Article : Lithospheric structure of the Arabian Shield from joint inversion of P- and S-wave receiver functions and dispersion velocities
Authors : Wójcik, K.Polish Geological Institute – National Research Institute, Rakowiecka 4, PL-00-864 Warsaw, Poland, email@example.com, Matyszkiewicz, J.AGH University of Science and Technology; Faculty of Geology, Geophysics and Environment Protection, al. Mickiewicza 30; 30-059 Kraków, firstname.lastname@example.org, Kochman, A.AGH University of Science and Technology; Faculty of Geology, Geophysics and Environment Protection, al. Mickiewicza 30; 30-059 Kraków, email@example.com, Rzepa, G.AGH University of Science and Technology; Faculty of Geology, Geophysics and Environment Protection, al. Mickiewicza 30; 30-059 Kraków, firstname.lastname@example.org, Gołębiowska, B.AGH University of Science and Technology; Faculty of Geology, Geophysics and Environment Protection, al. Mickiewicza 30; 30-059 Kraków, email@example.com, Krajewski, M.AGH University of Science and Technology; Faculty of Geology, Geophysics and Environment Protection, al. Mickiewicza 30; 30-059 Kraków, firstname.lastname@example.org, Gaidzik, K.University of Silesia in Katowice, Faculty of Earth Sciences, ul. Będzińska 60; 41-200 Sosnowiec, Poland, email@example.com, Żaba, J.University of Silesia in Katowice, Faculty of Earth Sciences, ul. Będzińska 60; 41-200 Sosnowiec, Poland, firstname.lastname@example.org, Worobiec, G.Department of Palaeobotany, W. Szafer Institute of Botany PAS, Lubicz 46, PL-31-512 Kraków, Poland, email@example.com, Jach, R.Institute of Geological Sciences, Jagiellonian University, Oleandry 2a, PL-30-063 Kraków, Poland, firstname.lastname@example.org, Machaniec, E.Institute of Geological Sciences, Jagiellonian University, Oleandry 2a, PL-30-063 Kraków, Poland, email@example.com, Uchman, A.Institute of Geological Sciences, Jagiellonian University, Oleandry 2a, PL-30-063 Kraków, Poland, firstname.lastname@example.org, Worobiec, E.Department of Palaeobotany, W. Szafer Institute of Botany PAS, Lubicz 46, PL-31-512 Kraków, Poland, email@example.com, Al-Amri, A. M.Department of Geology & Geophysics, King Saud University, Riyadh, Saudi Arabia, firstname.lastname@example.org,
Abstract : New velocity models of lithospheric thickness and velocity structure have been developed for the Arabian Shield by three tasks: 1) Computing P-Wave Receiver Functions (PRFs) and S-Wave Receiver Functions (SRFs) for all the broadband stations within the Saudi seismic networks. The number of receiver function waveforms depends on the recording time window and quality of the broadband station. 2) Computing ambient noise correlation Green’s functions for all available station pairs within the Saudi seismic networks to image the shear velocity in the crust and uppermost mantle beneath the Arabian Peninsula. Together they provided hundreds of additional, unique paths exclusively sampling the region of interest. Both phase and group velocities for all the resulting empirical Green’s functions have been measured and to be used in the joint inversion. 3) Jointly inverted the PRFs and SRFs obtained in task 1 with dispersion velocities measured on the Green’s functions obtained in task 2 and with fundamental-mode, Rayleigh-wave, group and phase velocities borrowed from the tomographic studies to precisely determine 1D crustal velocity structure and upper mantle. The analysis of the PRFs revealed values of 25 – 45 km for crustal thickness, with the thin crust next to the Red Sea and Gulf of Aqaba and the thicker crust under the platform, and Vp/Vs ratios in the 1.70 – 1.80 range, suggesting a range of compositions (felsic to mafic) for the shield’s crust. The migrated SRFs suggest lithospheric thicknesses in the 80-100 km range for portions of the shield close to the Red Sea and Gulf of Aqaba and near the Arabian Gulf. Generally, the novelty of the velocity models developed under this paper has consisted in the addition of SRF data to extend the velocity models down to lithospheric and sub-lithospheric depths.
Publishing house : Faculty of Geology of the University of Warsaw
Publication date : 2015
Number : Vol. 65, no. 2
Page : 227 – 243
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Qute : Wójcik, K. ,Matyszkiewicz, J. ,Kochman, A. ,Rzepa, G. ,Gołębiowska, B. ,Krajewski, M. ,Gaidzik, K. ,Żaba, J. ,Worobiec, G. ,Jach, R. ,Machaniec, E. ,Uchman, A. ,Worobiec, E. ,Al-Amri, A. M. ,Al-Amri, A. M. , Lithospheric structure of the Arabian Shield from joint inversion of P- and S-wave receiver functions and dispersion velocities. Acta Geologica Polonica Vol. 65, no. 2/2015