- 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 ...
If an operation agitates or disperses dust, it is a secondary source.
Industry:Mining
One of the three mutually perpendicular axes that are perpendicular to the principal planes of stress.
Industry:Mining
Ore exposed on two sides. First class, blocks with one side hidden; second class, blocks with two sides hidden; third class, blocks with three sides hidden.
Industry:Mining
Equipment carried in survey aircraft to ensure constant height above ground (not sea) level of 300 ft or 500 ft (91.4 m or 152.4 m)--a critical factor in certain airborne geophysical prospecting and aerial mapping surveys.
Industry:Mining
Pictorial view of an object showing it in plan with oblique lines showing the front, side, and thickness.
Industry:Mining
Hydrothermal alteration typically resulting from removal of sodium, calcium, and magnesium from calc-alkalic rocks, with pervasive replacement of silicates, muting the original rock texture. It is a common style of alteration in porphyry base-metal systems around a central zone of potassic alteration.
Industry:Mining
Land owned, controlled, or heretofore disposed of by the U.S. Government. It includes the land that was ceded to the Government by the original 13 States, together with certain subsequent additions acquired by cession, treaty, and purchase. At its greatest extent, the public domain occupied more than 1,820 million acres (737 million ha).
Industry:Mining
