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Radiocarbon Dating of δ18O-δD Plots in Late Pleistocene Ice-Wedges of the Duvanny Yar (Lower Kolyma River, Northern Yakutia)

Published online by Cambridge University Press:  18 July 2016

Yurij K Vasil'chuk ,
Alla C Vasil'chuk ,
Dieter Rank ,
Walter Kutschera  and
Jong-Chan Kim
Yurij K Vasil'chuk*
Affiliation:
Faculties of Geology and Geography, Lomonosov's Moscow State University, 119899, Vorob'yovy Gory, Moscow, Russia
Dieter Rank
Affiliation:
Österreichisches Forschungs-und Prüfzentrum Arsenal, Faradaygasse 3, A-1030, Vienna, Austria
Walter Kutschera
Affiliation:
Institut für Radiumforschung und Kernphysik, Waehringer Strasse 17, A-1090, Vienna, Austria
Jong-Chan Kim
Affiliation:
School of Physics, Seoul National University, San 56-1, Sillim-Dong, Seoul, 151, Korea
*
Corresponding author. Email: vasilch@orc.ru.
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Abstract

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The Duvanny Yar cross-section located in the Lower Kolyma River valley of Northern Yakutia (69°N, 158°E, height above the Kolyma River level 55 m), has been studied and dated in detail by radiocarbon. The sequence mainly consists of sandy loam sediments with large syngenetic ice wedges. Their width at the top is 1–3.5 m. Allochthonous organic material occurs in high content, concentrating as 0.5–0.7 m lenses. Shrub fragments, twigs, and mammoth bones are accumulated in peaty layers. Through interpolation based on a series of 14C dates, dating of the host sediments provides an approximate age for the ice wedges. The 14C dates of various types of organic material are sometimes very close, but not all in agreement. Therefore, the dates do not accurately show the age of the δ18O and δD plots. A new approach is developed to a 14C dating strategy of syncryogenic sediments with high admixture of allochthonous organic material. The main purpose of this study is to consider detection of inversions or disturbances in the syngenetic permafrost sediment at the Duvanny Yar cross-section by 14C date series. Direct accelerator mass spectrometry (AMS) dating of the ice confirmed the relatively young age of ice wedges.

Type
I. Our ‘Dry’ Environment: Above Sea Level
Information
Radiocarbon , Volume 43 , Issue 2B: Proceedings of the 17th International Radiocarbon Conference (Part 2 of 3), Conference Editors: Israel Carmi, Elisabetta Boaretto , 2001 , pp. 541 - 553
Copyright
Copyright © 2001 by the Arizona Board of Regents on behalf of the University of Arizona 

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