Abstract—
The geological and sedimentological interpretation of several time and deep seismic profiles within junction zone of the Volga‒Ural area of the East European Platform, Pre-Caspian Depression, Ural Foredeep, Bashkir Anticlinorium, and northern margin of the Scythian Platform allowed us to identify a number of previously unknown structural features of Later Precambrian and Early Paleozoic formation. On this basis, structural-facies maps were compiled for the Riphean and Vendian stages of development. It was shown that as a result of the collision of the southeastern passive margin of the continent Baltica with Scythia in the Early Vendian and with the Timanides of the Urals in the Later Vendian, a complex tectonic structure of the Orenburg tectonic node was formed, which forms the foundation of the Caspian oil and gas province. The results obtained substantially clarify the structure of the sedimentary cover of the East European Platform and the Pre-Caspian Basin, the stages of the formation and evolution of their structure, and the degree of influence on the sedimentation of structural changes in the adjacent territories of the folded Urals and the Scythian Platform.
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ACKNOWLEDGMENTS
The authors are grateful to the reviewers for constructive comments and to the editors for the preparation of the article.
Funding
The article was prepared in the framework of the works on the state contract (project no. 0135-2019-0071 entitled “Tectono-Sedimentation Systems: Structure and Evolution”; the scientific supervisor was Dr. N.P. Chamov).
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Reviewer: V.S. Parasyna
Translated by N. Astafiev
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Kheraskova, T.N., Volozh, Y.A., Antipov, M.P. et al. Features of the Structure and Development of the Southeastern Part of the East European Platform and the Caspian Basin in the Late Precambrian‒Early Paleozoic. Geotecton. 54, 628–651 (2020). https://doi.org/10.1134/S0016852120050052
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DOI: https://doi.org/10.1134/S0016852120050052