Mineralization process of the Changjiang uranium orefield in South China: Constraints from pitchblende geochemistry
文献类型：期刊论文
| 作者 | Qi, Jia-Ming2,3,5,6; Xia, Xiao-Ping2; Qiu, Liang4; Liu, Bin1,6; Ling, Hong -Fei1 |
| 刊名 | ORE GEOLOGY REVIEWS
 |
| 出版日期 | 2024-06-01 |
| 卷号 | 169页码:17 |
| 关键词 | Pitchblende Elemental composition Fluid evolution Micro-analysis Changjiang uranium orefield Mianhuakeng deposit South China |
| ISSN号 | 0169-1368 |
| DOI | 10.1016/j.oregeorev.2024.106067 |
| 英文摘要 | The Changjiang uranium (U) orefield in northern Guangdong (South China) contains several important graniterelated uranium deposits, including the Mianhuakeng deposit. The hydrothermal evolution and mineralization mechanism of the deposit remain unclear, and hence in this study we analyzed the mineral compositional variations of pitchblende from different elevation (-300 to -50 m) in the orebody at Mianhuakeng deposit. The results indicate that with decreasing depth, the hydrothermal mineral assemblage changes from a reducing one (pitchblende, pyrite, and chlorite) to a moderately oxidizing one (pitchblende, coffinite, hematite, and goethite). The contents of U, Sr, & sum;REE, U/Th, and LREE/HREE ratios in the pitchblende decrease (whereas the Cu-Pb-ZnNi-Co-Sc-Rb contents increase) progressively with decreasing depth. Also, Ce anomaly (Ce/Ce*) changes from positive to negative, and Eu anomaly (Eu/Eu*) becomes more negative with decreasing depth. We interpreted such vertical variations to be caused by the ascent of deep, mid-to-high temperature, highly-oxidizing oreforming fluid, which was reduced by early-stage reducing minerals in the wallrock, a process that also formed the mineralization at Changjiang. In addition, the pitchblende REE distribution patterns and Eu/Eu* at depth (-300 m) resemble those of the Zhuguang pluton, indicating that the ore-forming materials were originated from the Ubearing granite wallrocks. Therefore, the Ce/Ce* and Eu/Eu* variations of pitchblende can be used to guide deep uranium ore exploration. |
| WOS研究方向 | Geology ; Mineralogy ; Mining & Mineral Processing |
| 语种 | 英语 |
| WOS记录号 | WOS:001265733900001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/78303]  |
| 专题 | 同位素地球化学国家重点实验室 |
| 通讯作者 | Xia, Xiao-Ping |
| 作者单位 | 1.Nanjing Univ, Sch Earth Sci & Engn, Nanjing 210023, Peoples R China 2.Yangtze Univ, Coll Resources & Environm, Hubei Key Lab Petr Geochem & Environm, Wuhan 430100, Peoples R China 3.Chinese Acad Sci, State Key Lab Isotope Geochem, Guangzhou Inst Geochem, Guangzhou 510640, Peoples R China 4.China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Beijing 100083, Peoples R China 5.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China 6.China Natl Nucl Corp, Res Inst 290, Shaoguan 512029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Qi, Jia-Ming,Xia, Xiao-Ping,Qiu, Liang,et al. Mineralization process of the Changjiang uranium orefield in South China: Constraints from pitchblende geochemistry[J]. ORE GEOLOGY REVIEWS,2024,169:17. |
| APA | Qi, Jia-Ming,Xia, Xiao-Ping,Qiu, Liang,Liu, Bin,&Ling, Hong -Fei.(2024).Mineralization process of the Changjiang uranium orefield in South China: Constraints from pitchblende geochemistry.ORE GEOLOGY REVIEWS,169,17. |
| MLA | Qi, Jia-Ming,et al."Mineralization process of the Changjiang uranium orefield in South China: Constraints from pitchblende geochemistry".ORE GEOLOGY REVIEWS 169(2024):17. |
入库方式： OAI收割
来源：广州地球化学研究所
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