U–Th age of the Kazantsevo (MIS 5) Horizon of the Upper Neopleistocene Ust Oda reference section, Baikal Region

• Published in: Doklady earth sciences Vol. 473; no. 1; pp. 266 - 270
• Main Authors: Maksimov, F. E., Schetnikov, A. A., Kuznetsov, V. Yu, Filinov, I. A., Grigoriev, V. A., Savenko, V. B., Kazanskii, A. Yu, Matasova, G. G., Starikova, A. A.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01-03-2017; Springer; Springer Nature B.V
• Subjects: Earth and Environmental Science; Earth Sciences; Freshwater; Geology; Organic sediments; Sedimentary rocks; Sediments (Geology)
• ISSN: 1028-334X; 1531-8354
• DOI: 10.1134/S1028334X17030151

For the first time, the organic sediments of the Kazantsevo Horizon (Baikal Region) were characterized geochronometrically. The
230
Th/U age of the buried gyttias from the Upper Neopleistocene Ust Oda stratotypical section on the Kitoi River was determined using a new version of isochronous approximation. The assemblage of all the
230
Th/U age data, which were obtained taking into account the errors in the entire range from 136 to 86 kyr, indicates that most likely gyttia age is 115–104 kyr (MIS 5
d
). Thus, the paleontological conclusions on the Kazantsevo age of the Ust Oda Formation with buried gyttias are confirmed. Our geochronometric data supplement and make more reliable the age model of the formation of sedimentary rocks of the Ust Oda section.