 | | Journal (article/letter/editorial) | | variety of metals up to the present. The earliest mining efforts on North American representatives were...refining. Present-day mining is restricted to a number of deposits in USA, Canada, Sweden and Norway, a...deposit of the US is unique in that the recent mining (post-1950 to its closing in 1987) was primarily...Stratabound Sulphides" resuited in the publication of a series of compilations of the stratabound sulfide deposits...and the U K (Johnstone and Gallagher, 1980a,b), Canada (McAllister et al., 1980; Sangster, 1980), United |  | | Journal (article/letter/editorial) | | class, of equal size, with arsenic minerals. Tennantite-group minerals are the most frequently observed...promote the deposition of arsenic sulfosalts. Tennantite is a stable phase at low temperatures and low...are sufficiently high to allow precipitation of tennantite at appropriate configurations of other variables...ideal case, to assist in the planning of selective mining. Introduction T H E ECONOMIC GEOLOGY of polluting...processes operate. Environmental standards for the mining and smelting industries, however, are being improved |  | | Journal (issue) | | Ann Arbor, Ml Andrew C. Roberts Geol. Surv. of Canada Ottawa George W. Robinson Seaman Mineral Museum...Volume Thirty, Number Five Articles The Mex-Tex mine, Bingham, N ew M exico.......................................................... 395 Abstracts of new mineral descriptions...............................Van Pelt. Long thought to be from the "Sapucaia mine," this speci men and others (representing the first...quartz crystals) actually came from the Berilo Branco mine. See the article beginning on page 361.___________ |
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