GFZ German research centre for geo sciences

Results

DEKORP 3A:

5 zones of characteristic reflectivity patterns (zones I - V) are observerd:

zone I (0-1 s TWT):
poor reflectivity in the upper part of the zone, underlain by an almost 0.2 s wide band of strong reflections
=> layer-cake reflectivity pattern caused by sedimentary sequences,

zone II (1-2 s TWT):
overall reflectivity with patches of weak, short (< 0.5 km) reflections and rippled reflection trains
=> NW-verging herring-bone pattern,

zone III (2-3.5 s TWT):
characterized by a high reflectivity with both sub-horizontal and southward dipping reflectors; sporadic reflection bands
=> crocodile pattern,

zone IV (4-6 s TWT):
generally reduced reflectivity with transparent patches framed above and below by strong reflections,

zone V (6-9 s TWT):
characterized by high reflectivity with seismic lamination; strong reflections extend over 2 to 4 km and show dips up to 20°.

DEKORP 3B:

  • similar zonation and reflectivity patterns as in DEKORP 3A, north of the Phyllite Zone,
  • zone boundaries become more unclear with increasing distance from the axis of the Hessian Depression,
  • strong undulations of the boundary between zones II and III (upper crust) with a general tendency to descend southeastward,
  • missing zonation of the upper crust between profile-km 85 and 105,
  • bands and clusters of strong reflections between profile-km 110 and 140 (Saale-Kraichgau Trough), partly cross-cutting each other, interspersed with transparent patches and associated with strong diffractions,
  • lower crustal lamination with isolated, strong reflection bands with 10 to 20° dips.

MVE-90:

  • relatively poor reflectivity in the upper crust except the bowl-like structures of the Münchberg Gneiss Complex, Vogtland and the Elbe Zone,
  • high reflectivity in the middle crust characterized by flat, lense-like structures with the long axis between 20 and 50 km length,
  • poorly reflective zone in the lower part of the middle crust,
  • high reflectivity in the lower crust, characterized by sub-horizontal to flat reflectors,
  • Moho reflections between depths of 28 to 30 km forming a dome structure in the East Erzgebirge region.
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