HR: 1400h
AN: T43A-06    [Abstracts]
TI: Carpathian Collision vs. Andean Subduction in Potential Fields
AU: * Bielik, M
EM: bielik@fns.uniba.sk
AF: Department of Applied and Environmental Geophysics, Faculty of Natural Sciences, Comenius University, Mlynska dolina, Bratislava, 842 15, Slovakia (Slovak Republic)
AU: Tasarova, Z A
EM: tasarova@geophysik.uni-kiel.de
AF: Institut fur Geowissenschaften, Abt. Geophysik, Christian-Albrechts-Universitat zu Kiel, Otto-Hahn-Platz 1, Kiel, 24118, Germany
AU: Goetze, H
EM: hajo@geophysik.uni-kiel.de
AF: Institut fur Geowissenschaften, Abt. Geophysik, Christian-Albrechts-Universitat zu Kiel, Otto-Hahn-Platz 1, Kiel, 24118, Germany
AU: Dererova, J
EM: geofjade@savba.sk
AF: Geophysical Institute of the Slovak Academy of Sciences, Dubravska cesta 9, Bratislava, 845 28, Slovakia (Slovak Republic)
AB: The arcuate Carpathian mountain range extends over a distance of almost 1500 km in Central and Eastern Europe. The Carpathians, together with the Pannonian Basin System, belong to the youngest tectonic units in this region. Their complicated structure is the result of several processes, such as convergence, subduction and plate boundary retreat, slab roll-back, transpressive-transtensive collision and asthenospheric upwelling during the neo-Alpine evolution. The Carpathians are typically divided into several distinctive segments: the Western, Eastern and Southern Carpathians (clockwise from left). The Andes, extending along the western continental margin of South America, are the longest system (~8000 km) of high mountain ranges on Earth. They are the result of the convergence of the oceanic Nazca and Antarctic Plates towards the continental South American Plate. The Andes are characterized by extreme along-strike variations, creating segments variable in width, altitude, climate and age. In this work we focus on the Western Carpathians and the Southern Andes at latitudes of 36 degrees - 42 degrees S. Despite their different evolution, a comparison of these mountain ranges shows some similarities in terms of the geological structures and their gravity anomalies. However, a significant difference of the forearc structure is revealed (Carpathian forearc gravity low versus forearc gravity high of the Andean subduction zone). The structural image of the Andean subduction zone was derived based on the 3-D density modelling, performed as a combined interpretation of the gravity anomalies, seismic and geological data. The model of the Carpathians was obtained using the 2-D integrated geophysical modelling and a preliminary 3-D gravity modelling, based on the results of the CELEBRATION 2000 seismic experiment and other geophysical data available.
DE: 8100 TECTONOPHYSICS
DE: 8108 Continental tectonics: compressional
DE: 8122 Dynamics: gravity and tectonics
DE: 8170 Subduction zone processes (1031, 3060, 3613, 8413)
SC: Tectonophysics [T]
MN: 2007 Joint Assembly