Salt Structures and Their Relation with Faulting In North Garmsar

Based on sedimentary-structural zonation of Iran، the studied area is located in the northern borders of Central Iran and southern parts of Alborz mountain. Garmsar fault as the most important tectonic structure of the studied area، trending east-west، is accommodated in north of Garmsar which declines towards the west and its trend changes to NW-SE. The mentioned fault is a thrust dipping to the north with left lateral attitude. Considering fracture system of salt structures in the studied area implies on influencing E-W structural trend of Garmsar thrust on salt structures. Garmsar thrust as the principle structure has the most important role in upwards movement of Upper Eocene-Oligocene salt mass and taking them to the surface. Outcropped evaporate system imply existing a salt nappe aquifer in north of Central Iran.