- Industri: 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 section of land under which quantities of rock salt or natural brine of usable strength have been discovered and a well, or any number of wells, has been bored for raising the brine.
Industry:Mining
A section of roller conveyor having rolls suitably weighted with liquid to control the velocity of the moving objects.
Industry:Mining
A section of the mine entry from which dust has been removed as completely as possible by scraping or sweeping, aided by a compressed-air blast.
Industry:Mining
A sediment coring device containing a protected glass tube through which water flows freely during descent and which is forced by impact into the sediment. On hauling, a simple valve mechanism closes the top of the tube and the sample may be brought to the surface. The body of the sampler is a brass cylinder into which fits a thinner metal tube holding the glass sampling tube. When the glass tube is in position, it is closed by a rubber bung that comes hard against the upper surface of the main body of the sampler in the center of which is a hole.
Industry:Mining
A sediment coring tube designed to vibrate in such a way as to overcome the resistance of compacted ocean floor sediments, sands, and gravel.
Industry:Mining
A sediment formed in a strongly reducing environment; e.g., coal, sedimentary sulfides, or sedimentary sulfur.
Industry:Mining
A sediment or rock deposited from, or inferred to have been deposited from, a turbidity current. It is characterized by graded bedding, moderate sorting, and well-developed primary structures.
Industry:Mining
A sediment or sedimentary rock that shows evidence of having been subjected to metamorphism.
Industry:Mining
A sediment sampler designed to drop free from a ship to the sea floor, obtain a core, and return to the surface, leaving its expendable weight and casing embedded in the bottom. The free corer consists of two basic assemblies: (1) a recoverable core barrel, check valve, buoyant chamber assembly filled with gasoline; and (2) an expendable weight and casing assembly. When these two assemblies are combined, the core barrel fits loosely inside the casing. The device is dropped over the side of the ship and allowed to fall free 2056 to the bottom. A simple release-delay timer made of magnesium releases the core barrel and its buoyant float rises from the weight and casing assembly.
Industry:Mining
A sediment that has been converted into rock by compaction, deposition of cement in pore spaces, or by physical and chemical changes in the constituents.
Industry:Mining
