Teplotní a mechanické aspekty mechanizmů pohřbení a exhumace v moldanubickém orogenním kořeni na Jižní Moravě a v Dolním Rakousku

Racek, Martin

This thesis repÍesents results of petrological and stuctural investigations at the eastem margin of the Bohemian Massif. The main objective is the understanding of mechanical and thermal aspects of the formation and exhumation mechanisms of the Moldanubian orogenic root domain. The studies has been carried at the south-eastem margin of the Moldanubian zone in Lower Aushi4 at the contact with the Brunia basement and are presented in the frame of recently developed new concept of lower crust exhumation by vertical extrusion. The first part (Chapter 1-3) shows results of detailed structural mapping combined with petrological study and thermodynamical modeling of the metamorphic processes. Chapters I and 2 are concerned with the area around the Drosendorf window (Moldanubian domain, South Moravia and Lower Austria). The Chapter I deals with detailed petrological investigation of individual structwes in the E-W profile going from high-grade rocks of the Gftihl unit across the Drossendorf window to the Brunia basement. The petrological investigation shows existence of an internal domain (the Drosendorf window) composed of predominantly metasedimenatry rocks of mid-crustal origin that preserve a prograde metamorphism up to 8 kbar. This unit is surrounded by lower crustal rocks with peak metamorphic...

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