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Journal:   GEOSCIENCES   WINTER 2010 , Volume 19 , Number 74; Page(s) 131 To 136.
 
Paper: 

Crustal Structure Beneath Northwest Iran Using Teleseismic Converted Waves

 
 
Author(s):  Taghizadeh Farahmand F.*, Sodoudi F., Gheitanchi M.R., Kaviani A.
 
* SCIENCE AND RESEARCH BRANCH, ISLAMIC AZAD UNIVERSITY (IAU), TEHRAN, IRAN
 
Abstract: 
We compute p receiver functions (RF) to investigate the crustal thickness and Vp/Vs ratio beneath the northwest of Iran and map out the lateral variation of Moho depth under this region. We selected data from teleseismic events (Mb ³5.5, 30o<D<95o) recorded since 2000 to present at 8 three component short period stations from Tabriz teleseismic network. RF method is now a well-known tool for studying crustal thickness when such a complete data set is available. As the p-to-s conversion points at the Moho is laterally close to the stations, the Moho depth estimation is less affected by lateral velocity variations and thus provides a good point measurement. First of all, we calculated RFs for each station and then the Moho depth will be estimated only from the delay time of the Moho p-to-s conversion phases. Then we used an H-Vp/Vs stacking algorithm (Zhu & Kanamori, 2000) to estimate crustal thickness and Vp/Vs ratio under each station from P-to-S converted waves in receiver functions. The best value for H and Vp/Vs ratio is found when the three phases (Ps and crustal multiples) are stacked coherently. The average Moho depth is approximately 48 km and varies from 38.5±1 to 53.5±1 km. Deeper and shallower Moho is found under the western and eastern stations beneath SHB and SRB stations respectively. The northwest Iran's crust has an average Vp/Vs ratio of 1.76, with higher ratio of 1.82±0.03 in Tabriz station and lower ratio of 1.73±0.03 in Azarshahr station.
 
Keyword(s): RECEIVER FUNCTION (RF), SHORT PERIOD, CRUSTAL THICKNESS, TELESEISMIC, MOHO DISCONTINUITY, VP/VS RATIO
 
 
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APA: Copy

TAGHIZADEH FARAHMAND, F., & SODOUDI, F., & GHEITANCHI, M., & KAVIANI, A. (2010). CRUSTAL STRUCTURE BENEATH NORTHWEST IRAN USING TELESEISMIC CONVERTED WAVES. GEOSCIENCES, 19(74), 131-136. https://www.sid.ir/en/journal/ViewPaper.aspx?id=274965



Vancouver: Copy

TAGHIZADEH FARAHMAND F., SODOUDI F., GHEITANCHI M.R., KAVIANI A.. CRUSTAL STRUCTURE BENEATH NORTHWEST IRAN USING TELESEISMIC CONVERTED WAVES. GEOSCIENCES. 2010 [cited 2022August17];19(74):131-136. Available from: https://www.sid.ir/en/journal/ViewPaper.aspx?id=274965



IEEE: Copy

TAGHIZADEH FARAHMAND, F., SODOUDI, F., GHEITANCHI, M., KAVIANI, A., 2010. CRUSTAL STRUCTURE BENEATH NORTHWEST IRAN USING TELESEISMIC CONVERTED WAVES. GEOSCIENCES, [online] 19(74), pp.131-136. Available: https://www.sid.ir/en/journal/ViewPaper.aspx?id=274965.



 
 
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