Ore-forming fluids of the Anjiayingzi gold deposit in Chifeng region, Inner Mongolia.
文献类型：期刊论文
| 作者 | Li, YG; Zhai, MG; Miao, LC; Xue, LW; Zhu, JW; Guan, H |
| 刊名 | ACTA PETROLOGICA SINICA
 |
| 出版日期 | 2004-07-01 |
| 卷号 | 20期号:4页码:961-968 |
| 关键词 | Fluid Inclusion Mineralization Anjiayingzi Chifeng Region Inner Mongolia |
| ISSN号 | 1000-0569 |
| 文献子类 | Article |
| 英文摘要 | Hosted within the late-Yanshanian Anjiayingzi monogranite, the Anjiayingzi gold deposit is controlled by NNE-trending faults and is characterized by altered-desseminated-type mineralization. Fluid inclusion investigations indicate that mineralizing fluid of the deposit is dominated by a CO2-H2O-NaCl-KCl system, with delta(D) and delta(18)O(H2O) ranging from -80.0 similar to -96.5 and 4.5 similar to 5.7parts per thousand, respectively, which is of a feature of magmatic source, probably from the Anjiayingzi granite. The gold mineralization can be subdivided into four stages, of which fluid inclusions have homogeneous temperatures of 340 similar to 360degreesC, 315 similar to 330degreesC, 245 similar to 285degreesC, and 150 similar to 170degreesC, respectively, with relatively lower CO2 densities and salinities of 3.80 similar to 6.20 wt%, 3.5 similar to 4.5 wt%,and < 2.0 wt%. Of the gaseous phases, the ratio of (CH4 + CO)/CO2 is less than 0.1, indicative of a weak deoxidization mineralizing condition, whereas among the liquid phases, K+ and Na+ contents are relatively high, with K+ > Na+, which is favorable to form alkalic metasomatic-type mineralization. According to data obtained from CO2-type inclusions, calculated mineralizing pressure is 500 similar to 750 x 10(5) Pa, equivalent to a depth of 2.0 similar to 2.5 km beneath the earth's surface. The gold mineralization was controlled by water-rock reaction, immiscibility of CO2 and H2O-NaCl solutions, and decrease of sulfur concentration. Of these, the water/rock reaction is the most important one, which probably occurred during the whole metallogenic process, controlling changing of the primary mineralizing fluid from weak acid to weak alkaline in composition, and led to metasomatic metallogeny. |
| WOS关键词 | CHINA |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000223562600017 |
| 出版者 | SCIENCE CHINA PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/64553]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Li, YG |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Inst Henan Geosci, Zhengzhou 450053, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, YG,Zhai, MG,Miao, LC,et al. Ore-forming fluids of the Anjiayingzi gold deposit in Chifeng region, Inner Mongolia.[J]. ACTA PETROLOGICA SINICA,2004,20(4):961-968. |
| APA | Li, YG,Zhai, MG,Miao, LC,Xue, LW,Zhu, JW,&Guan, H.(2004).Ore-forming fluids of the Anjiayingzi gold deposit in Chifeng region, Inner Mongolia..ACTA PETROLOGICA SINICA,20(4),961-968. |
| MLA | Li, YG,et al."Ore-forming fluids of the Anjiayingzi gold deposit in Chifeng region, Inner Mongolia.".ACTA PETROLOGICA SINICA 20.4(2004):961-968. |
入库方式： OAI收割
来源：地质与地球物理研究所
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