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Chemical composition of Holocene ice wedges in the northeast of Chukotka
Budantseva Nadine Arkad'evna

PhD in Geography

Senior Scientific Associate, the department of Geography, M. V. Lomonosov Moscow State University 

119992, Russia, g. Moscow, ul. Leninskie Gory, 1, stroenie 19

nadin.budanceva@mail.ru

 

 
Vasil'chuk Jessica Yur'evna

Master at Moscow State University 

119991, Russia, Moscow, ul. Leninskie Gory, 1, of. 2012

young-krishna@yandex.ru
Maslakov Aleksei Alekseevich

Postgraduate at Lomonosov Moscow State University 

119991, Russia, Moscow, ul. Leninskie Gory, 1, of. 1920

alekseymaslakov@yandex.ru
Vasil'chuk Alla Constantinovna

Doctor of Geography

Leading Research Fellow at the Laboratory of Geoecology of the Northern Territories of Lomonosov Moscow State University 

119991, Russia, Moscow, ul. Leninskie Gory, 1

alla-vasilch@yandex.ru
Vasil'chuk Yurii Kirillovich

Doctor of Geology and Mineralogy

Professor at the Department of Landscape Geochemistry and Soil Geography of Lomonosov Moscow State University 

119991, Russia, Moscow, ul. Leninskie Gory, 1, of. 2012

vasilch_geo@mail.ru

Abstract.

The Chukchi Peninsula or Chukotka Peninsula at about 66° N 172° W, is the eastmost peninsula of Asia. Its eastern end is at Cape Dezhnev near the village of Uelen. It is bordered by the Chukchi Sea to the north, the Bering Sea to the south, and the Bering Strait to the east. Most of the Chukchi Peninsula is occupied by highlands up to 1000 m a.s.l height. Lowlands are found, as a rule, near large lagoons. The main features of the area (from Anadyr' town to Lavrentiya) are represented by a slightly hilly relief formed by fluvial erosion and marine abrasion of the Mesozoic blocks. For the determination of the ion composition of ice wedges, ice samples were taken both horizontally with an interval of 10-12 cm and vertically with an interval of 10-15 cm. The ion composition of the ice was analyzed by ion chromatography method in the geochemistry laboratory of the Department of Landscape Geochemistry and Soil Geography of the Faculty of Geography of Lomonosov Moscow State University on the ion chromatograph "Stayer". The detection limit for chloride ion was 0.02 mg / l. The hydrochemical composition of snow, rivers and lakes water, segregated ice and partly of ice wedges was carried out in the hydrochemical laboratory of PNIIIS by acid-base titration. Continuous permafrost occurs everywhere beneath the ground surface. Taliks (up to 30-40 m thick) often occur underneath the largest thermokarst lakes and in the and under the lower reaches of large rivers. The temperature of the permafrost averages -10 ° C in the axial parts of the mountain ridges and -4 ... -6 ° C in river valleys and on the coasts. The thickness of the permafrost varies from 500-700 m in the highest parts of the ridges to 200-300 m in the interior valleys.

Keywords: peatbogs, segregated ice, salinity, marine coast, lake floodplaine, ions, mineralization, the Holocene, ice wedge, radiocarbon age

DOI:

10.7256/2453-8922.2017.2.22980

Article was received:

04-06-2017


Review date:

04-06-2017


Publish date:

24-06-2017


This article written in Russian. You can find full text of article in Russian here .

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