- 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 genetically related group of orebodies that may have a common root or source rock but that may differ structurally or otherwise.
Industry:Mining
A geologic cross section that combines observed evidence on stratigraphy and/or structure with interpretation of what is not present. It may be the summation or average of several successive cross sections.
Industry:Mining
A geologic illustration that shows in a graphic manner, and by use of conventional symbols for different rock types, the successive rock units that occur throughout a given area or at a specific locality. It may be accompanied by a very brief description of 671 lithology and by appropriate brief notations indicating the thickness, age, and classification of the rocks.
Industry:Mining
A geologic map showing the horizontal area or extent of rock units exposed at the surface.
Industry:Mining
A geologic or metallurgical process in which a binary compound melts at a certain concentration to a liquid of its own composition. Compare: incongruent melting.
Industry:Mining
A geologic section showing as completely as possible a sequence of all the strata in a certain area, in their correct order, thus affording a standard for correlation. It supplements (and sometimes supplants) the type section, esp. for time-stratigraphic units.
Industry:Mining
A geologic structural feature or a combination of such features in which water is confined under artesian pressure.
Industry:Mining
A geologic term for a silt particle having a diameter in the range of 1/128 to 1/64 mm (8 to 16 mu m, or 7 to 6 phi units). In Great Britain, the range 1/100 to 1/20 mm has been used. Also, a loose aggregate of silt consisting of fine silt particles.
Industry:Mining
A geophysical anomaly that is mapped instrumentally at the surface of the ground.
Industry:Mining
