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 
 
  Material Num- sold orSource ber of treated mines 1  (short   tons) 
Gold Silver 
(troy (troy 
ounces) ounces) 
Copper 
(pounds) 
Lead 
(pounds) 
Zinc 
(pounds) 
Lode ore: 
Dry gold and dry gold- 
 silver' 37 3,520 
 Dry silver 6 150,478 
 Total 13 153,998 
 Copper 2 2,309 Copper-lead-zinc 1 437,700 Lead 6 1,297 Lead-zinc and zinc'.~.
~18 577,437 
 Total 26 1,018~743 
 
Other lode material: 
 Lead cleanup (5) 5 
 Zinc cleanup (5) 147 
 Total 152 
 
Total lode materiaL 391,172,893 
Placer                  15          
 Total all sources. 54 1,172,893 
 827 8,221 5 32,522 
2,500 
5,500 
10,800 
167,600 
12,300 
71,300 
 
 832 40,743 
8,000 
178,400 
83,600 
 
 197 45,608 14,657 901,706 144 6,087 2,911 822,553 
193,000 
5,895,100 
7,900 
1,879,300 
10,000 
19,307,900 
230,000 
24,105,600 
31,466,600 
25,100 
73,195,300 
 
17,909 1,775,954 
7,975,300 
43,653,500 
104,687,000 
 
 19 
 3 654 
200 
2,500 
5,000 
9,100 
113,400 
 
3 673 
2,700 
14,100 
113,400 
 
 18,744 1,817,370 2,437 329 
7,986,000 
43,846,000 
104,884,000 
 
21,181 1,817,699 
7,986,000 
43,846,000 
104,884,000 
1 Detail will not necessarily add to totals, because some mines produce more
than one class of material. 
2 Combined to avoid disclosing individual company confidential data. 
' Six dry gold mines and one dry gold-silver mine. 
 4 lead-zinc mines and one zinc mine. 
From properties not classed as mines. 
 
 
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 
 
Type of material processed 
and method of recovery 
Gold 
(troy 
ounces) 
Silver 
(troy 
ounces) 
Copper 
(pounds) 
Lead 
(pounds) 
Zinc 
(pounds) 
Lode: 
Amalgamation: ore                Concentration, and smelting of concentrates:
ore                      
 
Direct-smelting: 
Ore                         
Cleanup                      
 
 Total                     Placer                              
 
Grand total                     
2,380 
 
15,667 
838 
 
1,764,849 
7,788,100 
43,732,800 
104,759,300 
 
694 
3 
51,010 
673 
195,200 
2,700 
99,100 
14,100 
11,300 
113,400 
 
697 
2,437 
51,683 
— 329 
197,900 
113,200 
124,700 
 
 
21,1811,817,699 
7,986,000 
 
43,846,000104,884,000 
THE MINERAL INDUSTRY OF COLORADO 
189 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
ounces. Output was reported from 34 lode and 15 placer mines in ' 22 counties,
compared with 43 and 14, respectively, in the same number of counties in
1966. The lode mines accounted for 18,744 troy ounces or 88 percent of the
State output, and placer mines, 2,437 troy ounces or 12 percent in 1967.
Eight of the placer mines were sand and gravel operations at which gold was
recovered as a byproduct. Chaffee, Fresnont, and Pitkin Counties 
were credited with gold production in 1967, whereas they had none last year;
Lake, Montrose, and Saguache Counties had production last year but not in
1967. San Miguel County—57.5 percent of the State output—was
the only county with output greater than 10,000 troy ounces. However, yield
from this county was about 8,000 ounces less than in 1966. Ouray County,
the second most productive county, also had a significant decline in produc