Abstract
Systems of silty sand-water and clayey rock-water were simulated under open-system conditions with respect to CO2 and oxygen at 25°C. It was shown that the dawsonite(+ quartz)+kaolinite assemblage at the Zaozernyi deposit was formed by interaction of terrigenous sediments with chloride-sodium solutions containing NaCl >100 g/kg H2O and saturated in carbonic acid (a partial pressure of CO2 > 0.5 bar). The modeling results do not confirm the possibility of dawsonite formation after primary bauxites (products of kaolinite weathering crusts), which is presumably related to the inconsistent formation parameters of these minerals during weathering of aluminosilciate rocks.
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Original Russian Text © O.A. Limantseva, A.A. Makhnach, B.N. Ryzhenko, E.V. Cherkasova, 2008, published in Geokhimiya, 2008, No. 1, pp. 69–83.
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Limantseva, O.A., Makhnach, A.A., Ryzhenko, B.N. et al. Formation of dawsonite mineralization at the Zaozernyi deposit, Belarus. Geochem. Int. 46, 62–76 (2008). https://doi.org/10.1134/S0016702908010059
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DOI: https://doi.org/10.1134/S0016702908010059