gtcrustГеодинамика и тектонофизикаGeodynamics & Tectonophysics2078-502XInstitute of the Earth's crust of the Russian Academy of Sciences, Siberian Branch10.5800/GT-2018-9-3-0380gtcrust-634Research ArticleСОВРЕМЕННАЯ ГЕОДИНАМИКАRECENT GEODYNAMICSГЕОДИВАЙДЕР 102–103° В.Д. В СОВРЕМЕННОЙ СТРУКТУРЕ ЛИТОСФЕРЫ ЦЕНТРАЛЬНОЙ АЗИИTHE 102–103° E GEODIVIDER IN THE MODERN LITHOSPHERE STRUCTURE OF СENTRAL ASIAhttps://orcid.org/0000-0001-7225-7073ГатинскийЮ. Г.GatinskyYu. G.

Юрий Георгиевич Гатинский, докт. геол.-мин. наук 

125009, Москва, ул. Моховая, 11, стр. 11

Yuri G. Gatinsky, Doctor of Geology and Mineralogy 

11 Mokhovaya street, building 11, Moscow 125009

gatinsky@gmail.comПрохороваТ. В.ProkhorovaT. V.

Татьяна Викторовна Прохорова 

117997, Москва, ул. Профсоюзная, 84/32

Tatiana V. Prokhorova 

84/32 Profsoyuznaya street, Moscow 117997

tatprokh@mitp.ruhttps://orcid.org/0000-0001-8428-5936РундквистД. В.RundquistD. V.

Дмитрий Васильевич Рундквист, докт. геол.-мин. наук, академик РАН

125009, Москва, ул. Моховая, 11, стр. 11

Dmitriy V. Rundquist, Doctor of Geology and Mineralogy, Academician of RAS

11 Mokhovaya street, building 11, Moscow 125009

dvr@sgm.ruГосударственный геологический музей им. В.И. Вернадского РАНРоссияV.I. Vernadsky State Geological Museum of RASRussian FederationИнститут теории прогноза землетрясений и математической геофизики РАНРоссияInstitute of Earthquake Prediction Theory and Mathematical Geophysics RASRussian Federation20180910201893989–1006Copyright © Гатинский Ю.Г., Прохорова Т.В., Рундквист Д.В., 20182018Гатинский Ю.Г., Прохорова Т.В., Рундквист Д.В.Gatinsky Y.G., Prokhorova T.V., Rundquist D.V.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/634

Квазилинейная зона заметных геологических и геофизических изменений совпадает приблизительно с меридианами 102–103° в.д. Активные субмеридиональные разломы развиты в этой зоне, названной авторами геодивайдером 102–103° в.д. Наиболее интенсивная сейсмичность характеризует центральную часть геодивайдера от озера Байкал до региона Трех рек на границе Китая и Мианмар. Проведение трансектов с глубинными сейсмическими разрезами и графиками диссипации сейсмической энергии показывает преимущественно резкое возрастание объемов сейсмической энергии и глубины гипоцентров на западном крыле геодивайдера. Геодивайдер разделяет, в первом приближении, Центрально-Азиатскую и Восточно-Азиатскую транзитные зоны между Северо-Евразийской, Индийской и Тихоокеанской литосферными плитами. Тектонический режим транспрессии преобладает к западу от геодивайдера под влиянием давления Индостанского индентора, и режим транстенсии распространен к востоку от него, благодаря глубокому погружению и продолжению Тихоокеанского слэба. Смена режимов совпадает с резким увеличением мощности коры к западу от геодивайдера от 35–40 до 45–70 км, отражающимся в геофизических полях и коровых металлогенических характеристиках. Направление P- и S-волн анизотропии наряду с данными GPS показывает их несовпадение в различных слоях коры и мантии в южной части геодивайдера. По результатам наших исследований геодивайдер 102–103° в.д. представляет собой тип геолого-геофизической границы, сопоставимой с линией Торнквиста, по масштабу с Уральским и Аппалачским фронтами и с рядом других крупных структур.

A quasi-linear zone of noticeable geological and geophysical changes, which coincides approximately with 102–103° E meridians, is termed by the authors as “geodivider”. Active submeridional faults are observed predominantly along the zone and coincide with its strike. Seismicity is most intensive in the central part of this zone, from the Lake Baikal to the Three Rivers Region at the Sino-Myanmar frontier. Transects with deep seismic sections and energy dissipation graphs show most sharply increasing seismic energy amounts and hypocenter depths in the western part of the geodivider which delimits (in the first approximation) the Central Asian and East Asian transitional zones between the North Eurasian, Indian and Pacific lithosphere plates. The transpression tectonic regime dominates west of the geodivider under the influence of the Hindustan Indentor pressure, and the transtension regime prevails east of it due to the Pacific subduction slab submergence and continuation. The regime change coincides with an abrupt increase in the crust thickness – from 35–40 km to 45–70 km – west of the geodivider, as reflected in the geophysical fields and metallogenic characteristics of the crust. The direction of P- and S-waves anisotropy together with the GPS data show decoupling layers of the crust and mantle in the southern part of the geodivider. According to our investigations, the 102–103° E geodivider is a regional geological-geophysical border that may be compared with the Tornquist Line, and, by its scale, with the Uralian and Appalachian fronts and some others large structures.

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The authors declare that there are no conflicts of interest present.