High-Resolution Oxygen Isotope Diagram of Late Pleistocene Ice Wedges of Seyaha Yedoma, Eastern Yamal Peninsula

Vasil’chuk, Y.K.; Budantseva, N.A.; Vasil’chuk, A.C.

Авторы: Vasil’chuk Yu K., Budantseva N.A., Vasil’chuk A.C.
Журнал: Doklady Earth Sciences
Том: 487
Номер: 1
Год издания: 2019
Издательство: Maik Nauka/Interperiodica Publishing
Местоположение издательства: Russian Federation
Первая страница: 823
Последняя страница: 826
Оригинальные версии: Высокоразрешающая изотопно-кислородная диаграмма позднеплейстоценовых повторно-жильных льдов Сеяхинской едомы, Восточный Ямал
DOI: 10.1134/S1028334X19070195
Аннотация: The main aim of this work is to study the oxygen isotope composition of Late Pleistocene syngenetic repeated ice wedges and to obtain a high-resolution isotope diagram based on detailed sampling of the Seyakha yedoma section in the sequence of the Late Pleistocene third lagoonal-marine terrace near the mouth of the Seyakha (Zelenaya) River, on the shore of the Gulf of Ob. According to three new radiocarbon dates (25.2 to 23.3 ka BP) from absolute heights of +2 to +5 m and also dates obtained earlier (17.3 ka BP from +18.8 m; 11.6 ka BP from +21.2 m), the approximate age of this ice wedge ranges from 23 to 15–18 ka. The values of δ18О in the upper fragment of the ice vein vary from –25.75 to –23.15‰. The amplitude of horizontal variations in δ18О at +15.2 m height is 1.49‰ (–23.41 to –24.9‰). The lower fragment of the ice wedge at +6 m height is characterized by a broader variation range of δ18О compared to the upper one: δ18О varies in the horizontal direction from –23.41 to –26.63‰. The detalization step of the oxygen isotope diagram obtained is 80–100 years. The mean January temperatures in the period 23–15 (18) ka BP ranged from –35 to –39°C.
Добавил в систему: Васильчук Алла Константиновна

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High-Resolution Oxygen Isotope Diagram of Late Pleistocene Ice Wedges of Seyaha Yedoma, Eastern Yamal Peninsulaстатья Перевод

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