Lithogeochemistry of terrigenous associations of southern basins of the Cis-Ural trough. A.V. Maslov, G.A. Mizens, L.V. Badida, M.T. Krupenin, G.M. Vovna, V.I. Kiselev, Yu.L. Ronkin

Information is given on the lithogeochemical features of sandstones and clayey rocks composing the sedimentary sequences of the Yuryuzano-Sylvinskaya and Belskaya depressions of the Cis-Ural trough. It is shown that the chemical composition of sandstones corresponds to typical greywackes and Fe-sandstones. Comparison of variations in the content of the main rock-forming oxides in psammites of different stages of the Carboniferous and Permian revealed the existence of multidirectional trends and the asynchrony of a number of the brightest peaks, reflecting the specifics of the development of individual basins of the trough.