- 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 medium- to coarse-grained plutonic rock containing major plagioclase, orthoclase, and quartz, with minor biotite, hornblende, and accessory apatite, zircon, and opaque oxides.
Industry:Mining
A medium- to coarse-grained plutonic rock containing major plagioclase, orthoclase, and quartz, with minor biotite, hornblende, and accessory apatite, zircon, and opaque oxides.
Industry:Mining
A melting process in which heat is supplied by a beam of electrons directed at the metal in high vacuum.
Industry:Mining
A member of a geophysical field party whose duty is to obtain permission from landowners for the party to work on their lands, or from public officials for the party to work along highways.
Industry:Mining
A member of a group of elements that are similar chemically to iron. The group includes chromium, cobalt, manganese, nickel, titanium, vanadium, and other elements.
Industry:Mining
A member of a team responsible for advancing the face conveyor as the coal is worked away. In many modern layouts, the armored conveyor is pushed forward by hydraulic rams.
Industry:Mining
A member of the halogen group of elements and the only liquid nonmetallic element. A heavy, reddish-brown liquid that volatilizes readily at room temperature to a poisonous, red vapor with a strong disagreeable odor. Symbol, Br. Obtained from natural brines from wells; little bromine is extracted today from seawater. Used in antiknock gasoline, fumigants, flameproofing agents, water purification compounds, dyes, medicinals, and sanitizers.
Industry:Mining
A member of the hydrocarbon group series (CnH<sub>2</sub>n); e.g., ethylene, propylene.
Industry:Mining
A member of the monoclinic melanterite group, in which iron is partially replaced by zinc.
Industry:Mining
