Results
The seismic images of the Oberpfalz region show a heterogeneous crust with a thickness of about 30 km and strong reflections throughout the entire section. In all NW-SE trending profiles SE-dipping reflections in the middle and lower crusts are prevalent. They confirm an extensive overthrusting of Moldanubian onto Saxothuringian units as was already interpreted from geological observations at the surface.
DEKORP 4N
- NW part, Saxothuringian: increased reflectivity along selected bands in the upper crust (around 4 s TWT), indicative of slightly dipping and sub-horizontal thrusts,
- Central part, boundary zone and KTB site: strong reflective band in the middle crust, representing a prominent overthrust zone of the Moldanubian onto the Saxothuringian,
- SE part, Moldanubian: different dips in the upper and lower crusts with:
- a) NW-dipping reflections within the upper crust, representing either (1) slip faults or (2) thrusts from an indentation or interfingering process,
- b) many SE-dipping reflective bands within the lower crust, indicating a continuation of Moldanubian planes down to the lowermost crust.
DEKORP 4Q
Strong reflectivity in the lower crust, but only weak indications of the steep-angle fault zone of the "Bavarian Pfahl".
KTB 8501 - KTB 8506
- KTB 8501 - KTB 8503 (NE-SW trending, perpendicular to DEKORP 4N, KTB drilling site):
- sediments of the Permo-Carboniferous and younger are offset at the Franconian Line,
- NE-dipping strong reflections northeast of the Franconian Line are related to the Erbendorf Body,
- strong Moho reflections indicate a crustal thickness of about 30 km.
- KTB 8504 - KTB 8506 (NW-SE trending, parallel to DEKORP 4N, KTB drilling site)
- strong reflections from the sedimentary basin west of the Franconian Line,
- SE-dipping reflections, showing a strongly imbricated structure probably related to the Erbendorf Body,
- SE of the KTB drilling site.
