gtcrustГеодинамика и тектонофизикаGeodynamics & Tectonophysics2078-502XInstitute of the Earth's crust of the Russian Academy of Sciences, Siberian Branch10.5800/GT-2022-13-1-0568gtcrust-1420Research ArticleСОВРЕМЕННАЯ ГЕОДИНАМИКАRECENT GEODYNAMICSГЕОЛОГО-ГЕОФИЗИЧЕСКИЙ ТРАНСЕКТ СРЕДИННОГО ТЯНЬ-ШАНЯ ЧЕРЕЗ НАРЫНСКУЮ И АТБАШИНСКУЮ ВПАДИНЫGEOLOGICAL AND GEOPHYSICAL TRANSECT OF THE MIDDLE TIEN SHAN ACROSS THE NARYN AND ATBASHI DEPRESSIONSПржиялговскийЕ. С.PrzhiyalgovskiiE. S.

119017, Москва, Пыжевский пер., 7

Eugeny S. Przhiyalgovskii

7 Pyzhevsky Ln, Moscow 119017

prz4@yandex.ruРыбинА. К.RybinA. K.

720049, Бишкек

Bishkek 720049

МорозовЮ. А.MorozovYu. A.

123242, Москва, ул. Большая Грузинская, 10, стр. 1

10-1 Bolshaya Gruzinskaya St, Moscow 123242

ЛаврушинаЕ. В.LavrushinaE. V.

119017, Москва, Пыжевский пер., 7

7 Pyzhevsky Ln, Moscow 119017

ЛеоновМ. Г.LeonovM. G.

119017, Москва, Пыжевский пер., 7

7 Pyzhevsky Ln, Moscow 119017

БаталеваЕ. А.BatalevaE. A.

720049, Бишкек

Bishkek 720049

Геологический институт РАНРоссияGeological Institute, Russian Academy of SciencesRussian FederationНаучная станция РАНКыргызстанResearch Station, Russian Academy of SciencesKyrgyzstanИнститут физики Земли им. О.Ю. Шмидта РАНРоссияSchmidt Institute of Physics of the Earth, Russian Academy of SciencesRussian Federation202222032022131568568Copyright © Пржиялговский Е.С., Рыбин А.К., Морозов Ю.А., Лаврушина Е.В., Леонов М.Г., Баталева Е.А., 20222022Пржиялговский Е.С., Рыбин А.К., Морозов Ю.А., Лаврушина Е.В., Леонов М.Г., Баталева Е.А.Przhiyalgovskii E.S., Rybin A.K., Morozov Y.A., Lavrushina E.V., Leonov M.G., Bataleva E.A.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/1420

В статье представлены результаты комплексных геолого-геофизических исследований вдоль ключевого трансекта, пересекающего Нарынскую и Атбашинскую впадины в Срединном Тянь-Шане, которые включали детальные магнитотеллурические (МТ) зондирования и изучение морфологии и пространственного положения структур осадочного чехла и фундамента. Данные о распределении глубинной электрической проводимости коры и верхней мантии сопоставлялись с материалами сейсмического профилирования. Компиляция результатов структурно-геологического и геофизического изучения дала возможность создать 2D-модель верхнекоровой геологической структуры, согласующейся со структурой электрической проводимости коры до глубины около 10 км. Построенный детальный геологический разрез и данные структурно-геологических исследований позволяют полно охарактеризовать деформации кайнозойского осадочного комплекса и поверхности палеозойского фундамента, связанные с альпийской активизацией Тянь-Шаня. Показано, что кайнозойские структурные парагенезы возникли в течение относительно кратковременной фазы деформации и горообразования в условиях горизонтального сжатия и транспрессии, не проявившихся на стадии предшествующего прогибания.

The article presents the results of integrated geological and geophysical research works dealt with detailed magnetotelluric (MT) sounding and the study of the morphology and spatial position of the sedimentary cover and basement structures along the key transect of the Middle Tien Shan crossing the Naryn and Atbashi depressions. The data on the distribution of deep electrical conductivity of the crust and upper mantle were compared with the seismic profiling data. The compilation of the results of structural-geological and geophysical studies provided the opportunity to draw 2D upper-crust geological structure, consistent with the structure of electrical conductivity of the crust to depths of about 10 km. The detailed geological cross-sections and the structural and geological data allow us to characterize the deformations of the Cenozoic sedimentary complex and Paleozoic basement surface associated with the alpine activation of the key segment of the Tien Shan. It is shown that the Cenozoic structural parageneses emerged during a relatively short-term phase of deformation and orogeny under conditions of horizontal compression and transpression, which did not manifest themselves during sagging that occurred previously.

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