1887

Abstract

Summary

To better understand the deep structure of the Eastern Pontides orogenic belt (NE Turkey), we have just analyzed the teleseismic-records of the KTUT station as an initial study. For this purpose, P and S Receiver Functions are calculated, and then inverted jointly together with teleseismic P and S traveltime residuals. The inversion is performed using a simulated annealing technique. No high-quality signal is observed at the KTUT station for the Ps converted phase from P410s and P660s km discontinuity. An early arrival is observed at this station for P410s which is ∼0.5 s than the IASP91 global model. The crust has a thickness of about 34 km, and the high-S-velocity mantle lid is beneath the crust at a depth of about 65 km. The velocities of Vs and Vp in the crust are close to Vs= ∼3.61 km/s and Vp= ∼6.37 km/s, respectively. The S wave velocity decreases to ∼4.22 km/s at the low-S-velocity zone beneath the crust, and it reaches to ∼4.65 km/s at upper mantle. Consequently, the crust and upper mantle thicknesses derived from the receiver functions analyses are in good agreement with results from other studies.

Loading

Article metrics loading...

/content/papers/10.3997/2214-4609.201702517
2017-11-05
2024-04-18
Loading full text...

Full text loading...

References

  1. Berkhout, A.J.
    (1977). Least square inverse filtering and wavelet deconvolution. Geophysics, 42, 1369–1383.
    [Google Scholar]
  2. Berteussen, K. A.
    (1977). Moho depth determinations based on spectral ratio analysis of NORSAR long-period P waves. Phys. Earth Planet. Int., 15, 13–27.
    [Google Scholar]
  3. Biswas, N.N.
    (1972). Earth-flattening procedure for the propagation of Rayleigh wave. Pure Appl. Geophys., 96, 61–74.
    [Google Scholar]
  4. Chevrot, S., Vinnik, L., Montagner, J.P.
    (1999). Global scale analysis of the mantle Pds phases. J. Geophys. Res., 104, 203–219.
    [Google Scholar]
  5. Çakır, Ö., Erduran, M., Çinar, H., Yılmaztürk, A.
    (2000). Forward modeling receiver functions for crustal structure beneath station TBZ (Trabzon, Turkey). Geophysical Journal International, 140,341–356.
    [Google Scholar]
  6. Çakır, Ö. and Erduran, M.
    (2004). Constraining crustal and uppermost structure beneath station TBZ (Trabzon, Turkey) by receiver function and dispersion analyses. Geophysical Journal International, 158, 955–971.
    [Google Scholar]
  7. Çınar, H. and Alkan, H.
    (2016). Crustal S-wave structure beneath Eastern Black Sea Region revealed by Rayleigh-wave group velocities. Journal of Asian Earth Sciences, 115, 273–284.
    [Google Scholar]
  8. Eyüboğlu, Y., Bektaş¸, O., Pul, D.
    (2007). Mid-Cretaceous olistostromal ophiolitic melange developed in the back-arc basin of the eastern Pontide magmatic arc (NE Turkey). International Geology Review, 49, 1103–1126.
    [Google Scholar]
  9. Farra, V. and Vinnik, L.
    (2000). Upper mantle stratification by P and S receiver functions. Geophys. J. Int., 141, 699–712.
    [Google Scholar]
  10. Haskell, N.A.
    (1962). Crustal reflection of plane P and SV waves. J. Geophys.Res., 67, 4751–4767.
    [Google Scholar]
  11. Kiselev, S., Vinnik, L., Oreshin, S., Gupta, S., Rai, S.S., Singh, A., Kumar, M.R., Mohan, G.
    (2008). Lithosphere of the Dharwar craton by joint inversion of P and S receiver functions. Geophys. J. Int., 173, 1106–1118.
    [Google Scholar]
  12. Maden, N., Gelişli, K., Bektaş, O., Eyüboğlu, Y.
    (2009). Two-and-three-dimensional crust topography of the Eastern Pontides (NE Turkey). Turkish Journal of Earth Sciences, 18, 225–238.
    [Google Scholar]
  13. Morais, L., Vinnik, V., Silveira, G., Kiselev, S. and Matias, L.
    (2015). Mantle beneath the Gibraltar Arc from receiver functions. Geophys. J. Int., 200, 1153–1169.
    [Google Scholar]
  14. Mosegaard, K. and Vestergaard, P.D.
    (1991). A simulated annealing approach to seismic model optimization with sparse prior information. Geophys.Prospect., 39, 599–611.
    [Google Scholar]
  15. Mosegaard, K. and TarantolaA.
    (1995). Monte Carlo sampling of solutions to inverse problems. Journal of Geophysical Research, 100, 431–447.
    [Google Scholar]
  16. Oreshin, S.I, Vinnik, L.P., Kiselev, S.G., Rai, S.S., Prakasam, K.S., Treussov, A.V.
    (2011). Deep seismic structure of the Indian shield, western Himalaya,Ladakh and Tibet. Earth and Planetary Science Letters, 307, 415–429.
    [Google Scholar]
  17. Vinnik, L.P.
    (1977). Detection of waves converted from P to SV in the mantle. Phys. Earth Planet. Inter., 583, 15, 3945.
    [Google Scholar]
http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201702517
Loading
/content/papers/10.3997/2214-4609.201702517
Loading

Data & Media loading...

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error