Vol15 No.3: 504-518
【Title】Luminescence chronology and age model application for the upper part of the Chumbur-Kosa loess sequence in the Sea of Azov, Russia
【Author】CHEN Jie; YANG Tai-bao; G.G. MATISHOV; A.A. VELICHKO; ZENG Biao; HE Yi; SHI Pei-hong
【Addresses】1 Institute of Glaciology and Ecogeography, College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, China; 2 Southern Scientific Center, Russian Academy of Sciences, Chekhov Av. 41, 344006 Rostov-on-Don, Russia; 3 Institute of Geography, Russian Academy of Sciences, Staromonetny, 29, Moscow 109027, Russia; 4 Faculty of Geomatics, Lanzhou Jiaotong University, Lanzhou 730000, China; 5 College of Tourism and Environment, Shananxi Normal University, Xi'an 710119, China
【Citation】Chen J, Yang TB, Matishov GG, et al. (2018) Luminescence chronology and age model application for the upper part of the Chumbur-Kosa loess sequence in the Sea of Azov, Russia. Journal of Mountain Science 15(3). https://doi.org/10.1007/s11629-017-4689-0
【Abstract】A reliable chronology is essentially critical for correlating loess records with other paleoenvironmental time series, as well as for continuing improvements in the reconstruction of paleoenvironment and paleoclimate changes. It is exactly that the scarcity of chronologies across the Sea of Azov has limited the interpretation of climatic and environmental information in the East European Plain. In view of this, this paper conducted an exploratory study to investigate whether the optically stimulated luminescence (OSL) dating of medium- grained quartz could be used to obtain a set of chronologies and the age models could be used to establish an independent time scale since the Late Pleistocene for the Sea of Azov loess. The results showed that an internally consistent set of optical ages for the Azov loess deposited up to ～76 ka. In addition, the ages developed based on magnetic susceptibility and grain size ages models showed good comparability with independent OSL ages at an acceptable range, suggesting that it might be practicable to establish an independent time scale using age models at the Sea of Azov loess, at least for the uppermost part of the Chumbur-Kosa section. Comparison with the ages based on two age models, the grain size ages using fine-grain fractions may provide a more reliable chronological sequence at the Azov loess since the Late Pleistocene. With the help of absolute ages and climate proxies (magnetic susceptibility and grain size), paleoclimatic change in the Sea of Azov have been traced for the Late Pleistocene.
【Keywords】Optical dating; Age models; Loess; Late Pleistocene; Sea of Azov