Dispersion of group velocities of Rayleigh and Love waves and anisotropic properties of the Asian continent |
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| Authors: | AI Seredkina VM Kozhevnikov OA Solovei |
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| Institution: | Institute of the Earth’s Crust, Siberian Branch of the Russian Academy of Sciences, ul. Lermontova 128, Irkutsk, 664033, Russia |
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| Abstract: | We have studied the structures of the Earth’s crust and upper mantle of the Asian continent using a representative sample of dispersion curves of group velocities of fundamental-mode Rayleigh and Love waves for more than 3200 seismic paths. Maps of distributions of variations in group velocities with periods of 10 to 250 s over a spherical surface were calculated by the 2D tomography method. The maps reflect the deep structure of the Earth’s crust and upper mantle of the study area and give a tentative idea of the horizontal distribution of the anisotropic properties of the mantle matter. The obtained data are confirmed by the calculations of the velocity profiles of SV- and SH-waves for the entire Asian continent and for its regions. Vertically, anisotropy is observed to the depths of ~ 250 km, with its maximum in the depth range from the bottom of the crust to 150 km. |
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| Keywords: | Rayleigh and Love waves group velocities surface wave tomography radial anisotropy Asian continent |
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