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...
Main Authors: | , , , , , , , , , |
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Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2024
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Subjects: | |
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 |
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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