Τίτλος:
Evidence of extensional and strike-slip deformation in the offshore Gökova-Kos area affected by the July 2017 Mw6.6 Bodrum-Kos earthquake, eastern Aegean Sea
Γλώσσες Τεκμηρίου:
Αγγλικά
Περίληψη:
The interpretation of new multichannel seismic profiles and previously published high-resolution swath and seismic reflection data from the Gökova Gulf and southeast of Kos Island in the eastern Aegean Sea revealed new morphotectonic features related to the July 20, 2017 Mw6.6 Bodrum-Kos earthquake offshore between Kos Island and the Bodrum Peninsula. The seafloor morphology in the northern part of the gulf is characterized by south-dipping E–W-oriented listric normal faults. These faults bend to a ENE–WSW direction towards Kos Island, and then extend parallel to the southern coastline. A left-lateral SW–NE strike-slip fault zone is mapped with segments crossing the Gökova Gulf from its northern part to south of Kos Island. This fault zone intersects and displaces the deep basins in the gulf. The basins are thus interpreted as the youngest deformed features in the study area. The strike-slip faults also produce E–W-oriented ridges between the basin segments, and the ridge-related vertical faults are interpreted as reverse faults. This offshore study reveals that the normal and strike-slip faults are well correlated with the focal mechanism solutions of the recent earthquake and general seismicity of the Gökova Gulf. Although the complex morphotectonic features could suggest that the area is under a transtensional regime, kinematic elements normally associated with a transtensional system are missing. At present, the Gökova Gulf is experiencing strike-slip motion with dominant extensional deformation, rather than transtensional deformation. © 2017, Springer-Verlag GmbH Germany, part of Springer Nature.
Συγγραφείς:
Ocakoğlu, N.
Nomikou, P.
İşcan, Y.
Loreto, M.F.
Lampridou, D.
Περιοδικό:
Geo-Marine Letters
Λέξεις-κλειδιά:
Deformation; Earthquakes; Faulting; Geophysics; Seismic waves; Seismology; Strike-slip faults; Tectonics, Extensional deformation; Listric normal faults; Multi-channel seismic; Seafloor morphologies; Seismic reflection data; Strike-slip deformation; Strike-slip motion; Transtensional deformation, Fault slips, deformation; earthquake event; extensional tectonics; normal fault; seismic reflection; seismicity; strike-slip fault; transtension, Aegean Sea; Bodrum; Dodecanese; Gokova Gulf; Greece; Kos [Dodecanese]; Kos [Southern Aegean]; Mediterranean Sea; Mugla; Southern Aegean; Turkey
DOI:
10.1007/s00367-017-0532-4
