MINERALS YEARBOOK, 1967 
782 
 
 
 
 
 
 
 
 
 
 
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Figure 1.—Value of copper, and total value of mineral production in
Utah. 
 
tons was waste or leach material. Of the 37.2 million tons of valuable material
produced, metals accounted for 23.9 million tons and nonmetals for 13.3 million.

 Kennecott Copper Corp. employees were on strike from mid-July to beyond
yearend. This contributed to a 29-percent decrease in the output value of
the metals group. Copper, gold, lead, silver, and zinc had a combined value
of $171.1 million, $76.5 million less than in 1966. 
Copper amounted to only 36 percent of the total value of mineral production,
compared with 43 percent in 1966. All metals except uranium and vanadium
had losses. 
 Despite a strong gain in potassium salts, the nonmetal group decreased 11
percent in value. Declines were recorded in nine out of the 16 nonmetals
produced. 
 Coal production value was down 10 percent. Losses in output value were also
recorded in asphalt (gilsonite), carbon dioxide, natural gas, and petroleum
for