Page 263

  263The Mineral Industry of 
Michigan 
This chapter has been prepared under a Memorandum of Understanding between
the Bureau of Mines, U.S. Department of the Interior, and the Geological
Survey Division, Michigan Department of Natural Resources, for collecting
information on all nonfuel minerals. 
By James J. Huh and L. J. Prosser, Jr.2 
The value of nonfuel mineral production in Michigan was $1.4 billion in 1978
and $1.5 billion in 1979. Leading nonfuel mineral commodities, in terms of
value, were iron ore, portland cement, sand and gravel, magnesium compounds,
and stone. Iron ore production, in the decade of the 1970's, accounted for
about 33% of the State's total 
nonfuel mineral value. During 1978 and 1979, Michigan was the Nation's leading
producer of calcium chloride, crude gypsum, magnesium compounds, and peat.
Other nonfuel mineral commodities produced were bromine, clay, copper, iodine,
lime, masonry cement, salt, silver, and sulfur. 
Table 1.—Non 
fuel mineral produ 
ction in Michigan' 
1977 
1978 
1979 
Mineral 
Value 
Quantity (thousands) 
Value 
Quantity (thousands) 
Quantity 
Value 
(thou 
sands) 
Cement: 
Masonry — — — thousand short tons_ —
 Portland do_~ 
Clays do_~ 
Copper (recoverable content of ores, etc.) 
 metric tons - 
Gemstones                      
Gypsum thousand short tons_ — Iron ore (usable), thousand long
tons
 gross weighL — Lime         thousand short tons.. —
Peat   
                do~_ 
Salt                     do..~ 
Sandandgravel            do._~ 
Silver (recoverable content of ores, etc.) thousand troy ounces - 
Stone: 
Crushed — - - - thousand short tons - 
 Dimension do.... 
Combined value of bromine, calcium chloride, iodine, magnesium compounds,
and values indicated by symbol W.        
Tote!                      
 246 $9,761 5,582 166,803 2,007 5,126 
 38,442 56,613 NA 12 1,924 8,778 
 12,009 356,227 1,347 42,015 226 3,917 3,939 78,808 46,486 101,542 
 335 1,550 
 40,517 84,971 8 147 
 XX 138,626 
 294 $13,621 5,916 211,786 2,122 6,993 
 W W NA 10 2,765 15,526 
 17,538 556,954 1,291 45,814 220 3,851 3,741 83,872 48,260 107,600 ~ W W
 40,129 90,981 8 155 
 XX 222,427 
262 
5,682 
*2,072 
w 
NA 
2,526 
17,196 
1,057 
258 
3,080 
50,169 
W 
39,809 
9 
XX 
$16,455 
252,058 
 7,430 
W 
10 
14,633 
596,478 
43,373 
 4,847 
82,540 
116,597 
W 
99,832 
166 
272,057 
XX 1,054,896 
XX 1,359,590 
XX 
1,506,476 
 NA Not available. W Withheld to avoid disclosing company proprietary dkta;
value included in "Combined value" figure. XX Not applicable. 
 ' Production as measured by mine shipments, sales, or marketable production
(including consumption by producers).