part of the Earth's crust that has attained stability, and has been little deformed for a prolonged period. The term is now restricted to the extensive central areas of the continents.
Industry:Mining
A partially dolomitized limestone, characterized by: a mottled appearance, that gives the rock a texture mimicking that of a breccia; or by a weathered surface that appears fragmental. It is produced diagenetically by selective grain growth in which localized, patchy, and irregularly shaped recrystallized masses of coarse calcite are embedded in a lighter colored and less altered matrix of calcareous mud.
Industry:Mining
A particle accelerator in which charged particles receive repeated synchronized accelerations by electrical fields as the particles spiral outward from their source. The particles are kept in the spiral by a powerful magnet.
Industry:Mining
A particular case of a single consignment where the sampling is to be carried out without prior knowledge of a coal's sampling characteristics other than its presumed ash content and size.
Industry:Mining
A particular make of mechanical and photographic borehole-drift indicators; the singleshot models are small enough to be used in EX diamond-drill holes.
Industry:Mining
A particular site on a stream, canal, lake, or reservoir where systematic observations of gage height, discharge, or water quality (or any combination of these) are obtained.
Industry:Mining
A partition curve drawn to defined conventional scales with the portion showing recoveries over 50% reversed to enclose an error area.
Industry:Mining
