Bureau of Mines / Minerals yearbook: Metals, minerals, and fuels 1972
Year 1972, Volume 1 (1972)
Mica, pp. 783-791 ff. PDF (752.3 KB)
783Mica By Benjamin Petkof' Scrap and flake mica production reached the highest output ever recorded in the United States during 1972. Only a minor quantity of low-quality sheet mica was produced during the year in only one State. Ground mica production increased in both quantity and value. All exports of mica dedined in quantity but increased in value. Imports of unprocessed and processed sheet increased, and scrap imports declined. The domestic consumption of all forms of sheet mica varied little from that of the previous year. Table 1.—Salient mica statistics 1968 1969 1970 1971 1972 United States: Sold or used by producers: Sheet mica thousand pound& - Value thousands. - Scrap and flake micathousand short tons. - Value thousands... Ground mica thousand short tons... 15 W 125 $3,014 111 W $3 133 $2,893 125 - - - - 119 $2,527 115 17 $7 127 $2,917 120 14 $7 160 $4,353 - 128 Value thousands... $7,072 $8,058 $7,350 $8,280 $8,844 Consumption, block and film thousand pounds... Value thousands. - Consumption, splittings - thousand pounds... Value thousands. Exports thousand short tons. Imports for consumption do -- - World: Production thousand pounds.. 1,628 $2,591 4,785 $2,010 14 5 346,513 1,498 $2,595 5,077 $2,196 6 5 367,635 1,299 $2,058 5,214 $2,254 9 6 360,768 1,301 $2,259 4,177 $1,818 8 7 375,554 1,207 $2,026 4,324 $1,771 7 5 440,016 W Withheld to avoid disclosing individual compan y confidential data. DOMESTIC PRODUCTION Sheet Mica.—Slightly over 7 short tons of sheet mica, valued at $7,000, was produced in Colorado during 1972. The production consisted of low-value punch and circle mica. The outlook for any large future production of any quality of sheet mica remained small. Scrap and Flake Mica.—The production of scrap and flake mica reached an alltime high of 159,536 short tons valued at $4,353,313. This was an increase of 26% in quantity and 49% in value. North Carolina was the major scrap and flake producing State with almost 57% of total production. The remaining output came from Alabama, Arizona, Connecticut, Georgia, New Mexico, Pennsylvania, South Dakota, and South Carolina. Flake mica was obtained primarily by the beneficiation of material from pegmatite and kaolin deposits. The domestic output of scrap and flake was processed to small particle size mica for various industrial end uses. Ground Mica.—Sales of ground mica increased 7% in both quantity and value over those of 1971. Dry-ground mica accounted for 80% of total sales. Sixteen companies, operating a total of 20 plants, processed scrap and flake to a small particle size; of these plants, 14 produced dryground mica; 3, wet-ground; and 3, both wet- and dry-ground. 1 Physical scientist, Division of Nonmetallic Minerals.
http://rightsstatements.org/vocab/NoC-US/1.0/| As a work of the United States government, this material is in the public domain.| For information on re-use see: http://digital.library.wisc.edu/1711.dl/Copyright