- 産業: Mining
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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 basaltic accumulation of smaller size than the plateau or flood basalts, arising from the confluence of lava flows from a large number of small, closely spaced volcanoes. Compare: plateau basalt.
Industry:Mining
A basaltic rock composed of olivine and clinopyroxene phenocrysts in a groundmass of labradorite with alkali feldspar rims, olivine, clinopyroxene, some leucite, and possibly quartz. Banakite grades into shoshonite with an increase in olivine and clinopyroxene and with less alkali feldspar, and into absarokite with more olivine and clinopyroxene. It was named by Iddings in 1895 from the Bannock (or Robber) Indians.
Industry:Mining
A base map conveying information about something other than the purely geographic; also, a special-purpose map; esp. one designed for purposes of navigation, such as a hydrographic chart or a bathymetric chart.
Industry:Mining
A base or frame made of pieces welded together, as contrasted with a one-piece casting or a bolted or riveted assembly.
Industry:Mining
A baseleveled surface is any land surface, however small, that has been brought approx. to a baselevel, either general or local, by the process of gradation. When such a surface has considerable extent, it becomes a baselevel plain.
Industry:Mining
A baseleveled surface is any land surface, however small, that has been brought approx. to a baselevel, either general or local, by the process of gradation. When such a surface has considerable extent, it becomes a baselevel plain.
Industry:Mining
A basic carbonate of lead, Pb<sub>3</sub>(CO<sub>3</sub>)<sub>2</sub>(OH)<sub>2</sub>. It occurs as a secondary mineral found associated with leadhillite, matlockite, cerussite, mendipite, and paralaurionite.
Industry:Mining
A basic converting process for copper matte in a magnesite-lined converter. The iron of the matte is fluxed by silica added before the process begins.
Industry:Mining
