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

Lockard, D. W.; Schilling, John H.
Nevada,   pp. 337-349 ff. PDF (1.4 MB)


Page 347

Table 9.—Nevada: Mine production (recoverable) of gold, silver,
copper,
lead, and zinc, 
by type of material processed and method of recovery 
347 
"~ of material rocessed 
and method of r~cov 
cry 
Gold 
(troy 
ounces) 
Silver 
(troy 
ounces) 
Copper 
(metric 
tons) 
Lead 
(metric 
tons) 
Zinc 
(metric 
tons) 
1978 
; 
Lode: 
Cyanidation                                    
Smeltingofconcentrates                           
Leaching                                      
228,956 
32,775 
(1) 
432,295 
368,923 
(1) 
10,305 
7,301 
653 
1,371 
 Direct smelting of: 
Ore                                        
Copper precipitates                             
 Totallodematerial4                          Placer                     
 Grandtotal                                 
1979 
21M 
22,669 
135 
2,713 
1 
(3) 
260,895 
W 
803,887 
w 
20,453 
—— 
653 
1,371 
—— 
260,895 
803,887 
20,453 
653 
1,371 
Lode: 
Cyanidation                                    
Smeltingofconcentrates                           
Leaching                                      
199,857 
22 
(1) 
520,885 
 3,693 
(1) 
w w 
1 
W 
Direct smelting of: 
 Ore                                        
69 
4,040 
w 
23 
W 
Copper precipitates                            Total lode material      
w 
199,948 
528,588 
w 
24 
W 
Placer                                          
 Grandtotal                                 
12 
—— 
199,960 
528,588 
w 
24 
W 
 w withheld to avoid disclosing company proprietary data; included with direct
smelting of ore in 1978; excluded from totals in 1979. 
 1lncluded in cyanidation. 
 2lncludes small quantity of material recovered from placer. 
 3Less than 1/2 unit. 
 4Data may not add to totals shown because ~f ~ rounding. 
 THE MINERAL INDUSTRY OF NEVADA 
primary silver production. Silver King Mines secured necessary permits to
start a 1,200-ton-per-day open pit operation in the Taylor mining district
near Ely; estimated production is 1.0 to 1.5 million ounces of silver per
year. Candelaria Partners, a limited partnership between Occidental Minerals
Corp. and Congon and Carey of Denver, Cob., announced plans in late 1979
to begin an 8000-ton-per-day open pit operation at the historic Candelaria
mining camp, Mineral County. Total project cost is estimated to be $25 to
$30 million. 
 Houston Oil and Minerals began stockpiling ore from the Con-Imperial Mine,
Lyon County. Mill production will start in 1980. 
 Bar Resources, Ltd., (Canada) brought their Buckhorn project into production
(November 1979) in record time—S months. The Buckhorn, a 500-ton-per-day
open pit gold-silver operation in Eureka County, should produce 14 to 16,000
ounces of gold, and 140 to 180,000 ounces of silver per year. 
 Tungsten.—Active tungsten producers in Nevada numbered 26 in 1978
and fell to 20 in 1979. The State's largest producer, Union Carbide's Emerson
Mine in Lincoln County, accounted for a large proportion of total output.
All concentrates were shipped to either Union Carbide's Pine Creek ammonium
paratungstate plant, Bishop, Calif., or the tungsten carbide plant of Kennemetal,
Inc., in Churchill County. 
 In late 1979, Utah International announced plans to open the Springer Tungsten
Mine, Pershing County. A plant will be constructed at the mine site for conversion
of concentrate to ammonium paratungstate at the rate of 1.6 million pounds
of contained tungsten per year; proposed operational date is 1982. 
 Nevada ranked third in the Nation in 1979 in tungsten production. 
 Zinc.—Production fell somewhat in 1978, compared with that of
1977,
and decreased to almost nothing in 1979. This reduction 


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