Isotope geochronology, geochemistry, and mineral chemistry of the U-bearing and barren granites from the Zhuguangshan complex, South China: Implications for petrogenesis and uranium mineralization

doi:10.1016/j.oregeorev.2017.07.017

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 中国科学院矿产资源研究重点实验室

	Isotope geochronology, geochemistry, and mineral chemistry of the U-bearing and barren granites from the Zhuguangshan complex, South China: Implications for petrogenesis and uranium mineralization
	Zhang, Long 1,2; Chen, Zhenyu 3; Li, Shengrong 4; Santosh, M.4; Huang, Guolong 5; Tian, Zejin 6
刊名	ORE GEOLOGY REVIEWS
	2017-12-01
卷号	91 页码:1040-1065
关键词	Geochemistry Mineral Chemistry U-bearing And Barren Granites Uranium Mineralization The Zhuguangshan Complex South China
ISSN号	0169-1368
DOI	10.1016/j.oregeorev.2017.07.017
文献子类	Article
英文摘要	The Zhuguangshan complex carries some of the most important granite-hosted uranium deposits in South China. Here we investigate the Changjiang and Jiufeng granites which represent typical U-bearing and barren granites in the complex, using zircon U-Pb ages, whole-rock geochemistry, Sr-Nd isotopic and zircon Hf isotopic data, and mineral chemistry, to constrain the petrogenesis and uranium mineralization. LA-ICP-MS zircon U-Pb dating shows that both the Changjiang and Jiufeng granites were emplaced ca. 160 Ma. These rocks show high silica, weakly to strongly peraluminous compositions, enrichment in Rb, Th, and U, and depletion in Ba, Nb, Sr, P, and Ti. These features coupled with the high initial Sr-87/Sr-86 ratios, negative epsilon Nd(t) values and epsilon Hf(t) values, and the Paleoproterozoic two stage model ages of these two granites suggest that the two granites belong to S-type granites, and the parental magmas of the two granites were derived from the Paleoproterozoic metasedimentary rocks. However, the granitoids show different mineralogical characteristics. The biotite in the Changjiang granite belongs to siderophyllite, marking higher degree of chloritization, whereas the biotite in the Jiufeng granite is ferribiotite, characterized by only slight chloritization. Compared with the Jiufeng granite, the biotite in the Changjiang granite has lower crystallization temperature and oxygen fugacity, but higher F content, and the uraninite has higher UO2 content but lower ThO2 content, and stronger corrosion. The chemical ages of uraninites from both granites are (within error) consistent with the zircon U-Pb ages and are considered to represent the emplacement ages of granites. Chemical ages of pitchblende in the Changjiang granite yield 118 +/- 8 Ma, 87 +/- 4 Ma, and 68 +/- 6 Ma, representing multiple episodes of hydrothermal events that are responsible for the precipitation of U ores in the Changjiang uranium ore field. Our study suggests that the degree of magma differentiation and physicochemical conditions of the magmatic-hydrothermal system are the key factors that control the different U contents of these two granites. The mineralogical characteristics of uraninite and biotite can be used to distinguish between U-bearing and barren granites, and serve as a potential tool for prospecting granite-hosted uranium deposits.
WOS关键词	PLASMA-MASS SPECTROMETRY ; ELECTRON-MICROPROBE ; PB AGE ; CHEMICAL-COMPOSITION ; LASER-ABLATION ; TRACE-ELEMENT ; HF ISOTOPE ; SE CHINA ; SM-ND ; EXPLORATION SIGNIFICANCE
WOS研究方向	Geology ; Mineralogy ; Mining & Mineral Processing
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000418978300057
资助机构	China Geological Survey(12120113090500) ; China Geological Survey(12120113090500) ; China Geological Survey(12120113090500) ; China Geological Survey(12120113090500) ; China Geological Survey(12120113090500) ; China Geological Survey(12120113090500) ; China Geological Survey(12120113090500) ; China Geological Survey(12120113090500)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/93142]
专题	地质与地球物理研究所_中国科学院矿产资源研究重点实验室
通讯作者	Chen, Zhenyu
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Geol Sci, Inst Mineral Resources, Key Lab Metallogeny & Mineral Assessment, Beijing 100037, Peoples R China 4.China Univ Geosci, Sch Earth Sci & Resources, Beijing 100083, Peoples R China 5.China Natl Nucl Corp, Res Inst 290, Shaoguan 512026, Peoples R China 6.Geol Publishing House, Beijing 100083, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Long,Chen, Zhenyu,Li, Shengrong,et al. Isotope geochronology, geochemistry, and mineral chemistry of the U-bearing and barren granites from the Zhuguangshan complex, South China: Implications for petrogenesis and uranium mineralization[J]. ORE GEOLOGY REVIEWS,2017,91:1040-1065.
APA	Zhang, Long,Chen, Zhenyu,Li, Shengrong,Santosh, M.,Huang, Guolong,&Tian, Zejin.(2017).Isotope geochronology, geochemistry, and mineral chemistry of the U-bearing and barren granites from the Zhuguangshan complex, South China: Implications for petrogenesis and uranium mineralization.ORE GEOLOGY REVIEWS,91,1040-1065.
MLA	Zhang, Long,et al."Isotope geochronology, geochemistry, and mineral chemistry of the U-bearing and barren granites from the Zhuguangshan complex, South China: Implications for petrogenesis and uranium mineralization".ORE GEOLOGY REVIEWS 91(2017):1040-1065.