564 
MINERALS YEARBOOK, 1967 
 
Table 1O.~—Mine production of gold, silver, copper, lead, and zinc
in 1967, by class of ore or 
other source materials, in terms of recoverable metals 
 Num-Source ber of mines 1 
Material 
sold or 
treated 
(short 
tons) 
Gold (troy 
ounces) 
Silver (troy ounces) 
 Copper (pounds) 
 Lead (pounds) 
 Zinc 
(pounds) 
Lode ore: 
 Dry gold-silver 4 Dry silver 3 
 Total 7 
 Copper 7 Copper-zinc and lead-  zinc2 4 Lead 1 Zinc 5 
 Total 17 
 
Other lode material: Copper 
 precipitates 1Placer 2 
 Total all sources 26 
37,343 
 472 
2,066 
  
24,189 
24 
1,559,900 
14,400 
200 
600 
4,100 
 
37,815 
2,066 
24,213 
1,574,300 
800 
4,100 
 
4,452,994 
 
44,042 
5 
272,058 
2,314 
 
 226 
  
575 
47,354 
10,938 
12 
74,978 
61,084,800 
 1,417,400 
  
730,000 
100 
 
 167,600 
300 
3,485,200 
 668,000 
 
 992,600 
 
41,095,300 
 
4,769,099 
3,115 
133,282 
63,232,200 
3,653,200 
42,755,900 
 
51,112 
  
7 
 
85,209,500 
 
 
 
4,858,026 
5,188 
157,495 
150,016,000 
3,654,000 
42,760,000 
 1 Detail will not necessarily add to total because some mines produce more
than one class of material. 
 2 Combined to avoid disclosing individual company confidential data. 
 ' Operations at plants leaching runoff water not counted as producing mines.

 
Table 11.—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: 
Concentration and smelting of concentrates: 
Ore 3,115 132,669 63,178,400 3,653,100 42,755,900 
 
Direct Smelting: 
 Ore 2,066 24,826 1,622,400 900 4,100 
 Copper precipitates                                85,209,500____________________

 Total 2.066 24,826 86,831,900 900 4,100 
Leachingofcopperore   5,700 
Placer  7 
 Grand total 5,188 157,495 150,016,000 3,654,000 42,760,000 
 
At the Kennecott Chino operation production was stopped at the open pit mine;
leaching, however, was continued at the mine dumps with supervisory personnel
operating the precipitation plant. Copper precipitates were stockpiled pending
settlement of the strike. On December 4, the duration of the strike at the
Chino mine equaled that of the record 1959 strike, which lasted 143 days.
Construction on contracted projects was continued. Completed was a new 626-foot-high
smelter stack that was to supplement the old 500-foot stack. Improvements
in the copper precipitation section and the installation, at the converters,
of oxygen 
equipment for direct smelting were additional projects undertaken. A total
of 5 billion pounds of copper had been produced from the mine as of January
1967. An estimated 250 million tons of ore and almost twice as much waste
were mined to obtain the product. 
 Development continued at the Tyrone mine of Phelps Dodge Corp., 10 miles
southwest of Silver City in Grant County. Initial stripping of overburden,
begun in April at the $100 million open pit copper mine project, was about
25 percent completed at yearend. Although some ore was uncovered and stockpiled,
regular production was not expected to begin before