THE CRUSTAL STRUCTURE BENEATH THE IRANIAN PLATEAU FROM JOINT INVERSION OF RECEIVER FUNCTIONS AND SURFACE WAVES DISPERSION

سال انتشار: 1386
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 1,530

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شناسه ملی سند علمی:

SEE05_453

تاریخ نمایه سازی: 25 شهریور 1385

چکیده مقاله:

A combined inversion of body wave receiver functions and Rayleigh wave phase velocities increases the uniqueness of the solution over separate inversions and also facilitates explicit parameterization of layer thickness in the model space. However, receiver functions are mostly sensitive to sharp velocity contrasts, and relatively insensitive to the average velocity and to smooth velocity gradients. Group velocity dispersion is sensitive to average shear velocity over a broad range of depths between two seismic stations. While extremely useful for determining the general velocity profile with depth, dispersion techniques are largely insensitive to velocity discontinuities. Combining these complimentary tools in a single inversion allows for more unique analyses of crustal and upper mantle structure and increases the uniqueness of the solution over separate inversions and also facilitates explicit parameterization of layer thickness in the model space. More than one year of teleseismic waveforms recorded by 11 broad band stations of Iranian National Seismic Network (INSN) were used to study structure and thickness of the crust in different parts of Iran by joint inversion of receiver functions and regional surface wave group velocities. Information about the group velocity dispersion comes from tomographic images between 15 and 100 s period produced by a study of regional fundamental mode Rayleigh waves propagating across Iran and surrounding regions (Rham et al., 2006). The preliminary results indicate an average crustal thickness which differs from 35 km beneach MAKU station in NW of Iran up to 55 km beneath most of the INSN stations. A Moho depth of 35 (+/-2) km beneath the MAKU station located in NW of Iran, consistent with gravity studies (Dehghani and Makris, 1984) and previous results (Tatar, 2001), indicates on existing of a thin crust in this part of Iran.

نویسندگان

Nasrabadi

International Institute of Earthquake Engineering and Seismology, Tehran, Iran

Tatar

International Institute of Earthquake Engineering and Seismology, Tehran, Iran

Priestley

Bullard Laboratories, Cambridge CB۳ OEZ, UK

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  • Aki, K., & Richard, P.G. 2002. Quantitative Seismology, Freeman, San ...
  • Allen, M., Jackson, J., and Walker, R. 2004. Late Cenozoic ...
  • Ammon, C. J., Randall, G. E. and Zandt, G. 1990. ...
  • Ammon, G.J. 1991. The isolation of receiver effects from teleseismic ...
  • Berberian, M., 1995. Master blind thrust faults hidden umder the ...
  • Clitheroe, G., Gudmunds son, O. and Kennett, B.L.N. 2000. Sedimentary ...
  • Hatzfeld, D., Tatar, M., Priestley, K. and Ghafory-A shtiany, M., ...
  • Javan Doloei, G., Roberts, R., 2003. Crust and uppermost mantle ...
  • Julia, J., Ammon, C.J., Hermann, R.B. and Correig, A.M. (2000). ...
  • Langston, C.A. 1979. Structure under Mount Rainier, Washington, The inferred ...
  • Levin, V., and Park J. 1997. Crustal anisotropy in the ...
  • Mangino, S. and Priestley, K., 1998. The crustal structure of ...
  • Ozalaybey, S., Savage, M.K., Sheehan, A.F., Louie, J.N. and Brune, ...
  • Paul, A. Kaviani, A., Hatzfeld, D., Vergne, J., Mokhtari, M., ...
  • Snyder, D.B. and Barazangi, M., 1986. Deep crustal structure and ...
  • Tatar M. (2001). Etude _ i smotectonique de deux zones ...
  • Udias, A. 1999. Principles of Seismology, Cambridge University Press. ...
  • Vernant, P., Nilforoushan, F., Hatzfeld, D., Abbassi, M., Vigny, C., ...
  • Zandt, G. and Ammon, C. J. 1995. Continental Crustal composition ...
  • Zhu, L., and Kanamori, H., 2000. Moho Depth Variation in ...
  • نمایش کامل مراجع