gtcrustГеодинамика и тектонофизикаGeodynamics & Tectonophysics2078-502XInstitute of the Earth's crust of the Russian Academy of Sciences, Siberian Branch10.5800/GT-2022-13-5-0675gtcrust-1586Research ArticleСОВРЕМЕННАЯ ГЕОДИНАМИКАRECENT GEODYNAMICSГЕОДИНАМИЧЕСКАЯ МОДЕЛЬ ВЗАИМОДЕЙСТВИЯ ЗОНЫ СУБДУКЦИИ С КОНТИНЕНТАЛЬНОЙ ЛИТОСФЕРОЙ В ОБЛАСТИ ПЕРЕХОДА ОТ ТИХОГО ОКЕАНА К ВОСТОЧНОЙ АЗИИGEODYNAMIC MODEL OF THE INTERACTION OF THE SUBDUCTION ZONE WITH THE CONTINENTAL LITHOSPHERE IN THE AREA OF TRANSITION BETWEEN THE PACIFIC OCEAN AND EAST ASIAЛобковскийЛ. И.LobkovskyL. I.

117997, Москва, пр-т Нахимовский, 36

141701, Долгопрудный, Институтский пер., 9

36 Nahimovskiy Ave, Moscow 117997

9 Institutskiy Ln, Dolgoprudny 141701

ГабсатаровЮ. В.GabsatarovY. V.

141701, Долгопрудный, Институтский пер., 9

249035, Обнинск, пр-т Ленина, 189

9 Institutskiy Ln, Dolgoprudny 141701

189 Lenin Ave, Obninsk 249035

АлексеевД. А.AlekseevD. A.

141701, Долгопрудный, Институтский пер., 9

249035, Обнинск, пр-т Ленина, 189

36 Nahimovskiy Ave, Moscow 117997

9 Institutskiy Ln, Dolgoprudny 141701

ВладимироваИ. С.VladimirovaI. S.

141701, Долгопрудный, Институтский пер., 9

249035, Обнинск, пр-т Ленина, 189

9 Institutskiy Ln, Dolgoprudny 141701

189 Lenin Ave, Obninsk 249035

РамазановМ. М.RamazanovM. M.

367030, Махачкала, пр-т И. Шамиля, 39а, Республика Дагестан

39а Shamil Ave, Makhachkala 367030, Republic of Dagestan

КотелкинВ. Д.KotelkinV. D.

119991, Москва, Ленинские горы, 1

1 Leninskie Gory, Moscow 119991

Институт океанологии им. П.П. Ширшова РАН; Московский физико-технический институтРоссияShirshov Institute of Oceanology, Russian Academy of Sciences; Moscow Institute of Physics and TechnologyRussian FederationМосковский физико-технический институт; ФИЦ «Единая геофизическая служба РАН»РоссияMoscow Institute of Physics and Technology; Geophysical Survey of the Russian Academy of SciencesRussian FederationМосковский физико-технический институт; ФИЦ «Единая геофизическая служба РАН»РоссияShirshov Institute of Oceanology, Russian Academy of Sciences; Moscow Institute of Physics and TechnologyRussian FederationИнститут проблем геотермии и возобновляемой энергетики, филиал Объединенного института высоких температур РАНРоссияInstitute for Geothermal Research and Renewable Energy, Branch of Joint Institute for High Temperatures of the Russian Academy of SciencesRussian FederationМосковский государственный университет им. М.В. ЛомоносоваРоссияLomonosov Moscow State UniversityRussian Federation202210122022135675675Copyright © Лобковский Л.И., Габсатаров Ю.В., Алексеев Д.А., Владимирова И.С., Рамазанов М.М., Котелкин В.Д., 20222022Лобковский Л.И., Габсатаров Ю.В., Алексеев Д.А., Владимирова И.С., Рамазанов М.М., Котелкин В.Д.Lobkovsky L.I., Gabsatarov Y.V., Alekseev D.A., Vladimirova I.S., Ramazanov M.M., Kotelkin V.D.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://www.gt-crust.ru/jour/article/view/1586

Регион Восточной Азии характеризуется сложным геологическим строением и высокой сейсмической и тектонической активностью. Данные спутниковой геодезии, отражающие современные движения земной поверхности региона, демонстрируют существенную изменчивость по величине и направлению как вдоль простирания островодужных окраин, так и в глубь континента. В работе для объяснения аномалий поля смещений земной поверхности предлагается геодинамическая модель Восточной Азии, учитывающая механизм взаимодействия континентальной литосферы региона и переходной зоны континент – океан вдоль Курило-Камчатской и Японской островных дуг. Представленная концепция включает в себя модель верхнемантийной конвективной ячейки, развивающейся под континентальной литосферой, в сочетании с клавишно-блоковой моделью, объясняющей закономерности сейсмического цикла в островодужных окраинах. Показано, что учет взаимодействия литосферы и верхней мантии в зоне перехода континент – океан позволяет в рамках модели нестационарной конвективной ячейки объяснить наблюдающиеся на удалении до 2000 км современные движения земной поверхности и данные сейсмической томографии без привлечения дополнительных литосферных блоков. Модель способствует развитию физически обоснованного геодинамического подхода к анализу современной тектоники и позволяет устранить противоречия между наблюдаемыми данными и классической тектоникой плит в регионе Восточной Азии.

East Asia is the vast region of Asia which is characterized by a complex geological structure and high activity of seismic and tectonic processes. Satellite geodetic data, reflecting the recent crustal movements in the region, demonstrate a considerable variability in magnitude and direction of motions both along the strike of island-arc margins and deep into the continent. To explain the anomalies in the Earth's surface displacement field, the paper proposes a geodynamic model of East Asia which involves the mechanism of interaction between the continental lithosphere of the region and the continent-to-ocean transition area along the Kuril-Kamchatka and Japanese island arcs. The proposed concept includes the model of the upper-mantle convective cell, developing beneath the continental lithosphere, in combination with the keyboard-block model explaining the regularities of seismic cycle in the island-arc margins. It has been shown that the consideration of interaction between the lithosphere and upper mantle in the continent-to-ocean transition area in the framework of the model of non-stationary convective cell allows us to explain the recent crustal movements observed up to a distance of 2000 km and the seismic tomography data without involving additional lithospheric blocks. The model contributes to the development of the physically grounded geodynamic approach to the analysis of recent tectonics and eliminates the inconsistencies between the observed data and classical plate tectonics in East Asia.

Восточная Азиягеодинамический процесссильнейшее землетрясениемантийная конвекциясубдукционная зонасейсмический циклсовременные движения земной поверхностиспутниковая геодезиячисленное моделированиеEast Asiageodynamic processlargest earthquakemantle convectionsubduction zoneseismic cyclerecent earth’s surface displacementssatellite geodesynumerical modelingИсследование выполнено при поддержке Российского научного фонда (проект № 20-17-00140).The study was conducted with the financial support of the Russian Science Foundation (project 20-17-00140).ReferencesAltamimi Z., Rebischung P., Métivier L., Collilieux X., 2016. ITRF2014: A New Release of the International Terrestrial Reference Frame Modeling Nonlinear Station Motions. Journal of Geophysical Research: Solid Earth 121 (8), 6109–6131. https://doi.org/10.1002/2016JB013098.Altamimi Z., Rebischung P., Métivier L., Collilieux X., 2016. 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The authors declare that there are no conflicts of interest present.