- 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 ...
An oxygenated hydrocarbon resembling copal from the blue clay of Highgate, near London, England.
Industry:Mining
An oxygenated hydrocarbon resembling copal from the blue clay of Highgate, near London, England.
Industry:Mining
An oxygenated hydrocarbon resembling copal from the blue clay of Highgate, near London, England.
Industry:Mining
An ultracrushed variety of mylonite, in which primary structures and porphyroclasts have been obliterated so that the rock becomes homogeneous and dense, with little if any parallel structure. Compare: protomylonite; pseudotachylyte.
Industry:Mining
An ultracrushed variety of mylonite, in which primary structures and porphyroclasts have been obliterated so that the rock becomes homogeneous and dense, with little if any parallel structure. Compare: protomylonite; pseudotachylyte.
Industry:Mining
An ultrafine material produced in a disintegrator that has no moving parts but depends on jets of high-pressure superheated steam to reduce the mica to micrometer sizes. Micronized mica is produced in particle size ranges of 10 to 20 mu m and 5 to 10 mu m.
Industry:Mining
An ultramafic plutonic rock that is part of the ijolite series; composed chiefly of titanaugite and magnetite, with a smaller amount of nepheline; a nepheline-bearing clinopyroxenite. Its name, given by Derby in 1891, is derived from Jacupiranga, Brazil.
Industry:Mining
An ultrasonic testing instrument used primarily for the measurement of the thickness of materials.
Industry:Mining
An uncharged elementary particle with a mass that nearly equals that of the proton. An isolated neutron is unstable and decays with a half-life of about 13 min into an electron, a proton, and a neutrino. Neutrons sustain the fission chain reaction in a nuclear reactor.
Industry:Mining
An unconformity at which strata are parallel and the contact is a simple bedding plane.
Industry:Mining
