Subduction tractions and vertical axis rotations in the Zagros–Makran transition zone, SE Iran: the 2013 May 11 Mw 6.1 Minab earthquake

Penney, Camilla and Copley, Alex and Oveisi, Behnam (2015) Subduction tractions and vertical axis rotations in the Zagros–Makran transition zone, SE Iran: the 2013 May 11 Mw 6.1 Minab earthquake. Geophysical Journal International, 202 (2). pp. 1122-1136. ISSN ISSN: 0956-540X, ESSN: 1365-246X DOI 10.1093/gji/ggv202

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Official URL: http://gji.oxfordjournals.org/lookup/doi/10.1093/g...

Abstract

The source parameters and slip distribution of the 2013 May 11 Mw 6.1 Minab earthquake are studied using seismology, geodesy and field observations. We observe left-lateral strike-slip motion on a fault striking ENE–WSW; approximately perpendicular to previously studied faults in the Minab–Zendan–Palami fault zone. The fault that ruptured in 2013 is one of a series of ∼E–W striking left-lateral faults visible in the geology and geomorphology. These accommodate a velocity field equivalent to right-lateral shear on ∼N–S striking planes by clockwise rotations about vertical axes. The presence of these faults can reconcile differences in estimates of fault slip rates in the western Makran from GPS and Quaternary dating. The longitudinal range of shear in the western Makran is likely to be controlled by the distance over which the underthrusting Arabian lithosphere deepens in the transition from continent–continent collision in the Zagros to oceanic subduction in the Makran.

Item Type: Article
Additional Information: This article has been accepted for publication in Geophysical Journal International © The Authors 2015. Published by Oxford University Press on behalf of The Royal Astronomical Society. All rights reserved.
Subjects: 02 - Geodynamics, Geophysics and Tectonics
Divisions: 02 - Geodynamics, Geophysics and Tectonics
08 - Green Open Access
Journal or Publication Title: Geophysical Journal International
Volume: 202
Page Range: pp. 1122-1136
Identification Number: 10.1093/gji/ggv202
Depositing User: Sarah Humbert
Date Deposited: 23 Dec 2015 15:13
Last Modified: 23 Dec 2015 15:13
URI: http://eprints.esc.cam.ac.uk/id/eprint/3534

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