Click for new scientific resources and news about Corona[COVID-19]

Paper Information

Journal:   GEOSCIENCES   WINTER 2010 , Volume 19 , Number 74; Page(s) 45 To 50.
 
Paper: 

MOHO DEPTH VARIATIONS AND VP/VS RATIO IN NORTHWEST OF ZAGROS (KERMANSHAH REGION) USING TELESEISMIC RECEIVER FUNCTIONS

 
 
Author(s):  AFSARI N.*, SODOUDI F., GHEITANCHI M.R., KAVIANI A.
 
* ISLAMIC AZAD UNIVERSITY (IAU), SCIENCE AND RESEARCH BRANCH, TEHRAN, IRAN
 
Abstract: 

Characterization of the detailed structure of the crust and upper mantel is an important continuing goal of geophysical studies. Teleseismic body waveforms have been used to infer crust and upper mantel structure. In this study we use teleseismic receiver function method to determine the crustal thickness and Vp/Vs ratio under Kermanshah network in north-west of Zagros using teleseismic data (30o<D<95o, mb³5.5) which have been recorded at five short-period three component stations (2003-2007). The differential travel time between the incident P wave and P to S converted wave (delay time) is used for computation of crustal thickness. Moho depth is not sensitive to crustal P velocity but there is a trade off between Moho depth and Vp/Vs ratio. The ambiguity can be reduced by incorporating the later multiple converted phases, namely, PpPs and PpSs + PsPs. We use the method of Zhu and Kanamori (2000). This method performs a grid search through the Hand Vp/Vs space and searches for the largest summed amplitudes at the predicted times of direct conversions and multiples. By stacking receiver functions from different distances and directions, effects of lateral structural variation are suppressed and an average crustal thickness is obtained. Applying this method to five short period stations in Kermanshah reveals that the Moho depth is 42 km and varies between 36 and 51.5 km. The thinnest crust was found beneath DHR, whereas the deepest crust was observed beneath VIS. We observed that Moho depth increase from west to east (from DHR to VIS) then decrease to KOM. The average Vp/Vs ratio as estimated is about 1.76.

 
Keyword(s): MOHO, TELESEISMIC RECEIVER FUNCTION, STACKING, ZAGROS
 
 
References: 
  • Not Registered.
  •  
  •  
 
Citations: 
  • Not Registered.
 
+ Click to Cite.
APA: Copy

AFSARI, N., & SODOUDI, F., & GHEITANCHI, M., & KAVIANI, A. (2010). MOHO DEPTH VARIATIONS AND VP/VS RATIO IN NORTHWEST OF ZAGROS (KERMANSHAH REGION) USING TELESEISMIC RECEIVER FUNCTIONS. GEOSCIENCES, 19(74), 45-50. https://www.sid.ir/en/journal/ViewPaper.aspx?id=274885



Vancouver: Copy

AFSARI N., SODOUDI F., GHEITANCHI M.R., KAVIANI A.. MOHO DEPTH VARIATIONS AND VP/VS RATIO IN NORTHWEST OF ZAGROS (KERMANSHAH REGION) USING TELESEISMIC RECEIVER FUNCTIONS. GEOSCIENCES. 2010 [cited 2021August01];19(74):45-50. Available from: https://www.sid.ir/en/journal/ViewPaper.aspx?id=274885



IEEE: Copy

AFSARI, N., SODOUDI, F., GHEITANCHI, M., KAVIANI, A., 2010. MOHO DEPTH VARIATIONS AND VP/VS RATIO IN NORTHWEST OF ZAGROS (KERMANSHAH REGION) USING TELESEISMIC RECEIVER FUNCTIONS. GEOSCIENCES, [online] 19(74), pp.45-50. Available: https://www.sid.ir/en/journal/ViewPaper.aspx?id=274885.



 
 
Persian Abstract Yearly Visit 58
 
 
Latest on Blog
Enter SID Blog