N.Yu. Nikulova (IG FRC Komi SC UB RAS)

GEOCHEMICAL CHARACTERISTICS OF THE TERRIGENOUS SEQUENCE AT THE BASE OF THE PALEOZOIC SECTION ON THE MANITANYRD RIDGE, THE POLAR URALS

Interpreting results of chemical analyzes and features of the distribution of rare and rare earth elements in the sediments of the Early Ordovician sandy-silty sequence at the base of the Paleozoic section of the Manitanyrd Ridge, the Polar Urals, made it possible to establish that the accumulation of the terrigenous sequence took place in epicontinental setting in moderately warm climate due to erosion and redeposition of mostly weakly weathered rocks of the Late Riphean-Vendian basement. It has been assumed that felsic igneous rocks related to the Cambrian pre-rift uplift and rifting were the main source of clastic material.
Keywords: sandstone, siltstone, chemical composition, clastic material, provenance areas, sedimentation setting, Manitanyrd Group, Polar Urals.