SOSVA-LOZVA GRABEN – THE DEVONIAN-CARBONIFEROUS STRUCTURE OF EXTENSION IN THE REAR OF AN ACTIVE CONTINENTAL MARGIN ON THE EASTERN SLOPE OF THE NORTHERN URALS

Within the northern part of the Tagil paleo-island-arc structure in the Northern Urals, the Sosva-Lozva graben is identified. The graben is filled mainly with terrigenous and volcanic strata of the Devonian and Lower Carboniferous. The location of the graben to the west (in modern coordinates) of the supra-subduction magmatic complexes and the composition of volcanic rocks, which combines signs of igneous formations of convergent and divergent settings, suggest that this structure formed under extensional conditions in the rear of the active continental margin.