Radiometric 81Kr dating identifies 120,000-year-old ice at Taylor Glacier, Antarctica

• Published in: Proceedings of the National Academy of Sciences
• Main Authors: Buizert, C., Baggenstos, D., Jiang, W., Purtschert, R., Petrenko, V. V., Lu, Z.-T., Muller, P., Kuhl, T., Lee, J., Severinghaus, J. P., Brook, E. J.
• Format: Article in Journal/Newspaper
• Language: English
• Published: National Academy of Sciences NAS 2014
• Subjects: 530 Physics; Atta; McMurdo Dry Valleys; Taylor Glacier; Antarc*; Antarctica
• Online Access: https://boris.unibe.ch/74092/1/buizert14pnas.pdf; https://boris.unibe.ch/74092/

We present successful 81 Kr-Kr radiometric dating of ancient polarice. Krypton was extracted from the air bubbles in four∼350-kg polar ice samples from Taylor Glacier in the McMurdo Dry Valleys, Antarctica, and dated using Atom Trap Trace Analysis (ATTA). The 81 Kr radiometric ages agree with indepe...