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http://hdl.handle.net/2122/13806
Authors: | Gasperini, Luca* Lazar, Michael* Mazzini, Adriano* Lupi, Matteo* Haddad, Antoine* Hensen, Christian* Schmidt, Mark* Caracausi, Antonio* Ligi, Marco* Polonia, Alina* |
Title: | Neotectonics of the Sea of Galilee (northeast Israel): implication for geodynamics and seismicity along the Dead Sea Fault system | Journal: | Scientific Reports | Series/Report no.: | /10 (2020) | Publisher: | Nature P. G. | Issue Date: | 20-Jul-2020 | DOI: | 10.1038/s41598-020-67930-6 | Keywords: | tectonics fluids geochemistry seismicity helium |
Abstract: | The Sea of Galilee in northeast Israel is a freshwater lake filling a morphological depression along the Dead Sea Fault. It is located in a tectonically complex area, where a N-S main fault system intersects secondary fault patterns non-univocally interpreted by previous reconstructions. A set of multiscale geophysical, geochemical and seismological data, reprocessed or newly collected, was analysed to unravel the interplay between shallow tectonic deformations and geodynamic processes. The result is a neotectonic map highlighting major seismogenic faults in a key region at the boundary between the Africa/Sinai and Arabian plates. Most active seismogenic displacement occurs along NNW-SSE oriented transtensional faults. This results in a left-lateral bifurcation of the Dead Sea Fault forming a rhomb-shaped depression we named the Capharnaum Trough, located off-track relative to the alleged principal deformation zone. Low-magnitude (ML = 3-4) epicentres accurately located during a recent seismic sequence are aligned along this feature, whose activity, depth and regional importance is supported by geophysical and geochemical evidence. This case study, involving a multiscale/multidisciplinary approach, may serve as a reference for similar geodynamic settings in the world, where unravelling geometric and kinematic complexities is challenging but fundamental for reliable earthquake hazard assessments. |
Appears in Collections: | Article published / in press |
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Gasperini et al., 2020ScientReports.pdf | 5.82 MB | Adobe PDF | View/Open |
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