TY - JOUR

T1 - New Data on the Chronostratigraphy of the Upper Pleistocene Loess–Soil Series in Southwestern Siberia

AU - Zykina, V. S.

AU - Zykin, V. S.

AU - Volvakh, N. Ye

AU - Volvakh, A. O.

AU - Murray, A. S.

AU - Taratunina, N. A.

AU - Kurbanov, R. N.

N1 - Funding Information: This research was conducted within the framework of a State Assignment of the Institute of Geology and Mineralogy, Siberian Branch, Russian Academy of Sciences (project no. 0330-2019-0017) and of the Institute of Geography, Russian Academy of Sciences (project no. 0148-2019-0005), and was supported by the Russian Foundation for Basic Research (project nos. 19-05-00513, 20-05-00801, and 19-35-90040 Graduate Students). Publisher Copyright: © 2021, Pleiades Publishing, Ltd.

PY - 2021/10

Y1 - 2021/10

N2 - We have analyzed the modern status of the chronostratigraphic differentiation of the loess–paleosoil series in southwestern Siberia and the results of luminescence dating of the reference section of the Altai low mountains near the settlement of Krasnogorskoe. A complete series of the Middle and the Late Pleistocene levels of paleosoil formation is distinguished. Six new dates were obtained for the section by optically stimulated luminescence (OSL) and infrared stimulated luminescence (IRSL), and two samples were measured simultaneously, using quartz and feldspar, to control the light exposure and the reliability of the absolute age determined. The results obtained indicate the formation of the lower Berdsk paleosoil during the last interglacial period, which corresponds to Marine isotopic stage (MIS) 5e, and two dates of the underlying loess (127 and 149 ka BP) confirm that the age of this strata correlates with MIS 6. The age of the overlying Iskitimsk pedocomplex and of the horizon of Yeltsovsk loess is also substantiated by four OSL dates (48–39 and 39–25 ka BP). The final chronology confirms the previously elaborated chronostratigraphic scheme of the loess–paleosoil series in southwestern Siberia, which is based on a detailed morphological characteristic of paleosoils.

AB - We have analyzed the modern status of the chronostratigraphic differentiation of the loess–paleosoil series in southwestern Siberia and the results of luminescence dating of the reference section of the Altai low mountains near the settlement of Krasnogorskoe. A complete series of the Middle and the Late Pleistocene levels of paleosoil formation is distinguished. Six new dates were obtained for the section by optically stimulated luminescence (OSL) and infrared stimulated luminescence (IRSL), and two samples were measured simultaneously, using quartz and feldspar, to control the light exposure and the reliability of the absolute age determined. The results obtained indicate the formation of the lower Berdsk paleosoil during the last interglacial period, which corresponds to Marine isotopic stage (MIS) 5e, and two dates of the underlying loess (127 and 149 ka BP) confirm that the age of this strata correlates with MIS 6. The age of the overlying Iskitimsk pedocomplex and of the horizon of Yeltsovsk loess is also substantiated by four OSL dates (48–39 and 39–25 ka BP). The final chronology confirms the previously elaborated chronostratigraphic scheme of the loess–paleosoil series in southwestern Siberia, which is based on a detailed morphological characteristic of paleosoils.

KW - geochronology

KW - loess

KW - OSL dating

KW - paleopedology

KW - paleosoils

KW - Quaternary period

UR - http://www.scopus.com/inward/record.url?scp=85118718983&partnerID=8YFLogxK

U2 - 10.1134/S1028334X21100202

DO - 10.1134/S1028334X21100202

M3 - Article

AN - SCOPUS:85118718983

VL - 500

SP - 870

EP - 874

JO - Doklady Earth Sciences

JF - Doklady Earth Sciences

SN - 1028-334X

IS - 2

M1 - 14

ER -