Физика ЗемлиФизика Земли0002-3337The Russian Academy of Sciences1265210.31857/S0002-33372019358-70Research ArticleSurface wave tomography of the arctic from seismic Rayleigh and Love wave group velocity dispersion dataSeredkinaL. V.ale@crust.irk.ruInstitute of the Earth’s Crust, Siberian Branch, Russian Academy of Sciences, Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation, Russian Academy of Sciences100520193587010052019Copyright © 2019, Russian academy of sciences2019<p style="text-align: justify;">The results of studying the deep structure of the Earths crust and upper mantle of the Arctic from surface wave data are presented. For this purpose, based on the frequency-time analysis procedure, a representative dataset of group velocity dispersion curves of seismic Rayleigh and Love waves (1555 and 1265 paths, respectively) in the period range from 10 to 250 s is obtained. With the use of a two-dimensional tomography technique for a spherical surface, group velocity distributions are calculated at separate periods. Overall, 18 maps for each type of surface waves are constructed and the horizontal resolution of the mapping is estimated. For four tectonically different regions of the Arctic, the dispersion curves calculated from the tomography results are inverted for the velocity sections of the SV- and SH-waves. Based on the obtained distributions, the main large-scale features are analyzed in the deep structure of the Earths crust and upper mantle of the Arctic, and the revealed velocity irregularities are correlated to various geological structures. The results of the study are of considerable interest for further constructing the three-dimensional model of the shear wave velocity distributions and for studying the anisotropic properties of the upper mantle of the Arctic, as well as for building the geodynamical models of the region.</p>surface wave tomographygroup velocitiesRayleigh and Love wavesupper mantleArcticповерхностно-волновая томографиягрупповые скоростиволны Рэлея и Ляваверхняя мантияАрктика[Зоненшайн Л.П., Натапов Л.М. Тектоническая история Арктики. Актуальные проблемы тектоники. М.: Наука. 1987. С. 31–57.][Зоненшайн Л.П., Кузьмин М.И., Натапов Л.М. Тектоника литосферных плит территории СССР. М.: Недра. 1990. Кн. 2. 334 с.][Имаева Л.П., Колодезников И.И. (ред.) Сейсмотектоника северо-восточного сектора Российской Арктики. Новосибирск: изд-во СО РАН. 2017. 136 с.][Левшин А.Л., Яновская Т.Б., Ландер А.В., Букчин Б.Г., Бармин М.П., Ратникова Л.И., Итс Е.Н. 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