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Isotope composition of pingo ice core in the Yevo-Yakha River valley, north-west Siberiaстатья
Дата последнего поиска статьи во внешних источниках: 19 сентября 2015 г.
- Авторы: Vasil’chuk Yu K., Budantseva N.A., Vasil’chuk A.C., Yoshikawa K., Podborny Ye Ye, Chizhova Ju N.
- Журнал: Earth's Cryosphere
- Том: 4
- Номер: 18
- Год издания: 2014
- Издательство: Izdatel'stvo Sibirskogo Otdeleniia RAN
- Местоположение издательства: Russian Federation
- Первая страница: 41
- Последняя страница: 51
- Аннотация: The paper is published in Marth 2015. The paper presents the study of Pestsovoye Pingo with ice core thickness greater than 15 m, developed in the Evo-Yakha River valley, north-west Siberia. The stable isotope analysis of pingo ice showed that δ18О values vary from –11.6 to –15.8 ‰, and δD from –93.2 to –123.0 ‰. The isotopic data distribution was compared to Weather Pingo ice core (Alaska) and revealed that δ18О values in Weather Pingo ice range from –15.5 to –22.0 ‰, and δD values change from –132 to –170 ‰. The vertical distribution diagram of the isotope data for Pestsovoye and Weather Pingos ice being arcuate-shaped, it can be inferred that isotope fractionation during the freezing of the sub-pingo waters was taking place in a closed system, which is evidenced by the isotopic variations in pingo ice: by 4–6 ‰ in δ18О and by 20–25 ‰ in δD values. Radiocarbon dating of the peat layer covering Pestsovoye Pingo is indicative of the frost heave occurring in two stages: the first stage (about 5 kyr BP) commenced in the distal part of the frost mound; in the second stage (about 2.5 kyr BP), the heaving rebounded actively in the middle part of pingo. Given the heaving rates were very high – more than 2–3 cm per year, the frost mound has grown up to be a 17 m high pingo.
- Добавил в систему: Васильчук Юрий Кириллович
Прикрепленные файлы
| № | Имя | Описание | Имя файла | Размер | Добавлен |
|---|---|---|---|---|---|
| 1. | Vasilchuk_2014_Pingo_Yevoyakha_engl.pdf | Vasilchuk_2014_Pingo_Yevoyakha_engl.pdf | 3,0 МБ | 6 июня 2016 [vasilchuk] |