Open AccessOxygen isotope composition of the ice wedges of Ayon Island and Late Pleistocene and Holocene palaeotemperature reconstruction of the Northern Chukotka
Author(s) -
Yurij K Vasil’chuk,
Alla Constantinovna Vasil'chuk
Publication year - 2017
Publication title -
vestnik moskovskogo universiteta. seriâ 4, geologiâ
Language(s) - English
Resource type - Journals
ISSN - 0579-9406
DOI - 10.33623/0579-9406-2017-6-92-104
Subject(s) - geology , holocene , pleistocene , ice wedge , isotopes of oxygen , wedge (geometry) , geomorphology , sediment , paleontology , oceanography , geochemistry , permafrost , geometry , mathematics
Syngenetic ice wedges have been investigated in the Ayon Island. Their isotopic composition, geochemical characteristics of both ice wedges and enclosing sediment have been obtained; four ice-wedges stages have been distinguished. Paleo temperature reconstructions for Ayon Island and adjacent territories of northern Chukotka have been yielded at the basis of these results. It is observed almost identical trends in the distribution of ice-wedge isotopic characteristics in the island and in the lower reaches of the Kolyma River, as well as differences in the magnitude of isotopic oscillations during the transition from Late Pleistocene to the Holocene as compared to ice-wedges of the Lower Kolyma region.