Specifics of the distribution of rare-earth and rare elements in the weathering crusts of the Nem and Zhezhimparma uplands at the Southern Timan

The article presents the results of the study of the distribution of rare earth and trace elements in the weathering crusts of the Southern Timan, differing in age and bedding conditions, in the Dzhezhim and Asyvvozh quarries on the Zhezhimparma Upland and in the Vadyavozh quarry on the Nem Upland. On the Zhezhimparma Upland, a similarity of the geochemical characteristics of sandstones and clayey rocks at the base of the Devonian section was obsered, confirming the tectonic origin of the clayey formations previously considered to be the weathering crust. In the Vadyavozh quarry, a geochemical analysis was conducted on Mesozoic-Cenozoic areal and linear weathering crusts developed over basement rocks. The study confirmed a genetic link between the micaceous aleurolites of the Upper Riphean Dzhezhim suite and the Riphean weathering crust formation.