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19 results on '"Deev, Evgeny"'

3. Large paleoearthquakes and Holocene faulting in the Southeastern Gorny Altai: implications for ongoing crustal shortening in Central Asia.

Author

Deev, Evgeny V., Panin, Andrey V., Solomina, Olga N., Bricheva, Svetlana S., Borodovskiy, Andrey P., Entin, Andrey L., and Kurbanov, Redzhep N.

Subjects
*GROUND penetrating radar, *FAULT zones, *REMOTE-sensing images, *EARTHQUAKES, *RADIOCARBON dating, *SURFACE fault ruptures
Abstract

Shrinking of intermontane basins and expansion of their flanking ranges by reverse faulting and backthrusting in two counter-dipping systems is a typical mechanism of crustal shortening and mountain building in Central Asia. This mechanism is realized along the Kurai Fault Zone (southeastern Gorny Altai). Motions on two reverse fault systems maintained thrusting of the Kurai Range and the Kubadru Uplift on the Kurai Basin sediments and caused the growth of a foreberg before the mountain front. Forberg separates narrow Aktash Basin from the Kurai Basin. The paleoearthquakes were generated by reverse faults that delineate the foreberg. Analysis of the QuickBird satellite images, drone imagery, trenching, archaeoseismological research, radiocarbon dating, dendrochronology, and previous results show that eleven large (МW = 6.5–7.6) paleoearthquakes left traces as surface ruptures along the Kurai Fault Zone: twice before 7.5 ka BP, three events between 7.5 and 5.9 ka BP (7.0, 6.3, and 5.9–5.8 ka BP), one from 5.8 to 4.6 ka BP, four more at 4.6, 3.2, 1.5, and 1.3–1.2 ka BP, and the ultimate earthquake no older than 1450–1650 AD. The time difference between large earthquakes was from 200 to 1700 years. Surface faulting occurred mainly along the northern border of the foreberg where fault scarps are progressively younger northward and the Cenozoic sediments of the Aktash Basin thus become involved into uplift. GPR data to a depth of 12 m confirm the complex structure and slip geometry of the observed surface ruptures. The fault scarps are located < 1 km from the planned route of the gas pipeline from Russia to China, and the potential seismic hazard has to be taken into account in its design and construction. [ABSTRACT FROM AUTHOR]

Published
2024
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7. Large Holocene paleoseismic events and synchronized travertine formation: a case study of the Kurai fault zone (Gorny Altai, Russia).

Author

Deev, Evgeny, Dublyansky, Yuri, Kokh, Svetlana, Scholz, Denis, Rusanov, Gennady, Sokol, Ella, Khvorov, Pavel, Reutsky, Vadim, and Panin, Andrey

Subjects
*FAULT zones, *TRAVERTINE, *HOLOCENE Epoch, *RADIOCARBON dating, *LIMESTONE
Abstract

The Kurai Fault Zone (KFZ) is one of the most hazardous seismogenic structures in the Gorny Altai (Russia), which bounds the largest Kurai and Chuya intermontane basins from the north. Trenching studies, radiocarbon dating of colluvial wedge deposits, and 230Th-U dating of seismogenic travertine of the Meshtuyaryk field showed that the fault scarp in the northwestern part of the Chuya Depression was formed by earthquakes that occurred ca. 9.5, 7.7, 5.8, and 4.8–3.4 ka BP. The last two palaeoearthquakes are younger than 3.2 ka BP. The parameters of seismogenic ruptures, as well as the distances between coeval seismogenic travertines along the KFZ, yielded estimates of the Mw of the four oldest palaeoearthquakes as 6.8–7.6 and ESI 2007 shaking intensities of VIII–XI. The results of 230Th-U dating suggest that deposition of the Meshtuyaryk travertines was triggered by three strong palaeoearthquakes at ca. 9.5, 7.7, and 4.8–3.4 ka BP, which activated faults and caused a rapid rise along them of ambient-temperature bicarbonate groundwaters previously sealed in deep-seated limestone aquifers. [ABSTRACT FROM AUTHOR]

Published
2023
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19. Three different types of plumbing system beneath the neighboring active volcanoes of Tolbachik, Bezymianny, and Klyuchevskoy in Kamchatka

Author

Koulakov, Ivan, primary, Abkadyrov, Ilyas, additional, Al Arifi, Nassir, additional, Deev, Evgeny, additional, Droznina, Svetlana, additional, Gordeev, Evgeny I., additional, Jakovlev, Andrey, additional, El Khrepy, Sami, additional, Kulakov, Roman I., additional, Kugaenko, Yulia, additional, Novgorodova, Anzhelika, additional, Senyukov, Sergey, additional, Shapiro, Nikolay, additional, Stupina, Tatyana, additional, and West, Michael, additional

Published
2017
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