Evaluation of present-day deformations in the Amurian Plate and its surroundings, based on GPS data

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• 作者：S.V. Ashurkov^a ; ^f ; ^{ashurkov@crust.irk.ru" class="auth_mail" title="E-mail the corresponding author} ; V.A. San&rsquo ; kov^a ; ^g ; M.A. Serov^b ; P.Yu. Luk&rsquo ; yanov^c ; N.N. Grib^d ; G.S. Bordonskii^c ; M.G. Dembelov^e
• 关键词：present-day crustal movements ; crustal deformations ; GPS measurements ; Amurian Plate
• 刊名：Russian Geology and Geophysics
• 出版年：2016
• 出版时间：November 2016
• 年：2016
• 卷：57
• 期：11
• 页码：1626-1634
• 全文大小：4493 K

文摘

We analyze recent crustal movements, based on data of GPS measurements on the Amurian Plate and its margins. Most of the velocities were borrowed from scientific publications. Also, our new and updated data of periodic and permanent GPS observations are presented. A continuous field of strain rates has been constructed using the combined field of movement velocities. Dilatation rates and the directions and values of the main strain axes have been calculated. We have made a quantitative estimation of the maximum shear rates and their directions. Zones of background deformations in the inner part of the Amurian Plate have been revealed along with high-strain zones. Zones with intense tectonic activity, corresponding to areas of reduced lithosphere, often show manifestations of Late Cenozoic volcanism. Part of them can be interpreted as the present-day boundaries of intracontinental geoblocks and small lithospheric plates.