globalchange  > 过去全球变化的重建
DOI: 10.1016/j.quascirev.2016.05.030
Scopus记录号: 2-s2.0-84973359580
论文题名:
Mid-late Pleistocene glacial evolution in the Grove Mountains, East Antarctica, constraints from cosmogenic 10Be surface exposure dating of glacial erratic cobbles
作者: Dong G.; Huang F.; Yi C.; Liu X.; Zhou W.; Caffee M.W.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2016
卷: 145
起始页码: 71
结束页码: 81
语种: 英语
英文关键词: Blue-ice moraine ; Cosmogenic 10Be exposure dating ; East Antarctic ice sheet ; Grove Mountains ; Mount Harding
Scopus关键词: Climate change ; Glaciers ; Ice ; Landforms ; Principal component analysis ; Sea level ; Blue ice ; Cosmogenic ; East antarctic ice sheets ; Grove Mountains ; Mount Harding ; Glacial geology ; climate change ; cosmogenic radionuclide ; erratic ; glacial environment ; glacial history ; ice flow ; ice sheet ; moraine ; Pleistocene ; sea level change ; Antarctic Ice Sheet ; Antarctica ; East Antarctic Ice Sheet ; East Antarctica ; Grove Mountains
英文摘要: Glacial histories from the East Antarctic Ice Sheet (EAIS) provide keys to understanding correlations between the EAIS 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 10Be 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 ~60 to 200 ka, and that multiple glacial fluctuations occurred in the mid-late Pleistocene. © 2016 Elsevier Ltd.
资助项目: This work was supported by the National Natural Science Foundation of China (Grant Nos. 41176166, 41230523, and 41271018). We are grateful to Jennifer C. H. Newall from Stockholm University and an anonymous reviewer for their thorough reviews that helped significantly improve this manuscript. The samples were processed in the Key Laboratory of Tibetan Environment Changes and Land Surface Process, Institute of Tibetan Plateau Research at Lhasa. We thank Baojin Qiao and Jinhua Liu from Institute of Tibetan Plateau Research, Chinese Academy of Sciences for their help in sample preparation. We appreciate Tom Clifton at PRIME lab, Purdue University for sample measurements. We thank George Burr from the University of Arizona and Xiangke Xu from Institute of Tibetan Plateau Research, Chinese Academy of Sciences for their constructive suggestions.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59545
Appears in Collections:过去全球变化的重建

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作者单位: State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, China; Institute of Mineral Resources Research, China Metallurgical Geology Bureau, Beijing, China; Shaanxi Provincial Key Laboratory of Accelerator Mass Spectrometry Technology and Application, National Center for Accelerator Mass Spectrometry in Xi'an, Xi'an, China; Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, China; Center for Excellence in Tibetan Plateau Earth Sciences, Chinese Academy of Sciences, Beijing, China; Department of Physics and Astronomy, Purdue University, West Lafayette, United States; Department of Earth, Atmospheric, and Planetary Sciences, Purdue University, West Lafayette, United States

Recommended Citation:
Dong G.,Huang F.,Yi C.,et al. Mid-late Pleistocene glacial evolution in the Grove Mountains, East Antarctica, constraints from cosmogenic 10Be surface exposure dating of glacial erratic cobbles[J]. Quaternary Science Reviews,2016-01-01,145
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