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Artificial weathering of uranium-nickel ore from Key Lake, Sask, Canada -. A contribution of uranium mineralogy to environmental protection

[Simulation of Weathering Processes of uranium-nickel ore from Key Lake, Sask, Canada -. A Contribution of Uranium Mineralogy to Environmental Protection]
von Pechmann, Edmund; Voultsidis, Vassilios

Journal of the Geological Society Volume 130 (1979), p. 513-526
Published: 01/01/1979

Abstract (German)
The effect of frost and rain stockpiled mounted uranium-nickel ore from the Key Lake deposits was studied in the laboratory. By frost damage occurs strong structure loosening and grain crushing of the rock. Sandsteinerzpartien have suffered much less than Myloniterzpartien. Uranium minerals were dissolved in the tests is minimal. The nickel minerals decompose rapidly into water-soluble secondary minerals (sulfates and arsenate). The effect of the weather conditions is dependent on the degree of comminution of the ore and its exposure to rain, frost and air.
Abstract
The impact of frost and rain on stockpiles of uranium-nickel ore from the Key Lake deposits has been investigated in simulation tests. Frost splitting causes strong disaggregation of the rock and fragmentation of the mineral grains. The ore is much less affected in the sandstone than in the mylonitized basement. During the tests, the uranium minerals have not been nearly weathered. The nickel minerals are quickly transformed into water soluble secondary minerals (sulphates and arsenate). The weathering effects on stored ore depend on the degree of comminution ore and its exposure to the atmospheric elements.
Keywords
Sandstone metasediments • • • mylonites para genesis • U • gersdorffite millerite • • • line nod rammelsbergite dump • • • subarctic zone frost effect precipitation • • • experiment environment pollution • Saskatchewan (Key Lake)