Datensatz

Zusammenfassung

The profile 2N was recorded in 1986 as part of the DEKORP project, the German deep seismic reflection program. The seismic survey of the ca. 220 km long line 2N was conducted to investigate the deep crustal structure of the eastern Rhenish Massif and the Muensterland Basin with high-fold near-vertical incidence vibroseis acquisition. The objectives of the survey were to image the Variscan structures in detail with respect to their specific transitions, to obtain evidence about vertical tectonic processes during the Variscan orogenesis, to understand the causes of observed gravity and magnetic anomalies and to recognize and define the Variscan front to the north. In addition, the line contributed to the International Lithosphere Program (ILP) and the former European Geotraverse (EGT). The first outcomes of the survey were presented by Reichert (1988). A detailed description of seismic results is provided by Franke et al. (1990) as well as by DEKORP Research Group (1990) and supplemented by many other researches. The Technical Report of line 2N 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 nearly S-N striking DEKORP 2N line reveals an almost complete cross-section through the Rhenohercynian Zone. The profile runs from the Taunus Mountains, i.e. the southeastern rim of the Rhenish Massif over the Lahn-Dill Trough, through the Ebbe Mountains to the borehole Muensterland 1 in the Muensterland Basin, which belongs to the sub-Variscan Foredeep. The profile is the northern prolongation of DEKORP 2S. Line DEKORP 2Q crosses line 2N perpendicularly in its northern part extending northeastwards to the borehole Versmold 1.