干旱区生态环境知识资源中心(Arid): Occurrence and mechanism of uranium enrichment with a unique eolian sedimental environment in the Pengyang uranium deposit, Ordos Basin

Arid

DOI	10.1016/j.oregeorev.2021.104641
	Occurrence and mechanism of uranium enrichment with a unique eolian sedimental environment in the Pengyang uranium deposit, Ordos Basin
	Zhao, Hualei; Ao, Cong; Li, Jianguo; Chen, Lulu; Zhang, Bo; Miao, Peisen; Si, Qinghong; Zhu, Qiang; Yu, Rengan; Chen, Yin
通讯作者	Zhao, HL ; Ao, C (corresponding author)，China Geol Survey, Tianjin Ctr, Tianjin 300170, Peoples R China.
来源期刊	ORE GEOLOGY REVIEWS
ISSN	0169-1368
EISSN	1872-7360
出版年	2022
卷号	141
英文摘要	The Pengyang uranium deposit is a recently discovered large-scale uranium deposit in the Lower Cretaceous Luohe Formation in the southwestern Ordos Basin, China, and this high content of active uranium in the ore suggests that the Pengyang uranium deposit is generally suitable for in situ leaching mining. In this study, the uraniferous sandstones from the Luohe Formation were analyzed in detail. The mineral symbiosis and uranium occurrence state were studied using scanning electron microscopy, energy spectral analysis, backscattering detection, electron probe microanalysis, and sequential extraction procedures for uranium. Results show that the uranium minerals are mostly disseminated, clustered, or veinlet, being distributed along the edges and in the pores between detrital grains, and they are usually closely symbiotic with anatase, pyrite, apatite, and clay minerals. The uranium minerals are mainly pitchblende, with a small amount of coffinite. The results of sequential extraction procedures reveal that the uranium in uraniferous sandstones mainly exists in two occurrence forms of uranium minerals and adsorbed uranium and that the proportion of minerals is significantly higher than that of adsorbed uranium. The contents of carbonate-bound uranium and organic-pyrite-bound uranium in medium- and high-grade samples increased notably. The formation of the Pengyang uranium deposit is closely related to the participation of reducing fluids such as oil and gas. The types and symbiotic relationships of altered minerals in the deposit indicate that ore-bearing sandstones have experienced a variety of fluid activities. Numerous alteration minerals, including anatase, pyrite, apatite, and clay minerals, in the uraniferous sandstone have played various roles in the complex mineralization process of adsorption, catalysis, reduction, and precipitation. In-situ S isotope of the colloidal pyrite shows that the biological process is of great significance to the enrichment and precipitation of colloidal pyrite and uranium. These may be the important mechanisms of uranium precipitation and enrichment.
英文关键词	Uranium occurrence state Enrichment mechanism Sandstone-type uranium deposit Luohe Formation Ordos Basin
类型	Article
语种	英语
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:000747580800001
WOS关键词	CARBONIFEROUS BLACK SHALE ; ORE-FORMING PROCESSES ; CRETACEOUS DESERT ; ERLIAN BASIN ; SANDSTONE ; GENESIS ; REDUCTION ; CHINA ; PYRITE ; BIOMINERALIZATION
WOS类目	Geology ; Mineralogy ; Mining & Mineral Processing
WOS研究方向	Geology ; Mineralogy ; Mining & Mineral Processing
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/376903
作者单位	[Zhao, Hualei; Ao, Cong; Chen, Lulu; Zhang, Bo; Miao, Peisen; Zhu, Qiang; Yu, Rengan; Chen, Yin] China Geol Survey, Tianjin Ctr, Tianjin 300170, Peoples R China; [Zhao, Hualei; Ao, Cong; Li, Jianguo; Chen, Lulu; Zhang, Bo; Si, Qinghong; Zhu, Qiang; Yu, Rengan; Chen, Yin] China Geol Survey, Key Lab Uranium Geol, Tianjin 300170, Peoples R China; [Li, Jianguo] China Geol Survey, Cores & Samples Ctr Nat Resources, Beijing 100192, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Hualei,Ao, Cong,Li, Jianguo,et al. Occurrence and mechanism of uranium enrichment with a unique eolian sedimental environment in the Pengyang uranium deposit, Ordos Basin[J],2022,141.
APA	Zhao, Hualei.,Ao, Cong.,Li, Jianguo.,Chen, Lulu.,Zhang, Bo.,...&Chen, Yin.(2022).Occurrence and mechanism of uranium enrichment with a unique eolian sedimental environment in the Pengyang uranium deposit, Ordos Basin.ORE GEOLOGY REVIEWS,141.
MLA	Zhao, Hualei,et al."Occurrence and mechanism of uranium enrichment with a unique eolian sedimental environment in the Pengyang uranium deposit, Ordos Basin".ORE GEOLOGY REVIEWS 141(2022).