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Formation and Evolution of the Russian Arctic Cryolithozone (on the shelf and the continent) in Pleistocene-Holoceneстатья
Статья опубликована в журнале из списка RSCI Web of Science
Статья опубликована в журнале из списка Web of Science и/или ScopusДата последнего поиска статьи во внешних источниках: 28 мая 2015 г.
- Автор: Shpolyanskaya N.A.
- Журнал: Geography, Environment, Sustainability
- Том: 7
- Номер: 03
- Год издания: 2014
- Издательство: Издательство Русского географического общества
- Местоположение издательства: Москва
- Первая страница: 22
- Последняя страница: 38
- Аннотация: The paper addresses age nonuniformity of the permafrost of the Russian Arctic shelf. It has been widely accepted that recent permafrost exists on the present-day shelf, which was formed under subaerial conditions during shelf draining in the Late Pleistocene, was flooded during the subsequent transgression, and now exists as a relic zone. However, there is also modern permafrost forming under submarine conditions. The paper considers the mechanism of its formation. The author suggests a mechanism that involves bottom soil freezing and ice formation due to constant natural transformations in seabed sediments. The proposed mechanism is supported by analyzes of certain sections of the bottom sediments of shelf and of the Pleistocene marine plains (ancient shelves) composed of dislocated sequences with massive ice beds. Analysis of the massive ground ice genesis identified different geological history as well as different transgressive and regressive regime of the Russian Arctic western and eastern sectors. The glacial cover has limited distribution in the Russian North and was absent on the Russian Arctic and Subarctic plains to the East of the Kanin Peninsula.
- Добавил в систему: Шполянская Нелла Александровна