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 Ohmm in Belarus and 50 Ohmm in Ukraine.
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