Geophysical Journal | 2016 volume 38 5

Kinematic evolution of the Pieniny Klippen Belt in Cenozoic (Ukrainian Carpathians)

© A.V. Murovskaya, M.V. Nakapelyukh, Yu.M. Vikhot, V.E. Shlapinskiy, I.N. Bubnyak, S.V. Mychak, 2016

The data on surface, subsurface and deep structure of the Pieniny Klippen Belt (PKB) have been summarized and new results of its geological-structural and fault kinematic studies within the Ukrainian part of the Eastern Carpathians have been presented. In its contemporary appearance as a narrow strongly tectonized zone between the Outer Carpathians and Trans-Carpathian trough PKB was formed in Oligocene-Miocene in the place of ancient ocean. On the surface it is situated within the rootless Pieniny nappe and in the deep it is a steeply dipping deformation zone which developed under compression, simple dextral strike-slip, transtension and transpression. Mesostructures of horizontal shortening and vertical elongation, thrusts and thrust- related folds as well as structures of lateral extrusion - dextral strike-slip along sub-meridional slicken-sides correspond to SW-NE 220 trending compression and correlate with the stage of Alcapa microplate progression in NE direction in Oligocene-Early Miocene. In Early Miocene as a result of counter-clockwork rotation of Alcapa dextral strike-slip deformation is concentrated in boundary zone between Alcapa and accretionary prism of the Ukrainian Flysch Carpathians. The stress fields of strike-slip type with orientation of compression axis SE 165- SW 215 and its "rotation" in a zone of simple shear correspond to this stage. Present deformation regime is characterized as transpressure with SW-NE orientation of compression axis.

Key words: Ukrainian Carpathians, Pieniny nappe, Pieniny Klippen belt, kinematic analysis, stress field, deformational regime.

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