The geochemical behavior of uranium and mineralization : South China uranium province as an example

doi:10.18654/1000-0569/2020.01.05

	The geochemical behavior of uranium and mineralization : South China uranium province as an example
	Wang Kun1,2 ; Deng JiangHong 1; Hao XiLuo 3,4
	2020
发表期刊	ACTA PETROLOGICA SINICA
ISSN	1000-0569
卷号	36 期号:1 页码:35-43
通讯作者	Hao XiLuo([email protected])
摘要	Uranium is a strong incompatible element, which is continuously enriched with the evolution of magma. At the end of magma evolution, uranium is affected by the increase of structural oxygen and enters accessory minerals, such as monazite and xenotime. Magmatic evolution usually can't lead to the formation of uranium deposits. Uranium is a variable valence element which is sensitive to oxygen fugacity. During supergene weathering process, uranium in rock is oxidized to UO22+ and easily dissolved into high oxygen fugacity fluid, which is then precipitated and enriched in reducing environments, favorable for mineralization. Influenced by the Neoproterozoic Oxidation Event and the end of Marinoan ice age, more U entered water during supergene weathering. The Cambrian Explosion resulted in reducing environment in sedimentary basins, forming black shale rich in organic matter, which was favorable to the precipitation and enrichment of U, responsible for the formation of Sinian and Lower Cambrian uranium-rich black shale in South China. The uranium-rich black shale was the main uranium source for uranium deposits in South China. The Indosinian tectonic movement caused partial melting of some uranium-rich black shale, forming S-type granites, which were also the uranium source for the subsequent uranium mineralization. The tectonic-magmatic thermal events in an extensional setting in South China during the Late Yanshanian Movement provided favorable conditions for the formation of high oxygen fugacity hydrothermal fluids, which resulted in the formation of various types of uranium deposits in South China in Cretaceous. High oxygen fugacity hydrothermal fluids mainly composed of meteoric water can migrate through fissure system and extract U from uranium source rocks by oxidation of U4+ to U6+. The reductive materials related to organic-rich black shale, basic dyke and volcanic degassing are responsible for the precipitation and mineralization of U.
关键词	Uranium Uranium deposits Oxygen fugacity South China Uranium-rich black shale
DOI	10.18654/1000-0569/2020.01.05
收录类别	SCI
语种	英语
WOS研究方向	Geology
WOS类目	Geology
WOS记录号	WOS:000533247400005
出版者	SCIENCE PRESS
引用统计	被引频次：8[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/167455
专题	深海极端环境与生命过程研究中心
通讯作者	Hao XiLuo
作者单位	1.Chinese Acad Sci, Ctr Deep Sea Res, Inst Oceanol, Qingdao 266071, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Qingdao Inst Marina Geol, Key Lab Gas Hydrate, Minist Nat Resources, Qingdao 266071, Peoples R China 4.Pilot Natl Lab Marine Sci & Technol, Lab Marine Mineral Resources, Qingdao 266071, Peoples R China
第一作者单位	中国科学院海洋研究所
推荐引用方式 GB/T 7714	Wang Kun,Deng JiangHong,Hao XiLuo. The geochemical behavior of uranium and mineralization : South China uranium province as an example[J]. ACTA PETROLOGICA SINICA,2020,36(1):35-43.
APA	Wang Kun,Deng JiangHong,&Hao XiLuo.(2020).The geochemical behavior of uranium and mineralization : South China uranium province as an example.ACTA PETROLOGICA SINICA,36(1),35-43.
MLA	Wang Kun,et al."The geochemical behavior of uranium and mineralization : South China uranium province as an example".ACTA PETROLOGICA SINICA 36.1(2020):35-43.

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