Mihalchenko I.I.¹, Andreev O.V.², Zagorodniy V.V.², Zaiats O.V.¹
1 – M.P. Semenenko Institute of Geochemistry, Mineralogy and Ore Formation of the National Academy of Sciences of Ukraine
2 – Taras Shevchenko National University of Kyiv, Educational-Research Institute «Institute of Geology»
Language: Ukrainian
Geochemistry and ore formation 2016, 37: 86-99
https://doi.org/10.15407/gof.2016.37.086
Purpose. The aim of the paper is the modeling migration of chemical elements during formation of thorium-uranium ore-bearing albitites of the Novooleksiivka ore deposit, Central-Ukrainian uranium ore-bearing district of Ukrainian Shield. Methodology is based on collection of data from early and modern geological investigations, geological and radiometric documentation of drill cores, sampling and statistical calculations. Mass fraction’s of chemical elements in the samples of rocks was determined by XRF-method in the laboratory of educational-research institute “Institute of geology” of Taras Shevchenko National University of Kyiv . Conclusion of inputs (removal) and deposition (leaching) made on the basis of comparison of the estimation of average mass fraction of the corresponding chemical element with the source rock and the estimation of the Clark of this element. Results. During the main stage of hydrothermal-metasomatic formation of alkaline sodium metasomatites in the volume of the crust, which is now occupied by albitites, fluids were leached and removal K, Rb, Ba, Cu, Si, Pb, and accordingly , were supplied and deposited Na, Ca, Mg, P (?), Ga, Y (?), Th U. During the final (ore) stage of rock formation was introduced and retained U, Th, Ti, Ca, Nb, Fe, Y, Mg, Mn, Ga, Rb, Ba, K, while modeled main masses of U, Th, Ti, Ca, Fe were deposited in cavities of various origin. In the formation of uranium-ore albitites Novooleksiivka ore deposit did not happen inputs and deposition Sr and Zr (unlike Dokuchaevka and Novokosnyantynivka uranium ore deposits), La, Ce.
Keywords: chemical element, migration, clark, concentration, albitite, Novooleksiivka ore deposit.
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