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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, Long1,2; Chen, Zhenyu3; Li, Shengrong4; Santosh, M.4; Huang, Guolong5; Tian, Zejin6
2017-12-01
Source PublicationORE GEOLOGY REVIEWS
ISSN0169-1368
Volume91Pages:1040-1065
SubtypeArticle
AbstractThe 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.
KeywordGeochemistry Mineral Chemistry U-bearing And Barren Granites Uranium Mineralization The Zhuguangshan Complex South China
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1016/j.oregeorev.2017.07.017
Funding OrganizationChina 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)
WOS KeywordPLASMA-MASS SPECTROMETRY ; ELECTRON-MICROPROBE ; PB AGE ; CHEMICAL-COMPOSITION ; LASER-ABLATION ; TRACE-ELEMENT ; HF ISOTOPE ; SE CHINA ; SM-ND ; EXPLORATION SIGNIFICANCE
Indexed BySCI
Language英语
Funding OrganizationChina 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)
WOS Research AreaGeology ; Mineralogy ; Mining & Mineral Processing
WOS SubjectGeology ; Mineralogy ; Mining & Mineral Processing
WOS IDWOS:000418978300057
PublisherELSEVIER SCIENCE BV
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/93142
Collection矿产资源研究院重点实验室
Corresponding AuthorChen, Zhenyu
Affiliation1.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
Recommended Citation
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.
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