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NARROW
Format
Article Type
Journal
Publisher
GeoRef Subject
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all geography including DSDP/ODP Sites and Legs
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Asia
-
Middle East
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Iran
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Elburz (4)
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Zagros (1)
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geochronology methods
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paleomagnetism (1)
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Primary terms
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Asia
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Middle East
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Iran
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Elburz (4)
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-
Zagros (1)
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-
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catalogs (1)
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crust (2)
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deformation (1)
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earthquakes (7)
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explosions (1)
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faults (3)
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geophysical methods (1)
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Mohorovicic discontinuity (2)
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paleomagnetism (1)
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plate tectonics (1)
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remote sensing (1)
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sediments (1)
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tectonics (3)
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sediments
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sediments (1)
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GeoRef Categories
Book Series
Date
Availability
A Global Catalog of Calibrated Earthquake Locations Available to Purchase
Sensor Orientation of Iranian Broadband Seismic Stations from P ‐Wave Particle Motion Available to Purchase
Crustal density structure of the northwestern Iranian Plateau Available to Purchase
The Ahar‐Varzeghan Earthquake Doublet ( M w 6.4 and 6.2) of 11 August 2012: Regional Seismic Moment Tensors and a Seismotectonic Interpretation Available to Purchase
Combined Inversion of Broadband and Short‐Period Waveform Data for Regional Moment Tensors: A Case Study in the Alborz Mountains, Iran Available to Purchase
Pn -velocity structure beneath Arabia–Eurasia Zagros collision and Makran subduction zones Available to Purchase
Abstract We use Pn -tomography to map lithospheric mantle velocity and anisotropy at the Arabia–Eurasia plate boundary, namely Makran and Zagros. We use catalogue events recorded by Oman, UAE, Saudi Arabia and Iran networks, the International Seismological Centre and the National Earthquake Information Center. Events of 1.8–16 degree distances were used for this Pn -tomography. In this study we show that the northeastern Arabia plate is characterized by cold and stable lithospheric mantle. Contrastingly, Eurasia is underlain by hot unstable lithospheric mantle. The Arabia–Eurasia lithospheric suture follows the Zagros collision surface suture within c. 70 km lateral proximity. At the southernmost Zagros collision, the Arabia lithosphere is inferred to extend further NE beneath Lut Block. This may be indicative of extended subduction of Arabia beneath Eurasia in southernmost Zagros. We find that eastern Makran shows typical subduction characteristics, with inferred oceanic lithosphere underlying the eastern Oman Sea and hot unstable lithospheric mantle below overriding Helmand Block. Contrastingly, the western Makran subduction zone including Arabia and Eurasia continental sides is underlain by a low- Pn -velocity anomaly, indicative of hot unstable lithospheric mantle. Surface evidence show that western, southern and eastern boundaries of western Makran low- Pn -velocity anomaly may represent a Late Neogene reactivated Precambrian terrane boundary in north Oman.