THE POST-SEDIMENTARY CHARACTER OF DEVELOPMENT OF INTRAPLATE DISLOCATIONS AS A REFLECTION OF IMPULSIVENESS OF DEFORMATION PROCESSES

The available data on well-studied areas of the Turan platform (as an example) are reviewed and analyzed to reveal the role of con-sedimentation and post-sedimentation tectonic movements in formation of dislocations of the sedimentary cover. At the background of the long-term (tens and hundreds of million years) quiet evolution of the territory under study, short-term intervals are distinguished, which duration amounts to the first millions of years (typically manifested in one or two stratigraphic layers); in such time intervals, tectonic movements were dramatically boosted and accompanied by land uplifting, sea regression, erosion of sediments accumulated earlier and manifestation of deformation processes.

The paleotectonic reconstructions show that during such ‘revolutionary’ stages, large tectonic elements occurred along with local uplifts that added to their complexity. In the region under study, the Pre-Jurassic, Pre-Cretaceous (Late Okoma), Pre-Danish and the Pre-Middle Miocene gaps in sedimentation are studied in detail. It is shown that only during the above four periods of sedimentation gaps and accompanying erosion-denudation processes, the regional structures gained from 50 to 80% of their current amplitudes at the bottom of the cover, and the Pre-Danish and Pre-Middle Miocene washout periods were most important.

Local uplift also developed impulsively and primarily due to the post-sedimentation movements. Cross-sections of anticlines studied in detail (Figures 1 to 3) are discussed as examples that clearly show the increase of erosional shearing of the sediments accumulated earlier towards domes of uplifts without any con-sedimentation decrease of their thicknesses. During these periods of the geologic history, regardless of their short duration, folded dislocation gained up to 65–90% of their current amplitudes. The periods of activation were separated by long relatively quiescent tectonic periods with the gradually slowing down growth of anticlines to complete cessation.

Dislocations in other regions, such as the Azov Sea (Fig. 4), the Dnieper-Donets basin, Donbas, etc. were formed under a similar scenario.

Impulsiveness of tectonic processes is well illustrated by events that recently took place at the Taman peninsula. In 2011, the sea bottom uplifted dramatically along the coastal line of the Azov Sea and formed a new land segment (Figures 5 to 8). The vertical movement amplitude amounted to minimum 5 metres. This new structure formation was due to a short-term renewal of growth of the Kamenny Cape. After the short-term activation of tectonic movements, the period of tectonic quiescence is in place, and the majority of the uplift has been destroyed by marine erosion.

Impulsiveness of tectonic movements may be caused by the tangential stress that periodically puts an impact on the lithospheric plates. Horizontal tectonic movement and associated stresses can lead to both interplate and intraplate deformations.

1. Benenson V.A., Morozov M.N., 1976. Breaks in the Mesozoic and Cenozoic sedimentation of Central Asia and the Caucasus. In: Tectonics and petroleum potential of the North-West of the Central Asian platform (Turan Plate). Nauka, Moscow, p. 49-60 (in Russian) [Бененсон В.А., Морозов М.Н. Перерывы в мезозойском и кайнозойском осадконакоплении Средней Азии и Предкавказья // Тектоника и нефтегазоносность северо-запада Среднеазиатской платформы (Ту- ранская плита). М.: Наука, 1976. С. 49-60].

2. Chirvinskaya M.V., 1964. Cyclicity of tectonic movements in the Dnieper-Donets Basin and conditions of formation of local structures. In: Issues of comparative tectonics of ancient platforms. Nauka, Moscow, p. 62-74 (in Russian) [Чирвинская М.В. Цикличность тектонических движений в Днепровско-Донецкой впадине и условия формирования локальных структур // Вопросы сравнительной тектоники древних платформ. М.: Наука, 1964. С. 62-74].

3. Dmitriev L.P., Palamar V.P., Popkov V.I., Rabinovich AA., 1979. The structural history of the Southern Mangyshlak. Ge- ologiya nefti i gaza (Oil and Gas Geology) 1, 17-22 (in Russian) [Дмитриев Л.П., Паламарь В.П., Попков В.И., Раби¬нович А.А. История формирования структуры Южного Мангышлака // Геология нефти и газа. 1979. № 1. С. 17-22].

4. Goncharov M.A., Raznitsin Yu.N., Barkin Yu.V., 2012. Specific features of deformation of the continental and oceanic litho- sphere as a result of the Earth core northern drift. Geodynamics & Tectonophysics 3 (1), 27-54. http://dx.doi.org/10.5800/ GT-2012-3-1-0060.

5. Kabyshev B.P., 1972. Rates of con-sedimentation and post-sedimentation tectonic processes in the Dnieper-Donetsk basin and the Donets basin. Geotektonika (Russian Geotectonics) 4, 59-68 (in Russian) [Кабышев Б.П. Скорость конседи- ментационных и постседиментационных тектонических процессов в Днепрово-Донецкой впадине и Донецком бассейне // Геотектоника. 1972. № 4. С. 59-68].

6. Kamaletdinov M.A., Kazantsev Yu.V., Kazantseva T.T., 1981. The Origin of Folding. Nauka, Moscow, 135 p. (in Russian) [Камалетдинов М.А., Казанцев Ю.В., Казанцева Т.Т. Происхождение складчатости. М.: Наука, 1981. 135 с].

7. Khain V.E., 1950. On the continuous-interrupted flow of tectonic processes. Izvestiya, the USSR Academy of Science, Geo¬logical Series 6, 26-44 (in Russian) [Хаин В.Е. О непрерывно-прерывистом течении тектонических процессов // Из¬вестия АН СССР. Серия геологическая. 1950. № 6. С. 26-44].

8. Khain V.E., Goncharov M.A., 2006. Geodynamic cycles and geodynamic systems of various ranks: their relationships and evolution in the Earth's history. Geotectonics 40 (5), 327-344. http://dx.doi.org/10.1134/S0016852106050013.

9. Popkov V.I., 1985. Traces of tangential compression in the platform structure of the western regions of the Turan plate. Dok- lady AN SSSR 284 (3), 674-678 (in Russian) [Попков В.И. Следы тангенциального сжатия в платформенной струк¬туре западных районов Туранской плиты // Доклады АН СССР. 1985. Т. 284. № 3. С. 674-678].

10. Popkov V.I., 1990. Tangential tectonics and oil-and-gas occurrence in the Aral-Caspian region. Doklady AN SSSR 313 (2), 420-423 (in Russian) [Попков В.И. Тангенциальная тектоника и нефтегазоносность Арало-Каспийского региона // Доклады АН СССР. 1990. Т. 313. № 2. С. 420-423].

11. Popkov V.I., 1991. Intraplate structures of lateral compression. Geotektonika (Russian Geotectonics) 2, 13-27 (in Russian) [Попков В.И. Внутриплитные структуры бокового сжатия // Геотектоника. 1991. № 2. С. 13-27].

12. Popkov V.I., 2000. Stress tectonics. Generation, migration and accumulation of hydrocarbons - basic regularities. In: New ideas in geology and geochemistry of oil and gas. Petroleum Geology - results of the 20th century. Moscow State Uni¬versity, Moscow, p. 155-156 (in Russian) [Попков В.И. Стресс-тектоника. Генерация, миграция и аккумуляция УВ - основные закономерности // Новые идеи в геологии и геохимии нефти и газа. Нефтегазовая геология - итоги XX века. М.: МГУ, 2000. С. 155-156].

13. Popkov V.I., 2004. On impulsivity of the platform structure formation. The South-Russian Journal of Geology, Geography and Global Energy 3 (9), 167-173 (in Russian) [Попков В.И. Об импульсивности платформенного структурообразо- вания // Южно-Российский вестник геологии, географии и глобальной энергии. 2004. Т. 9. № 3. С. 167-173].

14. Popkov V.I., 2005. The stress tectonics of the lithospheric plates. Ecological Bulletin of Scientific Centres of the Black Sea Economic Union 1, 71-79 (in Russian) [Попков В.И. Стресс-тектоника литосферных плит // Экологический вестник научных центров Черноморского экономического сотрудничества. 2005. № 1. С. 71-79].

15. Popkov V.I., 2009. Fold-thrust dislocations in the sedimentary cover of the Azov Sea. Geotectonics 43 (4), 324-332. http:// dx.doi.org/10.1134/S0016852109040062.

16. Popkov I.V., 2012a. Activation of tectonic movements at the Taman Peninsula. Geology, Geography, and Global Energy 2, 124-128 (in Russian) [Попков И.В. Активизация тектонических движений на Таманском полуострове // Геология, география и глобальная энергия. 2012. № 2. С. 124-128].

17. Popkov I.V., 2012b. On anomalously high velocities of tectonic movements in mud volcanism areas. Geology. Proceedings, the Earth Sciences and Natural Resources of Bashkiria 7, 27-32 (in Russian) [Попков И.В. Об аномально высокой скорости тектонических движений в областях развития грязевого вулканизма // Геология. Известия Отделения наук о Земле и природных ресурсов АН РБ. 2012. № 17. С. 27-32].

18. Popkov V.I., 2012c. On the impulsive nature of development of intraplate dislocations of lateral compression. Geology. Proceedings, the Earth Sciences and Natural Resources of Bashkiria 17, 33-40 (in Russian) [Попков В.И. Об импульсивном характере развития внутриплитных дислокаций бокового сжатия // Геология. Известия Отделения наук о Земле и природных ресурсов АН РБ. 2012. № 17. С. 33-40].

19. Popkov V.I., 2012d. Tectonic impulses and dislocation process. In: The Third tectonophysical conference in IPE RAS. Tectonophysics and current issues of the Earth Sciences. Conference Proceedings, October 8-12, 2012. IPE RAS, Moscow, Vol. 2, p. 35-38 (in Russian) [Попков В.И. Тектонические импульсы и дислокационный процесс // Третья тектоно- физическая конференция в ИФЗ РАН. Тектонофизика и актуальные вопросы наук о Земле. Материалы докладов конференции 8-12 октября 2012 г. М.: ИФЗ РАН, 2012. Т. 2. C. 35-38].

20. Popkov V.I., Eldarov A.S., 1988. Specific features of the structure and the mechanism of formation of local uplifts at the Buzachi peninsula. Izvestia, the USSR Academy of Science, Geological Series 3, 127-132 (in Russian) [Попков В.И., Эльдаров А.С. Особенности строения и механизм формирования локальных поднятий полуострова Бузачи // Из¬вестия АН СССР. Серия геологическая. 1988. № 3. С. 127-132].

21. Popkov V.I., Fomenko V.A., Glazyrin E.A., Popkov I.V., 2012. The catastrophic tectonic event in the Kerch-Taman mud volcano area. In: The Third tectonophysical conference in IPE RAS. Tectonophysics and current issues of the Earth Sciences. Conference Proceedings, October 8-12, 2012. IPE RAS, Moscow, Vol. 1, p. 411-414 (in Russian) [Попков В.И., Фоменко В.А., Глазырин Е.А., Попков И.В. Катастрофическое тектоническое событие в Керченско-Таманской грязевулканической области области // Третья тектонофизическая конференция в ИФЗ РАН. Тектонофизика и актуальные вопросы наук о Земле. Материалы докладов конференции 8-12 октября 2012 г. М.: ИФЗ РАН, 2012. Т. 1. C. 411-414].

22. Popkov V.I., Fomenko V.A., Glazyrin E.A., Popkov I.V., 2013. A catastrophic tectonic event of summer 2011 in the Taman Peninsula. Doklady Earth Sciences 448 (2), 172-174. http://dx.doi.org/10.1134/S1028334X13020207.

23. Popkov V.I., Nugmanov Ya.D., 1983. The impact of upward tectonic movements on formation of the structure of the Southern Mangyshlak basin. Izvestia, the USSR Academy of Science, Geological Series 6, 113-120 (in Russian) [Попков В.И., Нугманов Я.Д. Значение восходящих тектонических движений в формировании структуры Южно-Мангышлак- ского прогиба // Известия АН СССР. Серия геологическая. 1983. № 6. С. 113-120].

24. Raznitsin Y.N., 2006. Tectonic Layering of the Lithosphere of Young Oceans and Paleobasins. Nauka, Moscow, 270 p. (in Russian) [Разницин Ю.Н. Тектоническая расслоенность литосферы молодых океанов и палеобассейнов. М.: Наука, 2006. 270 с.].

25. Schlesinger A.E., 1965. The Structural Position and Development of Mangyshlak Dislocations. Nauka, Moscow, 217 p. (in Russian) [Шлезингер А.Е. Структурное положение и развитие Мангышлакской системы дислокаций. М.: Наука, 1965. 217 с.].

26. Usov M.A., 1945. The main forms of tectonic movements. In: Problems of geology of Siberia: The collection is dedicated to the memory of Academician M.A. Usov. AN SSSR, Moscow, Leningrad, Vol. 1, p. 315-327 (in Russian) [Усов М.А. Основные формы тектонических движений // Вопросы геологии Сибири: сборник, посвященный памяти акаде¬мика М.А. Усова. М.-Л.: АН СССР, 1945. Т. 1. С. 315-327].

27. Vorobyev B.S., Voronoy E.E., 1966. On education non-salt-dome structures in the Dnieper-Donets basin. Proceedings of UkrNIIgaz 2, 66-82 (in Russian) [Воробьев Б.С., Вороной Е.Е. К вопросу образования несолянокупольных структур в Днепрово-Донецкой впадине // Труды УкрНИИгаз. 1966. Вып. 2. С. 66-82].