Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Determining the age of the megaflood event in the Biya River valley (Altai) through the study of high terrace deposits near Karabinka village. / Rusanov, G. G.; Deev, E. V.; Shpansky, A. V.
в: Geomorfologiya i Paleogeografiya, Том 55, № 4, 4, 2024, стр. 42-57.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Determining the age of the megaflood event in the Biya River valley (Altai) through the study of high terrace deposits near Karabinka village
AU - Rusanov, G. G.
AU - Deev, E. V.
AU - Shpansky, A. V.
N1 - Studies of travertines and radiocarbon dating were carried out within the framework of the state assignment of the IPGG SB RAS (project FWZZ2022-0001).
PY - 2024
Y1 - 2024
N2 - We studied a new section of the high (Biya) terrace on the Biya River near Karabinka village. The two identified sedimentary units – fluvial (lower) and subaerial (upper) – correlate well with known sections of the Biya terrace in the vicinities of Biysk city and Staraya Azhinka village. Results of deposits correlation, radiocarbon and optically simulated luminescence (OSL) dating reveal that the fluvial unit of the Biya terrace was accumulated by an enormous glacier-dammed lake outburst megaflood that traveled along the Biya River valley ca. 50–45 ka, during the first half of the interglacial MIS 3 stage. This was followed by the formation of the subaerial cover of the upper part of the terrace. For a long time up to 14.5 ka, dammed lakes existed in the tributaries of the Biya River that were blocked by giant bars. The good convergence of results of radiocarbon and OSL dating indicates that under proper control of the bleaching degree of quartz grains megaflood sands are usable for determination of the ages of large hydrological events. Dating the fluvial unit of the Biya terrace is important since it represents a regional stratigraphic marker that enables the correlation of Upper Pleistocene deposits of the Gorny Altai and the Fore-Altai Plain.
AB - We studied a new section of the high (Biya) terrace on the Biya River near Karabinka village. The two identified sedimentary units – fluvial (lower) and subaerial (upper) – correlate well with known sections of the Biya terrace in the vicinities of Biysk city and Staraya Azhinka village. Results of deposits correlation, radiocarbon and optically simulated luminescence (OSL) dating reveal that the fluvial unit of the Biya terrace was accumulated by an enormous glacier-dammed lake outburst megaflood that traveled along the Biya River valley ca. 50–45 ka, during the first half of the interglacial MIS 3 stage. This was followed by the formation of the subaerial cover of the upper part of the terrace. For a long time up to 14.5 ka, dammed lakes existed in the tributaries of the Biya River that were blocked by giant bars. The good convergence of results of radiocarbon and OSL dating indicates that under proper control of the bleaching degree of quartz grains megaflood sands are usable for determination of the ages of large hydrological events. Dating the fluvial unit of the Biya terrace is important since it represents a regional stratigraphic marker that enables the correlation of Upper Pleistocene deposits of the Gorny Altai and the Fore-Altai Plain.
KW - 14C dating
KW - Biya River
KW - ForeAltai Plain
KW - Gorny Altai
KW - OSL dating
KW - Upper Pleistocene
KW - megaflood
KW - terrace
UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-86000525176&origin=inward&txGid=24d9ca84849e8d080036f2f6ce51a36d
UR - https://elibrary.ru/item.asp?id=80387963
UR - https://www.mendeley.com/catalogue/abb38b2a-27c2-3404-8cf0-dafa2a98ef94/
U2 - 10.31857/S2949178924040044
DO - 10.31857/S2949178924040044
M3 - Article
VL - 55
SP - 42
EP - 57
JO - Геоморфология и палеогеография
JF - Геоморфология и палеогеография
SN - 2949-1789
IS - 4
M1 - 4
ER -
ID: 65071249