Fingerprinting hydrothermal fluids in porphyry Cu deposits using K and Mg isotopes
文献类型：期刊论文
| 作者 | Li, Weiqiang2; Zhao, Shugao2; Wang, Xiaomin2; Li, Shilei2; Wang, Guoguang2; Yang, Tao2; Jin, Zhangdong1 |
| 刊名 | SCIENCE CHINA-EARTH SCIENCES
 |
| 出版日期 | 2020 |
| 卷号 | 63期号:1页码:108-120 |
| ISSN号 | 1674-7313 |
| DOI | 10.1007/s11430-018-9387-2 |
| 通讯作者 | Li, Weiqiang(liweiqiang@nju.edu.cn) |
| 英文摘要 | In this study, we performed an integrated investigation of K and Mg isotopes in hydrothermally altered rocks from the giant Dexing porphyry Cu deposit in China. Both the altered porphyry intrusion and the surrounding wall rocks exhibit large variations in K and Mg isotope compositions, with delta K-41 values ranging between -1.0296 parts per thousand and 0.38 parts per thousand, and delta Mg-26 values ranging between -0.49 parts per thousand and 0.32 parts per thousand. The delta K-41 and delta Mg-26 values of the majority of altered samples are higher than the isotopic baseline values for upper continental crust. We attribute the general increase in delta K-41 and delta Mg-26 in altered rocks to hydrothermal alteration, which caused preferential incorporation of heavy K and Mg isotopes in alteration products, particularly phyllosilicates. However, a few altered samples show anomalously low delta K-41 and delta Mg-26 values. The delta K-41 and delta Mg-26 values do not correlate with K and Mg concentrations, or mineralogy of altered samples. The variable K-Mg isotope data likely reflect fluids of different physical-chemical properties, or different isotopic compositions. Based on the combined K-Mg isotope data, at least three groups of hydrothermal fluids are distinguished from the Dexing porphyry deposit. Therefore, K-Mg isotopes are potentially a novel tracer for fingerprinting fluids in complex hydrothermal systems. |
| WOS关键词 | MC-ICP-MS ; COPPER-DEPOSIT ; MO DEPOSIT ; POTASSIUM ; FRACTIONATION ; CONSTRAINTS ; EARTH |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000511955300008 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.ieecas.cn/handle/361006/12777]  |
| 专题 | 地球环境研究所_加速器质谱中心 |
| 通讯作者 | Li, Weiqiang |
| 作者单位 | 1.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China 2.Nanjing Univ, Sch Earth Sci & Engn, State Key Lab Mineral Deposits Res, Nanjing 210046, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Weiqiang,Zhao, Shugao,Wang, Xiaomin,et al. Fingerprinting hydrothermal fluids in porphyry Cu deposits using K and Mg isotopes[J]. SCIENCE CHINA-EARTH SCIENCES,2020,63(1):108-120. |
| APA | Li, Weiqiang.,Zhao, Shugao.,Wang, Xiaomin.,Li, Shilei.,Wang, Guoguang.,...&Jin, Zhangdong.(2020).Fingerprinting hydrothermal fluids in porphyry Cu deposits using K and Mg isotopes.SCIENCE CHINA-EARTH SCIENCES,63(1),108-120. |
| MLA | Li, Weiqiang,et al."Fingerprinting hydrothermal fluids in porphyry Cu deposits using K and Mg isotopes".SCIENCE CHINA-EARTH SCIENCES 63.1(2020):108-120. |
入库方式： OAI收割
来源：地球环境研究所
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