Conference Abstract
| 
06 Sep 2023
Conference Abstract |
| 06 Sep 2023
| 06 Sep 2023
The slip tendency of 3D faults in Germany
Institut für Angewandte Geowissenschaften, KIT, 76131 Karlsruhe, Germany
Steffen Ahlers
Institut für Angewandte Geowissenschaften, TU Darmstadt, 64287
Darmstadt, Germany
Sophia Morawietz
Helmholtz Zentrum Potsdam, Deutsches GeoForschungsZentrum GFZ, 14473
Potsdam, Germany
Institute of Applied Geosciences, TU Berlin, 10587 Berlin, Germany
Birgit Müller
Institut für Angewandte Geowissenschaften, KIT, 76131 Karlsruhe, Germany
Tobias Hergert
Institut für Angewandte Geowissenschaften, KIT, 76131 Karlsruhe, Germany
Karsten Reiter
Institut für Angewandte Geowissenschaften, TU Darmstadt, 64287
Darmstadt, Germany
Andreas Henk
Institut für Angewandte Geowissenschaften, TU Darmstadt, 64287
Darmstadt, Germany
Moritz Ziegler
Helmholtz Zentrum Potsdam, Deutsches GeoForschungsZentrum GFZ, 14473
Potsdam, Germany
Oliver Heidbach
Helmholtz Zentrum Potsdam, Deutsches GeoForschungsZentrum GFZ, 14473
Potsdam, Germany
Institute of Applied Geosciences, TU Berlin, 10587 Berlin, Germany
Frank Schilling
Institut für Angewandte Geowissenschaften, KIT, 76131 Karlsruhe, Germany
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Short summary
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Ershad Gholamrezaie, Magdalena Scheck-Wenderoth, Judith Bott, Oliver Heidbach, and Manfred R. Strecker
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Based on geophysical data integration and 3-D gravity modeling, we show that significant density heterogeneities are expressed as two large high-density bodies in the crust below the Sea of Marmara. The location of these bodies correlates spatially with the bends of the main Marmara fault, indicating that rheological contrasts in the crust may influence the fault kinematics. Our findings may have implications for seismic hazard and risk assessments in the Marmara region.
Moritz O. Ziegler, Oliver Heidbach, John Reinecker, Anna M. Przybycin, and Magdalena Scheck-Wenderoth
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Subsurface engineering relies on sparsely distributed data points of the stress state of the earth's crust. 3D geomechanical--numerical modelling is applied to estimate the stress state in the entire volume of a large area. We present a multi-stage approach of differently sized models which provide the stress state in an area of interest derived from few and widely scattered data records. Furthermore we demonstrate the changes in reliability of the model depending on different input parameters.
T. Hergert, O. Heidbach, K. Reiter, S. B. Giger, and P. Marschall
Solid Earth, 6, 533–552, https://doi.org/10.5194/se-6-533-2015, https://doi.org/10.5194/se-6-533-2015, 2015
Short summary
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A numerical model integrating the structure and mechanical properties of a sedimentary sequence in the Alpine foreland is presented to show that topography, tectonic faults and, most of all, spatialy variable rock properties affect the state of stress at depth. The tectonic forces acting on the sequence are primarily taken up by the stiff rock units leaving the weaker units in a stress shadow.
K. Reiter and O. Heidbach
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K. Fischer and A. Henk
Solid Earth, 4, 347–355, https://doi.org/10.5194/se-4-347-2013, https://doi.org/10.5194/se-4-347-2013, 2013
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Stress data predicted by a geomechanical–numerical model are mapped onto 3D fault geometries. Then the slip tendency of these faults is calculated as a measure of their reactivation potential. Characteristics of the faults and the state of stress are identified that lead to a high fault reactivation potential. An overall high reactivation potential is observed in the Upper Rhine Graben area, whereas the reactivation potential is quite low in the Molasse Basin.
Stress data predicted by a geomechanical–numerical model are mapped onto 3D fault geometries....
