CRUSTAL GEOMETRY AND TRASNSITION ZONE BOUNDARIES BENEATH IRAN

We reanalyzed P receiver functions beneath a 1200 km long profile from Bushehr to Sarakhs to investigate the variation of crust–mantle boundary beneath the Zagros continental collision zone. Our results shows a rapid change of Moho boundary 60 km north of MZT implying that the MZT extends through the entire crust. we also image upper mantle transition zone by detecting two velocity discontinuities at about 410 km and 670 km depth. The boundaries are continues and constantly separated. This may imply low dip angle subduction of Arabian slab beneath Central Iran in the past.

Keywords:

P Receiver Function , Zagros , MZT , Crust , Transition Zone