- 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 ...
A quarryman's term for the third easiest direction of rock fracture after the rift and the grain.
Industry:Mining
A quarryman's term for the third easiest direction of rock fracture after the rift and the grain.
Industry:Mining
A quartzo-feldspathic rock that has been altered by alkali metasomatism at the contact of a carbonatite intrusive complex. The process is called fenitization. Fenite is mostly alkalic feldspar, with some aegirine, subordinate alkali-hornblende, and accessory sphene and apatite.
Industry:Mining
A quick and convenient method for testing the resistance of a fine-grained soil to penetration at a standard rate of 1/2 in/s (1.27 cm/s). Needles from 1 to 0.05 in<sub>2</sub>(6.5 to 0.3 cm<sub>2</sub>) area are used, and a spring balance indicates the pressure required for the needle to penetrate the soil.
Industry:Mining
A quick investigation of surface or near-surface conditions; no special equipment is employed. Tests are carried out on site for approximate classification of soil and are limited to visual or other simple tests.
Industry:Mining
A quick, easy, and inexpensive method of determining the consolidation of overburden. The process is based on the principle that sound or shock waves travel through different subsurface materials at varying speeds and along different paths. By this method the operator can determine whether overburden can be ripped or whether it will need to be drilled and blasted.
Industry:Mining
A quick, simple method for determining the amount of beryl in a mineral sample. The samples are placed in a hot solution of sodium hydroxide, which etches the beryl grains in the sample; they then are stained an intense blue with another reagent to enable counting under a microscope.
Industry:Mining
