Stress-deformed state of the Earth crust of the Bug mining area in the section Gayvoron—Zavalye

S. V. Mychak, G. V. Murovskaya, E. B. Polyachenko, V. M. Belskyi


Results of tectonic-physical studies of the upper part of the Earth mantle of the Bug mining area of the Bug block of the Ukrainian shield fulfilled in 2017 in the basin of the upper and middle course of the Southhern Bug river have been presented in the paper. The aim of the studies is examination of the rocks deformations character and reconstruction of paleostrains for subsequent plotting of geodynamic model of the Earth crust for the Bug mining area. Field tectonic-physical studies have been fulfilled by a structural-paragenetic method of tectonic-physics for different depth levels. For plotting stereograms for orientation of rocks jointing and other structural elements the program Stereonet was used. The rocks of the area are characterized by structural-textural anisotropy and are interrupted by numerous zones of polytectonites. The structural elements of the studied territory were mainly formed by the effect of rockslide deformational regimes with sub-horizontal position of the main (maximal and minimal) normal strains. At the early stages of right- and left-shift deformations of the Gaivoron-Zavalye block early flow cleavage and schistosity, linear and banded texture of rocks were formed. In zones of maximal rockslide deformations monocline and structural-textural elements (STE) are widely developed. Strain field calculated by STE is close to the strain field of the Kirovograd stage of faults formation. Overwhelming majority of fragile fissures of the study area have sub-vertical drop and two main spreading directions, the first one is sub-parallel to structural-textural elements and the second one is subnormal to them. The field calculated by fissure paragenesis corresponds to the younger Subbotsk-Moshorin stage of fracture formation of the Ukrainian shield.


the Ukrainian shield; the Bug magablock; deformations; strain fields; fracture zones


Geological map and map of minerals of the crystalline basement 1:200 000, 2011. Eds. O. V. Zyultsle, V. P. Kirilyuk. Kiev: Publ. «Pivnichgeologiya» (in Ukrainian).

Geochronology of the Early Precambrian of the Ukrainian Shield. Proterozoic, 2008. Ed. N. P. Scherbak. Kiev: Naukova Dumka, 240 p. (in Russian).

Gintov O. B., 2005. Field tectonophysics and its application for the studies of deformations of the Earth’s crust of Ukraine. Kiev: Feniks, 572 p. (in Russian).

Gintov O. B., 2015. Problems of geodynamics of the Ukrainian shield in Precambrian. Geofizicheskiy zhurnal 37(5), 3—21 (in Russian). doi:

Gintov O. B., Entin V. A., Mychak S. V., 2017. On plotting the scheme of fracture-mega-block tectonics of the Ukrainian Shield in a scale 1:500 000. Geofizicheskiy zhurnal 39(5), 63—82 (in Russian). doi:

Gintov O. B., Orlyuk M. I., Mychak S. V., Bakarzhieva M. I., Farfulyak L. V., 2008. Subbotsko-Moshorinsky stage of the Earth’s crust deformation of the Ukrainian Shield. Geofizicheskiy zhurnal 30(6), 23—38 (in Russian).

Dovgan R. N., Entin V. A., Pavlyuk V. N., 2006. Bandurovsk paleo-volcanic structure and associated diamond prospecting prospects. Mineralni resursy Ukrayiny (4), 22—28 (in Russian).

Entin V. A., 2005. Geophysical base of the Tectonic map of Ukraine at the scale 1:1 000 000. Geofizicheskiy zhurnal 27(1), 74—84 (in Russian).

Lobach-Zhuchenko S. B, Balaganskiy V. V., Baltybaev S. K., Artemenko G. V., Bogomolov E. S., Yurchenko A. V., Stepanyuk L. M., Sukach V. V., 2014. Metasedimentary rocks of the paleoarchean Dniester-Bug Group, Ukrainian Shield: composition, age, sources. Litologiya i poleznyye iskopayemyye (5), 1—18. doi: 10.7868/ S0024497X14050061.

Mychak S. V., 2016. Geodynamic development of the Ukrainian shield and the formation of mineral deposits according to geophysical and geochronological data. Visnyk NAN Ukrayiny (6), 77—85.

Stepanyuk L. M., Dovbush T. I., Kurylo S. I., Zyultsle O. V., Yaskevich T. B., 2017. Uraniumlead age of monazites from biotitic gneisses of the Middle Bug area of the Ukrainian Shield. Mineralogichnyy zhurnal 39(2), 46—56 (in Russian).

Stepanyuk L. M., Kurilo S. I., Somka V. O., Bondarenko S. M., Kovalenko O. O., Dovbush T. I., Vysotsky O. B., 2017. Features of U-Pb isotopic systems of zircon and monazite from granite — «xenolith» rock association: petrologic and geologic consequences. Mineralogichnyy zhurnal 39(1), 63—74 (in Ukrainian).

Stoyanov S. S., 1977. The mechanism of formation of discontinuous zones. Moscow: Nedra, 144 p. (in Russian).

Shevchuk V. V., 2012. Interrelations between autochthnous Proterozoic granite formation and deformation processes in Talniv fault zone (Ukrainian Shield). Visnyk Kyyivskoho natsionalnoho universytetu imeni Tarasa Shevchenka. Heolohiya (56), 5—7 (in Russian).

Shevchuk V., Kravchenko D., Mazko A., Khabanets I., 2013. Pervomayskaya granite-gneiss monocline in the section along river South Bug. Visnyk Kyyivskoho natsionalnoho universytetu imeni Tarasa Shevchenka. Heolohiya (1), 5—8 (in Ukrainian).

Shevchuk V. V., Kuz I. S., Yurchishin A. S., 2002. Tectonophysical fundamentals of structural analysis. Lviv: Ed. Lviv National University, 124 p. (in Ukrainian).

Shevchuk V. V., Lavrenyuk M. V., Kravchenko D. V., 2013b. Fundamentals of structural analysis: Textbook. Kyiv: VPTS «Kyyivskyy universytet», 287 p. (in Ukrainian).

Shcherbakov I. B., 2005. Petrology of the Ukrainian Shield. Lvov: ZUKTS, 366 p. (in Russian).

Yaroshchuk M. A., Dovgan R. N. et al., 1990. Serendibite from the rocks of the Pobuzhsky district of the Ukrainian shield. Mineralogicheskiy zhurnal 12(6), 75—78 (in Russian).

Allmendinger R. W., Cardozo N., Fisher D., 2012. Structural geology algorithms: vectors and tensors. Cambridge University Press, 304 p.

Cardozo N., Allmendinger R. W., 2013. Spherical projections with OSXStereonet. Comput. Geosci. 51, 193—205. doi: 10.1016/j.cageo.2012.07.021.



  • There are currently no refbacks.