مرکز منطقه ای اطلاع رساني علوم و فناوري -

چكيده لاتين :

This paper provides some documents to reintroduce the active faults and their ability to generate strike-slip earthquakes in west-central Zagros Fold and Thrust Belt (ZFTB). For this purpose, the structural and geomorphic arguments were presented to improve the fault kinematics and segmentation need for calculation of the largest magnitude due to their reactivation within interested area. Slip rates along strike slip faults, which have already been estimated, are used to estimate the probable recurrence interval time ofthe events. The strike-slip faults extend in N-S direction around 52°Efrom frontal part ofZFTB to the north and continued along the strike ofthe Belt, i.e. the Main Recent Fault (MRF), at the rear ofthe belt. The MRF has been considered as a major dextral strike-slip fault in the context of the tectonic model ofthe strain partitioning. It was shown that MRF is not unique in the strain partitioning system, but the High Zagros Fault (HZF) in the domain ofthe High Zagros Belt (HZB) is contributing in the partitioning of strain of the Arabian plate oblique convergence. Therefore, both ofHZF and MRF can potentially cause the strike-slip events. Our data shows that the lengths offault segments along MRF increase toward northwestward. In case of HZF and Kazerun faults, the segmentsי lengths increase in southeast and northward, respectively. The growth ofthe length ofthe segments is in accordance with the increase of the slip-rate. Consequently, it was expected that the seismicity would increase in these directions.