- 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 ...
Introducing carbon and nitrogen into the surface of a steel alloy by heating in a bath of molten sodium cyanide and usually followed by quench hardening.
Industry:Mining
Introducing spiegeleisen into the converter after the blow to add the desired element.
Industry:Mining
Introduction of or replacement by pyrite; e.g., the replacement of original fossil material by pyrite. A common hydrothermal introduction of pyrite specks in rock adjacent to veins.
Industry:Mining
Introduction of, alteration to, or replacement by, a mineral or minerals of the zeolite group. This process occurs chiefly in rocks containing calcic feldspars or feldspathoids, and is sometimes associated with copper mineralization.
Industry:Mining
Introduction of, alteration to, or replacement by, talc (steatite); esp. the act or process of hydrothermal alteration of ultrabasic rocks that results in the formation of a talcose rock (such as steatite, soapstone, or relatively pure concentrations of talc).
Industry:Mining
Introduction of, or replacement by, albite, usually replacing a more calcic plagioclase.
Industry:Mining
Introduction of, or replacement by, garnet. This process is commonly associated with contact metamorphism.
Industry:Mining
Introduction of, or replacement by, scapolite. Plagioclase is commonly so replaced. The replacement may involve introduction of chlorine.
Industry:Mining
