Data Publication

Deep seismic reflection profile DEKORP 1985-4Q across the Bavarian Forest, Southeast Germany

Stiller, Manfred | Kaerger, Lauretta | Agafonova, Tatiana | Krawczyk, Charlotte | Oncken, Onno | Weber, Michael | Former DEKORP Project Leaders | Former DEKORP Research Group | Former DEKORP Processing Centre

GFZ Data Services

(2021)

The 36 km long line 4Q was recorded in 1985 as part of the DEKORP project, the German continental seismic reflection program. The aim of the survey was to explore important tectonic structures through the regional tectonic trend of the Bavarian Forest (NW-SE) with high-fold near-vertical incidence vibroseis acquisition. Details of the experiment, first results and interpretations were published by DEKORP Research Group (1987, 1988). The Technical Report of line 4Q gives complete information about acquisition and processing parameters. The European Variscides, extending from the French Central Massif to the East European Platform, originated during the collision between Gondwana and Baltica in the Late Palaeozoic. Due to involvement of various crustal blocks in the orogenesis, the mountain belt is subdivided into distinct zones. The external fold-and-thrust belts of the Rhenohercynian and Saxothuringian as well as the predominantly crystalline body of the Moldanubian dominate the central European segment of the Variscides. Polyphase tectonic deformation, magmatism and metamorphic processes led to a complex interlinking between the units. The Moldanubian unit contains blocks of pre-Variscan crust and their Palaezoic cover. During the Variscan orogeny the Moldanubian crust was thrust towards the NW over the Saxothuringian foreland. Both units were welded together by a low-pressure metamorphism accompanied by polyphase deformation (DEKORP Research Group, 1987, 1988). The SW-NE striking line 4Q runs perpendicular to the gneisses of the Bavarian Forest at the southwestern margin of the Bohemian Massif, a part of the Moldanubian Zone. In the southwest the profile crosses the NW-SE striking Bavarian Pfahl. The 150 km long quartz vein is a dextral shear zone with cataclastic as well as ductile deformation and extensive quartz mineralization (DEKORP Research Group, 1988). In the northeast DEKORP 4Q intersects the Hoher Bogen, an amphibolitic nappe, belonging to the western margin of the Tepla-Taus-Complex which is marked by an important volume of mafic metamorphic rocks (DEKORP Research Group, 1988). The profile 4Q traverses DEKORP 4N at its northeastern end almost perpendicularly.

Keywords