The crustal structure beneath the northwest of the Zagros (Kermanshah Region) from teleseismic receiver functions

Afsari, Narges; Sodoudi, Forogh; Gheitanchi, Mohammad Reza; Kaviani, A; Taghizadeh Farahmand, Fataneh

The crustal structure beneath the northwest of the Zagros (Kermanshah Region) from teleseismic receiver functions

Authors

Abstract

In this study, we used teleseismic data which was recorded by 5 stations (DHR, GHG, KOM, LIN and VIS) of the Kermanshah Seismic Network from 2003 to 2007 with Mb?5.5 and epicentral distances from 30° to 95°. The crustal structure beneath these stations was determined by the modeling of the P receiver functions. The main phases, which were observed in our final P receiver functions, are Moho conversions, their multiples in the crust, and conversions at the base of the sediments. We obtained a 2-layer model for the crust of the Kermanshah Region. The crust beneath this region is approximately 42 km thick and consists of a 9 to 18 km thick sedimentary layer overlying a 24 to 35 km thick layer. The average shear wave velocity was estimated to be 3.69 kms-1 in the crust and reaches to 4.80 kms-1 under Moho and those obtained from other geophysical studies.

Keywords