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Isotope Signature Of The Massive Ice Bodies On The Northeast Coast Of Chukotka Peninsula

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The massive ice (MI) bodies are widespread phenomena on Chukotka coastal plains. Although they have been studying since 1930s, stable isotope method was applied for the ice beds quite recently. In this study cryostratigraphy and stable oxygen and hydrogen isotope composition of MI bodies on the extreme North-Eastern Chukotka (near Lavrentiya settlement and Koolen’ lake) have been studied in detail. It was concluded that studied MI bodies have intrasedimental origin and most likely are dated back to the Late Pleistocene age. Mean δ18O values range from –18.5 ‰ to –15 ‰ whereas mean δ2 H values range from –146‰ to –128 ‰ that is higher than expected for the Late Pleistocene ice bodies in this region, which most likely resulted from isotopic fractionation during freezing of water-saturated sediments in a closed system when forming ice became isotopically enriched compared with initial water. The analysis of co-isotope ratios for MI shows that initial water is mainly of meteoric origin (precipitation, water of lakes and taliks).

About the Authors

Yurij K. Vasil’chuk
Lomonosov Moscow State University
Russian Federation

Faculty of Geography 

Leninskie Gory, 119991 Moscow

Alexey A. Maslakov
Lomonosov Moscow State University
Russian Federation

Faculty of Geography 

Leninskie Gory, 119991 Moscow

Nadine A. Budantseva
Lomonosov Moscow State University
Russian Federation

Faculty of Geography 

Leninskie Gory, 119991 Moscow

Alla С. Vasil’chuk
Lomonosov Moscow State University
Russian Federation

Faculty of Geography 

Leninskie Gory, 119991 Moscow

Nina N. Komova
Lomonosov Moscow State University
Russian Federation

Faculty of Geography 

Leninskie Gory, 119991 Moscow


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For citations:

Vasil’chuk Yu.K., Maslakov A.A., Budantseva N.A., Vasil’chuk A.С., Komova N.N. Isotope Signature Of The Massive Ice Bodies On The Northeast Coast Of Chukotka Peninsula. GEOGRAPHY, ENVIRONMENT, SUSTAINABILITY. 2021;14(4):9-19.

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