- 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 ...
An indication of diesel fuel ignition quality. The cetane number of a fuel is the percentage by volume of cetane in a mixture of cetane and alpha methylnaphthalene, which matches the unknown fuel in ignition quality. American diesel oil usually ranges from 30 to 60 cetane.
Industry:Mining
An indication on a seismic record showing the instant of detonation of a shot or charge. Compare: time signal time mark.
Industry:Mining
An indicator of the temperature at which some reaction took place or some geologic process was active.
Industry:Mining
An indicator of the temperature at which some reaction took place or some geologic process was active.
Industry:Mining
An indicator plant which grows only on zinc-rich soils in the zinc districts of Central and Western Europe.
Industry:Mining
An indirect means of density determination in which a closely spaced gravity traverse is run over some topographic feature, such as a small hill or valley. When the profile of observed values is plotted, the gravitational effect of the feature itself is calculated at each observation point along the profile and removed from the observed value for that point. The calculation is repeated a number of times, different densities being assumed for each computation. The density value at which the hill is least conspicuous on the gravity profile is considered to be most nearly correct.
Industry:Mining
An indirect method of testing porosity and permeability of formations at elevations of proposed structures.
Industry:Mining
An individual particle ejected during a volcanic eruption. It is usually classified according to size.
Industry:Mining
An individual who studies the chemistry of earth materials. May be qualified by the term "inorganic" for the study of nonbiological materials, "organic" for the study of plants and hydrocarbons, and "isotope" for the study of nuclides of the elements. Generally, the geochemist is concerned with the distribution of elements in exploration application or with the cycles of elements in basic science.
Industry:Mining
An inductive method in which the primary coil and the measuring coil are concentric.
Industry:Mining
