A crustal-scale cross-section through the Tauern Window (eastern Alps) from geophysical and geological data
Published:January 01, 2008
B. Lammerer, H. Gebrande, E. Lüschen, P. Veselá, 2008. "A crustal-scale cross-section through the Tauern Window (eastern Alps) from geophysical and geological data", Tectonic Aspects of the Alpine-Dinaride-Carpathian System, S. Siegesmund, B. Fügenschuh, N. Froitzheim
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A restorable geological cross-section through the entire crust of the Tauern Window is presented. It is drawn from surface geology and seismic data of the TRANSALP vibroseis section using balancing software. The architecture of the window is characterized by three horses in a large duplex structure and folded granitic sills. The duplex was later uplifted along two large faults at its northern rim. The first is a blind fault along the deep-reaching sub-Tauern ramp with a displacement of 17 km. The tip of the hanging wall block wedged underneath the Austroalpine and Penninic nappes and caused a triangle structure. This led to backthrusting and backfolding within the marginal rocks of the window. At the second one, the Tauern North Boundary Fault occurred in our retrodeformation, a throw of c. 3 km. A total shortening of the crust or parts of the crust of c. 60 km in north–south direction led to uplift of the Tauern Window.
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Tectonic Aspects of the Alpine-Dinaride-Carpathian System
The Alps, Carpathians and Dinarides form a complex, highly curved and strongly coupled orogenic system. Motions of the European and Adriatic plates gave birth to a number of ‘oceans’ and microplates that led to several distinct stages of collision. Although the Alps serve as a classical example of collisional orogens, it becomes clearer that substantial questions on their evolution can only be answered in the Carpathians and Dinarides. Our understanding of the geodynamic evolution of the Alpine-Dinaride-Carpathian System has substantially improved and will continue to develop; this is thanks to collaboration between eastern and western Europe, but also due to the application of new methods and the launch of research initiatives. The largely field-based contributions investigate the following subjects: pre-Alpine heritage and Alpine reactivation; Mesozoic palaeogeography and Alpine subduction and collision processes; extrusion tectonics from the Eastern Alps to the Carpathians and the Pannonian Basin; orogen-parallel and orogen-perpendicular extension; record of orogeny in foreland basins; tectonometamorphic evolution; and relations between the Alps, Apennines and Corsica.