Knowledge Management System Of Institute of Oceanology, Chinese Academy of Sciences
| Genesis of Chaoshan skarn Au deposit, Tongling, eastern China: Insights from mineral geochemistry | |
Xie, Jiancheng1; Zhang, Xin1; Huang, Shan1; Ge, Likai1; Li, Quanzhong1; Sun, Weidong2,3,4
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| 2022-10-01 | |
| 发表期刊 | JOURNAL OF GEOCHEMICAL EXPLORATION
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| ISSN | 0375-6742 |
| 卷号 | 241页码:22 |
| 通讯作者 | Xie, Jiancheng([email protected]) |
| 摘要 | Skarn Au deposits are particularly developed along Middle and Lower Yangtze River region, eastern China, but gold behavior and genesis of the skarn Au deposits remain unclear. Whole-rock geochemical, sulfur isotopic and in-situ mineralogical data from the mineralized alteration stages of Chaoshan skarn Au deposit in Tongling re-gion are systemically investigated to reveal Au distribution and precipitation, and useful information for ore -forming process. The altered rocks and ores in the Chaoshan deposit have total REE contents of 7.81-226 ppm and show LREE enrichment patterns with weak negative to positive Eu (delta Eu = 0.71-2.24) anomalies. Electron probe microanalysis results indicate that garnet and pyroxene of the Chaoshan deposit are grossular-andradite and diopside-hedenbergite series, respectively. In situ elemental compositions of the euhedral pyrite analyzed show that invisible Au is mainly of lattice-bound Au+ in As-bearing pyrite. The studied pyrite samples also have high Co/Ni (mainly >1) and Se/Tl (>10) ratios, highly variable Pb and As contents, low Se content (<5.00 ppm), low Tl/Pb and Sb/Pb ratios, and relatively consistent sulfur isotopic compositions (5.0-8.3 parts per thousand). The distinctly geochemical characteristics indicate that the Chaoshan skarn Au mineralization was likely derived from a magmatic-hydrothermal system. A comprehensive discriminant analysis shows that the Au precipitation and enrichment of the Chaoshan deposit are a result of boiling-induced trace element fractionation resulted from fluid boiling during the skarn formation process. |
| 关键词 | Skarn Au deposit Genesis Mineral geochemistry Chaoshan deposit Tongling region |
| DOI | 10.1016/j.gexplo.2022.107055 |
| 收录类别 | SCI |
| 语种 | 英语 |
| 资助项目 | National Natural Science Foundation of China[42030801]; National Natural Science Foundation of China[41373045]; National Key Research and Development Program of China[2016YFC0600404]; State Key Laboratory of Isotope Geochemistry at the Guangzhou Institute of Geochemistry |
| WOS研究方向 | Geochemistry & Geophysics |
| WOS类目 | Geochemistry & Geophysics |
| WOS记录号 | WOS:000892125200002 |
| 出版者 | ELSEVIER |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.qdio.ac.cn/handle/337002/181001 |
| 专题 | 深海极端环境与生命过程研究中心 |
| 通讯作者 | Xie, Jiancheng |
| 作者单位 | 1.Hefei Univ Technol, Sch Resources & Environm Engn, Hefei 230009, Peoples R China 2.Chinese Acad Sci, Inst Oceanol, Ctr Deep Sea Res, Ctr Ocean Mega Sci, Qingdao 266071, Peoples R China 3.Qingdao Natl Lab Marine Sci & Technol, Deep Sea Multidisciplinary Res Ctr, Qingdao 266237, Peoples R China 4.Univ Chinese Acad Sci, Sch Marine Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xie, Jiancheng,Zhang, Xin,Huang, Shan,et al. Genesis of Chaoshan skarn Au deposit, Tongling, eastern China: Insights from mineral geochemistry[J]. JOURNAL OF GEOCHEMICAL EXPLORATION,2022,241:22. |
| APA | Xie, Jiancheng,Zhang, Xin,Huang, Shan,Ge, Likai,Li, Quanzhong,&Sun, Weidong.(2022).Genesis of Chaoshan skarn Au deposit, Tongling, eastern China: Insights from mineral geochemistry.JOURNAL OF GEOCHEMICAL EXPLORATION,241,22. |
| MLA | Xie, Jiancheng,et al."Genesis of Chaoshan skarn Au deposit, Tongling, eastern China: Insights from mineral geochemistry".JOURNAL OF GEOCHEMICAL EXPLORATION 241(2022):22. |
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