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)
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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