- 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 diapir or piercement structure with a central, nearly equidimensional salt plug, generally 1 to 2 km or more in diameter, which has risen through the enclosing sediments from a mother salt bed 5 km to more than 10 km beneath the top of the plug. Many salt plugs have a cap rock of less soluble evaporite minerals, esp. anhydrite. The enclosing sediments are commonly turned up and complexly faulted next to a salt plug, and the more permeable beds serve as reservoirs for oil and gas. Certain salt domes are sources of salt and sulfur. Salt domes are characteristic features of the Gulf Coastal Plain in North America and the North German Plain in Europe, but occur in many other regions. Compare: salt anticline.
Industry:Mining
A diapiric or piercement structure, like a salt dome except that the salt core is linear rather than equidimensional, e.g., the salt anticlines in the Paradox basin of the central Colorado Plateau.
Industry:Mining
A diapiric or piercement structure, like a salt dome except that the salt core is linear rather than equidimensional, e.g., the salt anticlines in the Paradox basin of the central Colorado Plateau.
Industry:Mining
A diastem or other relatively unimportant sedimentary or stratigraphic interruption. Compare: unconformity; paraconformity.
Industry:Mining
A differential having a high-flow gearshift between the drive shaft and the ring gear.
Industry:Mining
A differential that will turn both axles, even if one offers no resistance.
Industry:Mining
A digging and loading machine consisting of a bucket attached to a pair of semicircular runners that when rolled, lifts and dumps the bucket load into a car or other materials transport unit behind the machine.
Industry:Mining
A digging and unloading attachment hung from a crane or excavator. It consists of a split and hinged bucket fitted with curved jaws or teeth which dig into the loose rock while the bucket is being dropped and contract to lift the load while it is being raised. It is used increasingly for mechanical mucking in shaft sinkings.
Industry:Mining
