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Solid Earth An interactive open-access journal of the European Geosciences Union

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doi:10.5194/sed-6-1-2014
© Author(s) 2014. This work is distributed
under the Creative Commons Attribution 3.0 License.
Research article
02 Jan 2014
Review status
This discussion paper has been under review for the journal Solid Earth (SE). The revised manuscript was not accepted.
Crust and upper mantle structures of the Makran subduction zone in south-east Iran by seismic ambient noise tomography
M. Abdetedal1, Z. H. Shomali1,2, and M. R. Gheitanchi1 1Institute of Geophysics, University of Tehran, Iran
2Department of Earth Sciences, Uppsala University, Uppsala, Sweden
Abstract. We applied seismic ambient noise surface wave tomography to estimate Rayleigh wave empirical Green's functions from cross-correlations to study crust and uppermost mantle structure beneath the Makran region in south-east Iran. We analysed 12 months of continuous data from January 2009 through January 2010 recorded at broadband seismic stations. We obtained group velocity of the fundamental mode Rayleigh-wave dispersion curves from empirical Green's functions between 10 and 50 s periods by multiple-filter analysis and inverted for Rayleigh wave group velocity maps.

The final results demonstrate significant agreement with known geological and tectonic features. Our tomography maps display low-velocity anomaly with south-western north-eastern trend, comparable with volcanic arc settings of the Makran region, which may be attributable to the geometry of Arabian Plate subducting overriding lithosphere of the Lut block. At short periods (<20 s) there is a pattern of low to high velocity anomaly in northern Makran beneath the Sistan Suture Zone. These results are evidence that surface wave tomography based on cross correlations of long time-series of ambient noise yields higher resolution group speed maps in those area with low level of seismicity or those region with few documented large or moderate earthquake, compare to surface wave tomography based on traditional earthquake-based measurements.


Citation: Abdetedal, M., Shomali, Z. H., and Gheitanchi, M. R.: Crust and upper mantle structures of the Makran subduction zone in south-east Iran by seismic ambient noise tomography, Solid Earth Discuss., 6, 1-34, doi:10.5194/sed-6-1-2014, 2014.
M. Abdetedal et al.
Interactive discussionStatus: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version      Supplement - Supplement
 
RC C2: 'Comments', Anonymous Referee #1, 03 Feb 2014 Printer-friendly Version 
AC C237: 'Reply to the referee#1', Mahsa Abdetedal, 10 Apr 2014 Printer-friendly Version Supplement 
 
RC C116: 'Comments to se-2013-57', Anonymous Referee #2, 12 Mar 2014 Printer-friendly Version 
 
AC C247: 'Reply to the referee#2', Mahsa Abdetedal, 10 Apr 2014 Printer-friendly Version Supplement 
M. Abdetedal et al.
M. Abdetedal et al.

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