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Contrasting tectonic styles of the western and eastern parts of the Western Carpathian Klippen Belt in Slovakia based on magnetotelluric sounding of deep tectonic structures

Bezák Vladimír, Vozár Ján, Majcin Dušan, Klanica Radek, Madarás Ján

Geological Quarterly

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2021

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Vol. 65, No. 2

art. no. 25

EN

To characterize the deep structure of the Klippen Belt, we made magnetotelluric measurements in profiles across the western and eastern segments in the territory of Slovakia, from which we created 3D models. The models revealed significant differences in tectonic structure between these segments. In the western segment, the Klippen Belt is located in the southern reversing wing of the original subduction flower structure (retroarc thrusting) with an overthrust to the south onto the Inner Western Carpathian units. This structure was later modified by significant transpressional movements. In the eastern segment, the Klippen Belt is primarily an organic part of the accretionary wedge of the Outer Western Carpathians and it is overthrusted onto the Flysch Belt. This was followed by modification of the structures, mostly in a transpressional regime, including local reversing overthrusts and the development of a steep fault boundary, mainly along the southern margin, against the Inner Carpathian Paleogene succession. These differences between the structure of the western and eastern Klippen Belt segments indicate the contrast between the interaction of the western and eastern parts of the Inner Western Carpathians with the European Platform. In the western part, oblique collision and sinistral transpression dominate. In the eastern part, by contrast, subduction and orthogonal collision dominated over later transpressional modifications.

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Od dryfu kontynentów Alfreda Wegenera do tektoniki płyt

Jurewicz E.

Przegląd Geologiczny

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2015

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Vol. 63, nr 11

1266--1271

EN

The modern theory of plate tectonics has been the basis of works of several generations of geologists and geophysicists. One of them was Alfred Wegener and his theory of continental drift. The imperfection of the theory (lack of any explanation for the mechanism of continents movement) was the driving force for further studies. The most important ones were the detailed recognition of the ocean floor, and the discovery of the rift and subduction zones.

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Non-extensivity analysis of seismicity within four subduction regions in Mexico

Valverde-Esparza S., Ramirez-Rojas A., Flores-Marquez E., Telesca L.

Acta Geophysica

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2012

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Vol. 60, no. 3

833-845

EN

The non-extensivity approach based on the Tsallis entropy has been applied to seismicity that occurred from 1988 to 2010 along the Mexican South Pacific coast. We analyzed four different regions, characterized by different subduction patterns. Our results indicate a possible correlation between the non-extensive parameters and the seismicity pattern associated with the inclination angle of each subduction region.

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Geodynamic evolution of the Tatra Mts. and the Pieniny Klippen Belt (Western Carpathians) : problems and comments

Jurewicz E.

Acta Geologica Polonica

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2005

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Vol. 55, no. 3

295-338

EN

The geodynamic evolution of the Pieniny Klippen Belt (PKB) and the Tatra Mts. assumes that: The Oravic-Vahic Basin developed due to Jurassic rifting processes with thinned continental crust. The oblique rift without rift-related volcanism had probably a WSW-ENE course. Late Cretaceous thrust-folding of the Choč, Križna and High-Tatric nappes took place underwater and at considerable overburden pressure (ok. ~6-7 km). The geometry of the structures was strongly disturbed by pressure solution processes leading to considerable mass loss. Nappe-folding in the PKB was connected with the slow and flat subduction of thinned continental crust of the Vahicum-Oravicum under the northern margin of the Central Carpathians Block.In the Tatra Mts. and the PKB, the nappe thrust-folding was influenced by a strike-slip shear zone between the edge of the Central Carpathians and the PKB and caused e.g. the counter-clockwise rotation of the Tatra block and relative changing directions of thrusting. The consequence of Miocene oblique subduction and subsequent collision of the North-European continental crust with the Central Carpathian Block was the activation of NNW-SSE deep fault zones. With one of these - the Dunajec Fault - were connected en echelon shears trading on the andesite dykes swarm. Miocene collision caused the disintegration of the Central Carpathian Block into individual massifs and their rotational uplift. The value of rotation around the horizontal axis for the Tatra Massif is estimated at ~40°.

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The interaction of mantle convection and elastic lithosphere

Czechowski L.

Acta Geophysica Polonica

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2000

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Vol. 48, nr 4

417-422

EN

The interaction of the elastic lithosphere and mantle convection is investigated and a new numerical approach is presented. The developed model takes into account an elastic lithospheric plate as well as viscous mantle elsewhere. A better agreement of the calculated and observed inclination of the Wadati-Benioff zones is achieved.