Bureau of Mines / Minerals yearbook: Area reports: domestic 1978-79
Year 1978-79, Volume 2 (1978-1979)
Krempasky, G. T.; Lawson, Don C.
Montana, pp. 315-327 ff. PDF (1.3 MB)
The Mineral Industry of Montana This chapter has been prepared under a Memorandum of Understanding between the Bureau of Mines, U.S. Department of the Interior, and the Montana Bureau of Mines and Geology for collecting information on all nonfuel minerals. By George T. Krempasky' and Don C. Lawson2 The value of nonfuel mineral production in Montana was $206 million in 1978 and $291 million in 1979. The accumulated value of produced metals — antimony, copper, iron ore, gold, lead, silver, tungsten, and zinc — accounted for 58% of the State's total nonfuel mineral production value in 1978. By comparison, the previous year's accumulated value of produced, metals accounted for 63% of the total. In 1979, the value of Montana's metal production increased nearly 58%, compared with that of 1978. The accumulated value of the State's production of nonmetals — barite, cement, clays, fluorspar, gem stones, gypsum, lime, peat, phosphate rock, pumice, sand and gravel, stone, talc, and vermiculite — accounted for 42% of the total nonfuel mineral production value in 1978. During the previous year, the accumulated value of nonmetals production was 37% of the total. In 1979, the value of nonmetal production increased more than 18%, compared with that of 1978. Compared with the value of other States' production, the value of Montana's production ranked in the top five in 1978-79 for the following commodities: vermiculite, talc, antimony, copper, and silver. Atlantic Richfield Co. (ARCO) reached a provisional settlement with the U.S. Federal Trade Commission that permitted ARCO to retain the Anaconda Co. The settlement required ARCO to divest itself of some of Anaconda's holdings; these were the Heddleston copper and molybdenum deposit near Lincoln, Mont., the Ann Mason and Bear ore deposits near Yerington, Nev., a 20% interest in Inspiration Copper Co., and a 50% interest in Anamax Mining Co. During 1979, Anaconda's copper smelter in Anaconda and the copper smelter of ASARCO Inc. in East Helena were shut down for 1 month for lack of feed. Montana's mineral processing plants continue to be dependent upon out-of-State sources for raw materials. The ASARCO smelter received over 90% of its feed from out-ofState, and more than 50% of the feed for the Anaconda Co.'s smelter and refinery at Great Falls came from out-of-State. Anaconda's aluminum plant in Columbia Falls received all of its alumina from outside the State, and the Stauffer Chemical Co.'s phosphate plant in Silver Bow County received all of its phosphate rock from Idaho. The Montana Department of State Lands issued a hard rock operating permit for ASARCO'S Troy project, an underground copper-silver mine with related ore processing facilities. The mine's life was estimated at 16 years, and ASARCO expected to produce 60,000 short tons of ore concentrates per year from the project. A total of 64 million short tons of ore containing 0.74% copper and 1.54 ounces of silver per ton had been delineated. Proposed Federal actions related to revising or abolishing the General Mining Act of 1872 have resulted in controversy, as have U.S. Forest Service Roadless Area Review and Evaluation (RARE II) studies, and U.S. 315
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