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A gold, uranium and thorium deportment analysis of Witwatersrand ore from Cooke section, Rand Uranium Randfontein05 November 2012 (has links)
M.Sc. / Please refer to full text to view abstract
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The development and some practical applications of a statistical value distribution theory for the Witwatersrand auriferous depositsRoss, F. W. J. January 2015 (has links)
No description available.
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ORE-WASTE SELECTION UTILIZING GEOSTATISTICS (ARIZONA)Rojas, Ricardo Vicente, 1951- January 1986 (has links)
No description available.
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Optimum depletion of exhaustible resources with particular reference to miningMaleas, Alexander. January 1983 (has links)
No description available.
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Optimum depletion of exhaustible resources with particular reference to miningMaleas, Alexander. January 1983 (has links)
No description available.
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Pyrite porphyroblast paragenesis at the Cherokee Mine, Ducktown, TennesseeBrooker, Donald Duane January 1984 (has links)
Pyrite porphyroblasts up to 300 mm in size are common in the polymetamorphosed, iron-rich, stratabound, massive sulfide ore at the Cherokee Mine, Ducktown, Tennessee. These porphyroblasts contain abundant inclusions of sphalerite, calcite, and micas that are used to determine the paragenesis of the porphyroblasts and the metamorphic history of the ore deposit. The ore mineralogy at the mine is: hexagonal pyrrhotite (60%), pyrite (30%), chalcopyrite (4%), sphalerite (3 %), and magnetite (3 %) with minor galena, molybdenum, tetrahedrite, bismuth, ilmenite, and rutile. The ore body is interpreted to have been syngenetic and to have contained both primary pyrrhotite and primary pyrite: additional pyrite may have formed as crusty accretions resulting from oxidation of primary pyrrhotite shortly after deposition. The early pyrites were later deformed and acted as seeds for the formation of the larger porphyroblasts by Ostwald ripening, and by the annealing of small pyrite grains into larger porphyroblasts, during isochemical metamorphism. Sphalerite geobarometry indicates initial growth of the pyrite porphyroblasts began at 6.8± 0.8 kilobars and that many sphalerite grains underwent some degree of re-equilibration at a later stage. Fluid inclusions formed during retrograde metamorphism have salinities near 12 % NaCl with a vapor phase rich in CO₂. Pyrrhotite-pyrite compositional profiles indicate at least partial re-equilibration of hexagonal pyrrhotite down to about 270°C. At lower temperatures further compositional re-equilibration was probably prevented, because the coexisting pyrite was too refractory to release the sulfur needed for the hexagonal pyrrhotite to react to monoclinic pyrrhotite. / Master of Science
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Use of geostatistics in developing drilling programs at the Cananea copper mineCervantes-Montoya, Jesús Alberto January 1981 (has links)
No description available.
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Geology and ore reserve estimation of the Witwatersrand-type gold deposits with specific reference to the Welkom GoldfieldAinslie, L C January 1981 (has links)
No description available.
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