The First AMS Dating of Organic Microinclusions in an Ice Wedge of the Upper Part of the Batagay Yedoma Megaslump (Yakutia)

Microinclusions of organic matter were dated using acceleration mass spectrometry in seven samples from the upper part of the thick Pleistocene syngenetic ice wedge exposed in the outcrop of the Batagay yedoma located in northern Yakutia along the upper Yana River (67.58° N, 134.77° E). The dated fr...

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Bibliographic Details
Main Authors: Vasil'chuk, Yurij K, Vasil'chuk, Jessica Yurevna
Format: Dataset
Language:English
Published: PANGAEA 2020
Subjects:
air temperature
Batagay
ice‐wedge
Pleistocene
radiocarbon age
stable water isotopes
yedoma megaslump
Batagaika crater
Yana River
Arctic
Polar Geography
Polar Research
Polarforschung
Yakutia
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.918550
https://doi.org/10.1594/PANGAEA.918550
Description
Summary:Microinclusions of organic matter were dated using acceleration mass spectrometry in seven samples from the upper part of the thick Pleistocene syngenetic ice wedge exposed in the outcrop of the Batagay yedoma located in northern Yakutia along the upper Yana River (67.58° N, 134.77° E). The dated fragment veins were formed within 22760-29910 radiocarbon years BP (or 27.1-33.8 cal BP) ago. Using detailed isotope data, the January average air temperature in the Late Pleistocene (25-30 cal BP) was calculated for the Batagay section along with a series of reference sections in northwestern Yakutia. It was shown that the minimum January average air temperature (-51°C) was characteristic at that time for the area of the Batagaika crater, with values 4-5°C higher in areas 500-600 km further north. This effect was caused by the occurrence of the Yakutia anticyclone in winter during the Late Pleistocene, which was just as pronounced as that at the present time.

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