- 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 ...
Exploring for minerals or mineral fuels, or determining the nature of earth materials by measuring a physical property of the rocks, and interpreting the results in terms of geologic features or the economic deposits sought. Physical measurements may be taken on the surface, in boreholes, or from airborne or satellite platforms.
Industry:Mining
Exploring for minerals or mineral fuels, or determining the nature of Earth materials by measuring a physical property of the rocks and interpreting the results in terms of geologic features or the economic deposits sought. Physical measurements may be taken on the surface, in boreholes, or from airborne or satellite platforms.
Industry:Mining
In the Petersen (or van Veen) type of grab, two semicircular buckets of varying sizes are hinged along a central axis. The buckets are held apart for lowering from a ship to the bottom by some form of catch. On striking the bottom, this is released so that on hoisting, the buckets move around on their axis, take a bite out of the sediment, and come together to form a closed container. With this configuration, the rate at which the grab hits the bottom affects the bite, and when the ship is drifting, a poor sample may be obtained if the grab does not hit the bottom vertically.
Industry:Mining
Intergrowth of sulfide minerals that simulate eutectic texture in metals.
Industry:Mining
Pig iron in which the majority of the carbon is combined with iron in the form of cementite, Fe<sub>3</sub>C , but in which there is also a small amount of graphite. The fractured pig has a white crystalline fracture with clusters of dark spots, indicating the presence of graphite.
Industry:Mining
Conductor made of wood, iron or steel, or wire rope; used to guide the cages in the shaft and to prevent them from swinging and colliding with each other while in motion.
Industry:Mining
