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Zircon U-Pb geochronology and geochemistry of granites in the Zhuguangshan complex, South China: Implications for uranium mineralization
Zhang, Long1,2,3; Chen, Zhenyu4; Li, Xiaofeng1,2,3; Li, Shengrong5,6; Santosh, M.6,7; Huang, Guolong8
2018-05-01
发表期刊LITHOS
ISSN0024-4937
卷号308页码:19-33
摘要The Zhuguangshan complex, composed of Caledonian, lndosinian, and Yanshanian granites, and Cretaceous mafic dykes, is one of the most important granite-hosted uranium producers in South China. Here we present LA-ICP-MS zircon U-Pb and hornblende Ar-40/Ar-39 geochronology and whole-rock and biotite geochemistry for the granites in this complex to evaluate the magmatism and its constraints on uranium mineralization. Samples collected from the Fuxi, Youdong, Longhuashan, Chikeng, Qiling, and Sanjiangkou intrusions yield zircon weighted Pb-206/U-238 ages of 426.7 +/- 5.4 Ma, 226.4 +/- 3.5 Ma, 225.0 +/- 2.7 Ma, 152.2 +/- 3.0 Ma, 153.9 +/- 2.1 Ma, and 155.2 +/- 2.1 Ma, respectively. A new Ar-Ar dating of the hornblende of the diabase from the Changjiang uranium ore field yields a plateau age of 145.1 +/- 1.5 Ma. These results coupled with published geochronological data indicate that six major magmatic events occurred in the study area at 420-435 Ma, 225-240 Ma, 150-165 Ma, similar to 140 Ma, similar to 105 Ma, and similar to 90 Ma. Both U-bearing and barren granites occur in this complex, and they display differences in whole-rock and biotite geochemistry. The barren granites show higher Al2O3, CaO, TFMM, Rb, Zr, Ba, SI, Mg#, (La/Yb)(N), and Eu/Eu*, but lower SiO2, ALK, Rb, DI, Rb/Sr, and TiO2/MgO than those of the U-bearing granites. Biotites in the U-bearing granites are close to the Fe-rich siderophyllite-annite end member with Fe/(Fe + Mg) ratios higher than 0.66, whereas those in the barren granites are relatively close to the Mg-rich eastonite-phlogopite end member with Fe/(Fe + Mg) ratios <0.66. The U-bearing granites were mainly derived from the partial melting of pelitic sedimentary source, whereas the psammitic source generated the barren granites. In addition, the barren granites show higher TFMM, Ba, and Eu/Eu* but lower SiO2, Rb/Sr and Al2O3/TiO2 ratios with higher zircon saturation temperatures relative to the U-bearing granites. These results indicate that the geochemical compositions of the U-bearing and barren granites are dictated not only by the compositions of source rocks but also the physicochemical conditions of partial melting. Our study suggests that these two factors are also the major factors that control uranium ore potential of the granites in the Zhuguangshan complex. The geochemical variations of U-bearing and barren granites can serve as a potential detector for granite-hosted uranium deposits. (C) 2018 Elsevier B.V. All rights reserved.
关键词Geochemistry U-bearing and barren granites Geochemical diversity Uranium mineralization The Zhuguangshan complex
DOI10.1016/j.lithos.2018.02.029
资助者National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Geological Survey ; China Geological Survey ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Geological Survey ; China Geological Survey ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Geological Survey ; China Geological Survey ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Geological Survey ; China Geological Survey
关键词[WOS]S-TYPE GRANITES ; TRIASSIC GRANITES ; BARREN GRANITES ; TRACE-ELEMENTS ; NANLING RANGE ; PETROGENETIC DISCRIMINATION ; WANYANGSHAN-ZHUGUANGSHAN ; EXPLORATION SIGNIFICANCE ; ISOTOPIC CONSTRAINTS ; MESOZOIC GRANITOIDS
语种英语
资助项目National Natural Science Foundation of China[41741010] ; China Geological Survey[12120113090500]
资助者National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Geological Survey ; China Geological Survey ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Geological Survey ; China Geological Survey ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Geological Survey ; China Geological Survey ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Geological Survey ; China Geological Survey
WOS研究方向Geochemistry & Geophysics ; Mineralogy
WOS类目Geochemistry & Geophysics ; Mineralogy
WOS记录号WOS:000446791000002
出版者ELSEVIER SCIENCE BV
引用统计
文献类型期刊论文
条目标识符http://ir.iggcas.ac.cn/handle/132A11/89185
专题矿产资源研究院重点实验室
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.Chinese Acad Sci, Inst Earth Sci, Beijing 100029, Peoples R China
3.Univ Chinese Acad Sci, Coll Earth Sci, Beijing 100049, Peoples R China
4.Chinese Acad Geol Sci, Inst Mineral Resources, MLR Key Lab Metallogeny & Mineral Assessment, Beijing 100037, Peoples R China
5.China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Beijing 100083, Peoples R China
6.China Univ Geosci Beijing, Sch Earth Sci & Resources, Beijing 100083, Peoples R China
7.Univ Adelaide, Dept Earth Sci, Adelaide, SA 5005, Australia
8.China Natl Nucl Corp, Res Inst 290, Shaoguan 512026, Guangdong, Peoples R China
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GB/T 7714
Zhang, Long,Chen, Zhenyu,Li, Xiaofeng,et al. Zircon U-Pb geochronology and geochemistry of granites in the Zhuguangshan complex, South China: Implications for uranium mineralization[J]. LITHOS,2018,308:19-33.
APA Zhang, Long,Chen, Zhenyu,Li, Xiaofeng,Li, Shengrong,Santosh, M.,&Huang, Guolong.(2018).Zircon U-Pb geochronology and geochemistry of granites in the Zhuguangshan complex, South China: Implications for uranium mineralization.LITHOS,308,19-33.
MLA Zhang, Long,et al."Zircon U-Pb geochronology and geochemistry of granites in the Zhuguangshan complex, South China: Implications for uranium mineralization".LITHOS 308(2018):19-33.
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