干旱区生态环境知识资源中心(Arid): Geochemistry of surface soil in the Eastern Pamirs and its implications for Muztagata ice core dust provenance

Arid

DOI	10.1016/j.apgeochem.2020.104724
	Geochemistry of surface soil in the Eastern Pamirs and its implications for Muztagata ice core dust provenance
	Gu, Fei; Wu, Guangjian; Zhang, Chenglong; Yan, Ni; Huang, Ju
通讯作者	Wu, GJ
来源期刊	APPLIED GEOCHEMISTRY
ISSN	0883-2927
EISSN	1872-9134
出版年	2020
卷号	121
英文摘要	Determining the geochemical composition of mineral dust is highly effective for provenance tracing. Studies on the geochemistry of surface soils in the Pamirs, especially with different size fractions, are relatively limited. This study investigated the major, trace and rare earth elements (REEs) of surface soil samples collected on the Eastern Pamirs. The Fe/Al (similar to 0.60), Mg/Al (similar to 0.30) and Ti/Al (similar to 0.05) ratios clearly highlight its clayey nature, while the La/Th (similar to 2.60) and Th/U (similar to 4.00) ratios indicate it is typical of the upper continental crust (UCC). The La-Th-Sc and Zr/10-Th-Sc ternary diagrams show the source rock of the Eastern Pamirs surface soil to be mainly felsic. The bulk and <20 mu m fractions were separated and analysed, showing similar REE patterns. However, the La-N/Sm-N, delta Ce, Ce/Nd, Th/Tb and Y/Er ratios of the <20 mu m fraction differ from those of the bulk, suggesting particle size sorting has a significant impact on the elemental composition of surface soil samples. The Taklimakan Desert sand samples partly display similar tracing indices while the Eastern Pamirs surface soil samples generally show different provenance indexes compared to the Muztagata ice core and aerosol dust, indicating that the Taklimakan Desert might be an important contributor to the Muztagata ice core/aerosol dust and the local contribution is minor. Analysis of the MODIS AOD fields, wind streamline fields and HYSPLIT backward trajectory model demonstrates certain atmospheric circulation patterns and dust transport pathways in the Eastern Pamirs, which allows for sourcing of Muztagata dust from the Taklimakan Desert, Central Asian deserts, and northern Afghanistan and Pakistan.
英文关键词	Asian dust Geochemical composition Grain-size sorting Eastern Pamirs Atmospheric circulation
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000572849100001
WOS关键词	AEOLIAN SEDIMENTS ; CHINESE LOESS ; RARE-EARTH ; REE ; EVOLUTION ; FRACTIONATION ; EMISSION ; AEROSOLS ; GLACIERS ; DEPOSITS
WOS类目	Geochemistry & Geophysics
WOS研究方向	Geochemistry & Geophysics
来源机构	中国科学院青藏高原研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/326508
作者单位	[Gu, Fei; Wu, Guangjian; Yan, Ni; Huang, Ju] Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Tibetan Environm Changes & Land Surface P, Beijing 100101, Peoples R China; [Gu, Fei; Huang, Ju] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Wu, Guangjian] CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China; [Zhang, Chenglong] Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R China
推荐引用方式 GB/T 7714	Gu, Fei,Wu, Guangjian,Zhang, Chenglong,et al. Geochemistry of surface soil in the Eastern Pamirs and its implications for Muztagata ice core dust provenance[J]. 中国科学院青藏高原研究所,2020,121.
APA	Gu, Fei,Wu, Guangjian,Zhang, Chenglong,Yan, Ni,&Huang, Ju.(2020).Geochemistry of surface soil in the Eastern Pamirs and its implications for Muztagata ice core dust provenance.APPLIED GEOCHEMISTRY,121.
MLA	Gu, Fei,et al."Geochemistry of surface soil in the Eastern Pamirs and its implications for Muztagata ice core dust provenance".APPLIED GEOCHEMISTRY 121(2020).