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Upper-mantle S-velocity structure across the Zagros collision zone resolved by nonlinear teleseismic tomography
University of Tehran, Iran.
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Geophysics.
International Institute of Earthquake Engineering and Seismology, Iran.
Institut für Geowissenschaften, Facheinheit Geophysik, Germany.
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
Abstract [en]

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.
Keyword [en]
Body waves, Teleseismic tomography, Upper-mantle structures, Zagros collision zone
National Category
Earth and Related Environmental Sciences
URN: urn:nbn:se:uu:diva-143152DOI: 10.1007/s10950-011-9226-yISI: 000289002600008OAI: oai:DiVA.org:uu-143152DiVA: diva2:389389
Available from: 2011-01-19 Created: 2011-01-19 Last updated: 2011-04-19Bibliographically approved

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