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Формирование сингенетических повторно-жильных льдов во время голоценового оптимума в условиях быстрого накопления торфа на Центральном Ямалестатья
Статья опубликована в журнале из списка RSCI Web of Science
Статья опубликована в журнале из перечня ВАКСтатья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 11 апреля 2017 г.
- Авторы: Васильчук Ю.К., Васильчук А.К., Юнгнер Х., ван дер Плихт Й.
- Журнал: Криосфера Земли
- Том: 3
- Номер: 1
- Год издания: 1999
- Первая страница: 1
- Последняя страница: 12
- Аннотация: Syngenetic ice-wedges have been found in the Seyaha (Zelyonaya) River mouth in Ob Bay, eastern coast of central part of Yamal Peninsula. They formed intensively during optimum of Holocene. Thick peat (4.5-5 m), accumulated very fast during 700-800 years. There are several layers with abundance of tree remains such as trunks with crust, brunches and stumps with roots. Some trunks occur at living position sub-vertically. 60 radiocarbon determinations have been made. The oldest dates of the wood and host peat are 8700-8800 years BP. The completion of the peat accumulation is dated about 7800 years BP. It follows from these results that more than 4.5 m of the peat accumulated during 700-800 years. This is extreme rapid rate of peat accumulation, however it should be noted that the peat is saturated by ice, ice content is more than 40%. It may be concluded that 2.5 m of the pure peat accumulated only. This accumulation rate is also very fast especially if it is considered that the process of peat accumulation was mainly autochthonous. In the segregated ice delta18О values ranges -14.6 to -12.5‰, these values are isotopically heavier than that in Holocene ice wedges - -20.3 to -19.1‰, deltaD values - from -143.4 to -137.6‰. Analysis of delta13C has been provided to the all samples dated by radiocarbon. Analyses of chemical composition and enzymatic activity in ice-wedge and segregated ice have been made. Global and local features of tree vegetation development, and formation of peatbogs and ice-wedge are established.
- Добавил в систему: Васильчук Юрий Кириллович
Прикрепленные файлы
| № | Имя | Описание | Имя файла | Размер | Добавлен |
|---|---|---|---|---|---|
| 1. | Vasilchuk_1999_Golotsen_Seyaha_Kriosfera_Zemli_1999_1.pdf | Vasilchuk_1999_Golotsen_Seyaha_Kriosfera_Zemli_1999_1.pdf | 2,1 МБ | 2 июля 2020 [vasilchuk] | |
| 2. | Vasilchuk_Vasilchuk_et_al._1999_IW_Seyaha_Hol_Cry_Zem.pdf | Vasilchuk_Vasilchuk_et_al._1999_IW_Seyaha_Hol_Cry_Zem.pdf | 1,1 МБ | 16 февраля 2015 [vasilchuk] |