Crustal scale imaging of the Arabia - Central Iran collision boundary across the Zagros suture zone, west of Iran

Autor(en)

Farzaneh Dashti, Francesco Pio Lucente, Khalil Motaghi, Irene Bianchi, Mahdi Najafi, Aladino Govoni, E. Shabanian

Abstrakt

We calculate seismic velocity structure of the north Zagros suture zone, west Iran, to resolve the crustal features at the boundary of Arabian-Central Iranian collision. We compute teleseismic receiver functions (RFs) for 46 stations along a transect crossing the suture. Through harmonic analysis and inversion of the RF data, we obtain information on the characteristics of the suture zone at depth. The RFs and their harmonics show a low angle NE dipping boundary between the overriding layer and a midcrustal low velocity zone, which corresponds to the suture zone. The overriding high velocity feature (Vs ~ 3.8 km/s) is interpreted as an intermediate depth crustal complex exhumed close to the surface through imbricate thrust faulting and enhanced by crustal buoyancy due to continental underthrusting. Significant anisotropy is found above and below the suture zone: We interpret it in terms of slow-symmetry-axis anisotropy and derive clues on the ongoing deformation processes.

Organisation(en)

Personalwesen und Frauenförderung, Institut für Meteorologie und Geophysik

Externe Organisation(en)

Institute for Advanced Studies in Basic Sciences, Istituto Nazionale di Fisica Nucleare (INFN), Roma, Istituto Nazionale di Oceanografia e di Geofisica Sperimentale

Journal

Geophysical Research Letters

Band

47

Anzahl der Seiten

9

ISSN

0094-8276

DOI

https://doi.org/10.1029/2019GL085921

Publikationsdatum

04-2020

Peer-reviewed

Ja

ÖFOS 2012

105122 Seismik

Schlagwörter

ASJC Scopus Sachgebiete

Geophysics, Earth and Planetary Sciences(all)

Link zum Portal

https://ucris.univie.ac.at/portal/de/publications/crustal-scale-imaging-of-the-arabia--central-iran-collision-boundary-across-the-zagros-suture-zone-west-of-iran(27b10dd8-1305-4e0a-8a8d-8c1348755bb7).html