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


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Resumo

For the first time, the organic sediments of the Kazantsevo Horizon (Baikal Region) were characterized geochronometrically. The 230Th/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 230Th/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 5d). 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.

Sobre autores

A. Kazanskii

Faculty of Geology

Email: shchet@crust.irk.ru
Rússia, Moscow, 119991

G. Matasova

Trofimuk Institute of Petroleum Geology and Geophysics, Siberian Branch

Email: shchet@crust.irk.ru
Rússia, prosp. Akad. Koptyuga 3, Novosibirsk, 630090

A. Starikova

St. Petersburg State University

Email: shchet@crust.irk.ru
Rússia, Universitetskaya nab. 7/9, St. Petersburg, 199034

F. Maksimov

St. Petersburg State University

Email: shchet@crust.irk.ru
Rússia, Universitetskaya nab. 7/9, St. Petersburg, 199034

A. Schetnikov

Institute of the Earth’s Crust, Siberian Branch; Institute of Geochemistry, Siberian Branch

Autor responsável pela correspondência
Email: shchet@crust.irk.ru
Rússia, ul. Lermontova 128, Irkutsk, 664033; ul. Favorskogo 1a, Irkutsk, 664033

V. Kuznetsov

St. Petersburg State University

Email: shchet@crust.irk.ru
Rússia, Universitetskaya nab. 7/9, St. Petersburg, 199034

I. Filinov

Institute of the Earth’s Crust, Siberian Branch; Institute of Geochemistry, Siberian Branch

Email: shchet@crust.irk.ru
Rússia, ul. Lermontova 128, Irkutsk, 664033; ul. Favorskogo 1a, Irkutsk, 664033

V. Grigoriev

St. Petersburg State University

Email: shchet@crust.irk.ru
Rússia, Universitetskaya nab. 7/9, St. Petersburg, 199034

V. Savenko

St. Petersburg State University

Email: shchet@crust.irk.ru
Rússia, Universitetskaya nab. 7/9, St. Petersburg, 199034

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