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)
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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