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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 321

THE MINERAL INDUSTRY OF MONTANA 
321 
1977, 85% of that produced in 1978, and 
89% of that produced in 1979 was associated 
with ores from Anaconda's Berkley Pit 
operation in Butte. 
A total of 24 mines produced gold in Montana in 1977; 24 mines, including
three placer operations, produced in 1978; and 31 mines, one being a placer
mine, produced gold in 1979. Average gold production for the 1970-79 period
was 22,512 troy ounces annually, and its average annual value was $3 million.
Respectively, production in 1977, 1978, and 1979, was 99%, 87% and 107% of
the average. Value received for the commodity for 1977, 1978, and 1979, when
related to the average yearly value for the 10-year period, was 109%, 126%,
and 243%, respectively. Based on the value of its gold production, Montana
ranked seventh in 1978 and sixth in 1979 among the gold- 
producing States. Approximately 2% of the newly mined gold from U.S. mines
in 1978, and 3% in 1979, came from Montana. 
 A great interest was indicated in the use of heap-leaching for gold recovery.
Three companies were conducting research in the areas of Zortman-Landusky,
Elkhorn, and the Golden Sunlight. Conventional mills were being erected or
retrofitted near Sheridan, Lewistown, Virginia City, Philipsburg, and Basin.
Placer activities were underway near White Sulphur Springs, Alder Gulch,
Browns Gulch near Virginia City, in the Nine Mile area near Missoula, and
in Lewis and Clark County. However, only one property reported production.
 Iron.—R & S Iron Co. produced ore for direct shipping
to cement
manufacturers. Production decreased in 1978, compared with that of 1977,
and again in 1979, corn- 
Table 4.—Montana: Mine production (recoverable) of gold, silver,
copper,
lead, and zinc, by class of ore or other source material 
, 
Source 
Number 
of 
mines' 
Mat~ial 
r ~ 
(metric tons) 
Gold 
(troy 
ounces) 
Silver 
(troy 
ounces) 
Copper 
(metric 
tons) 
Lead 
(metric 
tons) 
Zinc 
(metric 
tons) 
1978 
Lode ore: 
Gold2                      
Gold-silver                  
Silver                     
 Total4                   Copper and lead-zinc5          
 Total4                   Other lode material: 
Copperprecipitates            
 Total lode material4          
Placer -- 
 Total4                    
1979 
Lode ore: 
Gold and gold-silver'  Silver                     
 Total4                   Copper, lead, and 
 lead-zinc'                 
 Total4                    
Other lode material: 
Goldtailings               Copperprecipitates           
 Total Lode material4        Placer                       
Grand total4  
6 
10 
8 
37,368 
5,113 
73,472 
1,200 
1,221 
544 
 640 
48,083 
587,726 
(3) 
5 
548 
1 
64 
59 
1 
37 
38 
23 
2 
115,953 
16,229,267 
2,965 
16,958 
636,449 
2,281,861 
554 
64,097 
124 
8 
76 
3 
25 
2 
16,345,220 
 3,867 
19.923 
~ 
2,918,310 
~ 
64,651 
2,675 
132 
79 
~ 
25 
3 
16,349,088 
—— 
19,923 
 44 
2,918,310 
7 
67,326 
—— 
132 
—— 
79 
—— 
28 
16,349,088 
19,967 
2,918,317 
67,326 
132 
79 
9 
10 
3,554 
70,812 
429 
2,007 
12,994 
567,405 
5 
596 
47 
31 
19 
31 
19 
13 
74,366 
15,544,915 
2,436 
21,600 
580,399 
2,721,462 
601 
62,240 
78 
179 
49 
55 
32 
1 
2 
15,619,282 
5 
11,852 
24,036 
 10 
3,301,861 
67 
~ 
62,841 
(3) 
7,013 
257 
(3) 
~ 
104 
~ 
33 
1 
15,631,139 
~ 
24,046 
 4 
3,301,928 
69,854 
258 
104 
34 
15,631,139 
24,050 
3,301,928 
69,854 
258 
104 
' Detail may not add to total because some mines produce more than one class
of material. ' Includes material that was leached. 
' Less than 1/2 unit. 
4Data may not add to totals shown because of independent rounding. 
' Combined to avoid disclosing company proprietary data. 


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