- 行业: Mining
- Number of terms: 33118
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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 graphic method of coal-seam correlation, involving the mapping and drawing of both vertical and horizontal sections.
Industry:Mining
A graphic record of the measured or computed physical characteristics of the rock section encountered in a well, plotted as a continuous function of depth. Measurements are made by a sonde as it is withdrawn from the borehole by a wire line. Several measurements are usually made simultaneously, and the resulting curves are displayed side by side on a common depth scale. Both the full display and the individual curves are called logs. Well logs are commonly referred to by generic type, such as resistivity log and radioactivity log, or by specific curve type, such as sonic log and gamma-ray log.
Industry:Mining
A graphic record of the measured or computed physical characteristics of the rock section encountered in a well, plotted as a continuous function of depth. Measurements are made by a sonde as it is withdrawn from the borehole by a wire line. Several measurements are usually made simultaneously, and the resulting curves are displayed side by side on a common depth scale. Both the full display and the individual curves are called logs. Well logs are commonly referred to by generic type, such as resistivity log and radioactivity log, or by specific curve type, such as sonic log and gamma-ray log.
Industry:Mining
A graphic record of the measured or computed physical characteristics of the rock section encountered in a well, plotted as a continuous function of depth. Measurements are made by a sonde as it is withdrawn from the borehole by a wire line. Several measurements are usually made simultaneously, and the resulting curves are displayed side by side on a common depth scale. Both the full display and the individual curves are called logs. Well logs are commonly referred to by generic type, such as resistivity log and radioactivity log, or by specific curve type, such as sonic log and gamma-ray log.
Industry:Mining
A graphic record of the measured or computed physical characteristics of the rock section encountered in a well, plotted as a continuous function of depth. Measurements are made by a sonde as it is withdrawn from the borehole by a wire line. Several measurements are usually made simultaneously, and the resulting curves are displayed side by side on a common depth scale. Both the full display and the individual curves are called logs. Well logs are commonly referred to by generic type, such as resistivity log and radioactivity log, or by specific curve type, such as sonic log and gamma-ray log.
Industry:Mining
A graphic recording of various sonic devices that shows ocean bottom profiles and delineates the bedding planes and dissimilar rock contacts to a depth of 1,500 ft (457 m) into the sediments.
Industry:Mining
A graphic reproduction of a magnified object as seen through a microscope. When it is a photograph, it is called a photomicrograph.
Industry:Mining
A graphic reproduction of the surface of a prepared specimen at a magnification not exceeding 10 diameters. When photographed, the reproduction is known as a photomacrograph.
Industry:Mining
A graphical classification of mineral resources according to economic viability and certainty of existence. Used by the U.S. Bureau of Mines and the U.S. Geological Survey in their definitions of mineral resources and reserves, USGS Circular 831. Named after Vincent E. McKelvey, ninth director of the U.S. Geological Survey.
Industry:Mining
A graphical expression of the functional relation between the velocity function and the times observed in the seismic method of geophysical exploration. It permits time increments to be converted to corresponding depths.
Industry:Mining
