Яндекс.Метрика

A.M.Korzhenkov, E.V. Deev, I.V. Turova,S.V.Abdieva,S.S.Ivanov,J.Liu,I.V.Mazeika,E.A.Rogozhin,A.A.Strelnikov,A.B.Fortuna,M.T.Usmanova

Выпуск: 3 , Том: 62 , Год издания: 2021
Сериальное издание: Russian Geology and Geophysics
Страницы: 263-277

Аннотация

The Malyi Orgochor, Orgochor, Birbash, Sukhoi Ridge, Ichketosma, and Tosma uplifts in the eastern Issyk-Kul basin are fault-related anticlinal folds composed of Neogene and Quaternary sediments involved in tectonic movements. The folds have asymmetric transversal profiles, with low-angle southern limbs and steep northern limbs cut by segments of the South Issyk-Kul and Karkara reverse faults reactivated in the late Quaternary. The location and geometry of the two faults, which both show reverse and left-lateral strike slip components, correspond to neotectonic propagation of deformation from the Terskey-Ala-Too Range over almost the whole eastern Issyk-Kul basin. Judging by primary and secondary coseismic surface deformation in the area, the South Issyk-Kul and Karkara faults repeatedly generated large earthquakes (M 鞕 7, I 鞕 9) in the Late Pleistocene and Holocene. According to trenching results, the historical earthquakes that occurred in the first and 10-11th centuries accommodated motions on the South Issyk-Kul fault. The new seismotectonic and paleoseismicity data from the eastern Issyk-Kul basin provide updates to its seismic potential.

Оригинал статьи
индекс в базе ИАЦ: 036551