A 14C-Dating and Oxygen-Isotope Diagram of a Holocene Refofmed Ice  Wedge on the Chara River (Transbaical Region)

Авторы: Vasil'chuk Yu K., Zaitsev V.N., Vasil'chuk A.C.
Журнал: Transactions (Doklady) of the Russian Academy of Sciences. Earth Science Section
Том: 407
Номер: 2
Год издания: 2006
Первая страница: 265
Последняя страница: 270
DOI: 10.1134/S1028334X06020267
Аннотация: The purpose of our work is to refine the age of the Holocene polygonal ice wedge complex in first terrace of the Chara River, plot an isotope diagram, which allows one to reconstruct winter temperatures of the period of ice-wedge formation, and prove the possibility of active formation of ice wedges in the Holocene Optimum in even the southern regions of Siberia. Palynological data indicate only a short-term decrease in summer temperatures relative to current values (under conditions of a slightly more positive summer temperature relative to the current one) in the Chara Depression within the period of 10-7.5 ka BP, whereas the oxygen isotope data on the ice wedges suggest that winter temperatures were constantly lower than the present-day temperatures. The materials presented allowed us to prove the possibility of an intense growth of syngenetic ice wedges in the sandy-gravel sequence in the Holocene optimum in even the southern regions of the Siberian cryolithozone.
Добавил в систему: Васильчук Юрий Кириллович

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