1Department of Earth Sciences, College of Sciences, Shiraz University, Shiraz, Iran.
2Department of Earth Sciences, Faculty of Sciences, Institute for Advanced Studies in Basic Sciences, Zanjan, Iran.
3Department of Geology, Faculty of Sciences, University of Zanjan, Zanjan, Iran.
Understanding the folding style of a fold-thrust belt is crucial to understand the nature and structural history of structures that may trap natural resources within the belt. In this research, the geometry and mechanism of a number of fault-related folds has been investigated based on field data and satellite image interpretations. The main study areas are: the Sohrevard and Ushtaniyan anticlines, Bahman and Halab synclines, and Gharahdagh, Halab, and Gheydar thrust faults, which have a NW-SE direction. These thrust faults control the morphology and structural framework of the Halab-Gheydar area. Geomorphic features of the folds suggest that they are fault-related folds. The structural style of the faults and associated folds indicate that these faults were reactivated during the Alborz deformation event.