Ore-forming fluid characteristics and ages of the Xinan Cu-Mo deposit at Zijinshan orefield, SE China: New insights for metallogenic mechanism and exploration
文献类型：期刊论文
| 作者 | Wang, Xuena2,3; Wu, Chao1,2; Xiao, Bing1,2; Xu, Chao2; Yu, Xiaoliang4,5; Lai, Xiaodan6 |
| 刊名 | ORE GEOLOGY REVIEWS
 |
| 出版日期 | 2024-05-01 |
| 卷号 | 168页码:17 |
| 关键词 | Zijinshan orefield Xinan Cu-Mo deposit Geochronology Fluid inclusion Mineralization mechanism |
| ISSN号 | 0169-1368 |
| DOI | 10.1016/j.oregeorev.2024.106061 |
| 英文摘要 | The Xinan deposit, a newly discovered porphyry Cu-Mo deposit in the Zijinshan orefield, Fujian Province, exhibits distinct alteration and porphyry mineralization stages, including the potassic, propylitic, and phyllic alteration stages. The phyllic stage is further divided into molybdenite, chalcopyrite, and pyrite sub-stages. Molybdenite Re-Os model age (108.3 +/- 1.1 Ma) and concomitant sericite Ar-40/Ar-39 plateau age (109.0 +/- 6.0 Ma) indicate that the Xinan Cu-Mo deposit was formed at 109 similar to 108 Ma. Four types of fluid inclusions have been identified at the Xinan deposit, including vapor-rich, liquid-rich, and opaque daughter mineral-bearing subtypes with minor transparent daughter mineral-bearing subtypes. Fluid inclusion microthermometry measurements reveal that the potassic alteration stage exhibits homogenization temperatures of 375-475 degrees C and salinities range of 4-20 wt% NaCl eqv., suggesting slight fluid boiling. Chlorite geothermometer suggests temperatures of the propylitic alteration stage range from 261 to 336 degrees C, averaging at 303 degrees C. The molybdenite, chalcopyrite, and pyrite sub-stages have homogenization temperatures of 325-400 degrees C, 325-350 degrees C, and 300-350 degrees C, respectively, with corresponding salinities of 2-10 wt% NaCl eqv., 4-8 wt% NaCl eqv., and 2-4 wt% NaCl eqv.. The Laser Raman spectroscopy results show that the fluid inclusions in the Xinan deposit consist of H2O with minor CO2, hematite, chalcopyrite, and halite. The evolution of the ore-forming fluids in the Xinan porphyry Cu-Mo deposit is characterized by a transition from high-temperature, low- to moderate-salinity, oxidized, and CO2-bearing conditions during the potassic alteration stage, to moderate- to high-temperature and low-salinity conditions during the propylitic alteration stage. The subsequent phyllic alteration stage, which overprints on the potassic and partial propylitic alteration stages, is marked by moderate- to high-temperature, low-salinity, and low-oxygen fugacity environments. The primary mechanisms driving mineralization in the Xinan porphyry Cu-Mo deposit are thus identified as the reduction in temperature and oxygen fugacity, coupled with CO2 escape. In contrast to the Luoboling-Jintonghu porphyry Cu-Mo deposit, the ore-forming fluid of the Xinan deposit is characterized by lower temperatures, salinity, and CO2 contents, and reduced fluid boiling. This suggests a relatively subdued porphyry-type mineralization. The lack of a distinct potassic alteration zone in the Xinan Cu-Mo deposit suggests the potential existence of a deeper, higher temperature and salinity porphyry mineralization center beneath this deposit. |
| WOS研究方向 | Geology ; Mineralogy ; Mining & Mineral Processing |
| 语种 | 英语 |
| WOS记录号 | WOS:001240253600001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/78480]  |
| 专题 | 中国科学院矿物学与成矿学重点实验室 |
| 通讯作者 | Wu, Chao |
| 作者单位 | 1.Guangdong Prov Key Lab Mineral Phys & Mat, Guangzhou 510640, Peoples R China 2.Chinese Acad Sci, Key Lab Mineral & Metallogeny, Guangzhou Inst Geochem, Guangzhou 510640, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Geol Survey Bur Qinghai Prov, Xining 810001, Peoples R China 5.Minist Nat Resources, Technol Innovat Ctr Explorat & Exploitat Strateg M, Xining 810001, Peoples R China 6.Zijin Min Grp Co Ltd, Longyan 364200, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Xuena,Wu, Chao,Xiao, Bing,et al. Ore-forming fluid characteristics and ages of the Xinan Cu-Mo deposit at Zijinshan orefield, SE China: New insights for metallogenic mechanism and exploration[J]. ORE GEOLOGY REVIEWS,2024,168:17. |
| APA | Wang, Xuena,Wu, Chao,Xiao, Bing,Xu, Chao,Yu, Xiaoliang,&Lai, Xiaodan.(2024).Ore-forming fluid characteristics and ages of the Xinan Cu-Mo deposit at Zijinshan orefield, SE China: New insights for metallogenic mechanism and exploration.ORE GEOLOGY REVIEWS,168,17. |
| MLA | Wang, Xuena,et al."Ore-forming fluid characteristics and ages of the Xinan Cu-Mo deposit at Zijinshan orefield, SE China: New insights for metallogenic mechanism and exploration".ORE GEOLOGY REVIEWS 168(2024):17. |
入库方式： OAI收割
来源：广州地球化学研究所
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