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DOI10.1016/j.gloplacha.2009.02.003
Element composition of dust from a shallow Dunde ice core, Northern China
Wu, Guangjian; Zhang, Chenglong; Gao, Shaopeng; Yao, Tandong; Tian, Lide; Xia, Dunsheng
发表日期2009
ISSN0921-8181
卷号67期号:2019-03-04页码:186-192
英文摘要

The Dunde ice cap (38 degrees 06‘N, 96 degrees 24‘E, with a summit of 5325 m) is situated at the centre of the northern Chinese deserts and receives dust from these regions. Here, we present the trace and rare earth element (REE) compositions of dust extracted from a shallow ice core from the Dunde ice cap, which provide a framework to trace the source of Dunde dust. Trace and REE parameters of Dunde dust show characteristics of a typical eolian deposit, with an average La/Th ratio of 2.6, a Th/U ratio of 3.7, and a strong negative Eu anomaly (0.61). The dirty layers in the ice core section have the same element characteristics as in the clear layers, indicating that the dust in Dunde is well-mixed and has a stable composition. Trace element and REE ratio plots show that Dunde dust has a similar composition to the finer fraction materials in the Taklimakan desert, suggesting that the Tarim Basin might be an important source for Dunde dust under the present circulation, but not favoring a material contribution from Badain Jaran. Our results reveal distinct differences in composition between Dunde dust and Chinese loess materials, which suggests that they have different sources. (C) 2009 Elsevier B.V. All rights reserved.


英文关键词Asian dust;Dunde ice core;element composition;Tibetan Plateau
语种英语
WOS研究方向Physical Geography ; Geology
WOS类目Geography, Physical ; Geosciences, Multidisciplinary
WOS记录号WOS:000266753900005
来源期刊GLOBAL AND PLANETARY CHANGE
来源机构中国科学院青藏高原研究所
文献类型期刊论文
条目标识符http://gcip.llas.ac.cn/handle/2XKMVOVA/549
推荐引用方式
GB/T 7714
Wu, Guangjian,Zhang, Chenglong,Gao, Shaopeng,et al. Element composition of dust from a shallow Dunde ice core, Northern China[J]. 中国科学院青藏高原研究所,2009,67(2019-03-04):186-192.
APA Wu, Guangjian,Zhang, Chenglong,Gao, Shaopeng,Yao, Tandong,Tian, Lide,&Xia, Dunsheng.(2009).Element composition of dust from a shallow Dunde ice core, Northern China.GLOBAL AND PLANETARY CHANGE,67(2019-03-04),186-192.
MLA Wu, Guangjian,et al."Element composition of dust from a shallow Dunde ice core, Northern China".GLOBAL AND PLANETARY CHANGE 67.2019-03-04(2009):186-192.
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