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Salt-related gravity-driven processes in the Levant Basin, Eastern Mediterranean: Insights from physical modeling

Anagnostoudi Th. (1),Vendeville B.C. (2), Gaullier V. (2), Ferrer O. (3), Schattner U. (4), Lazar M. (1)

(1) The Dr. Moses Strauss Department of Marine Geosciences, Leon H.Charney School of marine sciences. University of Haifa, Mt. Carmel, Haifa 3498838

(2) The Dr. Moses Strauss Department of Marine Geosciences, Leon H.Charney School of marine sciences. University of Haifa, Mt. Carmel, Haifa 3498838

(5) (2) Univ. Lille, CNRS, Univ. Littoral Cˆote d’Opale, IRD, UMR 8187, LOG, Laboratoire d’Oc´eanologie et de G´eosciences, F 59000 Lille, France
(3) Institut de Recerca Geomodels, Departament de Dinamica ` de la Terra i de l’Ocea, ` Facultat de Ci`encies de la Terra, Universitat de Barcelona, 08028, Barcelona, Spain
(4) School of Environmental Sciences, University of Haifa, Mount Carmel 3103301, Haifa, Israel

The characterization of salt tectonics and its gravity-driven deformation processes are the key to a better un­derstanding of the structural evolution of salt-bearing rifted margins. Unlike most salt basins that have experi­enced long-lasting deformation, the Messinian evaporites in the Levant Basin have been moderately deformed, offering the opportunity to study the early stage of salt tectonic deformation. Despite the availability of seismic reflection, borehole and bathymetrical data, some uncertainties still exist about the mechanisms responsible for the deformation and structural features observed in the deep-water Levant Basin. Our study includes physical
experiments based on published seismic and structural interpretations conducted in the Levant Basin. Our physical experiments take into consideration the main driving parameters that controlled the development of the deep-water Levant Basin, testing the interplay and impact of gravity gliding and spreading from the Levant Margin, gravity spreading from the Nile Deep Sea Fan, and the influence of the passive buttress of the Eratos­thenes Seamount. Deformation was imposed by depositing successive sand lobes and/or by tilting the experi­mental table. The physical models included a thick viscous silicone layer, analogue of the Messinian evaporitic sequence, overlain by a granular overburden, simulating the brittle clastic post-Messinian succession. Results show that the prominent gravity-driven force affecting the deformation pattern of the deep-water Levant Basin is the gravity spreading from the Nile Deep Sea Fan, whereas gravity spreading and gliding from the Levant Margin affect only the proximal to the margin areas. Additionally, the buttressing effect of the Eratosthenes Seamount and the location of the salt basin pinch-out played an important role in the final deformation pattern of this region of the Eastern Mediterranean.

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