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Oxygen‐isotope and C14 data associated with Late Pleistocene syngenetic ice‐wedges in mountains of Magadan region, Siberia

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  • Yurij K. Vasil'chuk
  • Alla C. Vasil'chuk

Abstract

Two exposures of unusual ice‐wedge sediment complexes are described from the Upper Kolyma region. The sediment is peaty loam with a rock debris content of more than 30%. The oxygen isotope composition of the ice‐wedges and radiocarbon age of the enclosing sediments allow one to reconstruct palaeo‐facial and palaeo‐climatic information. The oxygen isotope data are interpreted in terms of mean winter temperatures. The mean winter temperatures for most of the ice‐wedge forming period were lower than modern ones by 5–6 °C; and mean January temperatures were lower by 7–9 °C. © 1998 John Wiley & Sons, Ltd. Deux coupes montrant des complexes inhabituels de coins de glace sont décrites dans la région de la Kolyma supérieure. Le sédiment est un limon tourbeux avec un contenu en débris rocheux de plus de 30%. La composition isotopique des coins de glace et l'âge des sédiments, permettent de fournir des informations concernant les paléofaciès et le paléoclimat. Les données isotopiques sont interprétées en terme de températures moyennes annuelles d'hiver. Les températures moyennes d'hiver pour la plus grande partie de la période de formation des coins de glace, auraient été inférieures de 5 à 6 °C aux températures actuelles tandis que les températures moyennes de janvier auraient été inférieures de 7 à 9 °C. © 1998 John Wiley & Sons, Ltd.

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  • Yurij K. Vasil'chuk & Alla C. Vasil'chuk, 1998. "Oxygen‐isotope and C14 data associated with Late Pleistocene syngenetic ice‐wedges in mountains of Magadan region, Siberia," Permafrost and Periglacial Processes, John Wiley & Sons, vol. 9(2), pages 177-183, April.
    • Handle: RePEc:wly:perpro:v:9:y:1998:i:2:p:177-183
    DOI: 10.1002/(SICI)1099-1530(199804/06)9:23.0.CO;2-T
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