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Department of Earth Sciences, University of Cambridge
Abstract
In this study, the crustal velocity structure and depth of Moho is determined under the eastern part of Iranian Kopeh Dagh, North-East Iran that is named Hezar-Masjed mountains. The teleseismic waveform receiver functions technique is used to determine crustal thicknesses in this study. 41 teleseismic earthquakes from three broadband seismometers installed in the Iranian Kopeh-Dagh, are used to calculate P-wave receiver functions. Receiver functions for each station are generated from events for a wide range of backazimuths. From analysis of receiver functions at KAR, ZOW and HAM stations, the crustal structure is suggested for the Hezar-Masjed area with a Moho depth of 44-50km. Results indicate three main layers; the upper crust has an S-wave velocity between 2.1-3.2km/s and a 10 to 12km thickness, a middle crust with S-wave velocity between 3.2-3.7km/s and a 22 to 25km thickness and the lower crust with S-wave velocity between 3.7-4.4km/s and a 12 to 15km thickness. An S wave velocity between 4.6-4.7km/s indicates the velocity of the Moho at 47km on average and varies from 44 to 50km. Deeper Moho is found under the southern station.
Nowrouzi, G., Priestley, K., Ghafory-Ashtiany, M., Javan Doloei, G., & Rham, D. (2007). Crustal Velocity Structure in Iranian Kopeh-Dagh, from Analysis of P-Waveform Receiver Functions. Journal of Seismology and Earthquake Engineering, 8(4), 187-194.
MLA
Gholamreza Nowrouzi; Keith F. Priestley; Mohsen Ghafory-Ashtiany; Gholam Javan Doloei; Daniel J. Rham. "Crustal Velocity Structure in Iranian Kopeh-Dagh, from Analysis of P-Waveform Receiver Functions". Journal of Seismology and Earthquake Engineering, 8, 4, 2007, 187-194.
HARVARD
Nowrouzi, G., Priestley, K., Ghafory-Ashtiany, M., Javan Doloei, G., Rham, D. (2007). 'Crustal Velocity Structure in Iranian Kopeh-Dagh, from Analysis of P-Waveform Receiver Functions', Journal of Seismology and Earthquake Engineering, 8(4), pp. 187-194.
VANCOUVER
Nowrouzi, G., Priestley, K., Ghafory-Ashtiany, M., Javan Doloei, G., Rham, D. Crustal Velocity Structure in Iranian Kopeh-Dagh, from Analysis of P-Waveform Receiver Functions. Journal of Seismology and Earthquake Engineering, 2007; 8(4): 187-194.
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