- 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 ...
A process of extracting gold and silver as cyanide slimes from their ores by treatment with dilute solutions of potassium cyanide or sodium cyanide. The slimes are subsequently fused and cast into ingots or bullion.
Industry:Mining
A process of fossilization whereby organic matter is converted into a stony substance by the infiltration of water containing dissolved inorganic matter (e.g., calcium carbonate, silica), which replaces the original organic materials, sometimes retaining the structure.
Industry:Mining
A process of fossilization whereby organic matter is converted into a stony substance by the infiltration of water containing dissolved inorganic matter (e.g., calcium carbonate, silica), which replaces the original organic materials, sometimes retaining the structure.
Industry:Mining
A process of fossilization wherein the original hard parts of an animal have additional mineral material deposited in their pore spaces.
Industry:Mining
A process of gold or silver recovery in which the ore, finely divided and suspended in water, is passed over a surface of liquid mercury to form an amalgam that is subjected to fire-refining processes for the recovery of the gold or silver.
Industry:Mining
A process of gold or silver recovery in which the ore, finely divided and suspended in water, is passed over a surface of liquid mercury to form an amalgam that is subjected to fire-refining processes for the recovery of the gold or silver.
Industry:Mining
A process of hydrothermal alteration in which feldspar and muscovite are converted to an aggregate of quartz, topaz, tourmaline, and lepidolite (i.e., greisen) by the action of water vapor containing fluorine.
Industry:Mining
A process of magmatic differentiation involving the formation of a gaseous phase, usually during a late stage in consolidation of the magma, that results in partial expulsion, by escaping gas bubbles, of residual liquid from the crystal network.
Industry:Mining
A process of magmatic differentiation wherein a magma, having crystallized to a mush of interlocking crystals in liquid, is compressed by Earth movements and the liquid 1196 moves toward regions of lower pressure, thus becoming separated from the crystals.
Industry:Mining
A process of magmatic differentiation wherein a magma, having crystallized to a mush of interlocking crystals in liquid, is compressed by Earth movements and the liquid 1196 moves toward regions of lower pressure, thus becoming separated from the crystals.
Industry:Mining
