East European platform

The purpose of the presented work was to model the electrical conductivity distribution in the northwestern part of the Ukrainian shield and to study the relationship of geoelectric anomalies with natural mineral deposits and with signs of possible tectonic activation of long-lived fault systems on the Shield. The methodology was based on long-period magnetotelluric and magnetovariational measurements in the period range of 3-16 to 2500-3600 s.

The results of mobile small aperture arrays application for control of geological state stability in time of atomic power plants construction in Leningrad and Nizhniy Novgorod regions are presented.

The results of one-dimensional inversion of generalized curves of magneto-telluric and magneto-variational soundings in south-western region of the East European platform are shown. Existence of a conductive layer at depths exceeding 600 km is confirmed in large parts of Ukraine and Belarus. The resistance of upper mantle within the territory of Belarus at depths of 250-400 km is about 2 times lesser than in Ukraine, and is about 20 Ohmm in Belarus and 50 Ohmm in Ukraine. 

Results of paleomagnetic studies of Lower Devonian sedimentary gray and red rocks from the south-west of Ukraine (the Dniester River basin) are presented. Samples are gray argillite limestones and dolomites of Tiverian series and red argillite and sandstones of Dniester series. Time scale is comparable to Lochkovian of international geologic time scale. Stable palaeomagnetic components of the most samples show remagnetization of rocks (Permian pole, Φ=45°S, Λ=340°E, dp/dm=2°/5° for Tiverian and Φ=47°S, Λ=351.5°E, dp/dm= =0.8°/1.5° for Dnistrovian series).