Salt tectonics of Garmsar basin (north of central Iran)

Subject Areas :

محسن Pourkermani ¹ , Mahdi Nazarizadeh ² , M.A GHorbani ³

1 - استاد دانشگاه آزاد اسلامی، واحد تهران شمال
2 - کارشناس ارشد شرکت مهندسین مشاور گوهریابان زاگرس
3 - کارشناس ارشد شرکت مهندسین مشاور کان آذین

Received: 2016-09-05 Accepted : 2016-09-05 Published : 2009-03-21

Keywords: Garmsar thrust fault, salt structure, nappe, open toe, allochthonous salt sheets,

Abstract :

Evaporate basin of North and West of Garmsar, tectonically is an east-west graben that located in thenorth border of central Iran back-arc basin. Garmsar fault as the most important tectonic structure ofthe studied area, trending east-west, is accommodated in north of Garmsar which declines towards thewest and its trend changes to NW-SE. The mentioned fault is a thrust dipping to the north with leftlateral attitude. Considering fracture system of salt structures in the studied area implies on influencingE-W structural trend of Garmsar thrust on salt structures. Garmsar thrust as the principle structure hasthe most important role in upwards movement of upper Eocene-Oligocene salt mass and taking themto the surface. Outcropped evaporate system imply existing a salt nappe aquifer in north of centralIran.