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United States Bureau of Mines
Industry: 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 ...
Portion of a lode below that changed by leaching and secondary enrichment, and characteristic of the type of ore most likely to persist into the deeper levels of a mine.
Industry:Mining
Portion of a sample of sand lying between two size limits, the upper being the limiting and the lower the retaining mesh.
Industry:Mining
Portion of the firing current bypassing part of the blasting circuit through unintended paths.
Industry:Mining
Portion of ventilation system of mine through which contaminated air is withdrawn and evacuated to surface.
Industry:Mining
Portland cement as it comes from the kiln.
Industry:Mining
Positive electron of the same mass as a negative electron; has only transitory existence.
Industry:Mining
Positive ray spectra obtained by means of a mass spectrograph. In such spectra the images due to positive ray particles of different masses are spaced according to the masses of the particles; i.e., according to their atomic weights.
Industry:Mining
Positive separation at the plane of contact between adjacent structural components to allow relative movement arising from differences in temperature or shrinkage.
Industry:Mining
Possibly a silver arsenide.
Industry:Mining
Possibly a tetragonal mineral, Na<sub>2</sub>Co(SCN)<sub>4</sub>.8H<sub>2</sub>O ; a blue thiocyanate that may be an artifact.
Industry:Mining
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