Arid
DOI10.1016/j.quascirev.2012.09.026
Multiple cosmogenic nuclides document the stability of the East Antarctic Ice Sheet in northern Victoria Land since the Late Miocene (5-7 Ma)
Di Nicola, Luigia1; Baroni, Carlo2,3; Strasky, Stefan4; Salvatore, Maria Cristina2; Schluechter, Christian5; Akcar, Naki5; Kubik, Peter W.6; Wieler, Rainer4
通讯作者Di Nicola, Luigia
来源期刊QUATERNARY SCIENCE REVIEWS
ISSN0277-3791
出版年2012
卷号57页码:85-94
英文摘要

The timing and amplitude of changes in the Antarctic ice level are relevant to understanding past climate fluctuations and ongoing changes in the global climate and sea levels. In this study, we present surface exposure ages based on in situ produced cosmogenic Be-10 and Ne-21 in the bedrock samples of glacially eroded relict surfaces from the Deep Freeze Range, northern Victoria Land. The proximity of this region to the East Antarctic Ice Sheet indicates that the area is sensitive to variations in inland ice volume, permitting the investigation of the behavioural relationship between the East Antarctic Ice Sheet and the alpine glacial system in northern Victoria Land. Dating erosional surfaces provides a precise chronology of northern Victoria Land paleoclimate evolution and allows us to correlate the East Antarctic Ice Sheet response to global climate events and local ice level variations. The Be-10 and Ne-21 concentrations from the highest peaks of the Deep Freeze Range strongly indicate that the relict landscape features were continuously exposed for 5-7 Ma. Denudation rates inferred from our data show that the erosion rate of the summits has been extremely low (similar to 5 cm/Ma) for at least 5-7 Ma. Along with evidence of persistent climate stability (cold and arid conditions) from other sectors of the Transantarctic Mountains. our results indicate that the transition from the wet-based to the cold-based glacial regime in northern Victoria Land occurred after the creation of the polar East Antarctic Ice Sheet in the Middle Miocene. (C) 2012 Elsevier Ltd. All rights reserved.


英文关键词Antarctica Northern Victoria Land Multiple cosmogenic nuclide approach Exposure ages Glacial geomorphology Erosion rate Climate stability of East Antarctic Ice Sheet
类型Article
语种英语
国家Scotland ; Italy ; Switzerland
收录类别SCI-E
WOS记录号WOS:000312355900007
WOS关键词TERRA-NOVA BAY ; SURFACE EXPOSURE AGES ; ROSS SEA REGION ; TRANSANTARCTIC-MOUNTAINS ; PRODUCTION-RATES ; DRY VALLEYS ; HALF-LIFE ; LANDSCAPE EVOLUTION ; BEACON SUPERGROUP ; TERRESTRIAL ROCKS
WOS类目Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向Physical Geography ; Geology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/174726
作者单位1.SUERC, E Kilbride G75 0QF, Lanark, Scotland;
2.Univ Pisa, Dipartimento Sci Terra, I-56126 Pisa, Italy;
3.CNR, Ist Geosci & Georisorse, I-56126 Pisa, Italy;
4.ETH, Inst Geochem & Petrol, CH-8092 Zurich, Switzerland;
5.Univ Bern, Inst Geol Sci, CH-3012 Bern, Switzerland;
6.ETH, Lab Ion Beam Phys, CH-8093 Zurich, Switzerland
推荐引用方式
GB/T 7714
Di Nicola, Luigia,Baroni, Carlo,Strasky, Stefan,et al. Multiple cosmogenic nuclides document the stability of the East Antarctic Ice Sheet in northern Victoria Land since the Late Miocene (5-7 Ma)[J],2012,57:85-94.
APA Di Nicola, Luigia.,Baroni, Carlo.,Strasky, Stefan.,Salvatore, Maria Cristina.,Schluechter, Christian.,...&Wieler, Rainer.(2012).Multiple cosmogenic nuclides document the stability of the East Antarctic Ice Sheet in northern Victoria Land since the Late Miocene (5-7 Ma).QUATERNARY SCIENCE REVIEWS,57,85-94.
MLA Di Nicola, Luigia,et al."Multiple cosmogenic nuclides document the stability of the East Antarctic Ice Sheet in northern Victoria Land since the Late Miocene (5-7 Ma)".QUATERNARY SCIENCE REVIEWS 57(2012):85-94.
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