A new look at formation and the deep geological structure of the Pre-Caspian oil and gas basin based on a comprehensive analysis of geological and geophysical data

UDK: 553.98
DOI: 10.24887/0028-2448-2023-5-14-20
Key words: Pre-Caspian depression, mantle plume, triple-junction
Authors: E.A. Izmalkova (Gubkin University, RF, Moscow), K.O. Iskaziev (Meridian Petroleum LLP, the Republic of Kazakhstan, Almaty), B.M. Kuandykov (Meridian Petroleum LLP, the Republic of Kazakhstan, Almaty), K.I. Dantsova (Gubkin University, RF, Moscow), A.S. Monakova (Gubkin University, RF, Moscow), L.V. Miloserdova (Gubkin University, RF, Moscow), S.F. Khafizov (Gubkin University, RF, Moscow)

The observed situation with the multivariance of existing concepts of the Pre-Caspian depression formation is due to the fact that today there is no information on the material composition of the basement rocks in the Central Pre-Caspian Depression. Data about them have been obtained only on the basis of indirect methods (seismic data and gravimetry), also contribute to the ambiguous interpretation of the results of geophysical studies and a small number of deep wells, which also do not add the necessary critical mass to understand the entire geodynamic evolutionary path that its deep subsoil has gone through.

When analyzing the main concepts currently existing, it was found that the processes of eclogitization of the earth's crust and rifting were noted as the leading factors responsible for the formation of the Caspian structure. As a result, the failure of the processes of the first group and the second (with a wide manifestation of the processes of formation of the oceanic type of crust) was revealed, the concepts were also cut off by the time criterion, i.e. considering the formation of the structure in the post-Cambrian time.

Despite the plurality of opinions and the lack of a common opinion on the nature of the Pre-Caspian depression foundation, caused by the above reasons, the authors attempted to revise existing views based on information received in recent years. A critical analysis of the available materials and published literature on this topic was carried out, which makes it possible to speak more constructively about the possible evolution of the geostructure.

There are three stages in the formation of the Pre-Caspian: subduction-collisional (Early Proterozoic), aulacogenous (Late Proterozoic), thermal-relaxation associated with plume subsidence, cooling and formation of the structure of the basin (Early Paleozoic).


1. Antipov M.P., Bykadorov V.A., Volozh Yu.A., Leonov Yu.G., Problems of origin and evolution of Pre-Caspian depression (In Russ.), Geologiya nefti i gaza, 2009, no. 3, pp. 11–19.

2. Leonov Yu.G., Volozh Yu.A., Antipov M.P., Consolidate crust of Caspian region (In Russ.), Trudy Geologicheskogo instituta = Transactions of the Geological Institute, 2010, V. 593, 64 p.

3. Artyushkov E.V., Belyaev I.V., Kazanin G.S. et al., Formation mechanisms of ultradeep sedimentary basins: the North Barents basin. Petroleum potential implications (In Russ.), Geologiya i geofizika = Russian Geology and Geophysics, 2014, V. 55, no. 5–6, pp. 821–846, DOI:10.15372/GiG20140508

4. Dobretsov N.L., Polyanskiy O.P., On formation mechanisms of deep sedimentary basins: Is there enough evidence for eclogitization? (In Russ.), Geologiya i geofizika, 2010, V. 51, no. 12, pp. 1687–1696.

5. Volozh Yu.A., Nekrasov G.E., Antipov M.P. et al., Novyy vzglyad na formirovanie konsolidirovannoy kory Prikaspiyskoy neftegazonosnoy provintsii (A new look at the formation of the consolidated crust of the Caspian oil and gas province), In: Tektonika i geodinamika Zemnoy kory i mantii: fundamental’nye problemy-2022 (Tectonics and geodynamics of the Earth’s crust and mantle: fundamental problems-2022), Materials of the LIII Tectonic Meeting, Moscow: GEOS Publ., 2022, pp. 114–119.

6. Druzhinin V.S., Nachapkin N.I., Osipov V.Yu., To problem of tectonic zoning of crystalline crust of Pre-Caspian depression and environmental structures (Existing representations of depth structure and zoning) (In Russ.), Ural’skiy geofizicheskiy vestnik, 2019, no. 2, pp. 37-45, DOI: 10.25698/UGV.2019.2.4.37

7. Druzhinin V.S., Nachapkin N.I., Osipov V.Yu., Seismic-geo-density modeling - The basis for tectonic zoning of the crystalline crust Pre-Caspian depression and environmental structures (In Russ.), Ural’skiy geofizicheskiy vestnik, 2019, no. 4, pp. 21–34, DOI: 10.25698/UGV.2019.4.4.21

8. Kaz’min V.G., Bush V.A., Tikhonova N.F., Passivnaya okraina rifeyskogo okeana na yugo-vostoke Vostochno-Evropeyskoy plity: varianty rekonstruktsiy (Passive margin of the Riphean ocean in the southeast of the East European Plate: Reconstruction options), Proceedings of XVIII International Scientific Conference (School) on Marine Geology, 2009, pp. 233–235.

9. Krylov N.A., Avrov V.P., Golubeva Z.V., Geological model of sub-sart complex at Pre-Caspian depression and its oil and gas content (In Russ.), Geologiya nefti i gaza, 1994, V. 6, p. 32.

10. Orovetskiy Yu.P., On the problem of the genetic foundation of the ancient East European platform (In Russ.), Geofizicheskiy zhurnal, 2010, no. 3, pp. 106–111.

11. Tsvetkova T.A., Shumlyanskaya L.A., Bugaenko I.V., Zaets L.N., Seismotomography of the East-European and Barents-Pechora platforms: three-dimensional P-velocity model of the mantle under Volgo-Uralian, the Pre-Caspian depression and the Barents-Pechora platform (In Russ.), Geofizicheskiy zhurnal, 2010, no. 5, pp. 35-50.

12. Tsvetkova T.A., Bugaenko I.V., Zaets L.N., The main geodynamic border and seismic visualization of plumes under the East European platform (In Russ.), Geofizicheskiy zhurnal, 2019, no. 1, pp. 135-152, DOI: 10.24028/gzh.0203-3100.v41i1.2019.158868

13. Abilkhasimov Kh.B., Tectonic structure of the basement of the Caspian depression (In Russ.), Geologiya i okhrana nedr, 2012, no. 4, pp. 30–39.

14. Miletenko N.V., Fedorenko O.A., Atlas litologo-paleogeograficheskikh, strukturnykh, palinspasticheskikh i geoekologicheskikh kart Tsentral’noy Evrazii (Atlas of lithological-paleogeographic, structural, palinspastic and geoecological maps of Central Eurasia), Almaty: Publ. of Research Institute of Natural Resources YuGGEO, 2002, 26 p.

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