Research output: Contribution to journal › Article › peer-review
Paleoearthquakes in the Uimon basin (Gorny Altai). / Deev, E. V.; Zol'nikov, I. D.; Turova, I. V. et al.
In: Russian Geology and Geophysics, Vol. 59, No. 4, 01.04.2018, p. 351-362.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Paleoearthquakes in the Uimon basin (Gorny Altai)
AU - Deev, E. V.
AU - Zol'nikov, I. D.
AU - Turova, I. V.
AU - Rusanov, G. G.
AU - Ryapolova, Yu M.
AU - Nevedrova, N. N.
AU - Kotler, S. A.
PY - 2018/4/1
Y1 - 2018/4/1
N2 - Paleoseismological studies confirm that the Uimon basin is thrust by its northern mountain border along the active South Terekta fault. The latest motion along the fault in the 7-8th centuries AD induced an earthquake with a magnitude of Mw= 7.4-7.7 and a shaking intensity of I = 9-11 on the MSK-64 scale. The same fault generated another event (M > 7, I = 9-10), possibly, about 16 kyr ago, which triggered gravity sliding. The rockslide dammed the Uimon valley and produced a lake, where lacustrine deposition began about 14 ± 1 kyr ago, and a later M > 7 (I = 9-10) earthquake at ~ 6 ka caused the dam collapse and the lake drainage. Traces of much older earthquakes that occurred within the Uimon basin are detectable from secondary deformation structures (seismites) in soft sediments deposited during the drainage of a Late Pleistocene ice-dammed lake between 100 and 90 ka and in ~ 77 ka alluvium. The magnitude and intensity of these paleoearthquakes were at least M > 5.0-5.5 and I > 6-7.
AB - Paleoseismological studies confirm that the Uimon basin is thrust by its northern mountain border along the active South Terekta fault. The latest motion along the fault in the 7-8th centuries AD induced an earthquake with a magnitude of Mw= 7.4-7.7 and a shaking intensity of I = 9-11 on the MSK-64 scale. The same fault generated another event (M > 7, I = 9-10), possibly, about 16 kyr ago, which triggered gravity sliding. The rockslide dammed the Uimon valley and produced a lake, where lacustrine deposition began about 14 ± 1 kyr ago, and a later M > 7 (I = 9-10) earthquake at ~ 6 ka caused the dam collapse and the lake drainage. Traces of much older earthquakes that occurred within the Uimon basin are detectable from secondary deformation structures (seismites) in soft sediments deposited during the drainage of a Late Pleistocene ice-dammed lake between 100 and 90 ka and in ~ 77 ka alluvium. The magnitude and intensity of these paleoearthquakes were at least M > 5.0-5.5 and I > 6-7.
KW - Gorny Altai
KW - large paleoearthquakes
KW - paleoseismology
KW - primary and secondary seismic deformations
KW - Uimon basin
KW - DEPRESSION
KW - SEDIMENTS
KW - ZONE
KW - EMPIRICAL RELATIONSHIPS
KW - DEFORMATION
KW - MAGNITUDE
KW - ANCIENT EARTHQUAKES
KW - DEPOSITS
KW - MONGOLIA
KW - KINEMATICS
UR - http://www.scopus.com/inward/record.url?scp=85045240723&partnerID=8YFLogxK
U2 - 10.1016/j.rgg.2017.07.011
DO - 10.1016/j.rgg.2017.07.011
M3 - Article
AN - SCOPUS:85045240723
VL - 59
SP - 351
EP - 362
JO - Russian Geology and Geophysics
JF - Russian Geology and Geophysics
SN - 1068-7971
IS - 4
ER -
ID: 12542950