Salt deformation history and salt related structures signification ,offshore Golf of Gabes,Tunisia

Regional seismic profile shows salt walls predominance on the Golf of Gabes which is flanked by elongate minibasins. The overburden and the underlying sub-salt basement become welded together which means that salt layer is completely removed , Salt welds forms may are in response to complete evacuation of salt materials due to salt movement or to viscous flow and dissolution , in consequence the salt growth may be still stopped at the actual stage. The rim basin between the salt walls reveal an important subsidence history of the basin .The Salt diapir in the study area is characterized by an upward-converging sides and antithetic crestal faults which can be the result from levelling movements that reduce structural relief due to salt growth according to Cloos(1928) and Dennis and Kelley (1980)or the consequence of salt welds formation. Thickness variation of geological strata toward the salt diapir reveals evidence about synsedimentary activity.