Mineralogy and geochemistry of a Late Permian coal in the Dafang Coalfield, Guizhou, China: influence from siliceous and iron-rich calcic hydrothermal fluids
文献类型：SCI/SSCI论文
| 作者 | Dai S. F. ; Chou C. L. ; Yue M. ; Luo K. L. ; Ren D. Y. |
| 发表日期 | 2005 |
| 关键词 | coal vein ankerite vein quartz low-temperature hydrothermal fluids trace elements Guizhou China platinum-group elements british-columbia southwest china trace-elements zhijin coalfield tulameen coal province basin mineralization speciation |
| 英文摘要 | This paper describes the influence of siliceous and iron-rich calcic low-temperature hydrothermal fluids (LTHF) on the mineralogy and geochemistry of the Late Permian No. I I Coal (anthracitic, R-r = 2.85%) in the Dafang Coalfield in northwestern Guizhou Province, China. The No. I I Coal has high contents of vein ankerite (10.2 vol.%) and vein quartz (11.4 vol.%), with formation temperatures of 85 and 180 degreesC, respectively, indicating that vein ankerite and vein quartz were derived from low-temperature calcic and siliceous hydrothermal fluids in two epigenetic episodes. The vein quartz appears to have formed earlier than vein ankerite did, and at least three distinct stages of ankerite formation with different Ca/Sr and Fe/Mn ratios were observed. The two types of mineral veins are sources of different suites of major and trace metals. Scanning electron microscope and sequential extraction studies show that, in addition to Fe, Mg, and Ca, vein ankerite is the dominant source of Mn, Cu, Ni, Pb, and Zn in the coal, and the contents of these five elements are as high as 0.09% and 74.0, 33.6, 185, and 289 mug/g, respectively. In contrast, vein quartz is the main carrier mineral for platinum-group elements (PGEs) Pd, Pt, and Ir in the coal, and the contents of Pd, Pt, and Ir are 1.57, 0.15, and 0.007 mug/g, respectively. Sequential extraction showed a high PGE content in the silicate fraction, up to 10.4 mug/g Pd, 1.23 mug/g Pt, and 0.05 mug/g Ir, respectively. It is concluded that the formation of ankerite and quartz and the anomalous enrichment of trace elements in the No. I I Coal in the Dafang Coalfield, Guizhou, result from the influx of calcic and siliceous low-temperature hydrothermal fluids. (C) 2004 Elsevier B.V. All rights reserved. |
| 出处 | International Journal of Coal Geology |
| 卷 | 61 |
| 期 | 3-4 |
| 页 | 241-258 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 0166-5162 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/24160]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 |
| 推荐引用方式 GB/T 7714 | Dai S. F.,Chou C. L.,Yue M.,et al. Mineralogy and geochemistry of a Late Permian coal in the Dafang Coalfield, Guizhou, China: influence from siliceous and iron-rich calcic hydrothermal fluids. 2005. |
入库方式： OAI收割
来源：地理科学与资源研究所
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。