Basement Faults Effect on the Folding Style: A Case Study from Hendurabi Fault, Zagros, Iran.

In the Zagros fold-thrust belt, the Fars region is affected by the basement left-lateral strike-slip faults such as the Nezamabad, Razak, and Hendurabi faults which these faults have affected on the folding system of this area and the effect of these faults activity is one of the factors in the folding diversity. Also, the Fars region anticlines are very important in the Zagros fold-thrust belt, due to their huge gas reserves in the Permian‒Triassic carbonate sediments. The Hendurabi faults have major effects on folding style base on changes of the folding geometry. For more analysis, when the effective stress and deformation value is different, the type of fold has been changed in different parts of fold. This case may be created by cropping out of the salt domes, activities of main active faults and other structural elements. The studied area is a special structural feature in the Zagros fold-thrust belt that is shown the effects of the strike slip faults on the folding geometry. In the study area, close fold type in all parts has shown the study anticline affected by the special may be from deformation of the Razak and Hendurabi sinistral strike-slip faults. [ABSTRACT FROM AUTHOR]