Crustal Velocity Structure in Iranian Kopeh-Dagh, from Analysis of P-Waveform Receiver Functions
عنوان مقاله: Crustal Velocity Structure in Iranian Kopeh-Dagh, from Analysis of P-Waveform Receiver Functions
شناسه ملی مقاله: JR_JSEE-8-4_001
منتشر شده در در سال 1386
شناسه ملی مقاله: JR_JSEE-8-4_001
منتشر شده در در سال 1386
مشخصات نویسندگان مقاله:
Gholamreza Nowrouzi - IIEES
Keith Priestley - Department of Earth Sciences, University of Cambridge
Mohsen Ghafory-Ashtiany - IIEES
Gholam Javan Doloei - IIEES
Daniel Rham - Department of Earth Sciences, University of Cambridge
خلاصه مقاله:
Gholamreza Nowrouzi - IIEES
Keith Priestley - Department of Earth Sciences, University of Cambridge
Mohsen Ghafory-Ashtiany - IIEES
Gholam Javan Doloei - IIEES
Daniel Rham - Department of Earth Sciences, University of Cambridge
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. ۴۱ 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 ۴۴-۵۰km. Results indicate three main layers; the upper crust has an S-wave velocity between ۲.۱-۳.۲km/s and a ۱۰ to ۱۲km thickness, a middle crust with S-wave velocity between ۳.۲-۳.۷km/s and a ۲۲ to ۲۵km thickness and the lower crust with S-wave velocity between ۳.۷-۴.۴km/s and a ۱۲ to ۱۵km thickness. An S wave velocity between ۴.۶-۴.۷km/s indicates the velocity of the Moho at ۴۷km on average and varies from ۴۴ to ۵۰km. Deeper Moho is found under the southern station.
کلمات کلیدی: Kopeh-Dagh, Hezar-Masjed Mountains, Crustal Structure, Moho Discontinuity, Teleseismic Receiver Functions
صفحه اختصاصی مقاله و دریافت فایل کامل: https://civilica.com/doc/1303944/