- 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 ...
Spatial distribution patterns of elements, minerals, or mineral assembalages; paragenetic sequences, either syngenetic or epigenetic. Zoning is esp. well developed in the mineralization-alteration assemblages about subvolcanic occurrences such as porphyry base-metal deposits.
Industry:Mining
Special brick in which the total alumina, titania, and alkali are significantly lower than in regular silica brick.
Industry:Mining
Special forms of blasting gelatin, or gelatin and ammonia gelatin dynamites, used in geophysical prospecting by the seismic method; developed to shoot consistently at their characteristic rate of detonation under unusually heavy water pressure.
Industry:Mining
Special heavy paper shells in which dynamite is packed in underwater blasting.
Industry:Mining
Special refractory compositions have been made by sintering mixtures of HfO<sub>2</sub>and TiO<sub>2</sub>in various proportions. The melting point of these sintered bodies was approx. 2,200 degrees C; there appeared to be a phase change at about 1,850 degrees C. Some of the compositions had negative thermal expansions.
Industry:Mining
Special type of gravimeter spring for which the length is proportional to the applied force.
Industry:Mining