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H. Häusler, J. Scheibz, W. Chwatal, F. Kohlbeck:
"Coeval Lower Miocene subsidence of the Eisenstadt Basin and relative updoming of its Austroalpine frame: implications from high‑resolution geophysics at the Oslip section (Northern Burgenland, Austria)";
International Journal of Earth Sciences (Online), 1 (2014), 20 pages.

A fault system southeast of Eisenstadt was investigated with high-resolution geophysics using electric resistivity tomography, seismics and gravimetry. The St. Margarethen Fault separates the Neogene succession of the Eisenstadt Basin from the north south-trending Rust Range, which belongs to the Austroalpine frame. The interpretation of profiles down to a depth of 350 m derived from reflection and refraction seismics combined with the density model along the Oslip road section clearly reveals a listric fault, which dips westward towards the Eisenstadt Basin. Bed thickness of growth-strata regularly increases from west to east, and normal fault drags visible in the seismic profile west of the St. Margarethen Fault allow for interpreting this structure as a hanging-wall syncline. Thickness distribution of Neogene deposits reveals that the Eisenstadt Basin can be interpreted as a half-graben bounded by the listric St. Margarethen normal fault, which developed at the western flank of Rust Range. The subsidence of the Eisenstadt Basin during Lower to Middle Sarmatian times was accompanied by concurrent updoming of the Rust Range of at least 70 m. For the mechanism of the updoming of the Rust Range footwall uplift during hanging wall subsidence is inferred.

Geophysics, Listric St. Margarethen Fault, Neogene Eisenstadt Basin, Rust Range, Coeval subsidence and updoming

http://dx.doi.org/10.1007/s00531-014-1084-8

http://publik.tuwien.ac.at/files/PubDat_232870.pdf

Project Head Harald Schuh:
VPM - Kooperation