On the tectonic nature of the Western Kuban trough

Kuznetsov, N.B.; Romanyuk, T.V.; Dantsova, K.I.; Fedyukin, I.V.; Latysheva, I.V.; Shatsillo, A.V.; Maslova, O.V.; Polina, S.D.

Авторы: Kuznetsov N.B., Romanyuk T.V., Dantsova K.I., Fedyukin I.V., Latysheva I.V., Shatsillo A.V., Maslova O.V., Polina S.D.
Журнал: OIL INDUSTRY
Том: 9
Год издания: 2023
Первая страница: 78
Последняя страница: 84
Оригинальные версии: О тектонической природе Западно-Кубанского прогиба
DOI: 10.24887/0028-2448-2023-9-78-84
Аннотация: The Western Kuban trough, the water area of the Azov and the EasternBlack Seas are still among the few underexplored hydrocarbon basins. Theiroil and gas potential is directly due to the properties of the sedimentary stratathat fill them, which are controlled by the sources of drift: quartz-rich sandsand sandstones are good oil reservoirs, and clay strata are oil source complexes.Despite the long history of geological and geophysical studies of theNorthern Black Sea region and the abundance of factual material accumulatedin this region, there are still significant gaps in understanding the mechanismand history of basin filling and their Cenozoic geodynamic evolution. Inparticular, the issue of demolition source for strata of different ages has notbeen resolved. The demolition source for sands and sandstones could onlybe the complexes of the East European Platform, i.e. for the formation ofhigh-quality oil reservoirs in the indicated basins, sedimentation flows intothese basins from the north, and not from the south (regions of the modernCaucasus), are favorable. The article presents an analysis of existing ideasabout the tectonic nature of the Western Kuban trough and paleogeographicreconstructions of the Northern Black Sea region using seismostratigraphicprofiles and the results of U-Pb dating of detrital zircon grains (dZr) from sedimentarysequences. Highly detailed seismic records for the Western Ciscaucasiashow that the flow of clastic material towards the western part of themodern mountain structure of the Greater Caucasus from the north continueduntil the end of the Miocene. That is, there is currently no seismostratigraphicevidence for the existence of a mountain structure in the western partof the modern Greater Caucasus up to the beginning of the Pliocene, and theuplift of this orogen in its western segment began no earlier than the LateMiocene. The existing data of U-Pb dating of dZr from the sequences of theNorthern Black Sea region of different ages also did not reveal any signs ofthe input of erosion products from the Caucasus into the Western Kubantrough. For most of its existence, the Ciscaucasian trough had a marginalcontinental (“pericratonic”) nature and was filled mainly with sedimentaryflows from the East European Platform. Its transformation into a foothill sedimentarybasin occurred no earlier than the Pliocene. Revision of the basicideas about the method of filling and geodynamic evolution of the Ciscaucasiantrough will inevitably lead to the correction of numerical models ofgeneration-accumulation hydrocarbon systems of the Western Kubantrough.
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On the tectonic nature of the Western Kuban troughстатья

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