气候变化领域集成服务门户(CCPortal): Effectiveness of rare earth elements constrain on different materials: a case study in central Asia

CCPortal

DOI	10.1007/s12665-012-1586-2
	Effectiveness of rare earth elements constrain on different materials: a case study in central Asia
	Li, Chaoliu; Kang, Shichang; Zhang, Qianggong; Sharma, Chhatra Mani
发表日期	2012
ISSN	1866-6280
EISSN	1866-6299
卷号	67 期号:5
英文摘要	Rare earth elements (REE) have been extensively used to indicate for material provenance since they behave conservatively and mainly transport in particulate form during earth surface processes. Nevertheless, the application of REE for material provenance study has to be cautious because grain size and mineral fractionations can alter bulk compositions of weathered sediments. Central Asia is one of the most important dust source regions globally and numerous studies on REE compositions of surface materials have been conducted. In this study, REE compositions of various materials from this area are summarized to explore the existing REE-related problems. Overall, chondrite-normalized REE patterns for many surface materials are so uniform that they cannot serve as reliable approaches in tracing material source regions. In contrast, great variations of REE compositions occur among different materials that are derived even from the same parent rock due to influences of grain-size distributions and heavy minerals. For the same reason, small-scale loess around the Tibetan Plateau has different upper continental crust (UCC)-normalized REE patterns compared to those of typical loess. Therefore, great cautions should be made when UCC-normalized REE patterns and REE ratios are utilized to investigate material provenance. Finally, some suggestions are proposed for such studies in future.
关键词	Rare earth elements Material provenance Upper continental crust Central Asia
学科领域	Environmental Sciences & Ecology; Geology; Water Resources
语种	英语
WOS研究方向	Environmental Sciences ; Geosciences, Multidisciplinary ; Water Resources
来源期刊	ENVIRONMENTAL EARTH SCIENCES
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/111645
作者单位	Chinese Acad Sci, Key Lab Tibetan Environm Changes & Land Surface P, Inst Tibetan Plateau Res, Beijing 100085, Peoples R China
推荐引用方式 GB/T 7714	Li, Chaoliu,Kang, Shichang,Zhang, Qianggong,et al. Effectiveness of rare earth elements constrain on different materials: a case study in central Asia[J]. 中国科学院西北生态环境资源研究院,2012,67(5).
APA	Li, Chaoliu,Kang, Shichang,Zhang, Qianggong,&Sharma, Chhatra Mani.(2012).Effectiveness of rare earth elements constrain on different materials: a case study in central Asia.ENVIRONMENTAL EARTH SCIENCES,67(5).
MLA	Li, Chaoliu,et al."Effectiveness of rare earth elements constrain on different materials: a case study in central Asia".ENVIRONMENTAL EARTH SCIENCES 67.5(2012).