Brief communication: Identification of 140,000-year-old blue ice in Grove Mountains, East Antarctica, by krypton-81 dating

The presence of exceptionally old ice and the relative ease of access make Antarctic blue ice areas (BIAs) attractive paleoclimate archives. However, only a handful of BIAs, mostly situated in West Antarctica and along the Trans-Antarctic Mountains, have been investigated for this purpose. Here, we...

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Bibliographic Details
Main Authors: Hu, Zhengyi, Jiang, Wei, Yan, Yuzhen, Huang, Yan, Tang, Xueyuan, Li, Lin, Ritterbusch, Florian, Yang, Guo-Min, Lu, Zheng-Tian, Shi, Guitao
Format: Article in Journal/Newspaper
Language:English
Published: Copernicus Publications 2024
Subjects:
article
Verlagsveröffentlichung
Antarctic
Bia
East Antarctica
Grove Mountains
West Antarctica
Antarc*
Antarctica
Online Access:https://doi.org/10.5194/egusphere-2023-2754
https://noa.gwlb.de/receive/cop_mods_00070813
https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00069143/egusphere-2023-2754.pdf
https://egusphere.copernicus.org/preprints/2024/egusphere-2023-2754/egusphere-2023-2754.pdf
Description
Summary:The presence of exceptionally old ice and the relative ease of access make Antarctic blue ice areas (BIAs) attractive paleoclimate archives. However, only a handful of BIAs, mostly situated in West Antarctica and along the Trans-Antarctic Mountains, have been investigated for this purpose. Here, we present the age of surface ice from the Grove Mountains BIA in Elizabeth Princess Land, East Antarctica, determined by measuring 81Kr in the trapped air. Two samples yield an average age of 143+33-29 kyr. Together with the reported terrestrial age of a chondrite, we conclude that Grove Mountains BIA holds considerable potentials for paleoclimate studies.

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