@phdthesis{Seidel2019,
  author    = {Elisabeth Seidel},
  title     = {The Tectonic Evolution of the German offshore area, as part of the Trans-European Suture Zone (North and East of R{\"u}gen Island). Preparation for a 3D-modelling of the southern Baltic Sea, USO project.},
  journal    = {Die tektonische Entwicklung des deutschen Offshore Gebietes, als Teil der Transeurop{\"a}ischen Suturzone (n{\"o}rdlich und {\"o}stlich der Insel R{\"u}gen). Vorbereitung eines 3D-Modells der s{\"u}dlichen Ostsee, USO-Projekt.},
  url       = {https://nbn-resolving.org/urn:nbn:de:gbv:9-opus-30332},
  pages     = {239},
  year      = {2019},
  abstract  = {The southern Baltic Sea embodies an incomparable geological archive of the tectonic evolution of the 450 Ma old Trans‐European Suture Zone (TESZ). This WNW to NW trending suture formed during the collision of Baltica and Avalonia and has accommodated the repeatedly changing stress regimes since then, as evidenced by numerous fault zones and systems. The German offshore part in the vicinity of R{\"u}gen Island is strongly block‐faulted, with each block showing a specific geological pattern, enabling the reconstruction of the structural evolution of the area. The work of this thesis is part of the USO working group of the University of Greifswald and the Geological Survey of Mecklenburg‐Western Pomerania, which aims to build a unified three‐dimensional tectonic model of the southern Baltic Sea area. This thesis presents the results of new structural investigations of the Arkona, Wolin and Gryfice blocks north and east of R{\"u}gen. Especially, conflicting structural analyses in the previous work are united into a consistent model. The integrated interpretation of 144 reprocessed seismic vintage lines (original Petrobaltic data) and 23 high resolution academic seismic sections (from the Universities of Hamburg and Bremen), with additional consideration of on‐ and offshore wells, revealed 19 seismostratigraphic horizons that subdivide the succession between the Proterozoic basement and the Upper Cretaceous. Up to 100 faults of superior fault zones and systems control the tectonic situation. Besides NW trending deep faults formed during the Palaeozoic, for instance the Wiek and Nord Jasmund faults, and NNW trending Mesozoic faults and flexures that belong to the Western Pomeranian Fault System, other major faults such as the Adler‐Kamień Fault Zone document the polyphase evolution of this area. The restoration of selected seismic sections support the evaluation of separately generated faults and their reactivation, leading to a subdivision of the tectonic evolution of the area into six stages: (1) The Caledonian Orogeny (Ordovician/Silurian) was accompanied by a NE‐SW compression, resulting in the formation of the TESZ and an accretionary wedge within the upper crust. (2) The following S to SW trending extension of the Variscan Foreland (Devonian/Carboniferous) triggered the evolution of the Middle Devonian Old Red R{\"u}gen Basin south of the Wiek Fault. Further WNW to NW trending faults (e.g. Nord Jasmund Fault) subdivided the basin. (3) The advancing Variscan Orogeny (Late Carboniferous) caused an increasing NE‐SW orientated compression and subsequently reactivated faults and tilted blocks (e.g. Lohme Sub‐block). (4) The North German Basin and Mid Polish Trough formed by thermic subsidence in the S to SE of the research area during the Permo‐Carboniferous. Simultaneously, the evolution of the Gryfice Graben as part of the Teisseyre‐Tornquist Zone commenced. (5) Due to the Arctic‐North Atlantic Rifting an E‐W trending extension increased. Consequently, grabens such as the Gryfice Graben continued their subsidence. As the stress system rotated counter‐clockwise, the shear strength increased along the NE trending faults. The Western Pomeranian Fault System developed due to intense transtension during the Keuper and Jurassic, and is characterised by pull‐apart structures. (6) In the Upper Cretaceous, a NE‐SW compression, forced by the Africa‐Iberia‐Europe convergence, triggered the reactivation of faults and flexures as reverse ones, the inversion of grabens (e.g. Gryfice Graben), and the formation of anticlines, for instance at the Wolin Block. This thesis combines the calculation of gridded time structure maps and a detailed fault pattern analysis, and represents the base for a velocity‐ and subsequently depth‐based 3D modelling.},
  language  = {en}
}