DOI: https://doi.org/10.24028/gzh.0203-3100.v38i4.2016.107802

Velocity divisibility of the mantle beneath the Ukrainian shield

T. A. Tsvetkova, I. V. Bugaenko, L. N. Zaets

Abstract


Within the limits of three-dimensional Tailor approximation P-velocity model of the mantle under the Ukrainian shield it has been shown that the mantle under it, according to its velocity characteristics, can be subdivided into 3 domains: the Western, the Central and the Eastern ones. The Volynian and Podolian mega-blocks belong to the Western domain, the Central domain includes the Ross, the Bug, the Ingul mega-blocks and the western part of the Middle-Dnieper mega-block limited by the Derezovata fault system and the Eastern domain includes the eastern part of Middle-Dnieper mega-block and the Peri-Azovian mega-block. This division remains for the interval 50—500 km of the upper mantle, its transitional zone, and restores at the depths 700—800 km of the splitting zone 1. The mentioned division is substantiated by the connection at the depth of 100—250 km of the mantle under the USh with velocity structures of the Sarmatian segment of East European Platform; at the depths of 350—600 km by the connection with velocity structures of the mantle under the Black Sea; at the depths of 700—800 km the connection of velocity structures of the Sarmatian segment of East European Platform and the western part of the Black Sea restores.


Keywords


seismotomography; P-velocity model; the mantle; the Ukrainian shield

References


Burakhovich T. K., Nikolaev I. Yu., Sheremet E. M., Shirkov B. I., 2015. Geoelectric anomalies of the Ukrainian shield and their relation to mineral deposits. Geofizicheskiy zhurnal 37(6), 42—63 (in Russian).

Geyko V. S., Tsvetkova T. A., Shumlyanskaya L. A., Bugaenko I. V., Zaets L. N., 2005. Regional 3D P-velocity model of the mantle of Sarmatia (south-west of the East European Platform). Geofizicheskiy zhurnal 27(6), 927—939 (in Russian).

Geyko V. S., Shumlyanskaya L. A., Bugaenko I. V., Zaets L. N., Tsvetkova T. A., 2006. Three-dimensional model of the upper mantle of Ukraine at times P-wave. Geofizicheskiy zhurnal 28(1), 3—16 (in Russian).

Gintov O. B., 2005. Field Tectonophysics and its Application in the Crustal Deformation Study of Ukraine. Kiev: Feniks, 572 p. (in Russian).

Gintov O.B., Pashkevich I.K. 2010. Tectonophysical analysis and geodynamic interpretation of three-dimensional geophysical model of the Ukrainian Shield. Geofizicheskiy zhurnal 32(2), 3—27 (in Russian).

Yentin 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).

Mukhametov R.G., 1977. Task of handing two-dimensional Riemannian metric integral geometry. Doklady AN SSSR 32, 32—45 (in Russian).

Pushcharovskiy Yu. M., Pushcharovskiy D. Yu., 2010. Geology Earth's mantle. Moscow: Geos, 138 p. (in Russian).

Sollogub V.B., 1986. Lithosphere of the Ukraine. Kiev: Naukova Dumka, 184p. (in Russian).

Trubitsin V. P., 2010. Nature border between the upper and lower mantle and its influence on convection. Fizika Zemli 19(6), 2—18 (in Russian).

Khain V. E., 2001. Tectonics continents and oceans. Moscow: Nauchnyy Mir, 604 p. (in Russian).

Khain V. E., Lomidze M.G., 2005. Geotectonics with the Fundamental of Geoddynamics. Moscow: KDU, 560 p. (in Russian).

Tsvetkova T. A., Bugaenko I. V., 2012. Seismic tomography of mantle beneath the East European Platform: mantle velocity boundaries. Geofizicheskiy zhurnal 34(5), 161—172 (in Russian).

Shumlanskaya L. A., 2008. Mantle blocks and zones of increased permeability of the Ukrainian shield. Geofizicheskiy zhurnal 30(2), 135—144.

Shumlyanskaya L.A., Tripolskiy A.A., Tsvetkova T.A. 2014. Crustal velocity structure effects on the results of seismic tomography of the Ukrainian Shield. Geofizicheskiy zhurnal 36(4), 95—117 (in Russian).