Geometric and Kinematic Analysis of Transverse Faults in Dasht-e Bu Region (NW of Damghan)

In this research، the geometric and kinematic relationships between longitudinal and transverse faults in Dasht-e bu region (northwest of Damghan، eastern Alborz belt) were studied. All the longitudinal faults (Mila، Sabur and Mahtab faults) extend along NE-SW direction، whereas the transverse faults (Cheshmeh gholghol، north Tuyeh and Dasht-e bu faults) represent nearly N-S trending structures. The transverse faults are hangingwall tear faults which resulted from thrusting occurred on longitudinal faults. There is a geometric and kinematic relationship between the two groups of faults، so that the longitudinal faults can be considered to play the role of transfer faults for the transverse faults. Movement along the transverse faults (lateral ramps) is diminished toward their tips and is transferred to the longitudinal faults.