Article (Scientific journals)
Active faulting at the western tip of the Gulf of Corinth, Greece, from high-resolution seismic data
Beckers, Arnaud; Hubert, Aurelia; Beck, Christian et al.
2015In Marine Geology
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Keywords :
Corinth rift; Offshore fault; Strike-slip fault; Normal fault; seismic reflection; triple junction; extension; seismic hazard
Abstract :
[en] The Gulf of Corinth is one of the fastest-spreading intra-continental rifts on Earth. GPS data indicate that the rift is currently opening in a NNE-SSW direction, with a rate of extension reaching up to 16 mm yr-1 in its westernmost part. Although the rest of the offshore rift has been well studied, the western tip of the rift is still poorly explored. We present an accurate map of submarine faults in this area based on two high-resolution seismic reflection surveys (single channel sparker). In the eastern part of the studied area, the sedimentary infill is affected by the known North Eratini, South Eratini and West Channel faults. Further to the west, the seafloor is mostly flat, and is bounded to the north by the normal, south-dipping, Trizonia fault. To the north, the shallower part of the Gulf shows to the east a diffuse pattern of normal and strike-slip deformation which is replaced to the west by a 7.5 km long SE striking strike-slip fault zone, called the Managouli fault zone. To the westernmost tip of the Gulf, in the Nafpaktos Basin, two fault sets with different strikes are encountered; the one with aNE-SW strike exhibits a clear strike-slip component. The western tip of the Gulf of Corinth is the only part of the Corinth Rift where convincing evidence for strike-slip movement has been found. This fault pattern is likely related to the complex deformation occurring at the diffuse junction at the western tip of the Rift between three crustal blocks: Continental Greece, Peloponnese, and the Ionian Island-Akarnia block.
Disciplines :
Earth sciences & physical geography
Author, co-author :
Beckers, Arnaud ;  Université de Liège - ULiège > Département de géographie > Géomorphologie et Géologie du Quaternaire
Hubert, Aurelia  ;  Université de Liège - ULiège > Département de géographie > Géomorphologie et Géologie du Quaternaire
Beck, Christian
Bodeux, Sarah
Tripsanas, Efthymios
Sakellariou, Dimitris
De Batist, Marc
Language :
English
Title :
Active faulting at the western tip of the Gulf of Corinth, Greece, from high-resolution seismic data
Publication date :
2015
Journal title :
Marine Geology
ISSN :
0025-3227
eISSN :
1872-6151
Publisher :
Elsevier Science, Amsterdam, Netherlands
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 20 November 2014

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