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DISTRIBUTION OF REE AND U IN THE WATER-ROCK SYSTEM USING THE EXAMPLE OF THE SKALINSKOYE MANIFESTATION OF RADON WATERS
D. A. Novikov 1,2, A. A. Maksimova 1,2, A. F. Sukhorukova 1,2, F. F. Dultsev 1, A. S. Derkachev 1,2, A. V. Chernykh 1, A. A. Khvashchevskaya 3
1 Trofimuk Institute of Petroleum Geology and Geophysics SB RAS, Novosibirsk, Russia; 2 Novosibirsk State University, Novosibirsk, Russia; 3 Engineering School of Natural Resources of the National Research Tomsk Polytechnic University, Tomsk, Russia
The paper presents data on geochemical features of the water-rock system of the Skalinskoye radon water manifestation. The waters of the Skalinskoye manifestation by chemical composition belong to the SO4-HCO3 Na-Mg-Ca type with a total mineralization value of 279–787 mg/dm3. The geochemical parameters of the medium correspond to the oxidizing environment with Eh +84,6…+187,0 mV, pH 6.9–8.8 and O2dissolved concentrations of 3.75–9.93 mg/dm3. Radon activity is up to 572 Bq/dm3. The water-bearing rocks are represented by biotite granites of normal and moderately alkaline series, which are permeated by quartz and sericite-quartz veins. With an increase in the total mineralization of radon waters, the prevailing forms of migration are calcium, magnesium, nickel and strontium bicarbonates, nickel carbonate and magnesium sulfate. Uranium migrates
mainly in the form of dissolved hydroxide U(OH)4(aq). According to saturation indices, all waters are saturated in relation to calcite, uraninite and amorphous uranium oxide.
Keywords: radon waters, radionuclides, REE, migration forms, granites, new manifestation of radon
waters Skalinskoye, West Siberia.
DOI 10.20403/2078-0575-2024-3-141-151