Incorporation mechanism of structurally bound gold in pyrite: Insights from an integrated chemical and atomic-scale microstructural study
文献类型:期刊论文
作者 | Meng, Lei1,2; Zhu, Sanyuan3; Li, Xiaochun4; Chen, Wei Terry5; Xian, Haiyang1; Gao, Xinyu6; Zhao, Taiping1,2 |
刊名 | AMERICAN MINERALOGIST |
出版日期 | 2022-04-26 |
卷号 | 107期号:4页码:603-613 |
ISSN号 | 0003-004X |
关键词 | Arsenian pyrite mu-XANES spectroscopy Z-contrast HAADF-STEM image Au incorporation mechanism |
DOI | 10.2138/am-2021-7812 |
英文摘要 | Pyrite is one of the most important carriers for Au in hydrothermal deposits, but the incorporation mechanism of structurally boundAu has long been a matter of debate. This is due to a poor understanding of the chemical state and coordination environments of Au in the pyrite structure. Arsenian pyrite is the dominant Au-hosting mineral from the Shanggong Au deposit (130 t Au) in the southern margin of the North China Craton. Our EPMA and LA-ICP-MS results show that the arsenian pyrite has remarkably high Au (0.05-0.78 wt%) and As (0.39-4.60 wt%) contents. Au is negatively correlated with Fe but positively correlated with As. Z-contrast HAADF-STEM imaging reveals that Au atoms sit at the Fe atom sites in the arsenian pyrite structure. Our mu-XANES results and previously reported data suggest that Au and As in arsenian pyrite are predominant of chemically bound Au+ and As- , respectively. We thus propose that Au+ and As- are both structurally bound and sit at the Fe and S atom sites of pyrite, respectively. As may not be necessary but favorable for the incorporation of structurally bound Au in pyrite. These results have significant implications for understanding the enrichment mechanism of Au from ore-forming fluids with low-Au and low-As concentrations into arsenian pyrite and for revealing the role of As in Au mineralization of hydrothermal deposits. |
WOS关键词 | BEARING ARSENIAN PYRITE ; LA-ICP-MS ; INVISIBLE GOLD ; DEPOSIT ; GEOCHEMISTRY ; SPECIATION ; AU ; MINERALIZATION ; NANOSTRUCTURE ; MARCASITE |
资助项目 | National Key Research and Development Program of China[2016YFC0600106] ; National Key Research and Development Program of China[2016YFC0600408] ; [2018-SSRF-PT-005554] |
WOS研究方向 | Geochemistry & Geophysics ; Mineralogy |
语种 | 英语 |
出版者 | MINERALOGICAL SOC AMER |
WOS记录号 | WOS:000773853500005 |
资助机构 | National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China |
源URL | [http://ir.iggcas.ac.cn/handle/132A11/105058] |
专题 | 地质与地球物理研究所_中国科学院矿产资源研究重点实验室 |
通讯作者 | Zhao, Taiping |
作者单位 | 1.Chinese Acad Sci, Guangzhou Inst Geochem, Key Lab Mineral & Met, Guangzhou 510640, Peoples R China 2.CAS Ctr Excellence Deep Earth Sci, Guangzhou 510640, Peoples R China 3.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Organ Geochem, Guangzhou 510640, Peoples R China 4.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China 5.Chinese Acad Sci, Inst Geochem, State Key Lab Ore Deposit Geochem, Guiyang 550002, Peoples R China 6.Guangdong Polytech Water Resources & Elect Engn, Guangzhou 510635, Peoples R China |
推荐引用方式 GB/T 7714 | Meng, Lei,Zhu, Sanyuan,Li, Xiaochun,et al. Incorporation mechanism of structurally bound gold in pyrite: Insights from an integrated chemical and atomic-scale microstructural study[J]. AMERICAN MINERALOGIST,2022,107(4):603-613. |
APA | Meng, Lei.,Zhu, Sanyuan.,Li, Xiaochun.,Chen, Wei Terry.,Xian, Haiyang.,...&Zhao, Taiping.(2022).Incorporation mechanism of structurally bound gold in pyrite: Insights from an integrated chemical and atomic-scale microstructural study.AMERICAN MINERALOGIST,107(4),603-613. |
MLA | Meng, Lei,et al."Incorporation mechanism of structurally bound gold in pyrite: Insights from an integrated chemical and atomic-scale microstructural study".AMERICAN MINERALOGIST 107.4(2022):603-613. |
入库方式: OAI收割
来源:地质与地球物理研究所
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