DOI: 10.1002/2016GL070100
论文题名: The deep accumulation of 10Be at Utsira, southwestern Norway: Implications for cosmogenic nuclide exposure dating in peripheral ice sheet landscapes
作者: Briner J.P. ; Goehring B.M. ; Mangerud J. ; Svendsen J.I.
刊名: Geophysical Research Letters
ISSN: 0094-8667
EISSN: 1944-8398
出版年: 2016
卷: 43, 期: 17 起始页码: 9121
结束页码: 9129
语种: 英语
英文关键词: 10Be
; cosmogenic nuclide exposure dating
; glacier erosion
; Last Glacial Maximum
; muon
Scopus关键词: Charged particles
; Erosion
; Glacial geology
; Glaciers
; Isotopes
; Bedrock depth
; Cosmogenic nuclides
; Deglaciations
; Glacial erosion
; Ice sheet history
; Last Glacial Maximum
; Long lasting
; Muon
; Ice
; bedrock
; beryllium isotope
; boulder
; chronology
; cosmogenic radionuclide
; data set
; deglaciation
; electron
; erratic
; geoaccumulation
; glacial erosion
; Last Glacial Maximum
; radiocarbon dating
; Scandinavian Ice Sheet
; Norway
英文摘要: Cosmogenic nuclide exposure dating is a widely used method for constraining past ice sheet histories. We scrutinize a recently published data set of cosmogenic 10Be data from erratic boulders in Norway used to constrain the deglaciation of the western Scandinavian Ice Sheet to 20 ka. Our model of the 10Be inventory in glacial surfaces leads us to conclude that the chronology may be afflicted by the deep subsurface accumulation of 10Be during long-lasting ice-free periods that resulted in 10Be ages >10% too old. We suggest that the majority of the dated erratic boulders contain a uniform level of inherited muon-produced 10Be and were derived from bedrock depths >2.5 m and most likely ~4 m. The implication of our finding is that for landscapes that experience long ice-free periods between brief maximum glacial phases, glacial erosion of >5 m is required to remove detectable traces of inherited 10Be. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84987749282&doi=10.1002%2f2016GL070100&partnerID=40&md5=e3589a68bc9c412c88f57e264d866b85
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9630
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: Department of Geology, University at Buffalo, Buffalo, NY, United States
Recommended Citation:
Briner J.P.,Goehring B.M.,Mangerud J.,et al. The deep accumulation of 10Be at Utsira, southwestern Norway: Implications for cosmogenic nuclide exposure dating in peripheral ice sheet landscapes[J]. Geophysical Research Letters,2016-01-01,43(17).