- 업종: 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 ...
A dispersion pattern resulting from widespread rock alteration. Such patterns may outline the boundaries of a group of deposits and thus limit the area that it is necessary to prospect in detail.
Industry:Mining
A dispersion pattern that may be detected by analysis of soil, air, or gas dissolved in underground water, or of gas condensed in the rocks and soil. Gaseous dispersion patterns of interest include those of hydrocarbons and some noble gases resulting from nuclear decay of radioactive elements, and gaseous substances such as Hg, H<sub>2</sub>, He, SO<sub>2</sub>, CO<sub>2</sub>, and CS<sub>2</sub>.
Industry:Mining
A distillation furnace for the reduction of zinc ores containing lead, with a recovery of the latter metal as well as the zinc.
Industry:Mining
A distillation process for the separation of the various components of liquid mixtures. An effective separation can only be achieved by the use of fractionating columns attached to the still.
Industry:Mining
A distinct pause of predetermined time between detonation or initiation pulses, to permit the firing of explosive charges separately.
Industry:Mining
A distinctly laminated lacustrine sediment consisting of clay-rich varves; also the upper, fine-grained, winter layer of a glacial varve.
Industry:Mining
A distinctly laminated lacustrine sediment consisting of clay-rich varves; also the upper, fine-grained, winter layer of a glacial varve.
Industry:Mining
A distorted twiglike lateral projection of calcium carbonate, found in caves, etc. Compare: stalactite; stalagmite. See: anemolite.
Industry:Mining
