Preprints
https://doi.org/10.5194/egusphere-2023-2754
https://doi.org/10.5194/egusphere-2023-2754
03 Jan 2024
 | 03 Jan 2024

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

Zhengyi Hu, Wei Jiang, Yuzhen Yan, Yan Huang, Xueyuan Tang, Lin Li, Florian Ritterbusch, Guo-Min Yang, Zheng-Tian Lu, and Guitao Shi

Abstract. 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.

Zhengyi Hu, Wei Jiang, Yuzhen Yan, Yan Huang, Xueyuan Tang, Lin Li, Florian Ritterbusch, Guo-Min Yang, Zheng-Tian Lu, and Guitao Shi

Status: final response (author comments only)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on egusphere-2023-2754', Anonymous Referee #1, 19 Jan 2024
  • RC2: 'Comment on egusphere-2023-2754', Anonymous Referee #2, 22 Jan 2024
Zhengyi Hu, Wei Jiang, Yuzhen Yan, Yan Huang, Xueyuan Tang, Lin Li, Florian Ritterbusch, Guo-Min Yang, Zheng-Tian Lu, and Guitao Shi
Zhengyi Hu, Wei Jiang, Yuzhen Yan, Yan Huang, Xueyuan Tang, Lin Li, Florian Ritterbusch, Guo-Min Yang, Zheng-Tian Lu, and Guitao Shi

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Short summary
The age of the surface blue ice in the Grove Mountain area is date to be about 140,000 years, and one meteorite found here is 260,000 years old. It is inferred that Grove Mountains blue ice area holds considerable potential for paleoclimate studies.