Latest Pannonian and Quaternary evolution at the transition between Eastern Alps and Pannonian Basin: new insights from geophysical, sedimentological and geochronological data

摘要: The transition zone between Eastern Alps and Pannonian Basin is a key area for the investigation of interplay regional uplift, local tectonic subsidence depositional environment. Our study area, western margin Little Hungarian Plain, characterized by gentle hills, plateaus depressions, which several are filled lakes—including one Austria’s largest shallowest lakes, Lake Neusiedl. Geological hampered scarcity outcrops, thus direct observation sedimentological or structural features difficult. Despite long research history in consistent landscape evolution model considering all relevant constraints lacking so far. In this study, we apply multidisciplinary methods to decipher complex fluvial region. Local data from shallow-lake drilling seismic combined with industrial seismics core gain new insights into latest (Late Miocene) Quaternary evolution. Shallow-lake show erosionally truncated sediments dipping thickening toward southeast, modern depocenter Plain. Overlying very similar trend except on plateau north lake indicating ongoing major parts basin. Drill cores locations along lines were analyzed concerning their age, mineralogy heavy minerals compared outcrop samples surrounding plains derive indications sediment provenance. A apparent lack significant gravel layer top tilted beneath Small-scale faults can be observed sections sedimentary features. Significant differences current elevation indicate post-Pannonian normal faulting, process shaping present-day morphology Luminescence ages gravels significantly higher (>300 ka) plain (102 ± 11 76 8 ka), suggesting subsidence.