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Tectonic evolution of the central part of the Teplá-Barrandian unit
Hajná, Jaroslava ; Žák, Jiří (advisor) ; Schulmann, Karel (referee) ; Nance, Damian (referee)
The principal goal of the thesis is to examine the tectonic evolution of the Teplá- Barrandian unit (TBU) of the central Bohemian Massif from Cadomian subduction and active margin processes, through Cambro-Ordovician extension to Variscan terrane collisions. The thesis is based on extensive field research, detailed structural mapping, and structural analysis, combined with other analytical methods such as the anisotropy of magnetic susceptibility (AMS) coupled with an analysis of magnetic mineralogy, analysis of deformational microstructures, and U, Th and Pb isotope analyses carried out by laser ablation - inductively coupled plasma-mass spectrometry (LA-ICP-MS). The most important conclusions of the thesis are as follows. (1) The Neoproterozoic (Cadomian) basement of the Teplá-Barrandian unit reveals a complex structure and mostly unclear stratigraphic relations of its components. It was proposed that this unit exposes perhaps the best preserved fragment of an accretionary wedge of the whole Avalonian-Cadomian belt, represented by the newly defined Blovice Complex. In the central part of the TBU, this complex consists of three lithotectonic belts differing in style and intensity of deformation, magnetic fabric, and degree of Cadomian regional metamorphism. In addition, the central...
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