DOI: 10.1002/2016GL069889
论文题名: Million year old ice found under meter thick debris layer in Antarctica
作者: Bibby T. ; Putkonen J. ; Morgan D. ; Balco G. ; Shuster D.L.
刊名: Geophysical Research Letters
ISSN: 0094-8923
EISSN: 1944-8654
出版年: 2016
卷: 43, 期: 13 起始页码: 6995
结束页码: 7001
语种: 英语
英文关键词: ancient ice
; Antarctica
; cosmogenic isotopes
; sublimation till
Scopus关键词: Debris
; Isotopes
; Landforms
; Antarctica
; Cosmogenic isotopes
; Cosmogenic nuclides
; Glacial till
; Land surface
; Measurements of
; Paleoclimates
; Valley floor
; Ice
英文摘要: Cosmogenic nuclide measurements associated with buried glacier ice in Ong Valley, in the Transantarctic Mountains, suggest the preservation of ancient ice. There are three glacial tills on the valley floor which have formed from the concentration of regolith contained within sublimating glacier ice. Two tills are less than 1 m thick and underlain by ice. Measurements of cosmogenic 10Be, 26Al, and 21Ne show that (i) the youngest buried ice unit and corresponding till are at least 11–13 ka, (ii) another ice unit and corresponding intermediate-age till are at least 1.1 Ma old under any circumstances and most likely older than 1.78 Ma, and (iii) the oldest till is at least 1.57 Ma and most likely greater than 2.63 Ma. These observations highlight the longevity of ice under thin debris layers and the potential to sample ancient ice for paleoclimate/paleoatmosphere information close to the present land surface. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84978140762&doi=10.1002%2f2016GL069889&partnerID=40&md5=c9c975a2f994590d35c8f2063b7af049
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9886
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Harold Hamm School of Geology and Geological Engineering, University of North Dakota, Grand Forks, ND, United States
Recommended Citation:
Bibby T.,Putkonen J.,Morgan D.,et al. Million year old ice found under meter thick debris layer in Antarctica[J]. Geophysical Research Letters,2016-01-01,43(13).