- 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 ...                             
                                                     
                        Obsolete method of winning coal or bedded iron from shallow deposits, in which mineral was extracted and dragged to a central shaft.    
    
    						Industry:Mining    
									Obtained by the distillation of coal tar. Used in the manufacture of dyestuffs.    
    
    						Industry:Mining    
									Occurring as needles or plates intersecting in a gridlike or grill-like manner. Compare: acicular    
    
    						Industry:Mining    
									Occurs native, alloyed with gold as electrum, as sulfide argentite, Ag<sub>2</sub>S , proustite, pyrargyrite, and horn silver, AgCl, or cerargyrite. Main source is argentiferous ores of lead, zinc, and copper where it is extracted as a byproduct. Bulk of production is used for coinage, electrical alloys, photographic chemicals, and the arts.    
    
    						Industry:Mining