Upper-mantle S-velocity structure across the Zagros collision zone resolved by nonlinear teleseismic tomography
2011 (English)In: Journal of Seismology, ISSN 1383-4649, E-ISSN 1573-157X, Vol. 15, no 2, 329-339 p.Article in journal (Refereed) Published
Non-linear teleseismic S-phase tomography across the Zagros collision zone in southwestern Iran is used to determine a high-resolution image of the upper-mantle structure. The inversion was done using 41 high-quality earthquakes recorded by 19 broad-band and medium-band stations along a 620 km long profile across the collision zone. Smearing from strong crustal velocity anomalies into the upper-mantle is suppressed by travel-time corrections calculated based on a 3D crustal model for the study area. Our results show that the relatively old and cold Arabian shield has a higher velocity (up to 6% faster, at depths between 70 and 300 km) than the younger lithosphere farther north in Central Iran. These two upper-mantle domains are separated by a sharp near-vertical transition whose surface expression coinciding with the Main Zagros Thrust.
Place, publisher, year, edition, pages
2011. Vol. 15, no 2, 329-339 p.
Body waves, Teleseismic tomography, Upper-mantle structures, Zagros collision zone
Earth and Related Environmental Sciences
IdentifiersURN: urn:nbn:se:uu:diva-143152DOI: 10.1007/s10950-011-9226-yISI: 000289002600008OAI: oai:DiVA.org:uu-143152DiVA: diva2:389389