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Doklady Earth Sciences

, Volume 433, Issue 1, pp 915–919 | Cite as

The first uranium-thorium dating of the Middle Neopleistocene peat in West Siberia

  • F. E. MaksimovEmail author
  • S. A. Laukhin
  • Kh. A. Arslanov
  • V. Yu. Kuznetsov
  • G. N. Shilova
  • S. B. Chernov
  • I. E. Zherebtsov
  • S. B. Levchenko
Geography

Abstract

For a sample from the roof of peat (0–2 cm) located in a reference section for the Middle Neopleistocene in West Siberia near the village of Krivosheino, we obtained an exorbitant value of 14C date ≥53.9 ka B.P. (LU-6024). In the peat proper, the 230Th/U dates obtained by the isochronous method are 195.2 ± 10.8/9.1 ka B.P. for the L/L model and 204.1 ± 17/13 ka B.P. for the TSD model. The palynospectra of the peat characterize, from the bottom up, birch forests with fir and spruce participation; then spruce forests with fir; next spruce-cedar forests, similar to the middle taiga subzone. In the clay, the following palynospectra have been examined: forb-gramineous grasslands and light forests with spruce and Betula fruticosa. In the upper part of clays, the palynospectra reflect the evolution of swampy, birch, light forests with spruce participation. The conclusion is made that the studied part of the section formed at the end of the Samarovo Ice Age and in the last third of the Taz Ice Age. The break in sedimentation related to the erosion contact covers a part of the Samarovo Ice Age and the first two-thirds of the Taz Ice Age.

Keywords

Pleistocene DOKLADY Earth Science Birch Forest Isochronous Method Light Forest 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Pleiades Publishing, Ltd. 2010

Authors and Affiliations

  • F. E. Maksimov
    • 1
    Email author
  • S. A. Laukhin
    • 2
  • Kh. A. Arslanov
    • 1
  • V. Yu. Kuznetsov
    • 1
  • G. N. Shilova
    • 3
  • S. B. Chernov
    • 1
  • I. E. Zherebtsov
    • 1
  • S. B. Levchenko
    • 1
  1. 1.St. Petersburg State UniversitySt. PetersburgRussia
  2. 2.Institute of Problems of Development of the Russian North, Siberian BranchRussian Academy of SciencesTyumenRussia
  3. 3.PGO AerogeologiyaMoscowRussia

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