Determination of the deep fault geometry along the southern branch of the North Anatolian Fault System by using resistivity and magnetic methods

•Foothills of highlands are defined by right lateral strike-slip fault.•The dipping angles of the faults on the surface are similar to those located in the shallower and deep parts of the continental crust.•The faults in the deep parts of crust are the transtensional stresses components of the strike-slip faulting.•Comparison of the positioning of the faults in the deep parts of the continental crust to those observed on the surface indicate a fault zone related to strike-slip tectonic system in the region.