Structural analysis of the South Nataz Region, evidence for interaction of the dextral transpression on earlier thrust faults in central Iran

South Natanz Area is structurally located in the western part of the Central Iranian structural zone and central part of the Orumieh-Dokhtar magmatic belt at southwestern termination of the Qom-Zefreh Fault. Our structural data represents older generation of E-W to NW-SE thrust faults as Fasakhod Fault that juxtaposes Permian- Triassic (Jamal, Nayband and Shotori Formations) over younger rock units. Most of the thrust faults have been cross cut with younger generation of strike-slip fault system. These mainly post Eoene strike slip fault systems are structurally linke to Qom-Zefreh Fault zone. On the other hand, they developed as strike slip orders of the Qom-Zefreh Fault system in central part of the Orumieh-Dokhtar magmatic belt. Integration of the structural data set with stratigraphic unconformities observed in the south Natanz represet regional folding of the area during pre Early Cretaceous time. Subsequently, it has experienced regional extension as observed in the other parts of the central Iran during Early Cretaceous time. Major thrust faulting of the area has been occuered during post Late Createcous time. The final post Oligocene strike slip faulting related to the activation of the Qom- Zefreh fault has overprinted and cross cut older structural features.