The Western Kuban trough, the water area of the Azov and the Eastern Black Seas are still among the few underexplored hydrocarbon basins. Their oil and gas potential is directly due to the properties of the sedimentary strata that fill them, which are controlled by the sources of drift: quartz-rich sands and sandstones are good oil reservoirs, and clay strata are oil source complexes. Despite the long history of geological and geophysical studies of the Northern Black Sea region and the abundance of factual material accumulated in this region, there are still significant gaps in understanding the mechanism and history of basin filling and their Cenozoic geodynamic evolution. In particular, the issue of demolition source for strata of different ages has not been resolved. The demolition source for sands and sandstones could only be the complexes of the East European Platform, i.e. for the formation of high-quality oil reservoirs in the indicated basins, sedimentation flows into these basins from the north, and not from the south (regions of the modern Caucasus), are favorable. The article presents an analysis of existing ideas about the tectonic nature of the Western Kuban trough and paleogeographic reconstructions of the Northern Black Sea region using seismostratigraphic profiles and the results of U-Pb dating of detrital zircon grains (dZr) from sedimentary sequences. Highly detailed seismic records for the Western Ciscaucasia show that the flow of clastic material towards the western part of the modern mountain structure of the Greater Caucasus from the north continued until the end of the Miocene. That is, there is currently no seismostratigraphic evidence for the existence of a mountain structure in the western part of the modern Greater Caucasus up to the beginning of the Pliocene, and the uplift of this orogen in its western segment began no earlier than the Late Miocene. The existing data of U-Pb dating of dZr from the sequences of the Northern Black Sea region of different ages also did not reveal any signs of the input of erosion products from the Caucasus into the Western Kuban trough. For most of its existence, the Ciscaucasian trough had a marginal continental (“pericratonic”) nature and was filled mainly with sedimentary flows from the East European Platform. Its transformation into a foothill sedimentary basin occurred no earlier than the Pliocene. Revision of the basic ideas about the method of filling and geodynamic evolution of the Ciscaucasian trough will inevitably lead to the correction of numerical models of generation-accumulation hydrocarbon systems of the Western Kuban trough.
References
1. Gusev G.S., Mezhelovskiy N.V., Gushchin A.V. et al., Tektonicheskiy kodeks Rossii (Tectonic Code of Russia), Moscow: GEOKART: GEOS Publ., 2016, 240 p.
2. Arkhangel’skiy A.D., Usloviya obrazovaniya nefti na Severnom Kavkaze (Conditions for oil formation in the North Caucasus), Moscow – Leningrad: Scientific Publishing Bureau of the Oil Industry Council, 1927, 186 p.
3. Kerimov V.Yu., Yandarbiev N.Sh., Mustaev R.N., Kudryashov A.A., Hydrocarbon systems of the Crimean-Caucasian segment of the Alpine folded system (In Russ.), Georesursy = Georesources, V. 23(4), pp. 21–33, DOI: https://doi.org/10.18599/grs.2021.4.3
4. Nikishin A.M., Wannier M., Alekseev A.S. et al., Mesozoic to recent geological history of southern Crimea and the Eastern Black Sea region, In: Tectonic Evolution of the Eastern Black Sea and Caucasus: edited by Sosson M., Stephenson R.A., Adamia S.A., Geological Society, London, Special Publications, 2015, V. 428,
DOI: http://doi.org/10.1144/SP428.1
5. Nikishin A.M., Okay A., Tuysuz O. et al., The Black Sea basins structure and history: new model based on new deep penetration regional seismic data. Part 1: Basins structure and fill, Marine and Petroleum Geology, 2015, V. 59, pp. 638–655, DOI: 10.1016/j.marpetgeo.2014.08.017
6. Nikishin A.M., Okay A., Tuysuz O. et al., The Black Sea basins structure and history: New model based on new deep penetration regional seismic data. Part 2: Tectonic history and paleogeography, Marine and Petroleum Geology, 2015, V. 59, pp. 656–670, DOI: 10.1016/j.marpetgeo.2014.08.018
7. Aleksandrova G.N., Kuznetsov N.B., Sheshukov V.S. et al., The first results of U–Pb dating of detrital zircons from the Oligocene of the southeastern part of the Voronezh anteclise and their importance for paleogeography (In Russ.), Doklady RAN. Nauki o Zemle = Doklady Earth Sciences, 2020, V. 494,no. 1, pp. 14-19,
DOI: 10.31857/S2686739720090042.
8. Popov S.V., Antipov M.P., Zastrozhnov A.S. et al., Sea level fluctuations on the northern shelf of the Eastern Paratethys in the Oligocene – Neogene (In Russ.), Stratigrafiya. Geologicheskaya korrelyatsiya, 2010, V. 18, no. 2, pp. 99–124.
9. Popov S.V., Akhmet’ev M.A., Lopatin A.V. et al., Paleogeografiya i biogeografiya basseynov Paratetisa (Paleogeography and biogeography of the Paratethys basins), Chast’ 1. Pozdniy eotsen–ranniy miotsen (Part 1. Late Eocene–Early Miocene), Moscow: Nauchnyy mir Publ., 2009, 178 p.
10. Patina I.S., Leonov Yu.G., Volozh Yu.A. et al., Crimea–Kopet Dagh zone of concentrated orogenic deformations as a transregional late collisional right-lateral strike-slip fault (In Russ.), Geotektonika = Geotectonics, 2017, no. 4, pp. 17–30, DOI: 10.7868/S0016853X17040063
11. Patina I.S., Popov S.V., Seysmostratigrafiya regressivnykh faz maykopskogo i tarkhanskogo kompleksov severnogo shel’fa Vostochnogo Paratetisa (Seismic stratigraphy of the regressive phases of the Maikop and Tarkhan complexes of the northern shelf of the Eastern Paratethys), Collected papers “Tektonika i geodinamika Zemnoy kory i mantii: fundamental’nye problemy-2023” (Tectonics and geodynamics of the Earth’s crust and mantle: fundamental problems-2023), Proceedings of LIV Tectonic meeting, Moscow: GEOS Publ., 2023, V. 2, pp. 68–72.
12. Lithological-palaeogeographic maps of the Paratethys: edited by Popov S.V., Rögl S., Rozanov A.Y. et al., Courier Forschungs-Institut Senckenberg, 2004, V. 250, 73 p.
13. Vincent S.J., Morton A.C., Hyden F., Fanning M., Insights from petrography, mineralogy and U-Pb zircon geochronology into the provenance and reservoir potential of Cenozoic siliciclastic depositional systems supplying the northern margin of the Eastern Black Sea, Marine and Petroleum Geology, 2013, V. 45, pp. 331-348,
DOI: http://doi.org/10.1016/j.marpetgeo.2013.04.002
14. Vincent S.J., Morton A.C., Carter A. et al., Oligocene uplift of the Western Greater Caucasus; an effect of initial Arabia-Eurasia collision, Terra Nova, 2007, no. 19,
pp. 160-166.
15. Afanasenkov A.P., Nikishin A.M., Obukhov A.N., Geologicheskoe stroenie i uglevodorodnyy potentsial Vostochno-Chernomorskogo regiona (Geological structure and hydrocarbon potential of the East Black Sea region), Moscow: Nauchnyy mir Publ., 2007, 172 p.
16. Bol’shoy Kavkaz v al’piyskuyu epokhu (Greater Caucasus in the Alpine era): edited by Leonov Yu.G., Moscow: GEOS Publ., 2007, 368 p.
17. Nikishin A.M., Ershov A.V., Nikishin V.A., Geological history of the Western Caucasus and associated foredeeps based on the analysis of a regional balanced section (In Russ.), Doklady RAN. Nauki o Zemle = Doklady Earth Sciences, 2010, V. 430, no. 4, pp. 515–517.
18. Kuznetsov N.B., Romanyuk T.V., Peri-Gondwanan blocks in the structure of the southern and southeastern framing of the East European platform (In Russ.), Geotektonika, 2021, no. 4, pp. 3-40, DOI: http://doi.org/10.31857/S0016853X2104010X
19. Faccenna C., Bellier O., Martinod J. et al., Slab detachment beneath eastern Anatolia: A possible cause for the formation of the North Anatolian fault, Earth Planet. Sci. Lett., 2006, V. 242, no. 1-2, pp. 85-97, DOI: http://doi.org/10.1016/j.epsl.2005.11.046
20. Koulakov I., Zabelina I., Amanatashvili I., Meskhia V., Nature of orogenesis and volcanism in the Caucasus region based on results of regional tomography, Solid Earth, 2012, no. 3, pp. 327–337, DOI: http://doi.org/10.5194/se-3-327-2012
21. Trifonov V.G., Sokolov S.Yu., Structure of the mantle and tectonic zoning of the central Alpine-Himalayan belt (In Russ.), Geodinamika i tektonofizika, 2018, V. 9, no. 4, pp. 1127-1145.
22. Avdeev B., Niemi N.A., Rapid Pliocene exhumation of the central Greater Caucasus constrained by low-temperature thermochronometry (In Russ.), Tectonics, 2011, V. 30, pp. 1–16, DOI: http://doi.org/10.1029/2010TC002808
23. Al’mendinger O.A., Mityukov A.V., Myasoedov N.K., Nikishin A.M., Modern erosion and sedimentation processes in the deep-water part of the Tuapse trough based on the data of 3D seismic survey (In Russ.), Doklady RAN. Nauki o Zemle = Doklady Earth Sciences, 2011, V. 439, no. 1, pp. 76–78.
24. Baskakova G.V., Vasil’eva N.A., Nikishin A.M. et al., Identification of the main tectonic events by using 2D-3D seismic data in the eastern Black Sea (In Russ.), Vestnik Moskovskogo universiteta. Seriya 4: Geologiya, 2022, no. 4, pp. 21–33.
