气候变化领域集成服务门户(CCPortal): Rare earth elements in the surface sediments of the Yarlung Tsangbo (Upper Brahmaputra River) sediments, southern Tibetan Plateau

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DOI	10.1016/j.quaint.2009.05.003
	Rare earth elements in the surface sediments of the Yarlung Tsangbo (Upper Brahmaputra River) sediments, southern Tibetan Plateau
	Li, Chaoliu; Kang, Shichang; Zhang, Qianggong; Wang, Feiyue
发表日期	2009
ISSN	1040-6182
EISSN	1873-4553
卷号	208
英文摘要	The Yarlung Tsangbo (YT) is the Tibetan portion of the Brahmaputra River. It transports a large amount of sediment annually to the Indo-Gangetic Plain and thus contributes significantly to the Quaternary evolution of the Plain. Eighteen surface sediment samples were collected from the YT, and the compositions of rare earth elements (REEs) were analyzed for the bulk sediments, <63 mu m and <20 mu m fractions. Results show that the YT sediments originated mainly from the Lhasa Terrane. The REE compositions in the YT sediments are similar along the river, with the light and middle REEs enriched relative to the upper continental crust, but the REE concentrations are higher than its lower reaches - the Brahmaputra River. The average grain size of the sediments is in the coarse range (123.8 mu m). Grain size influences the REE concentrations of the YT sediment significantly. The <63 pm fraction of the sediment has higher REE concentrations and different REE patterns when compared with those in the bulk sample and <20 gm fraction, due to the presence of REE-enriched heavy minerals of zircon, monazite and allanite in this fraction. The relatively low REE concentrations in acid-leachable fractions of the sediments suggest most REEs in the sediments occur in the stable minerals due to the dominance of physical weathering in this region. (C) 2009 Elsevier Ltd and INQUA. All rights reserved.
学科领域	Physical Geography; Geology
语种	英语
WOS研究方向	Geography, Physical ; Geosciences, Multidisciplinary
来源期刊	QUATERNARY INTERNATIONAL
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/111531
作者单位	Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Tibetan Environm Changes & Land Surface P, Beijing 100085, Peoples R China
推荐引用方式 GB/T 7714	Li, Chaoliu,Kang, Shichang,Zhang, Qianggong,et al. Rare earth elements in the surface sediments of the Yarlung Tsangbo (Upper Brahmaputra River) sediments, southern Tibetan Plateau[J]. 中国科学院西北生态环境资源研究院,2009,208.
APA	Li, Chaoliu,Kang, Shichang,Zhang, Qianggong,&Wang, Feiyue.(2009).Rare earth elements in the surface sediments of the Yarlung Tsangbo (Upper Brahmaputra River) sediments, southern Tibetan Plateau.QUATERNARY INTERNATIONAL,208.
MLA	Li, Chaoliu,et al."Rare earth elements in the surface sediments of the Yarlung Tsangbo (Upper Brahmaputra River) sediments, southern Tibetan Plateau".QUATERNARY INTERNATIONAL 208(2009).