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United States Bureau of Mines
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 ...
Ore feeder used with stamp batteries to regulate the rate of entry of ore to a mortar box. A horizontal plate is turned by linkages operated when the central stamp falls below a prefixed point; it then draws ore from feeding bin.
Industry:Mining
Ore for which estimates are based on an assumed continuity beyond measured and/or indicated ore. Inferred resources may or may not be supported by samples or measurements.
Industry:Mining
Ore for which tonnage and grade are computed from information similar to that used for measured resources, but the sites for inspection, measurement, and sampling are farther apart or otherwise less adequately spaced. The degree of assurance is high enough to assume continuity between points of observation.
Industry:Mining
Ore imperfectly smelted, mixed with cinder and clay.
Industry:Mining
Ore in fractures that diverge from a major fracture.
Industry:Mining
Ore in which gold is associated with sulfides, as contrasted to free-milling ores, in which the sulfides have been removed by leaching.
Industry:Mining
Ore in which the gangue consists mainly of carbonate of lime.
Industry:Mining
Ore in which the gangue consists principally of alumina.
Industry:Mining
Ore in which the gangue is mainly clay.
Industry:Mining
Ore in which the valuable material is concentrated irregularly as small particles; e.g., coarse gold in low-grade rocks.
Industry:Mining
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