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1 Laboratoire d'Etudes des GéoEnvironnements Marins (LEGEM), Université de Perpignan Via Domitia, 52, avenue Paul Alduy, 66860 Perpignan, France;
gaullier{at}univ-perp.fr
2 Bureau of Economic Geology, University of Texas at Austin, Austin, Texas; present address: Université de Lille 1, UFR Sciences de la Terre, UMR 8110, Cité Scientifique, Bat. SN5, Villeneuve d'Ascq F-59655, France;
bruno.Vendeville{at}univ-lille1.fr
Virginie Gaullier received her Ph.D. from the Université de Paris 6 in 1993 and is an assistant professor at the LEGEM at the Université de Perpignan, France. Virginie's current research work uses geophysical data and analog modeling to study the interaction between sedimentation and gravity-driven deformation in deep-sea fans with emphasis on salt tectonics and mass-wasting processes.Bruno C. Vendeville received his Ph.D. from the Université de Rennes, France, in 1987. After a postdoctoral stay in 1988 and 1989 at the Center for Tectonophysics, Texas A&M University, he worked at the Bureau of Economic Geology, University of Texas at Austin for 15 years. Since 2004, Bruno has been a professor at the Université des Sciences et Technologies de Lille 1 in northern France. Bruno's research topics include salt and shale tectonics, as well as experimental tectonic modeling of other tectonic and gravitational processes at various scales.
Experimental models indicate that sedimentary lobes deposited above mobile evaporites deform gravitationally by spreading outward radially. Radial spreading forms both concentric and radial families of thin-skinned grabens that are then pierced diapirically by salt ridges. The overburden blocks located between the ridges become subsiding depocenters. Later, continued spreading after depletion of the salt layer forces salt ridges and diapirs to fall, forming rapidly subsiding bathymetric lows that channel or trap younger sediments. Spreading causes large horizontal overburden movements whose distribution and orientation change when the locus of regional deposition shifts.
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