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Structure of the North Eastern Pannonian Basin, Romania, a Review
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 11th Congress of the Balkan Geophysical Society, Oct 2021, Volume 2021, p.1 - 5
Abstract
This short review is focused on the understanding of the structure and evolution of the NE Pannonian Basin realm, Romania by integrating outcrop geology with geophysics data (gravity, magnetics and seismic). The Pannonian Basin open during Middle Miocene-Pliocene times as a back-arc of the Carpathians and Dinarides orogens. The extension produced several asymmetric sub-basins separated by highs, some of them made by metamorphic basement, like Codru, Ticau, Mezes and Preluca. We interpret that the metamorphic basement has been uplifted in the present-day position in the footwall of major extensional detachments which generated the accommodation space for the Neogene sediments. The basins and the highs are clearly evidenced by the Bouger gravity map, the basins are contoured by local gravity lows of up to 15–20 mGal, like in the case of the Miresu Mare Depression. The extensional system and the Neogene magmatic arc are cross-cut by a large left-lateral strike-slip fault system the Bogdan Voda Dragos Voda with a Middle Miocene horizontal displacement of around 25 km. This Middle Miocene deformation is well correlated with the emplacement of the Subcarpathian Nappe over the foreland platform and accommodates differences in shortening across the Carpathian Orogen.