СТРУКТУРНІ ОСОБЛИВОСТІ КРИСТАЛІЧНОГО ФУНДАМЕНТУ ГОЛОВАНІВСЬКОЇ ШОВНОЇ ЗОНИ В БАСЕЙНІ Р. ЯТРАНЬ ЗА ТЕКТОНОФІЗИЧНИМИ ДАНИМИ

С.  Мичак; С.  Курило; Г. Муровська

doi:10.17721/17282713.80.03

Authors

S. Mychak Institute of Geophysics National Academy of Sciences of Ukraine 32 Palladina Ave., Kyiv, 03680, Ukraine
S. Kurylо Institute of geochemistry, mineralogy and ore formation of the National Academy of Sciences of Ukraine 34 Palladina Ave, Kyiv, 03680, Ukraine
A. Murovskaya Institute of Geophysics National Academy of Sciences of Ukraine 32 Palladina Ave., Kyiv, 03680, Ukraine

DOI:

https://doi.org/10.17721/17282713.80.03

Keywords:

Ukrainian shield, Golovanevsk suture zone, deformations, stress fields, fault zones

Abstract

The article presents the results of tectonophysical study of the upper part of the Earth's crust of the Yatran block of the Golovanevsk suture zone within the Ukrainian Shield, performed in 2016 in the basin of the middle and lower reaches of the Yatran River. The purpose of the work was to study the deformation of rocks and restore paleostresses for the subsequent construction of the geodynamic model of the earth's crust of the Pobuzhsky ore mining district. Field tectonophysical studies were performed using the structural-paragenetic method for I-II depth levels. To construct stereograms of linear structures and fracturing of rocks, the Stereonet program was used. The obtained data made it possible to clarify the tectonic history and mechanisms of deformation of the Yatran block. The obtained results allow to conclude that the studied linear and banded structure of the rocks was formed at the early stages of right and left strike-slip deformation within the Golovanevsk suture zone, after that a diagonal systems of brittle cracks were formed at the stages of W-E and N-S compression. The early crystallization cleavage and schistosity, linear and banded texture of the rocks were formed at the early stages of the right- and left-shear deformation of the Golovanevsk suture zone. The milonite monoclines and structural textural elements of fault zones are widely developed in zones of maximal shear deformations (Shear zone). The migmatite-granite igneous monoclines with potash feldspar mineralization are widely developed in the Early Proterozoic Talnovsk fault zone. Plagiomigmatitic monoclines are developed in the Neo-Archaic Emilovsk fault zone. Later, a diagonal system of cracks was formed at the stages of sublatitudinal compression and extension. The youngest crack system of the Yatran block was formed at the stages of the north-west – south-east and north-east – south-west compression-extension. Thus, the results of work return the researchers to the study of rock fracturing with the aim of the investigation of the geodynamic evolution. This article shows a structural-petrophysical and tectonophysical schematic base of the geological-structural map of the surface of the crystalline basement, on which geological-petrophysical taxons and structural-kinematic data on deformations of the upper part of the earth's crust of the studied region are displayed. The construction of a model of the stress-strain state of the earth's crust of the region is necessary for further geological-prospecting and engineering-geological researches.

References

Antciferov, A.V. (Ed.). (2008). Geological and geophysical model of the Golovanevsk suture zone of the Ukrainian shield. Kyiv: Naukova dumka, 308 p. [in Russian].

Antciferov, A.V. (Ed.). (2006). Geological and geophysical model of the Krivorozhsko-Kremenchug Suture Zone of the Ukrainian Shield. Kyiv: Naukova dumka, 196 p. [in Russian].

Shcherbak, N.P. (Ed.). (2005) Geochronology of the Early Precambrian of the Ukrainian Shield. Kyiv: Naukova dumka, 196 p. [in Russian].

Gintov, O.B., Mychak, S.V. (2011). Geodynamic development of the Ingul megablock of the Ukrainian Shield for geological-geophysical and tectonophysical data. I. Geofizicheskiy Zhurnal, 3, 102-118. [in Russian].

Gintov, O.B., Mychak, S.V. (2011). Geodynamic development of the Ingul megablock of the Ukrainian Shield for geological-geophysical and tectonophysical data. II. Geofizicheskiy Zhurnal, 4, 89-99. [in Russian].

Gintov, O.B., Gonchar, V.V. (2004). Modeling of intra- and near-fault folds in Precambrian complexes from the viewpoint of non-axial progressive deformation. Geofizicheskiy Zhurnal, 2, 62-72. [in Russian].

Gintov, O.B. (2005). Field tectonophysics and its applications in the study of deformations of the earth's crust of Ukraine. Kiev: Feniks, 572 р. [in Russian].

Gintov, O.B. (2015). Problems of geodynamics of the Ukrainian Precambrian. Geofizicheskiy Zhurnal, 5, 3-21.

Gintov, O.B., Isay, V.M. (1988). Tectonophysical research of faults in the consolidated crust. Kyiv: Naukova dumka. 226 p. [in Russian].

Gintov, O.B., Paschkevic, I.K. (2010). Tectonophysical analysis and geodynamic interpretation of the three-dimensional geophysical model of the Ukrainian Shield. Geofizicheskiy Zhurnal, 2, 3-27. [in Russian].

Glevasky, E.B., Kalaev, G.I. (2001). Precambrian Tectonics of the Ukrainian Shield. Mineralogical journal (Ukraine),2, 77-91. [in Russian].

Glevasky, E.B. (2005). The solution of some problems of petrology and stratigraphy of the Ukrainian shield from the positions of plate tectonics. Mineralogical journal (Ukraine), 3, 57-66. [in Russian].

Gojik, P.F., Semenenko, V.M., Poletaev, V.I. (2012). Stratigraphic Code of Ukraine. Kyiv: Logos. [in Ukraine].

Gonchar, V.V. (2001). Progressive non-axial deformation and problems of diagnostics of structures. Reports of the National Academy of Sciences of Ukraine, 9, 108-114. [in Russian].

State geological map of Ukraine. Scale 1 : 200,000. Geological map and map of minerals of the crystalline basement. Central-Orion series. Sheet M36-ХХХІ (Pervomaysk). (2004). Kyiv: State Geological Service. [in Russian].

Entin, V.A. (2005). Geophysical basis of the tectonic map of Ukraine of scale 1 : 1 000 000. Geofizicheskiy Zhurnal,1, 74-84. [in Russian].

Lukienko, O.I., Kravchenko, D.V., Suhorada, A.V. (2008). Dislocation Tectonics and Tectonofacies of the Precambrian of the Ukrainian Shield. Kyiv: VPC Kyivsky universitet, 279 p. [in Ukraine].

Mychak, S.V. (2015). Kinematics of the formation of the western and central parts of the Ukrainian Shield in the period 2.05 – 2.02 billion years ago. Geofizicheskiy Zhurnal, 1, 83-99. [in Russian].

Shevchuk, V.V., Kravchenko, D.V., Mazko, A.E. (2013). Pervomaysk granito-gneiss monocline along the river Yuzhny Bug. Visnyk of Taras Shevchenko National University of Kyiv. Geology, 57, 5-8. [in Ukraine].

Stoyanov, S.S. (1977). The mechanism of formation of rupture zones. Moskov: Nedra, 144 p. [in Russian].

Entin, V.A., Gintov, O.B., Mychak, S.V. (2015). The structure of the Moldovka iron ore deposit (the Ukrainian Shield) on geological and geophysical data and its possible endogenous nature. Geofizicheskiy Zhurnal, 4, 3-18. [in Russian].

Gintov, O.B., Entin, V.A., Mychak, S.V. (2016). Structuralpetrographic and tectonophysical basis of the geological map of the crystalline basement of the central part of the Golovanevskaya suture zone of the Ukrainian Shield. Geofizicheskiy Zhurnal, 3, 3-28. [in Russian].

Kuprienko, P.Y., Makarenko, I.B., Starostenko, V.I., Legostaeva, O.V. (2007). Three-dimensional density model of the Earth's crust and upper mantle of the Ukrainian Shield. Geofizicheskiy Zhurnal, 5, 3-27. [in Russian].

Shevchuk, V.V., Lavrenyk, M.V., Kravchenko, D.V. (2013). Fundamentals of Structural Analysis. Kyiv: VPC Kyivsky universitet, 287 p. [in Ukraine].

Shevchuk, V.V. (2012). Ratio of Proterozoic autochthonous granite formation and deformation processes within the Talnian fault zone (Ukrainian Shield). Visnyk of Taras Shevchenko National University of Kyiv. Geology, 56, 5-7. [in Russian].

Shevchuk, V.V., Kuz, I.S., Yurchishen, A.S. (2002). Tectonophysical bases of structural analysis. Lviv: Publishing House of Lviv National Ivan Franko University, 124 p. [in Ukraine].

Allmendinger, R.W., Cardozo, N., Fisher, D. (2012). Structural geology algorithmas: vectors and tensors. Cambridge, United Kingdom: Cambridge University Press, 313 p.

Cardozo, N., Allmendinger, R.W. (2012). Spherical projections with OSXStereonet . Computers & doi:10.1016/j.cageo.2012.07.021. Geosciences, 51, 193-205.

Bogdanova, S.V., Gintov, O.B., Kurlovich, D., Lubnina, N.V., Nilsson, M., Orluk, M.I., Starostenko, V.I. (2012). Late Palaeoproterozoic mafic dyking in the Ukrainian Shield of Volgo-Sarmatia caused by rotations during the assembly of supercontinent Columbia (Nuna). Lithos, 174, 196-216. doi:10.1016/S0024-4937(12)00439-2.

Skempton, A.W. (1966). Some observations on tectonic shear . Proc. I Int. Congr. Rock Mech, 1, 55-58.