- 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 ...
One of two kinds of furnaces for the making and founding of brass: (1) a reverberatory furnace for producing large quantities of the alloy, or (2) a crucible furnace for producing small quantities.
Industry:Mining
One of two large groups of igneous rocks, characterized by alkalic and alkali-calcic rocks. Harker (1909) divided all Tertiary and Holocene igneous rocks of the world into two main groups, the Atlantic suite and the Pacific suite, the former being so named because of the predominance of alkalic and alkali-calcic rocks in the nonorogenic areas of crustal instability around the Atlantic Ocean. Because there is such a wide variety of tectonic environments and associated rock types in the areas of Harker's Atlantic and Pacific suites, the terms are now seldom used to indicate kindred rock types; e.g., Atlantic-type rocks are widespread in the mid-Pacific volcanic islands. Compare: Arctic suite; Mediterranean suite.
Industry:Mining
One of two large groups of igneous rocks, characterized by calcic and calc-alkalic rocks. Harker (1909) divided all Tertiary and Holocene igneous rocks of the world into two main groups, the Atlantic suite and the Pacific suite. Because there is such a wide variation in tectonic environments and associated rock types in the areas of Harker's Atlantic and Pacific suites, the terms are now seldom used to indicate kindred rock types. Compare: Mediterranean suite
Industry:Mining
One of two or more heavy straight girders set over and in advance of the last permanent support in a tunnel. They provide protection to the worker until there is space to erect another support.
Industry:Mining
One of various types of apparatus capable of piercing the sea bottom and retaining a sample of the deposit when brought to the surface.
Industry:Mining
One or more rock drills mounted on a wheeled frame; used in tunneling.
Industry:Mining
One or more steel drums, fitted with projecting feet, and towed by means of a box frame.
Industry:Mining
One or more winches mounted on a tractor and used to manipulate parts of bulldozers, scrapers, or other machines.
Industry:Mining
One or several pieces of whole or split parts of core selected as a sample for analysis or assay.
Industry:Mining
