DOI: 10.1016/j.quascirev.2016.05.001
Scopus记录号: 2-s2.0-84968735358
论文题名: Dating the onset of LGM ice surface lowering in the High Alps
作者: Wirsig C. ; Zasadni J. ; Christl M. ; Akçar N. ; Ivy-Ochs S.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2016
卷: 143 起始页码: 37
结束页码: 50
语种: 英语
英文关键词: 10Be
; Deglaciation
; Mont Blanc
; Zillertal
Scopus关键词: Glacial geology
; Deglaciations
; Exposure age
; High elevation
; Ice surfaces
; Last Glacial Maximum
; Lateglacial
; Mont Blanc
; Zillertal
; Ice
; beryllium isotope
; chronology
; dating method
; deglaciation
; geoaccumulation
; glacier
; interstadial
; Last Glacial Maximum
; research work
; synchrony
; Alps
; Austria
; Eastern Alps
; Haute Savoie
; Italy
; Mont Blanc
; Savoy Alps
; Western Alps
; Zillertal Alps
英文摘要: The general chronological outline of the Last Glacial Maximum (LGM) in the Alps is well known after more than two centuries of ice age research in Europe. Current studies focus on resolving the details of the deglaciation process after the LGM. Particularly few data in this context are available from the High Alps. Here we report chronological constraints on the onset of deglaciation in two different study areas from the Western and Eastern Alps: the Mont Blanc (Italy) and Zillertal Alps (Austria). We sampled 32 bedrock and boulder surfaces from high elevation ridges beneath the glacial trimline. The oldest 10Be exposure ages of ~18.5 ka correspond to the initiation of lowering of the LGM ice surface. Identical ages from both study areas suggest synchronous decay of the LGM glaciers in the accumulation zones of the Western and Eastern Alps. Thus, the High Alpine ice surface lowered roughly synchronously to the downwasting of the glacier tongues in the forelands that was completed 19-18 ka. In both study areas, ages of numerous samples that are consistently 2-3 ka younger than 18.5 ka suggest the persistance of remnant ice patches at high elevations in the Lateglacial accumulation zones approximately until the Bølling-Allerød interstadial. © 2016 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59576
Appears in Collections: 过去全球变化的重建
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作者单位: Laboratory of Ion Beam Physics, ETH Zürich, Otto-Stern-Weg 5, Zürich, Switzerland; Faculty of Geology, Geophysics and Environmental Protection, AGH University of Science and Technology, al. A. Mickiewicza 30, Kraków, Poland; Institute of Geological Sciences, University of Bern, Baltzerstrasse 1+3, Bern, Switzerland
Recommended Citation:
Wirsig C.,Zasadni J.,Christl M.,et al. Dating the onset of LGM ice surface lowering in the High Alps[J]. Quaternary Science Reviews,2016-01-01,143