Abstract: The Preneogene Basement in the Slovak Part of the Vienna Basin - Possibility of the Seismic Interpretation

OSTROLUCKY PETER, BOZENA SALYOVA and EDUARD RALBOVSKY

The Vienna Basin originated in Neoalpine Orogen on the boundary of Eastern and Western Alps and Western Carpathians. Three principal structural levels can be distinguished from the geological point of view:

The upper level, represented by tectonically disturbed Miocene sediments

The middle level, formed by folded units of Alpine-Carpathian orogen overthrusted on the southeast slopes of the Bohemian Massif.

The lower level, represented by deeply submerged SE slopes of the Bohemian Massif. The Preneogene Basement of the Vienna Basin is created by the middle and lower levels.

Geological structure of the Mesozoic units is considerably complicated due to long distance of thrusting the nappes of the Flysh Belt and Calcareous Alpine units. Interpretation of the deep seismic indications is not to be considered as a fully hypothetical value. Besides seismic profiles of very good quality we need well logs, lithologic and petrophysical data to be able to solve complicated structures of Mesozoic and Paleogene units which have specific images, features and character. In some cases seismic profiles demonstrate beautiful features: sigmoidal bodies of the Glinzendorf series, thrust fronts of nappes,et cetera. The surface of the Calcareous Alps units is easily identified by strong continous reflection. The Glinzendorf Syncline as well as the Goller, the Schneeberg and Frankenfels-Lunz Nappe systems can be distinguished on some profiles by their characteristic features which are typical for each of them (reflection image of the units, thickness of Hauptdolomite block in the Goller Nappe) which is documented on the poster.

AAPG Search and Discovery Article #90942©1997 AAPG International Conference and Exhibition, Vienna, Austria