Hochauflösende Seismostratigraphie des oststeirischen Beckens und der Senke von Weichselbaum unter besonderer Betrachtung der Hydrogeologie (Miozän, Österreich)
Research output: Thesis › Doctoral Thesis
For the Styrian Basin a sequence stratigraphic framework is presented. The Karpatian to Pannonian succession is subdivided into seven 3rd order sequences. Karpatian 3rd order sequence KAR-1 is poorly defined in the study area. The Badenian is subdivided into three 3rd order sequences (BAD-1 to BAD-3). In the northern Fürstenfeld Subbasin, BAD-1 to BAD-3 include three prograding deltaic complexes. Seismic facies of the HST of BAD-3 in the central Fürstenfeld Subbasin suggest the northward progradation of corallinacean limestone. A major drop in relative sea level of at least 50 to 80m is recorded at the Badenian/Sarmatian boundary in the northern Fürstenfeld Subbasin. The Sarmatian (SAR-1) is subdivided into five 4th order sequences. Erosional surfaces are recognized at the top of SAR-1.4 and SAR-1.5. This indicates major drops in relative sea level during Late Sarmatian times and at the Sarmatian/Pannonian boundary. The depth of incised valleys indicates relative sea level falls of about 50 m during both events. The Pannonian succession in the Styrian Basin includes two 3rd order sequences (PAN-1 and PAN-2). PAN-1 is subdivided into two, PAN-2 into six 4th order sequences. The MFS of PAN-2.6 is correlated with the MFS of PAN-2, dated as 9.03 Ma in the Pannonian Basin. Lithofacies properties can be derived from the sequence stratigraphic classification of Neogene rocks in the Styrian Basin, and therefore optimal positions for new groundwater wells can be predicted seismically.
|Translated title of the contribution||High resolution sequence stratigraphy in the Eastern Styrian Basin and the Weichselbaum Graben with regard to the hydrogeology (Miocene, Austria)|
|Publication status||Published - 2007|