THE MORPHOSTRUCTURE OF THE ADJACENT AREAS OF THE EAST-EUROPEAN AND WEST-ARCTIC PLATFORMS AS A MARKER OF THE HORIZONTAL MOVEMENTS OF THE EARTH’S CRUST

The problem of the detecting of horizontal component of neotectonic motions is being investigated on the base of comparison of morphostructure of the region near boundary of the East-European and West-Arctic platforms and structural pattern of the fracture of separation. In the region of the margin part of the East-European platform one can see large Pribelomorian depression of lens shape. Because we could not explain it origin only by erosion, we can consider it to be of neotectonic predetermination. It’s surrounds by uplifted during neotectonic period parts of the platform. The part of this margin between Pribelomorian depression and West-Arctic platform is forming the curve belt, conformal to the margin of the depression and bends as the ledge in less consolidated rocks of  the West-Arctic platform. In front of the ledge in this platform, one can see the uplifts, that can be consider as the evidence of compression in the front of indenter. Near the opposite (Karelian) part of the depression one can see similar and symmetrical situation, that expressed by the difference in lake distribution.

The boundary of the depression, uplifts, discontinuities between basements of different rigidity, are underline by tectonic zones, shapes in relief.

 The distribution of morphostrucrures can be associated with the structural pattern of the large fracture of separation (zone of extension), producing by horizontal motions of borders. Possibly it develops in inherit way. The compressional fields with main axe extended along depression, are well known by independent methods. The natural situation is illustrates by modeling with clay.

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