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United States Bureau of Mines
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 mineral that can form in the presence of free silica, i.e., one that contains the maximum amount of combined silica.
Industry:Mining
A mineral that has crystallized in the orthorhombic, monoclinic, or triclinic system and hence has two optic axes. Compare: uniaxial stone
Industry:Mining
A mineral that has undergone chemical change by geologic (esp. weathering or hydrothermal) processes.
Industry:Mining
A mineral that is a compound of a metal and tellurium, such as hessite, Ag<sub>2</sub>Te .
Industry:Mining
A mineral that is common and abundant in the Earth's crust; one making up large masses of rock. From 20 to 30 minerals are usually considered as being the most important.
Industry:Mining
A mineral that is either present in considerable amounts in a rock or characteristic of the rock; a mineral that distinguishes one variety of rock from another.
Industry:Mining
A mineral that is either present in considerable amounts in a rock or characteristic of the rock; a mineral that distinguishes one variety of rock from another.
Industry:Mining
A mineral that is perhaps a variety of cassiterite.
Industry:Mining
A mineral that is present near an orebody and is related to the processes of ore deposition. Guides help locate ore and may constitute targets for ore search.
Industry:Mining
A mineral that is typically developed in only a narrow range of temperature and pressure. Compare: index mineral
Industry:Mining
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