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http://hdl.handle.net/2122/8793
Authors: | Barba, S.* Finocchio, D.* Sikdar, E.* Burrato, P.* |
Title: | Modeling the interseismic deformation of a thrust system: seismogenic potential of the Southern Alps | Journal: | Terra Nova | Series/Report no.: | 3/25 (2013) | Publisher: | Wiley-Blackwell | Issue Date: | 4-Mar-2013 | DOI: | 10.1111/ter.12026 | URL: | http://onlinelibrary.wiley.com/doi/10.1111/ter.12026/abstract | Keywords: | interseismic deformation Montello thrust Southern Alps |
Subject Classification: | 04. Solid Earth::04.04. Geology::04.04.01. Earthquake geology and paleoseismology 04. Solid Earth::04.04. Geology::04.04.06. Rheology, friction, and structure of fault zones 04. Solid Earth::04.04. Geology::04.04.09. Structural geology |
Abstract: | This article focuses on the Montello thrust system in the Eastern Southern Alps as a potential seismogenic source. This system is of particular interest because of its lack of historical seismicity. Nevertheless, the system is undergoing active deformation. We developed a finite-element model using visco-elasto-plastic rheology. The free parameters of the model (essentially, the locking status of the three thrusts included in the study), were constrained by matching the observed horizontal GPS and vertical levelling data. We show that the amount of interseismic fault locking, and thus the seismic potential, is not necessarily associated with the fastest-slipping faults. More specifically, the locked Bassano thrust has a greater seismic potential than the freely slipping Montello thrust. The findings suggest that faults with subtle evidence of Quaternary activity should be carefully considered when creating seismic hazard maps. |
Appears in Collections: | Article published / in press |
Files in This Item:
File | Description | Size | Format | |
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Barba_&_2013_TN-accepted.pdf | Accepted manuscript | 814.52 kB | Adobe PDF | View/Open |
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