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Bureau of Mines / Minerals yearbook area reports: domestic 1978-79
Year 1978-79, Volume 2 (1978-1979)

Krempasky, G. T.; Lawson, Don C.
Montana,   pp. 315-327 ff. PDF (1.3 MB)


Page 323

 THE MINERAL INDUSTRY OF MONTANA 323 
Table 6.—Montana: Mine production (recoverable) of gold, silver,
copper, lead, and zinc, by type of material processed 
and method of recovery 
 Type of material processed and method 
 of recovery 
 Gold (troy ounces) 
Silver 
(troy 
ounces) 
Copper 
(metric 
tons) 
Lead 
(metric 
tons) 
 Zinc (metric tons) 
1978 
Lode: 
Cyanidation..                          
Smelting of concentrates from ore           
 Total                            
Direct smelting of: 
 Ore                               
 822 
17,949 
806 
2,298,719 
64,098 
6 
—— 4 
18,771 
2,299,525 
64,098 
6 
4 
1,152 
618,785 
552 
125 
75 
Precipitates                         
 TotaP                            
 Totallode                        Placer                                
 Grand total                        
1979 
2,675 
1,152 
618,785 
3,228 
125 
75 
19,923 
44 
2,918,310 
 7 
67,326 
—— 
132 
—— 
79 
—— 
19,967 
2,918,317 
67,326 
132 
79 
Lode: 
Amalgamation, cyanidation, and 
smelting of concentrates from ore2         
Direct smelting of: 
Ore                               
Precipitates                         
Total1                            
Totallode1                        
21,613 
2,700,625 
62,130 
37 
2 
2,433 
~ 
601,303 
710 
7,013 
221 
103 
2,433 
601,303 
7,724 
221 
103 
24,046 
3,301,928 
69,854 
258 
104 
Placer                                 
 Grandtotal                        
4 
24,050 
3,301,928 
69,854 
258 
104 
1Data may not add to totals shown because of independent rounding. 
2Combined to avoid disclosing company proprietary data. 
Table 7.—Montana: Mine production (recoverable) of gold, silver,
copper,
lead, and zinc in Silver Bow County 
Material sold 
  M Gold   SilverYear pg ounc~s) troy ounces) 
 1975 6 17,499 13,528 2,162 1976 2 15,244 19,845 2,937 1977 1 14,054 21,181
3,081 1978 1 11,233 16,949 2,281 1979 1 15,545 21,336 2,655 
 1882-1979 —— 1500,929 2,654,943 678,674 
 Copper Lead Zinc To~ value 
 (metric (metric (metric th ds 
 tons) tons) . tons) OIssan 
 1975 79,766 11 4 $124,647 1976 82,471 3 1 141,810 1977 77,942 ——
—— 132,163 1978 66,741 —— ——
113,446
1979 69,133 —— —— 177800 
 1882-1979 8,539,048 415,442 2,406,823 5,646,866 
1Complete data not available for 1882-1904. 


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