Regional petroleum geology
Section editor – PhD in geology and mineralogy Makarevich V.N.
| Article # 35_2020 | submitted on 07/21/2020 displayed on website on 10/22/2020 |
| 20 p. | Bartashchuk A.V. |
| Colisional deformations of the Dnieper-Donets Basin. Part 2. Geodynamic modes and kinematic mechanism of tectonic inversion | |
| The tectonic inversion of the Dnieper-Donets Basin and the Donets Foldbelt began in the Late Hercynian epoch under the influence of collisional movements of the left-sided knematics of the compression orogen on the edge of the Paleotethis. It is shown that as a result of gently inclined disruptions in the Paleozoic platform cover of the West Donets Graben, a thrust lattice was formed, which controlled the processes of collisional buckling of the horizons in the thrust and strike-slip modes. As a result of the displacement of geomasses from the axial zones of maximum compression to the zones of "geodynamic shadow" - in the direction of the Basin borders in the northern and axial parts of the Graben, linear uplift folds were formed, and in the southern - thrust covers. At the Late Mesozoic and Cenozoic, in the mode of interference of the uplift-thrust and strike-slip fields of the reverse, right-sided kinematics of movements, deformations of the Hercynian thrust lattice and the dynamically conjugated linear near-fault folding took place with the formation of coulisse articulated upthrust-fold zones and en-echelonly overthrust covers. The geodynamic setting of the grouping of the compression axes in the western part of the Donbass, which was experiencing orogenic uplift, caused the thrust of allochthonous geomasses to the syneclise related autochthon of the southeastern segment of the depression. In the West Donets Graben, this caused an increase in the section beyond the Hercynian Neoautochthon and the Cimmerian-Alpine allochthon with the formation of a clinoform wedging Segment. Along the main strike-slip faults, which form the tectonic rails of its invasion, geodynamic zones of geomass squeezing out, formed by curvilinear, en-echelonly upthrow folds, were formed. In the foreland of the Segment, at the ends of dynamically coupled thrust and strike-slip faults, a forward compression fan is formed; in the hinterland, on the roots of thrust covers, folded suture zones are formed. Based on the results of the kinematic analysis of the Hercynian and Alpine deformation structures, a new kinematic model of the tectonic inversion of the riftogenic structure of the Southeastern Segment of the Dnieper-Donets Basin has been developed. In accordance with it, the deformations of the sedimentary cover of the West Donets Graben were carried out according to the kinematic mechanism of a transverse orocline of pushing geomasses of the sub-thrust type, under the pressure of the tectonic stamp of the Donets Foldbelt. Keywords: geodynamic modes, kinematic deformation mechanism, wedging segment, forward compression fan, folded sutures, thrusting orocline, tectonic stamp, Dnieper-Donets Basin. |
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| article citation | Bartashchuk A.V. Kollizionnye deformatsii Dneprovsko-Donetskoy vpadiny. Chast' 2. Geodinamicheskie rezhimy i kinematicheskiy mekhanizm deformatsiy [Colisional deformations of the Dnieper-Donets Basin. Part 2. Geodynamic modes and kinematic mechanism of tectonic inversion]. Neftegazovaya Geologiya. Teoriya I Praktika, 2020, vol. 15, no. 4, available at: http://www.ngtp.ru/rub/2020/35_2020.html |
| DOI | https://doi.org/10.17353/2070-5379/35_2020 |
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Gintov O. Polevaya tektonofizika i ee primenenie pri izuchenii deformatsiy zemnoy kory Ukrainy [Field tectonophysics and its application in the study of deformations of the earth's crust in Ukraine]. Kiev: Feniks, 2005, 572 p.
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Gonchar V. Formirovanie i osadochnoe zapolnenie Dneprovsko-Donetskoy vpadiny (geodinamika i fatsii) v svete novykh dannykh paleotektonicheskogo modelirovaniya [Formation and sedimentary filling of the Dnieper-Donetsk depression (geodynamics and facies) in the light of new data of paleotectonic modeling]. Geofizicheskiy zhurnal, 2018, vol. 40, no. 2, pp. 67-94.
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Gzovskiy M. Osnovy tektonofiziki [Fundamentals of tectonophysics]. Moscow: Nauka, 1975, 536 p.
Kaz'min V., Tikhonova N. Rannemezozoyskie okrainnye morya v Chernomorsko-Kavkazskom regione: paleotektonicheskie rekonstruktsii [Early Mesozoic marginal seas in the Black Sea-Caucasus region: paleotectonic reconstructions]. Geotektonika, 2005, no. 5, pp. 20-35.
Khain V. Regional'naya geotektonika. Vneal'piyskaya Evropa i Zapadnaya Aziya [Regional geotectonics. Extra-Alpine Europe and Western Asia]. Moscow: Nedra, 1976, pp. 185-205.
Kopp M. Strukturnye risunki, svyazannye s prodol'nymi peremeshcheniyami vnutri skladchatykh poyasov (na primere Sredizemnomorsko-Gimalayskogo poyasa) [Structural drawings associated withlongitudinal movements inside the folded belts (on the example of the Mediterranean-Himalayan belt)]. Geotektonika, 1991, no. 1, pp. 21-36.
Kopp M., Kolesnichenko A., Mostryukov A., Vasil'ev N. Rekonstruktsiya kaynozoyskikh napryazheniy/deformatsiy vostoka Russkoy plity i puti ee primeneniya dlya resheniya regional'nykh i prikladnykh zadach [Reconstruction of Cenozoic stress and deformations in the eastern east european platform with its regional and practical application]. Geodinamіka, 2017, no.2 (2), pp. 46-66.
Kopp M., Korchemagin V. Kaynozoyskie polya napryazheniy/deformatsiy Donbassa i ikh veroyatnye istochniki [Cenozoic stress / strain fields of the Donbass and their probable sources]. Geodinamіka, 2010, no. 1(9), pp. 17-48.
Korchemagin V., Emets V. Osobennosti razvitiya tektonicheskoy struktury i polya napryazheniy Donbassa i Vostochnogo Priazov'ya [Peculiarities of the development of the tectonic structure and stress field of Donbas and the Eastern Azov region]. Geotektonika, 1987, no. 3, pp. 49-55.
Korchemagin V., Ryaboshtan Yu. Tektonika i polya napryazheniy Donbassa. Polya napryazheniy i deformatsiy v zemnoy kore [Tectonics and stress fields of Donbass. Fields of stress and strain in the Earth's crust]. Moscow: Nauka, 1987, pp. 164-170.
Meyers M., Hammers M., van Hinsbergen D., Kitchka A., Langereis C., Stephenson R. New late Paleozoic paleopoles from the Donbas Foldbelt (Ukraine): New late Paleozoic paleopoles from the Donbas Foldbelt (Ukraine): Implications for the Pangea A vs. B controversy. Earth and Planetary Science Letters, 2010, vol. 297(1-2), pp. 18-33.
Popov V. Donetskiy baseyn: tektonika. Geologiya uglya i goryuchikh slantsev SSSR. T.1 [Donetsk Basin: Tectonics. Geology of coal and oil shale in the USSR. Vol. 1]. Moscow: GONTI, 1963, pp. 103-151.
Stovba S., Stifenson R. Sravnitel'nyy analiz stroeniya i istorii formirovaniya yugo-vostochnoy chasti Dneprovsko-Donetskoy vpadiny i Donetskogo skladchastogo sooruzheniya [Comparative analysis of the structure and history of the formation of the southeastern part of the Dnieper-Donetsk depression and the Donetsk fold structure]. Geofizicheskiy zhurnal, 2000, vol. 22, no. 4, pp. 37-61.
Subbotin S. Sollogub V., Chekunov A. Stroenie i evolyutsiya zemnoy kory Ukrainy i sopredel'nykh regionov Tetisa v svete novykh dannykh i predstavleniy [Structure and evolution of the earth's crust in Ukraine and adjacent regions of Tethys in the light of new data and concepts]. Geofizicheskiy sbornik, 1976, pp. 13-45.
Tektonіchna karta Ukraїni. Masshtab 1:1000000 [Tectonic map of Ukraine. Scale 1:1,000,000]. Editors S. Kruglov, D. Gurs'kiy, 2007, 95 p.
Zonenshayn L., Kuz'min M., Natapov L. Tektonika litosfernykh plit territorii SSSR. Kn. 1, Kn. 2. [Tectonics of lithospheric plates in the USSR. Book 1, 2]. Moscow: Nedra, 1990, 328 p., 334 p.