 | | Journal (issue) | | available). Arizona being the remarkably mineral-rich region that it is, we have not yet come close to describing...yielded hundreds of tons of wulfenite crystals as ore. And yet it is probably among the least visited by...recounted by Dowell (1978a, 1978b). The Total Wreck ore deposit was discovered in 1878 by John T. Dillon...levels, and miners began hauling out 50 tons of ore per day, which at first was stockpiled on the dump...mine opening to the mill, and a mule-drawn 5-ton ore car was brought in. In 1882 a massive steam-powered |  | | Book | | of debris washed down fromthe Roughton Gill mine dumps under Iron Crag C O N T E N INTRODUCTION...Elizabeth I to work copper and silver there. The smelter they built at Keswick was the largest in Europe...contributions on the topographical mineralogy of the region updating the earlier work of Greg & Lettsom (1858);...elsewhere in the Lake District, where the dominant ore minerals are sulphides of lead, copper and zinc,...antimonyin the Caldbeck Fells ores that the master smelter Joachim ve Gaunse referred to in 1581 as oneof |  | | Journal (issue) | | Behnke Northbrook, IL Werner Lieber Heidelberg, W. Germany Eric Offermann Arlesheim, Switzerland Jeffrey A...matrix, and in another occurrence with connellite, tyrolite and azurite on INTRODUCTION quartz. The mineral...cavity walls and is associated with connellite, tyrolite and azurite. CHEMICAL COMPOSITION Seven chemical...juanitaite-mixite-conichalcite or juanitaite-connellite-tyrolite-azurite, are attributed to unique local cation...ounces is extracted from over 15 million tons of ore. Average production is over 40,000 tons per day, |  | | Book | | large ilmenite masses could be seen on the old dumps. In 1975-1976, Brunet collected sharp, black, flattened...7 .5 cm in matrix of massive quartz from these dumps-adding that, in his judgment, many more "lost" localities...localities for good ilmenite crystals exist in the region (Brunet, I 977b ). NEW YORK Amity, Orange County...in Switzerland, it is only in the Maderanertal region of east-central Canton Uri that clefts bearing...clefts are found fairly commonly throughout this region, such that only a handful of notable finds during |  | | Book (edition) | | Society of Safety Engineers (ASSE) Association of Iron Ore Exporting Countries (AIOEC) Bituminous Coal Institute...distinguished by an Archimedes spiral, through which the ore is fed and discharged. Grinding is effected by flint...formation involving the separation and sinking of ore minerals below a silicate shell during the cooling...acid cure In uranium extraction, sulfation of moist ore before leaching. Pryor, 1 acid-dip survey A method...extraction of copper from oxide- or sulfide-bearing ore and dissolution of uranium from sandstone ores. Acid |  | | Book | | refractive indices. Many sulfides are very important ore 1ninerals. 4 Detailed Description of the Common...the secondary enrichment processes of hydrothermal ore deposits. Pyrite is rare in pegmatite veins. Gabbros...specularite as smaJl scales or flakes. Reniform (kidney ore) or botryoidal forms are common as dehydrated goeth...Bose, M. K. 1958. Goethite-bematite relation- an ore microscope observation. Amer. Mineral.. 43, 989....pyroxenes than ol ivines. Ilmenite is quite common in ore veins, where it appears most commonly with chalcopyrite |
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