[MITTEILUNGEN der ÖSTERREICHISCHEN GEOLOGISCHEN GESELLSCHAFT] AUSTRIAN JOURNAL of EARTH SCIENCES an INTERNATIONAL JOURNAL of the AUSTRIAN GEOLOGICAL SOCIETY

Mapping of active capable faults by high-resolution geophysical methods: examples from the central Vienna Basin Complementary high-resolution geophysical methods (seismics, GPR with different centre frequencies, resistivity) are applied for mapping the active Markgrafneusiedel Fault in the Vienna Basin. Mapping focussed on a morphological fault scarp forming the SE boundary of the Middle Pleistocene Gänserndorf Terrace 20 km NE of the centre of Vienna. Seismic and GPR data highlight reflectors, which terminate below the morphological break of the fault scarp and thus image a fault, which dips with 55-60 ° to the southeast. The fault is traced from about 200 m depth up to the surface by combining reflection seismics, 40 MHz GPR data imaging the depth interval between 3 and 15 m, and 500 MHz GPR data depicting the uppermost metres. Data show an emergent fault, which clearly offsets the Pleistocene sediments. The fault is found in all sections crossing the scarp. It may be associated with a colluvial wedge depicted by the high-resolution GPR data. The location of the fault below the morphological scarp is confirmed by resistivity data, which is used to support GPR interpretations, and by a free-air gravity anomaly indicating thick unconsolidated Quaternary sediments in the hangingwall of the normal fault. Eine Kombination von hochauflösenden geophysikalischen Methoden (Seismik, Georadar, Geoelektrik) wird für die Kartierung de