524 
MINERALS YEARBOOK, 1967 
 
Table 7.—Mine production of gold, silver, copper, lead, and zinc in
1967, by classes of ore or other source materials, in terms of recoverable
metals 
Source 
Number 
of 
Mines 1 
treated 
(short tons) 
Gold 
(troy 
ounces) 
Silver 
(troy 
ounces) 
Copper (short tons) 
Lead (short tons) 
Zinc 
(short 
tons) 
Lode ore: 
Gold             
Silver             
Copper            
Lead             
Lead-Silver        
Lead-Zinc         
Zinc              
Total           
Other bade material: 
Gold (slag and matte) Old tailings        
Total                
Total lode material 
Placer                
Totalallsources_.. 
7 
7 
8 
3 
1 
1 
1 
1,084,575 
1,460 
9,164,510 
149 
103 
 228,509 
904 
 405,379 
52 
 28,466 
9 
5 
141 
  
 4,860 
 7,781 
236,441 
 2,815 
 3,898 
307,841 
831 
1 
50,756 
(2) 
(2) 
13 
(2) 
6 
 
 15 
 13 
1,397 
 69 
6 
 
5 
 
2,807 
 217 
 
28 
10,480,210 
434,052 
564,467 
50,770 
1,500 
3,035 
 
(3) 
(3) 
12 
115 
695 
14 
1,144 
 15 
1 
 
(2) 
 
 
127 
709 
1,159 
1 
 
 
 
28 
5 
10,480,337 
(4) 
434,761 
232 
565,626 
129 
50,771 
1,500 
3,035 
 
33 
10,480,337 
434,993 
565,755 
50,771 
1,500 
3,035 
 1 Details will not necessarily add to totals shown, because some mines produce
more than one class of materiaL 
 2 Less than 3~ unit. 
 8 From property not classed as a mine. 
3,500 cubic yards. 
 
Table 8.—Mine production of gold, silver, copper, lead, and zinc in
1967, by types of 
material processed, and methods of recovery in terms of recoverable metals

T of t al ce ed 
and method of recovery 
Gold 
o~incL) 
Silver 
o~nc~) 
Copper 
Lead 
Zinc 
(shor~t 
Lode: 
 
 
 
 
 
Amalgamation and cyanidation: 
Ore                           
405,400 
7,229 
 
 
 
Old tailings                    
14 
15 
 
 
 
Concentration and smelting of 
concentrates: Ore                  
28,331 
544,452 
48,312 
1,400 
2,810 
Direct smelting: 
Ore                           
Slag and matte                  
 
 Total                      Placer                                
 
Grandtotal                      
321 
695 
12,786 
1,144 
2,458 
1 
100 
225 
 
434,761 
232 
565,626 
129 
50,771 
1,500 
3,035 
 
434,993 
565,755 
50,771 
1,500 
3,035 
 
Iron Ore.—Jackson Mountain Mining Co. closed its Humboldt County underground
iron mine in January, and Nevada Barth Corp. ceased all iron ore mining operations
in Pershing County at the end of March. As a result, production and shipments
of usable iron ore declined 36 percent below 1966 figures. Less than onethird
of the shipments were direct shipping grade ore, and all but 16 percent of
the total output was exported. Standard Slag Co., Douglas County, produced
concentrates for export in its Wabuska plant, 
Lyon County, while direct shipping grade ores were produced and shipped by
Nevada Barth Corp., Eureka and Pershing Counties and Nevada Iron Ore Co.,
Inc., Pershing County. 
 At Jean, Clark County, Geo. B. Smith Chemical Works, Inc., was building
an iron oxide pigment plant. In 1967, the plant ground iron ore from Utah
for the company's Maple Park, Ill., pigment plant and used the off-color
material to produce a soluble ferrous sulfate in a batch plant for the agriculture
industry. Eventually the