The Złoty Stok-Trzebieszowice regional shear zone: the boundary of terranes in the Góry Złote Mts. (Sudetes)

Authors

  • Zbigniew Cymerman Lower Silesian Branch, Polish Geological Institute al Jaworowa 19, PL-53-122 Wrocław

Abstract

The paper presents the results of structural and kinematic analysis of northern part of the Góry Złote Mts. (Sudetes, SW Poland), where the Złoty Stok-Skrzynka tectonic zone is known to occur; at present, the zone has been redefined as the Złoty Stok-Trzebieszowice shear zone. In general, the zone has Ne-SW attitude and runs from the Trzebieszowice environs to the Złoty Stok region in a form of a belt up to 4 km wide. Domination of simple (rotational) shear mechanisms under ductile (plastic-crystalline) conditions was proven to take place here; it should be noticed that stages of dynamic recovery and dynamic recrystallization were variable. Ductile sinistral displacements within this zone caused displacement of overlying rock packages towards SSW, the displacement took place under the conditions of sinistral transpression which is similar to the situation of sinistral shear zone at Niemcza, located further northwards. Development of the zone under discussion is considered to be closely connected with an oblique collision of two terranes: the Moldanubicum one including the Śnieżnik metamorphic complex and the Central Sudetian one including the zone under consideration which makes up its most peripheral southwestern part. It was the Variscan orogeny (Upper Devonian-Lower Carboniferous) during which the collision happened and caused a sinistral transpression in this part of the Sudetes.

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Published

2013-02-13

Issue

Vol. 40 No. 1 (1996)

Section

Articles

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