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学科主题: 地理学::自然地理学
题名: Mid-late Pleistocene glacial evolution in the Grove Mountains, East Antarctica, constraints from cosmogenic Be-10 surface exposure dating of glacial erratic cobbles
作者: Dong, GC (Dong, Guocheng)1, 3; Huang, FX (Huang, Feixin)2; Yi, CL (Yi, Chaolu)4, 5; Liu, XH (Liu, Xiaohan)4; Zhou, WJ (Zhou, Weijian)1, 3; Caffee, MW (Caffee, Marc W.)6, 7
通讯作者: Huang, FX
刊名: QUATERNARY SCIENCE REVIEWS
发表日期: 2016
DOI: 10.1016/j.quascirev.2016.05.030
卷: 145, 期:0, 页:71-81
收录类别: SCI
合作性质: 国际
文章类型: Article
英文摘要: Glacial histories from the East Antarctic Ice Sheet (EAIS) provide keys to understanding correlations between the EATS and global climate. They are especially helpful in the assessment of global sea level change, and as a means of quantifying the magnitude of past glacial activity and the rate at which ice responded to climate change. Given the significance of EAIS glacial histories, it is imperative that more glacial chronologic data for this region be obtained, especially for the mid-to-late Pleistocene. We report cosmogenic Be-10 surface exposure dating results from glacially transported cobbles embedded in blue-ice moraine material at Mount Harding, the Grove Mountains, EAIS. Forty exotic cobbles sampled along two profiles (A and B) on this blue-ice moraine present apparent exposure-ages ranging from 7.2 to 542.2 ka. We explore this scattered dataset by using Principal Component Analysis (PCA) to identify statistically significant trends in the data. We identify a correlation between exposure-age and distance of the cobbles from Mount Harding. In profile A, cobbles further from Mount Harding yield older exposure-ages than those that are relatively close. In profile B, cobbles closer to Mount Harding are found to have relatively older exposure-ages. In term of glacial history we suggest that the direction of ice flow changed during the period from similar to 60 to 200 ka, and that multiple glacial fluctuations occurred in the mid-late Pleistocene. (C) 2016 Elsevier Ltd. All rights reserved.
语种: 英语
WOS记录号: WOS:000380602700003
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.itpcas.ac.cn/handle/131C11/7651
Appears in Collections:图书馆_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China
2.China Met Geol Bur, Inst Mineral Resources Res, Beijing 101300, Peoples R China
3.Natl Ctr Accelerator Mass Spectrometry Xian, Shaanxi Prov Key Lab Accelerator Mass Spectrometr, Xian 710061, Peoples R China
4.Chinese Acad Sci, Inst Tibetan Plateau Res, Beijing 100101, Peoples R China
5.Chinese Acad Sci, Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China
6.Purdue Univ, Dept Phys & Astron, W Lafayette, IN 47907 USA
7.Purdue Univ, Dept Earth Atmospher & Planetary Sci, W Lafayette, IN 47907 USA

Recommended Citation:
Dong, GC ,Huang, FX ,Yi, CL ,et al. Mid-late Pleistocene glacial evolution in the Grove Mountains, East Antarctica, constraints from cosmogenic Be-10 surface exposure dating of glacial erratic cobbles[J]. QUATERNARY SCIENCE REVIEWS,2016,145(0):71-81.
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文件名: V.145 71-81 2016.pdf
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