Research output: Contribution to journal › Article › peer-review
Active tectonics and paleoseismicity of the eastern issyk-kul basin (Kyrgyzstan, Tien Shan). / Korzhenkov, A. M.; Deev, E. V.; Turova, I. V. et al.
In: Russian Geology and Geophysics, Vol. 62, No. 3, 03.2021, p. 263-277.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Active tectonics and paleoseismicity of the eastern issyk-kul basin (Kyrgyzstan, Tien Shan)
AU - Korzhenkov, A. M.
AU - Deev, E. V.
AU - Turova, I. V.
AU - Abdieva, S. V.
AU - Ivanov, S. S.
AU - Liu, J.
AU - Mažeika, I. V.
AU - Rogozhin, E. A.
AU - Strelnikov, A. A.
AU - Fortuna, A. B.
AU - Usmanova, M. T.
N1 - Funding Information: The study was supported by the Russian Foundation for Basic Research (Projects 19-55-53017_GFEN_a, 18-55-41005_Uzb_t) and grant G-2153 of the International Research Center. It was carried out as part of the State Research Program at the O.Yu. Schmidt Institute of Physics of the Earth (Moscow) and the Trofimuk Institute of Petroleum Geology and Geophysics (Novosibirsk). Publisher Copyright: © 2021, V.S. Sobolev IGM, Siberian Branch of the RAS. Copyright: Copyright 2021 Elsevier B.V., All rights reserved.
PY - 2021/3
Y1 - 2021/3
N2 - 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 ≥ 7, I ≥ 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 paleo-seismicity data from the eastern Issyk-Kul basin provide updates to its seismic potential.
AB - 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 ≥ 7, I ≥ 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 paleo-seismicity data from the eastern Issyk-Kul basin provide updates to its seismic potential.
KW - Eastern Issyk-Kul basin
KW - Fault scarps
KW - Intrabasinal uplifts
KW - Karkara fault
KW - Large paleoearthquakes
KW - Northern Tien Shan
KW - Seismites
KW - South Issyk-Kul fault
UR - http://www.scopus.com/inward/record.url?scp=85105001718&partnerID=8YFLogxK
U2 - 10.2113/RGG20194125
DO - 10.2113/RGG20194125
M3 - Article
AN - SCOPUS:85105001718
VL - 62
SP - 263
EP - 277
JO - Russian Geology and Geophysics
JF - Russian Geology and Geophysics
SN - 1068-7971
IS - 3
ER -
ID: 28498780