Moho topography beneath the Corinth Rift area (Greece) from inversion of gravity data
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In this paper, the results of a gravity inversion analysis in the region of the Corinth and Evvia rift system were compared with those obtained independently from teleseismic tomography and receiver function analyses.Abstract:
SUMMARY Our aim is to understand better the rifting process by imaging the Moho depth variation beneath Corinth and Evvia. We present here the results of a gravity inversion analysis in the region of the Corinth and Evvia rift system, and compare them to those obtained independently from teleseismic tomography and receiver function analyses. The results of these different studies appear to be consistent and show (1) a 10 km crustal thickening in the western part of the area beneath the Hellenides mountains, (2) NW–SE-trending periodic crustal thinning, and (3) a maximum crustal thinning north of the Gulf of Corinth. This 4 km thinning is unlikely to be the result of the rifting alone, which seems to have been reactivated since only 1 Ma. We propose here a geodynamical scenario in two major steps to explain the evolution of Corinth area. Aegean Miocene extension involving boudinage resulted in periodic crustal thinning, consistent with observations. These lithospheric instabilities could have favoured rupture initiation in particular areas, especially near the city of Corinth. Then, the reactivation of the Corinth Rift extension, 1 Myr ago, led to westward rift propagation. The offset observed between the maximum crustal thinning and the Gulf of Corinth could be accommodated by a lowangle normal fault at about 10–15 km depth. The Corinth Rift is thus asymmetrical and was initiated in places of crustal weakness due to Miocene lithospheric instabilities.read more
Citations
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The Gulf of Corinth: an active half graben?
TL;DR: In this article, the authors reviewed new data, especially subsurface data, from both onshore and offshore, compiled or acquired through the Corinth Rift Laboratory EEC project, and indicated that the Gulf of Corinth is bordered both north and south by active faults.
Journal ArticleDOI
Lithospheric structure of the Aegean obtained from P and S receiver functions
Forough Sodoudi,Rainer Kind,Denis Hatzfeld,Keith Priestley,Winfried Hanka,K. Wylegalla,G. Stavrakakis,Antonis Vafidis,Hans-Peter Harjes,Marco Bohnhoff +9 more
TL;DR: In this article, the authors used combined P and S receiver functions from seismograms of teleseismic events recorded at 65 temporary and permanent stations in the Aegean region to map the geometry of the subducted African plate and the overriding plate.
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Aegean crustal thickness inferred from gravity inversion. Geodynamical implications
TL;DR: In this paper, a map of the Aegean crustal thickness inferred from gravity inversion is proposed to better constrain the variations in space and time of crustal thinning that accumulated since Oligo-Miocene times.
Journal ArticleDOI
Subduction, convergence and the mode of backarc extension in the Mediterranean region
Laurent Jolivet,Romain Augier,Claudio Faccenna,F. Negro,Gaëtan Rimmelé,Philippe Agard,Cécile Robin,Federico Rossetti,Ana Crespo-Blanc +8 more
TL;DR: In this paper, the authors show that the sense of shear along crustal-scale detachments is toward the trench when subduction proceeds with little or no convergence and away from the trench in the case of true convergence (Aegean).
Journal Article
Subduction convergence and the mode of backarc extension in the Mediterranean region
Laurent Jolivet,Romain Augier,Claudio Faccenna,F. Negro,Gaëtan Rimmelé,Philippe Agard,Cécile Robin,Federico Rossetti,Ana Crespo-Blanc +8 more
TL;DR: In this paper, the authors show that the sense of shear along crustal-scale detachments is toward the trench when subduction proceeds with little or no convergence and away from the trench in the case of true convergence (Aegean).
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