upload
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 ...
kir
Natural asphalt at the surface, Russia.
Industry:Mining
Natural cracks or fractures in rocks. They tend to occur in more or less parallel systems, and when quarry walls are maintained parallel and at right angles to them, they may be utilized as natural partings in the process of block removal.
Industry:Mining
Natural group of sediments or of rocks of related origin.
Industry:Mining
Natural or manmade excavation under the surface of the Earth.
Industry:Mining
Natural or rock asphalt, but the term is sometimes used to describe a rock in which the percentage of impregnation is comparatively low.
Industry:Mining
Natural PbV<sub>2</sub>O<sub>6</sub>; not established as a valid mineral species.
Industry:Mining
Natural water with large amounts of dissolved calcium bicarbonate or calcium sulfate.
Industry:Mining
Naturally abundant and widely exploited in industry. Main useful ores are calcite, dolomite, anhydrite, and gypsum. Apatite is mined for phosphorus; fluorite for fluorides; and colemanite and ulexite for boron.
Industry:Mining
Naturally fused gray siliceous glass; actually a minor rock type varying in composition according to the original sand type, typically 90% to 99.5% silica. Compare: fulgurite; impactite. Also spelled lechatelierite.
Industry:Mining
Naturally occurring molten rock, generated within the Earth and capable of intrusion and extrusion, from which igneous rocks are derived through solidification and related processes. It may or may not contain suspended solids (such as crystals and rock fragments) and/or gas phases. Adj: magmatic.
Industry:Mining
© 2024 CSOFT International, Ltd.