Upper mantle structure under the Zagros collision zone; insights from 3D teleseismic P-wave tomography

We map the lateral variations of P-wave velocity beneath Zagros collision zone in Iran down to 800 km depth by regional travel time tomography. invert 32,293 relative residuals from five temporary seismic networks across NW and central northern Iran, a large number permanent stations distributed over Iranian Plateau. A salient feature our model is ~225 thick lithosphere Zagros, almost twice as rest Iran. Slab detachment at range 250–300 base subducted continental Arabia clearly distinguishable Zagros. In appears be an earlier stage. Beneath Plateau, we observe shallow low-velocity regions 200 depth, smaller patches with significantly higher 200–400 range. This pattern might suggest post-collisional foundering mantle upper plate. The slab seems penetrate into lower segmented fashion, no evidence for stagnant above 660 interface.