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Upper-mantle S-velo...
Upper-mantle S-velocity structure across the Zagros collision zone resolved by nonlinear teleseismic tomography
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- Keshvari, Forough (författare)
- University of Tehran, Iran
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- Shomali, Zaher Hossein (författare)
- Uppsala universitet,Geofysik
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- Tatar, Mohammad (författare)
- International Institute of Earthquake Engineering and Seismology, Iran
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- Kaviani, Ayoub (författare)
- Institut für Geowissenschaften, Facheinheit Geophysik, Germany
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(creator_code:org_t)
- 2011-01-21
- 2011
- Engelska.
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Ingår i: Journal of Seismology. - : Springer Science and Business Media LLC. - 1383-4649 .- 1573-157X. ; 15:2, s. 329-339
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- 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.
Ämnesord
- NATURVETENSKAP -- Geovetenskap och miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences (hsv//eng)
Nyckelord
- Body waves
- Teleseismic tomography
- Upper-mantle structures
- Zagros collision zone
- Earth sciences
- Geovetenskap
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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