Tectonotypical cross section of the Korotaikha depression

The previous unbalanced models of tectonic structure of central part of Korotaikha depression are briefly reviewed. The author's interpretation of the seismic section РС15-20689 in the light of open access geological and geophysical materials have significantly changed the previous constructions. For the first time, a balanced geological and geophysical section confirmed by structural palinspastic reconstruction, was created, which was suggested as tectonotypical. The main zones of sole thrust in formation of the structure are: Korotaikha detachment (main regional sole thrust on plastic Upper Ordovician salt strata); Lower Permian flish floor and coal-bearing sediments of Kungurian Stage; Devonian evaporite layers in Labogeyskaya monocline. The structural palinspastic reconstruction of Paykhoides showed that the total horizontal compression of depression structures is about 60 km. Pay-Khoy antiformal stack full-duplex structural swell, distinguished under the allochthon of Pay-Khoy structural zone, was estimated as the most perspective potentially oil-and-gas bearing macrostructure of the depression.