- 업종: 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 hydrothermal vent at the crest of an oceanic ridge; e.g., the East Pacific Rise at the mouth of the Gulf of California. Waters blackened by sulfide precipitates jet out at 1 to 5 m/s at temperatures of at least 350 degrees C. The term refers to uprushing black turbulent suspension. Compare: white smoker.
Industry:Mining
A hydrothermal, deuteric, or metamorphic process involving the introduction of, alteration to, or replacement by sericitic muscovite.
Industry:Mining
A hydrothermally altered andesite resembling a greenstone and containing calcite, chlorite, epidote, serpentine, quartz, pyrite, and iron oxides. The term was first used by Richthofen in 1868. Propylite is common in mining districts of the Western United States, generally in the outermost subzone of hydrothermal alteration.
Industry:Mining
A hydrous arsenate of nickel, cobalt, and magnesium; possibly magnesian annabergite.
Industry:Mining
A hydrous borate of magnesium and potassium, colorless to white. Occurs in small crystals sometimes aggregated. From Stassfurt, Germany.
Industry:Mining
A hydrous borate of magnesium and potassium, colorless to white. Occurs in small crystals sometimes aggregated. From Stassfurt, Germany.
Industry:Mining
A hydrous borate of magnesium and potassium, colorless to white. Occurs in small crystals sometimes aggregated. From Stassfurt, Germany.
Industry:Mining
A hydrous calcium and magnesium borate, CaMgB<sub>6</sub>O<sub>8</sub>(OH)<sub>6</sub>.XH<sub>2</sub>0 ; like hydroboracite but with more water.
Industry:Mining
A hydrous calcium and magnesium borate, CaMgB<sub>6</sub>O<sub>8</sub>(OH)<sub>6</sub>.XH<sub>2</sub>0 ; like hydroboracite but with more water.
Industry:Mining
A hydrous calcium carbonate, CaCO<sub>3</sub>.3H<sub>2</sub>O . A moldlike incrustation on chalk marl. From Nova-Alexandria, Poland.
Industry:Mining
