- 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 ...
Applied to conductors, connected to the general mass of earth in such a manner as will ensure at all times an immediate discharge of electrical energy without danger.
Industry:Mining
Applied to dark-colored rocks, esp. igneous rocks, containing between 60% and 100% dark minerals; i.e., rocks, the color index of which is between 60 and 100. Compare: hypermelanic; leucocratic; mesocratic.
Industry:Mining
Applied to dredges in which the buckets are each connected to the one in front without any intermediate link.
Industry:Mining
Applied to froth flotation when separating fine coal from coal washery slurries. The slurry or mixture is treated with a reagent that has an affinity for the material to be recovered and that will lend itself to subsequent stages in the separation process.
Industry:Mining
Applied to gneissose rocks that have been derived from rocks of igneous origin. Compare: paragneiss
Industry:Mining
Applied to igneous rocks that are intermediate between leucocratic and melanocratic rocks; they contain 30% to 60% dark minerals. Compare: melanocratic; leucocratic.
Industry:Mining
Applied to metals, such as beryllium, magnesium, titanium, and zirconium, that were put into expanded use following World War II.
Industry:Mining
Applied to ores that contain free gold or silver, and can be reduced by crushing and amalgamation without roasting or other chemical treatment.
Industry:Mining
Applied to quarry equipment consisting of two independent channeling machines on a single truck, operated by one person.
Industry:Mining
