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http://hdl.handle.net/2122/13032
Authors: | Barreca, Giovanni* Scarfì, Luciano* Gross, Felix* Monaco, Carmelo* De Guidi, Giorgio* |
Title: | Fault pattern and seismotectonic potential at the south-western edge of the Ionian Subduction system (southern Italy): New field and geophysical constraints | Journal: | Tectonophysics | Series/Report no.: | /761 (2019) | Issue Date: | Jun-2019 | DOI: | 10.1016/j.tecto.2019.04.020 | URL: | https://www.sciencedirect.com/science/article/pii/S0040195119301441 | Keywords: | Subduction system Slab edge tear Active faulting Seismic profiling Earthquakes Calabrian Arc |
Subject Classification: | 04.07. Tectonophysics | Abstract: | The south-western edge of the Calabrian Arc in southern Italy has been investigated throughout a joint analysis of field, marine and geophysical data which provided constraints on the fault pattern and on the seismotectonic potential. The study was focused on a poorly known sector of a larger belt of seismically active faults slicing across the NE corner of Sicily, the so-called Tindari Fault System. Our data pointed out that the investigated area, including the mainland and the Ionian offshore, is deformed by oblique faulting with a general NW-SE tectonic trend. Earthquake distribution and seismic profiles pointed out active deformation in the offshore while the mainland is characterized by the occurrence of a NW-SE oriented,>20 km-long, structural belt. However, scarce seismicity has been recorded in the last 30 years alongside this tectonic structure, accounting for a possible silent segment of the larger fault system. Tomographic images revealed that the Moho discontinuity is deformed by a NE-dipping lithospheric tectonic structure which has been here retained the main mode of deformation and responsible for coseismic displacement in the area. As a whole, field and geophysical data agree with a general NW-SE trend segmented pattern of recent/active faults that have the potentiality of generating magnitude 6.5–7 earthquakes. |
Appears in Collections: | Article published / in press |
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