تداوم راستای گسله اصلی جدید زاگرس در گستره بین مدار۳۲ تا۳۳ درجه شمالی

Abstract

Main Recent Fault (MRF) includes segments of a series of faults with approximately vertical dips and ۱۰۰km average lengths which it is situated in the High Zagros area. Right lateral strike slip mechanism of this fault is suggested by presence of various features. Segments of MRF that have been introduced earlier include Piranshahr, Marivan, Sarthakht, Morvarid, Dinvar, Sahneh, Nahavand, and Doroud faults; this assemblage forms a seismic and active trend. In this research Bakhtyari-Kohrang (BK) and Ardal (Ar) faults, which are continuation of MRF in the South East, have been introduced.  BK Fault is divided from Doroud fault in ۳۳N as an Enechelon structure and extends with N۱۴۰ trend, vertical dip and ۸۰-km length to the ۳۰,۳۲N. The second segment, which is called Ardal, with ۱۲۰ km length and vertical dip, shows right lateral strike slip mechanism. This segment is divided from BK in the ۳۲° ۳۰¢N by a set of two NS faults. The former extends towards the Naghan area by clear traces; although it could not be traced afterward, but it seems it has been extended toward the Dena fault.