Contribution of Micro and Macrotectonic Analysis in the Characterization of the Tectogenesis of Atlasic Folds of Central Tunisia: Case of Jebel Meloussi

The main objective of this work is to highlight the contribution of micro and macrotectonic in the characterization of the tectogenesis of the atlasic folds of the Central-Southern Atlas. Fieldwork carried out in the NE-SW asymmetric anticline of Jebel Meloussi shows numerous micro and macrotectonic deformations. The examination of these structures allows us to determine extensional synsedimentary tectonic deformations as well as deformations related to late compressive tectonics. The highlighted synsedimentary deformations indicate an extensional tectonics during the Cretaceous. This tectonic involves five major NW-SE to submeridian faults: the Ein el Karma fault, the Khanguet Zebbag fault, the Ein Jebs Fault, the Zefzef Fault, and Remilia Fault. The studied microtectonic stations contribute to qualify the tectonic fracturation. The resulting stress tensors from this fracturation confirm an atlasic to post-Villafranchian phases responsible for the major folding.