- 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 ...
The part of an ore, usually metallic, which is economically desirable, as contrasted with the gangue.
Industry:Mining
The part of identified resources that does not meet the economic criteria of reserves and marginal reserves.
Industry:Mining
The part of the Carboniferous strata of the Appalachian field that is now assigned to the Dunkard group of the Permian series. Obsolete.
Industry:Mining
The part of the Carboniferous strata of the Appalachian field that is now assigned to the Monongahela group of the Pennsylvanian series. Obsolete.
Industry:Mining
The part of the Earth's surface that is perennially frozen; the zone of the Earth where ice and frozen ground are formed.
Industry:Mining
The part of the impedance of an alternating-current circuit that is due either to capacitance or inductance or to both and that is expressed in ohms.
Industry:Mining
The part of the rock in a quarry that is next to the surface or to joints and crevices and has been somewhat stained and softened by weathering.
Industry:Mining
The part of the sulfur in coal that is in the form of pyrites or marcasite.
Industry:Mining
The part of the total carbon in steel or cast iron that is present as other than free carbon.
Industry:Mining
