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Bureau of Mines / Minerals yearbook: Metals, minerals, and fuels 1972
Year 1972, Volume 1 (1972)

Statistical summary,   pp. 83-121 ff. PDF (3.5 MB)


Page 83

  83Statistical Summary 
By Staff, Office of Technical Data Services—Mineral Supply 
 This chapter is a summarization of mineral production data for the United
States, its island possessions, the Canal Zone, and the Commonwealth of Puerto
Rico. Also included are tables that show the principal mineral commodities
exported from and imported into the United States, and that compare world
and U.S. mineral production. More detailed data are contained in the commodity
chapters of volume I and in the State chapters of volume II of this edition
of the Minerals Yearbook. 
 Mineral production may be measured at any of several stages of extraction
and processing. The stage of measurement used in this chapter is what is
normally termed "mine output." It usually refers to minerals or ores in the
form in which they are first extracted from the ground, but customarily includes
the product of aux 
iliary processing at or near the mines. 
 Because of inadequacies in the statistics available, some series deviate
from the foregoing definition. In the case of gold, silver, copper, lead,
zinc, and tin, the quantities are recorded on a mine basis (as the recoverable
content of ore sold or treated). However, the values assigned to these quantities
are based on the average selling price of refined metal, not the mine value.
Mercury is measured as recovered metal and valued at the average New York
price for the metal. 
 The weight or volume units shown are those customarily used in the- particular
industries producing the commodities. Values shown are in current dollars,
with no adjustment made to compensate for changes in the purchasing power
of the dollar. 
Table 1.—Value of mineral production 1 in the United States, by mineral
group 
(Millions) 
Year 
Mineral fuels 
Nonmetals 
(except fuels) 
Metals 
Total2 
1968                       
1969                       
1970                       
1971'                      
1972                       
$16,820 
17,965 
20,152 
21,247 
22,084 
$5,449 
5,624 
' 5,712 6,058 
6,492 
$2,698 
3,333 
8,928 
3,403 
3,641 
$24,966 
26,921 
' 29,792 
30,708 
32,217 
' Revised. 
 ' Production as measured by mine shipments, sales, or marketable production
(including consumption by producers). 
2 Data may not add to totals shown because of independent rounding. 


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