<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml"><p>A 14C date older than 53900 yrs BP was obtained for the uppermost part of the buried peat bog in Krivosheino section (Middle Pleistocene of Western Siberia). These sediments also yielded 230Th/U dates of 195−9.1+10.8 ka using the leachate alone (L/L) and 204−13+17 ka using total sample dissolution (TSD) models. Peculiarities of 230Th/U dating are discussed. Palynological investigation of the buried peat bog together with underlying and overlaying sediments, and comparison with palynological data from Baikal and Elgygytgyn lakes revealed that the peat layer in Krivosheino section was formed at the end of Shirta Interglacial (Marine Isotopic-Oxygenous stages MIS-7), when climate conditions at all studied sites were more severe compared to the modern ones.</p></abstract>

A 14C date older than 53900 yrs BP was obtained for the uppermost part of the buried peat bog in Krivosheino section (Middle Pleistocene of Western Siberia). These sediments also yielded 230Th/U dates of 195−9.1+10.8 ka using the leachate alone (L/L) and 204−13+17 ka using total sample dissolution (TSD) models. Peculiarities of 230Th/U dating are discussed. Palynological investigation of the buried peat bog together with underlying and overlaying sediments, and comparison with palynological data from Baikal and Elgygytgyn lakes revealed that the peat layer in Krivosheino section was formed at the end of Shirta Interglacial (Marine Isotopic-Oxygenous stages MIS-7), when climate conditions at all studied sites were more severe compared to the modern ones.

First 230Th/U date of Middle Pleistocene peat bog in Siberia (key section Krivosheino, Western Siberia)

S.-Petersburg State University, 10 Line V.O., S-Petersburg State University, 199178, S.-Petersburg, Russia

Earth Cryosphere Institute SB RAS & Moscow State Academy of Municipal Economy and Building, 86 Malygin str., 625026, Tyumen, Russia

Geographical Faculty of Moscow State University, Leninskye Gory, Moscow State University, 119991, Moscow, Russia

Geochronometria

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

A 14C date older than 53900 yrs BP was obtained for the uppermost part of the buried peat bog in Krivosheino section (Middle Pleistocene of Western Siberia)....

First 230Th/U date of Middle Pleistocene peat bog in Siberia (key section Krivosheino, Western Siberia)

Publié en ligne: 22 sept. 2012

Pages: 241 - 251

DOI: https://doi.org/10.2478/s13386-012-0014-4

Mots clés
230Th/U dating, palynological data, palaeoclimates, Middle Pleistocene, Western Siberia

© 2012 Silesian University of Technology, Gliwice, Poland

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

First 230Th/U date of Middle Pleistocene peat bog in Siberia (key section Krivosheino, Western Siberia)

Publié en ligne: 22 sept. 2012

Pages: 241 - 251

DOI: https://doi.org/10.2478/s13386-012-0014-4

Mots clés230Th/U dating, palynological data, palaeoclimates, Middle Pleistocene, Western Siberia

© 2012 Silesian University of Technology, Gliwice, Poland

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Mots clés
230Th/U dating, palynological data, palaeoclimates, Middle Pleistocene, Western Siberia