- 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 ...
Any of several materials and compounds present in, or derived from, natural gas or crude petroleum by physical refining or by chemical reaction.
Industry:Mining
Any of several methods of working coal or ore deposits in which systematic stowing of the worked out areas is part of the system.
Industry:Mining
Any of several modifications of the fundamental Gibbs phase rule, taking into account the number of degrees of freedom consumed by the fixing of physical-chemical variables in the natural environment. The most famous such rule, that of Goldschmidt, assumes that two variables (taken as pressure and temperature) are fixed externally and that consequently the number of phases (minerals) in a system (rock) will not generally exceed the number of components. The Korzhinskii-Thompson version takes into account the external imposition of chemical potentials of perfectly mobile components, and thereby reduces the maximum expectable number of minerals in a given rock to the number of inert components.
Industry:Mining
Any of several modifications of the fundamental Gibbs phase rule, taking into account the number of degrees of freedom consumed by the fixing of physical-chemical variables in the natural environment. The most famous such rule, that of Goldschmidt, assumes that two variables (taken as pressure and temperature) are fixed externally and that consequently the number of phases (minerals) in a system (rock) will not generally exceed the number of components. The Korzhinskii-Thompson version takes into account the external imposition of chemical potentials of perfectly mobile components, and thereby reduces the maximum expectable number of minerals in a given rock to the number of inert components.
Industry:Mining
Any of several native antimony oxides; e.g., stibiconite, cervantite.
Industry:Mining
Any of several reagents used in the froth flotation process. They include pH regulators, slime dispersants, resurfacing agents, wetting agents, conditioning agents, collectors, and frothers.
Industry:Mining
Any of several relatively scarce and valuable metals, such as gold, silver, and the platinum-group metals.
Industry:Mining
Any of several species of pyrobitumens, including dark-colored, comparatively hard and nonvolatile solids, composed of hydrocarbons containing oxygenated bodies, infusible and largely insoluble in carbon disulfide. This includes peat, coal, and nonasphaltic pyrobitumen shales.
Industry:Mining
Any of several stoping methods, including open stopes, sublevel, shrinkage, cut-and-fill, and square set.
Industry:Mining
Any of several systems, including the room-and-pillar system, the block system, and the bord-and-pillar system.
Industry:Mining
