干旱区生态环境知识资源中心(Arid): Geochemical background and dispersion pattern of the world's largest REE deposit of Bayan Obo, China

Arid

DOI	10.1016/j.gexplo.2020.106545
	Geochemical background and dispersion pattern of the world's largest REE deposit of Bayan Obo, China
	Zhou, Jian; Wang, Xueqiu; Nie, Lanshi; McKinley, Jennifer M.; Liu, Hanliang; Zhang, Bimin; Han, Zhixuan
通讯作者	Wang, XQ
来源期刊	JOURNAL OF GEOCHEMICAL EXPLORATION
ISSN	0375-6742
EISSN	1879-1689
出版年	2020
卷号	215
英文摘要	The Bayan Obo deposit is the largest deposit of rare earth elements (REEs) in the world, with its light REE (LREE) reserve constituting approximately 45% of the world's total LREEs. This study identifies the geochemical background of REEs in the Bayan Obo region and investigates REE dispersion pattern along a stream, the fractionation between parent rocks and soils, as well as REE distribution in a weathering profile, to reveal the geochemical behavior of REEs during hypergene processes in semi-arid grasslands. Results show that the REE content in the slates of the Bilute, Jianshan, and Dulahala Formations, which are surrounding rocks of the Bayan Obo deposit, is far higher than those observed in ordinary slate and the continental crust of the North China Craton. These surrounding rocks may have provided sufficient REE sources to form the current, huge REE deposit. The total REE content of stream sediments in the Bayan Obo region ranges from 46.9 to 799.8 mu g/g, with a median of 170.8 mu g/g. Two large-scale REE anomalies were discovered to the west of the Bayan Obo region. The REE content in soil is primarily determined by the parent rock, and no fractionation occurs between heavy REEs (HREEs) and LREEs after the parent rock weathers in semi-arid grasslands. Across the soil profile in Bayan Obo region, REEs typically enrich the surface and deep layers; the middle layer typically contains low REE content owing to the existence of caliche. Along streams, REEs primarily migrate with fine-grained particles over long distances (7 km or longer) via mechanical means. In contrast, coarse-grained particles mainly remain in situ. Affected by aeolian sand, the REE content is relatively low in the 40-80 mesh fraction.
英文关键词	Bayan Obo Rare earth elements Geochemical background Dispersion pattern
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000569087600008
WOS关键词	RARE-EARTH-ELEMENTS ; NB-FE DEPOSIT ; NORTH CHINA ; INNER-MONGOLIA ; ORE-DEPOSIT ; SOILS ; CONSTRAINTS ; TRACE ; AREA ; MOBILIZATION
WOS类目	Geochemistry & Geophysics
WOS研究方向	Geochemistry & Geophysics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/326270
作者单位	[Zhou, Jian; Wang, Xueqiu; Nie, Lanshi; Liu, Hanliang; Zhang, Bimin; Han, Zhixuan] Inst Geophys & Geochem Explorat, Key Lab Geochem Explorat, Langfang 065000, Hebei, Peoples R China; [Zhou, Jian] China Univ Geosci Beijing, Sch Earth Sci & Resources, Beijing 100083, Peoples R China; [Zhou, Jian; Wang, Xueqiu; Nie, Lanshi; Liu, Hanliang; Zhang, Bimin; Han, Zhixuan] UNESCO Int Ctr Global Scale Geochem, Langfang 065000, Hebei, Peoples R China; [McKinley, Jennifer M.] Queens Univ Belfast, Sch Nat & Built Environm, Belfast BT7 1NN, Antrim, North Ireland
推荐引用方式 GB/T 7714	Zhou, Jian,Wang, Xueqiu,Nie, Lanshi,et al. Geochemical background and dispersion pattern of the world's largest REE deposit of Bayan Obo, China[J],2020,215.
APA	Zhou, Jian.,Wang, Xueqiu.,Nie, Lanshi.,McKinley, Jennifer M..,Liu, Hanliang.,...&Han, Zhixuan.(2020).Geochemical background and dispersion pattern of the world's largest REE deposit of Bayan Obo, China.JOURNAL OF GEOCHEMICAL EXPLORATION,215.
MLA	Zhou, Jian,et al."Geochemical background and dispersion pattern of the world's largest REE deposit of Bayan Obo, China".JOURNAL OF GEOCHEMICAL EXPLORATION 215(2020).