DOI: https://doi.org/10.24028/gzh.0203-3100.v40i6.2018.151000

The structure of the Western and Central parts of the Ukrainian schield. Controversial issues

О. B. Gintov, M. I. Orlyuk, V. A. Entin, I.K. Pashkevich, S. V. Mychak, M. I. Bakarzhieva, L. M. Shimkiv, A. V. Marchenko

Abstract


Some controversial issues of composing the Scheme of the fault megablock tectonics of the western half of the Ukrainian shield in connection with the decision of the Interdepartmental Tectonic Committee of Ukraine on drawing up the Tectonic map of the Ukrainian shield at a scale of 1:500 000 have been considered. Geophysical data must be more fully taken into account and used in detail and objectively reflecting both the surface and the deep structure of the Earth’s crust of the shield while drawing up such a Scheme. The latest maps of anomalous magnetic and gravitational fields, a map of the topography of the Moho surface and other materials are given, the analysis of which gives grounds for a number of conclusions on specific structures of the western and central parts of the region. It has been established that the formation of a typical megablock structure of the Ukrainian shield began not earlier than in the Neoarchean. It is difficult unambiguously to establish and trace the investigated Archean fault zones in the part of the shield  at the present time, and sometimes practically it is almost impossible, since the Early Proterozoic processes of regional granitization and dynamometamorphism radically changed the composition and structure of the earth’s crust. Geophysical data, supported by geological and tectonophysical observations, clearly record the Proterozoic fault zones, which began to form after 2.5 billion years ago. They cross and deform both the Archean and the Early Proterozoic granitoid complexes, accompanied by intensive diffusion, metasomatism and ore formation. It is proved that the Archean-Early Proterozoic structural-formation complexes (SFC), mapped within the shield, cannot and should not be artificially linked with the Proterozoic fault-megablock structure, which was formed at the end of the Early Proterozoic and superimposed on the SFC. It seems like the dubious and outdated thesis about the subhorizontal-floor structure of the Early Precambrian crust of the Ukrainian shield, according to which the structural floors of the crust are formed one above another by stratometamorphic complexes characterized by a directly proportional relationship of age and the degree of regional metamorphism of the rocks. This concept does not take into account the significant role of horizontal motions of lithospheric blocks, which cause the redistribution and localization of PT conditions in the earth’s crust.


Keywords


Ukrainian shield; tectonics; structure; faults; megablocks; structural-formational complexes; diaftoresis

References


Belevtsev, Ya. M., Pruss, A. K. (1962). The main stages of the geological development of the Ukrainian shield. Geologicheskiy zhurnal, 22(5), 3—27 (in Russian).

Bondarchuk, V. G. (1959). Geology of Ukraine. Kiev: Edited by the Academy of Sciences of the UkrSSR (in Russian).

Shcherbak, N. P. (Ed.). (1984). Geological map of the Precambrian formations of the Ukrainian shield at the scale of 1:1000 000. Kiev: Ministry of Geology of the Ukrainian SSR (in Russian).

Geological map of crystal base of scale 1:200 000. (1990). Sheet M-36-ХХХІ (Pervomaysk). Kiev: The State Enterprise «Ukrainian Geological Company» (in Russian).

Gintov, О. B. (2004). Zones of faults of the Ukrainian shield. Influence of the processes of faulting on the formation of the structure of the earth’s crust. Geofizicheskiy zhurnal, 26(3), 3―24 (in Russian).

Gintov, О. B., Entin, V. A., Mychak, S. V., Pavlyuk, V. N., & Zyultsle, V. V. (2016). Structural- petrophysical and tectonophysical base of geological map of crystalline basement of the central part of Golovanevsk suture zone of the Ukrainian Shield. Geofizicheskiy zhurnal, 38(3), 3―28. https://doi.org/10.24028/gzh.0203-3100.v38i3.2016.107777 (in Russian).

Gintov, О. B. (2005). Field tectonophysics and its application in the study of deformations of the earth’s crust of Ukraine. Kiev: Feniks (in Russian).

Gintov, О. B. (2015). Problems of geodynamics of the Ukrainian shield in Precambrian. Geofizicheskiy zhurnal, 37(5), 3―22. https://doi.org/10.24028/gzh.0203-3100.v37i5.2015.111142 (in Russian).

Gintov, O. B. (2014). Scheme of periodization of faulting stages in the Earth’s crust of the Ukrainian Shield — new data and consequences. Geofizicheskiy zhurnal, 36(1), 3―18. https://doi.org/10.24028/gzh.0203-3100.v36i1.2014.116145 (in Russian)Gintov, O. B., Pashkevich, I. K. (2010). Tectonophysical analysis and geodynamic interpretation of the three-dimensional geophysical model of the Ukrainian Shield. Geofizicheskiy zhurnal, 32(2), 3―27. https://doi.org/10.24028/gzh.0203-3100.v32i2.2010.117553 (in Russian).

Glevassky, E. B., & Kalyaev, G. I. (19980. Precambrian and plate tectonics (the problem of plate tectonic reconstructions of the south-western segment of the East European platform). In Geology and Precambrian Stratigraphy of the Ukrainian Shield: Abstracts of the All-Ukrainian Inter-Agency Meeting (pp. 38―40). Kiev (in Russian).

State geological map of Ukraine. (2004). Scale 1:200 000. Geological map and map of minerals of the crystalline basement. Central-Ukrainian series. Sheet M-36-ХХХІ (Pervomaysk). Kyev: Ministry of ecology of natural resources of Ukraine, State Geological service (in Ukrainian).

State geological map of Ukraine. (2011). Scale 1:200 000. Geological map and map of minerals of the crystalline basement. Central-Ukrainian series. Sheet M-35-XXXVІ (Gaivoron). Kyiv: Ministry of ecology of natural resources of Ukraine, State Geological service (in Ukrainian).

Dovgan, R. M., Entin, V. A., Pavlyuk, V. М. (2009). Khmelnitsky-Odessky orthocraton, as the leading lithosphere megastructure of the edge of the Eastern-European platform and its prospecting attraction on diamonds. Mineralni resursy Ukrayiny, (1), 6—10 (in Ukrainian).

Entin, V. A. Guskov, S. I., Orlyuk, M. I., Gintov, O. B., Osmak, R. V. (2015). Map of absolute gravity fields values in Ukraine and some aspects of its possible interpretation. Geofizicheskiy zhurnal, 37(1), 53―56. https://doi.org/10.24028/gzh.0203-3100.v37i1.2015.111323 (in Russian).

Entin, V. A. (2008). Geophysical criteria and problems of the structural and tectonic region of the crystal foundations of the Ukrainian shield due to the actuals of their personification on tectonic map of Ukraine, scale 1:1000 000. Mineralni resursy Ukrayiny, (3), 9—12 (in Ukrainian).

Entin, V. А., & Shimkiv, L. M. (2004). Geophysical ground of the megablock principle of zoning for stratigraphic correlation of the Precambrian formations of the Ukrainian shield. Mineralni resursy Ukrayiny, (1), 12—13 (in Ukrainian).

Entin, V. А., Shimkiv, L. M., Nechaeva, T. S., Dzyuba, B. M., Gintov, O. B., Pashkevich, І. К., Krasovsky, S. S. (2002). Preparation of the geophysical base of the tectonic picture of Ukraine, scale 1:1000 000. Kyiv: Heoinform Ukrainy (in Ukrainian).

Kalyaev, G. I. (Ed.). (1984). Map of the fault-block tectonics of the Ukrainian Shield, scale 1:1000 000. Kiev: Edition of the Ministry of Geology of the USSR (in Russian).

Kirilyuk, V. P. (2007а). Geological and geotectonical zoning of the foundation of the Ukrainian shield (history and point of problems). Visnyk Lvivskoho universytetu. Seriya heolohichna, (21), 45―63 (in Ukrainian).

Kirilyuk, V. P. (2007b). Tectonics map of Ukraine. Scale 1:1000 000. Part II. Tectonics to the foundation of the Ukrainian shield. Scale 1:2 000 000. An explanatory note. Kyiv: UkrDGRI (in Ukrainian).

Correlational chronostratigraphic scheme of the early Precambrian Ukrainian shield. Explanatory note. (2004). Кyiv: UkrDGRI (in Ukrainian).

Kostenko, M. M. (2016). Geotectonic zoning of the Ukrainian Shield is the unique foundation of the tectonic, stratigraphic and other structures. Zbirnyk naukovykh prats UkrDHRI, (3), 144―163 (in Ukrainian).

Kostenko, M. M., Avramets, V. M., Shutenko, L. M., Ivanov, A. І., Kobets, F. V. (2015). Tectonics of the Precambrian crystalline basement of the bilocerkiv-odessa structural-formation zone. Zbirnyk naukovykh prats UkrDHRI, (4), 116―132 (in Ukrainian).

Kostenko, M. M., & Shutenko, L. M. (2018). The problematic matter of the geotectonic geological area of the foundation of the Ukrainian shield and the ways of its decision. Mineralni resursy Ukrayiny, (2), 21—29 (in Ukrainian).

Semenenko, N. P. (Ed.). (1975). Criteria for forecasting of the Ukrainian Shield field and its surroundings. Kiev: Naukova Dumka (in Russian).

Kutas, R. I., Orlyuk, M. I., Pashkevich, I. K., Burakhovich, T. K., Makarenko, I. B., & Bugaenko, I. V. (2018). General information. In Essays on Geodynamics of Ukraine (pp. 17―23). Кiev: Ed. «Vi En Ei» (in Russian).

Nechaev, S. V., Voynovsky, A. S., Isakov, L. V., Anishenko, T. M., Shukshina, L. V., Churubov, S. S., Parfenova, A. Ya. (2005). Report on scientific research work «Forecast-metallogenic mapping of raremetallic mineralization of the Ukrainian schield of scale 1:500 000». Kyiv: UkrDGRI (in Ukrainian).

Orlyuk, M. I. (1996). The technique and the first results of the construction of the four-dimensional magnetic model of the earth’s crust of Ukraine. Dopovidi NAN Ukrainy, (5), 95―99 (in Russian).

Orlyuk, M. I. (2000). Spatial and spatio-temporal magnetic models of the multi-rank structures of the lithosphere of the continental type. Geofizicheskiy zhurnal, 22(6), 148―165 (in Russian).

Orlyuk, M. I., Pashkevich, I. K., Burakhovich, T. K., Kuprienko, P. Ya., Makarenko, I. B., Tsvetkova, T. A. (2018). Ukrainian shield. In Essays on Geodynamics of Ukraine (pp. 24―35). Кiev: Ed. «Vi En Ei» (in Russian).

Pavlyuk, V. M., Bobrov, O. B., Visotsky, B. L., Dovgan, R. M., Zhovinsky, E. Ya., Kostenko, M. M., Tsimbal, S. М. (2008). Report on «Geology, petrology, geochemistry, age and ore-bearing of mafit-ultramafitic association of the Western part of the Ukrainian shield». Books 1-6. Kiev: The State Enterprise “Ukrainian Geological Company” (in Russian).

Sollogub, V. B. (1986). Lithosphere of Ukraine. Kiev: Naukova Dumka (in Russian).

Starostenko, V. I., Gintov, O. B., Kutas, R. I. (2011). Geodynamic development of the lithosphere of Ukraine and its role in the formation and location of mineral deposits. Geofizicheskiy zhurnal, 33(3), 3―22. https://doi.org/10.24028/gzh.0203-3100.v33i3.2011.116919 (in Ukrainian).

Starostenko, V. І., Gintov, О. B., Kutas, R. І. (2016). Geophysical investigations for raising search minerals effectivity in Ukraine. Visnyk NAN Ukrainy, (3), 1―9. https://doi.doi.org/10.15407/visn2016.03.054 (in Russian).

Creation of the complex three-dimensional geophysical model of the lithosphere in connection with magmatism, tectonics and the formation of the minerals of the Ukrainian shield. Report of ІGF of NAS of Ukraine. (2006). Kiev: Ukrgeolfund (in Ukrainian).




Creative Commons License
Licensed under a Creative Commons Attribution 4.0 International License.