Release and re-enrichment of invisible gold in arsenian pyrite promoted by coupled dissolution-reprecipitation reactions
文献类型：期刊论文
| 作者 | Yang, Lin9; Wang, Qingfei2,7,8,9; Fougerouse, Denis5,6; Xian, Haiyang4; Li, Huajian9; Wang, Ruixue3; Rickard, William D. A.5,6; Groves, David I.1,9; Deng, Jun2,7,9 |
| 刊名 | COMMUNICATIONS EARTH & ENVIRONMENT
 |
| 出版日期 | 2024-05-08 |
| 卷号 | 5期号:1页码:8 |
| DOI | 10.1038/s43247-024-01408-5 |
| 英文摘要 | The mechanisms responsible for invisible gold enrichment driven by coupled dissolution-reprecipitation reaction (CDR) are debated. Here we report the micro- to nano-scale textures of arsenian pyrite in a high-grade (>10 g/t) gold ore from the Chang'an deposit to trace the gold enrichment process. Our study records a CDR-driven evolution of mineral growth from an As-rich, Au-poor pyrite core, with numerous fine arsenopyrite inclusions, to an inclusion-free, As-Au-rich oscillatory pyrite rim. The reaction occurred at similar to 260 degrees C under 4.7 to 5.8 pH and -36.6 to -32.9 logf(O2) conditions. The elevated As but depleted S contents in the pyrite core indicate a combined elevation of S fugacity and solubility of Au. The coprecipitation of arsenopyrite inclusions in the core caused a depletion of S fugacity to -13.8 similar to -11.7, triggering Au enrichment in the rim. This non-unique process has the potential to explain the upgrade of invisible Au in arsenian sulfides, worldwide. |
| WOS研究方向 | Environmental Sciences & Ecology ; Geology ; Meteorology & Atmospheric Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:001216282800004 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/77034]  |
| 专题 | 中国科学院矿物学与成矿学重点实验室 |
| 通讯作者 | Wang, Qingfei; Deng, Jun |
| 作者单位 | 1.Univ Western Australia, Ctr Explorat Targeting, Crawley, WA 6009, Australia 2.Shandong Gold Grp Co Ltd, Geol Res Inst, Jinan 250013, Peoples R China 3.CSIRO, Australian Resources Res Ctr, Mineral Resources, Kensington, WA 6152, Australia 4.Chinese Acad Sci, Guangzhou Inst Geochem, CAS Key Lab Mineral & Metallogeny, Guangdong Prov Key Lab Mineral Phys & Mat, Guangzhou 510640, Peoples R China 5.Curtin Univ, John de Laeter Ctr, Perth, WA, Australia 6.Curtin Univ, Sch Earth & Planetary Sci, Perth, WA, Australia 7.China Univ Geosci Beijing, Frontiers Sci Ctr Deep Time Digital Earth, Beijing 100083, Peoples R China 8.East China Univ Technol, Jiangxi Prov Key Lab Genesis & Prospect Strateg Mi, Nanchang 330013, Jiangxi, Peoples R China 9.China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Beijing 100083, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yang, Lin,Wang, Qingfei,Fougerouse, Denis,et al. Release and re-enrichment of invisible gold in arsenian pyrite promoted by coupled dissolution-reprecipitation reactions[J]. COMMUNICATIONS EARTH & ENVIRONMENT,2024,5(1):8. |
| APA | Yang, Lin.,Wang, Qingfei.,Fougerouse, Denis.,Xian, Haiyang.,Li, Huajian.,...&Deng, Jun.(2024).Release and re-enrichment of invisible gold in arsenian pyrite promoted by coupled dissolution-reprecipitation reactions.COMMUNICATIONS EARTH & ENVIRONMENT,5(1),8. |
| MLA | Yang, Lin,et al."Release and re-enrichment of invisible gold in arsenian pyrite promoted by coupled dissolution-reprecipitation reactions".COMMUNICATIONS EARTH & ENVIRONMENT 5.1(2024):8. |
入库方式： OAI收割
来源：广州地球化学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。