- 行业: 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 ...
A term for an extensive tropical plain, with or without vegetation, applied esp. to the generally treeless plains of northern South America and the Southwestern United States. Etymol: Spanish.
Industry:Mining
A term for large crystals or mineral grains floating in the matrix or groundmass of a porphyry.
Industry:Mining
A term for large crystals or mineral grains floating in the matrix or groundmass of a porphyry.
Industry:Mining
A term for the sum of measured resources plus indicated resources.
Industry:Mining
A term frequently used in connection with conveyors used in gathering service. The mother conveyor receives coal from other conveyors or gathering machines, such as shuttle cars, and delivers it to some central loading point.
Industry:Mining
A term generally restricted to primary foliation parallel to the bedding of sedimentary rocks; i.e., it forms while the sediment is being deposited and compacted. It is the result of the parallelism of the platy materials to the bedding plane, partly because they were deposited that way and partly because they were rotated into this position during compaction.
Industry:Mining
A term introduced to designate minerals, such as olivine and chromite, developed at high temperature in melts containing only a small proportion of volatile (hyperfusible or fugitive) constituents.
Industry:Mining
A term loosely applied to any light-colored, coarse-grained plutonic rock containing quartz as an essential component, along with feldspar and mafic minerals.
Industry:Mining
