- Industry: 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 ...
Broken timber forming roof of ore deposit being extracted by caving methods such as top slicing. It separates the downward gravitating overburden and rock strata from the ore.
Industry:Mining
Brown matter is found in varying amounts in the attrital matter of all splint and semisplint coals; it is occasionally present in the attritus of bright coals. It consists of cell-wall degradation matter and the contents of cells, which in thin sections are brown and semitranslucent. The term has no exact equivalent in the Stopes-Heerlen nomenclature. Constituents with a reflectance between that of vitrinite and fusinite may correspond in part to brown matter. Some brown matter is identical with semifusinite and massive micrinite.
Industry:Mining
Brownish-yellow; mainly sodium or potassium thioantimonite; Na<sub>3</sub>SbS<sub>3</sub>or K<sub>3</sub>SbS<sub>3</sub>. Obtained as a slag in refining antimony.
Industry:Mining
Bullion (gold or silver) weight in a parcel of mineral or metal changing hands. The major value is that of the carrier (e.g., argentiferous lead), but payment is made both for this and for the precious metal.
Industry:Mining
Burma (Myanmar). A local custom in the gem mines at Mogok that permits women to work without licenses in streambeds, tailraces, and dumps from mines and washeries and to keep any gems they find.
Industry:Mining
Burma. Ruby mines in which fissures, caves, and hollows in the limestone, filled with detritus from its disintegration, are followed, and their contents, often cemented or buried under recent travertine, are extracted and washed.
Industry:Mining
By this term in a deed, the grantee has and may enjoy the right to go upon the land and explore for, open, and operate mines, take out and sell the products, and do all things incident to that work.
Industry:Mining
