Fluctuation history of the interior East Antarctic Ice Sheet since mid-Pliocene
文献类型：期刊论文
| 作者 | Huang, Feixin1; Liu, Xiaohan1; Kong, Ping2; Fink, David3; Ju, Yitai2; Fang, Aimin2; Yu, Liangjun2; Li, Xiaoli2; Na, Chunguang2 |
| 刊名 | ANTARCTIC SCIENCE
 |
| 出版日期 | 2008-04-01 |
| 卷号 | 20期号:2页码:197-203 |
| 关键词 | bedrock cosmogenic exposure age Grove Mountains stable |
| ISSN号 | 0954-1020 |
| DOI | 10.1017/S0954102007000910 |
| 文献子类 | Article |
| 英文摘要 | Cosmogenic (10)Be and (26)Al measurements from bedrock exposures in East Antarctica provide indications of how long the rock surface has been free from glacial cover. Samples from the crests of Zakharoff Ridge and Mount Harding, two typical nunataks in the Grove Mountains, show minimum (10)Be ages of 2.00 +/- 0.22 and 2.30 +/- 0.26 Ma, respectively. These ages suggest that the crests were above the ice sheet at least since the Plio -Pleistocene boundary. Adopting a 'reasonable' erosion rate of 5-10 cm Ma(-1) increases the exposure ages of these two samples to extend into the mid-Pliocene. The bedrock exposure ages steadily decrease with decreasing elevation on the two nunataks, which indicates similar to 200 m decrease of the ice sheet in the Grove Mountains since mid-Pliocene time. Seven higher elevation samples exhibit a simple exposure history, which indicates that the ice sheet in the Grove Mountains decreased only similar to 100 in over a period as long as 1-2 Ma. This suggests that the East Antarctic Ice Sheet (EAIS) was relatively stable during the Pliocene warm interval. Five lower elevation samples suggest a complex exposure history, and indicate that the maximum subsequent increase of the EAIS was only 100 in higher than the present ice surface. Considering the uncertainties, their total initial exposure and subsequent burial time could be later than mid-Pliocene, which may not conflict with the stable mid-Pliocene scenario. |
| WOS关键词 | LAST GLACIAL MAXIMUM ; COSMOGENIC NUCLIDES ; GROVE MOUNTAINS ; SIRIUS GROUP ; PRODUCTION-RATES ; ROSS EMBAYMENT ; EXPOSURE AGES ; DRY-VALLEYS ; LAND ; DEGLACIATION |
| WOS研究方向 | Environmental Sciences & Ecology ; Physical Geography ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000254926000010 |
| 出版者 | CAMBRIDGE UNIV PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/68804]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Huang, Feixin |
| 作者单位 | 1.Chinese Acad Sci, Inst Tibetal Plateau Res, Beijing 100085, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 3.Australian Nucl Sci & Technol Org, Menai, NSW 2234, Australia |
| 推荐引用方式 GB/T 7714 | Huang, Feixin,Liu, Xiaohan,Kong, Ping,et al. Fluctuation history of the interior East Antarctic Ice Sheet since mid-Pliocene[J]. ANTARCTIC SCIENCE,2008,20(2):197-203. |
| APA | Huang, Feixin.,Liu, Xiaohan.,Kong, Ping.,Fink, David.,Ju, Yitai.,...&Na, Chunguang.(2008).Fluctuation history of the interior East Antarctic Ice Sheet since mid-Pliocene.ANTARCTIC SCIENCE,20(2),197-203. |
| MLA | Huang, Feixin,et al."Fluctuation history of the interior East Antarctic Ice Sheet since mid-Pliocene".ANTARCTIC SCIENCE 20.2(2008):197-203. |
入库方式： OAI收割
来源：地质与地球物理研究所
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