干旱区生态环境知识资源中心(Arid): Groundwater controls REE mineralisation in the regolith of South China

Arid

DOI	10.1016/j.chemgeo.2021.120295
	Groundwater controls REE mineralisation in the regolith of South China
	Huang, Jian; He, Hongping; Tan, Wei; Liang, Xiaoliang; Ma, Lingya; Wang, Yuanyuan; Qin, Xiaorong; Zhu, Jianxi
通讯作者	He, HP (corresponding author), Chinese Acad Sci, Guangzhou Inst Geochem, CAS Key Lab Mineral & Metallogeny, Guangdong Prov Key Lab Mineral Phys & Mat, Guangzhou 510640, Peoples R China.
来源期刊	CHEMICAL GEOLOGY
ISSN	0009-2541
EISSN	1872-6836
出版年	2021
卷号	577
英文摘要	Regolith-hosted rare earth element (REE) deposits in South China have attracted widespread attention due to their crucial applications in technology and renewable energy solutions. However, the factors that control the formation of REE deposits in regolith remain poorly understood. Groundwater plays important roles in the physico-chemical environments of regolith. In particular, groundwater in the vadose and saturated zones, which are divided by the groundwater table, has distinct hydrological and physico-chemical properties and is likely to impose different effects on activation, migration, and enrichment of REEs in regolith. Our comprehensive geochemical and mineralogical investigations of the Renju REE deposits in South China suggest that the abrupt change of cerium (Ce) anomaly values, the occurrence of Fe-REE oxide colloids, and the prominent variation of goethite and hematite contents can be used as effective indicators for the groundwater table in the regolith. The distribution and geochemical behaviour of REEs reveal that the highly permeable vadose zone facilitates the downward migration of REEs liberated via dissolution of REE-bearing minerals by seepage water, whereas the relatively stable and high-pH saturated zone facilitates the adsorption of REE ions by kaolinite and halloysite. The long-term eluviation-illuviation processes led to the continuous accumulation of REEs in the saturated zone and, ultimately, the formation of lenticular-shaped REE ore bodies. The present study highlights the distinctive roles of groundwater in the vadose and saturated zones with regard to the activation, migration, and enrichment of REEs in the regolith of South China.
英文关键词	Groundwater Groundwater table Ion exchangeable REEs Regolith-hosted REE deposits
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000662689600004
WOS关键词	RARE-EARTH-ELEMENTS ; ARID-ZONE SOILS ; LATERITE PROFILE ; VADOSE ZONE ; FRACTIONATION ; GEOCHEMISTRY ; ADSORPTION ; MINERALS ; DEPOSITS ; GRANITE
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/2XILL650/349833
作者单位	[Huang, Jian; He, Hongping; Tan, Wei; Liang, Xiaoliang; Ma, Lingya; Wang, Yuanyuan; Qin, Xiaorong; Zhu, Jianxi] Chinese Acad Sci, Guangzhou Inst Geochem, CAS Key Lab Mineral & Metallogeny, Guangdong Prov Key Lab Mineral Phys & Mat, Guangzhou 510640, Peoples R China; [Huang, Jian; He, Hongping; Tan, Wei; Liang, Xiaoliang; Ma, Lingya; Wang, Yuanyuan; Qin, Xiaorong; Zhu, Jianxi] CAS Ctr Excellence Deep Earth Sci, Guangzhou 510640, Peoples R China; [Huang, Jian; He, Hongping; Liang, Xiaoliang; Wang, Yuanyuan; Qin, Xiaorong; Zhu, Jianxi] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Huang, Jian,He, Hongping,Tan, Wei,et al. Groundwater controls REE mineralisation in the regolith of South China[J],2021,577.
APA	Huang, Jian.,He, Hongping.,Tan, Wei.,Liang, Xiaoliang.,Ma, Lingya.,...&Zhu, Jianxi.(2021).Groundwater controls REE mineralisation in the regolith of South China.CHEMICAL GEOLOGY,577.
MLA	Huang, Jian,et al."Groundwater controls REE mineralisation in the regolith of South China".CHEMICAL GEOLOGY 577(2021).