Fluid evolution of alteration and mineralization at the Duobaoshan porphyry Cu (Mo) deposit, Heilondiang Province
文献类型：期刊论文
| 作者 | Wei Rao1; Xu JiuHua1; Zeng QingDong2; Wang YanHai1; Liu JianMing2; Chu ShaoXiong2,3 |
| 刊名 | ACTA PETROLOGICA SINICA
 |
| 出版日期 | 2011-05-01 |
| 卷号 | 27期号:5页码:1361-1374 |
| 关键词 | Fluid inclusion Mineralization stage Minerogenesis mechanism Duobaoshan porphyry Cu (Mo) deposit |
| ISSN号 | 1000-0569 |
| 文献子类 | Article |
| 英文摘要 | The Duobaoshan porphyry Cu (Mo) deposit, located in the eastern part of Xingmeng orogenic bait, is the largest porphyry deposit in the Duobaoshan-Aershan metallogenic belt on the central and northern of Daxinganling. The orebodies are mainly hosted in granodiorite and the lower strata of Duobaoshan Formation. According to the vein types and their crosscutting relationships, wallrock alterations, mineral assemblages, alteration and mineralization of the Duobaoshan porphyry Cu (Mo) deposit can be divided into four stages from early to late stage: I Potassium silicification stage; II silicification-molybdenum mineralizing stage; M phyllic-copper mineralizing stage; and IV carbonate-quartz stage. Fluid inclusions in quartz can be identified as aqueous water, CO(2)-rich, daughter mineral-bearing and, pure CO(2) inclusions. Ore-forming fluids evolved with the regularity from early stage to late stage. Fluid inclusions in potassium silicification stage are characterized by aqueous water, CO(2)-rich and pure CO(2) inclusions, with homogenization temperatures of 245 similar to 400 degrees C, salinities of 6% similar to 10% NaCleqv, and densities of 0.5 similar to 0. 9g.cm(-3). In silicification-molybdenum mineralizing stage, fluid incusions are mainly aqueous water, CO(2)-H(2)O, daughter mineral-bearing, with peak homogenization temperatures of 260 similar to 300 degrees C, salinities of 1.7% similar to 39% NaCleqv,, and densities of 0.3 similar to 1.1g.cm(-3). Fluid inclusions phyllic-copper mineralizing stage are much more complex, characterized by aqueous water, CO(2)-H(2)O with peak homogenization temperatures of 220 similar to 280 degrees C, salinities of 0.1% similar to 24.8% NaCleqv,, and densities of 0.5 similar to 1.0g .cm(-3). In carbonate-quartz stage, fluid inclusios are simply aqueous water, with homogenization temperatures of 125 similar to 170 degrees C, salinities of 0.5% similar to 12.8% NaCleqv, and densities of 0.8 similar to 0.9g.cm(-3), Laster Raman spectroscopic analysis indicate that components of fluid inclusions are mainly H(2)O and CO(2). In this paper, trapping pressures of fluid inclusions are estimated to be 110 similar to 160MPa, 58 similar to 80MPa, and 8 similar to 17MPa for stage I, II and III. Microthermomatic with the phenomenon of field and inclusion petrography indicate: Duobaoshan porphyry Cu (Mo) deposit is a complex tectonic-magmatic ore-forming system with thermal fluids from different sources; tectonic fracture system provided a good space for ore-forming fluids to migrate and precipitate. Boiling and Immiscibility of fluids caused by changes in temperature, pressure and open space, mixture of different fluids, changes in composition and pH resulted by water-rock interaction are main minerogenesis mechanism of Duobaoshan porphyry Cu (Mo) deposit. |
| WOS关键词 | FREEZING-POINT DEPRESSION ; HEILONGJIANG PROVINCE ; COPPER-DEPOSIT ; INCLUSIONS ; CHINA ; TEMPERATURES ; H2O-NACL |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000292712600011 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/74468]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Wei Rao |
| 作者单位 | 1.Univ Sci & Technol Beijing, Resource Engn Dept, Beijing 100083, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 3.Chinese Acad Sci, Grad Univ, Beijing 100039, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wei Rao,Xu JiuHua,Zeng QingDong,et al. Fluid evolution of alteration and mineralization at the Duobaoshan porphyry Cu (Mo) deposit, Heilondiang Province[J]. ACTA PETROLOGICA SINICA,2011,27(5):1361-1374. |
| APA | Wei Rao,Xu JiuHua,Zeng QingDong,Wang YanHai,Liu JianMing,&Chu ShaoXiong.(2011).Fluid evolution of alteration and mineralization at the Duobaoshan porphyry Cu (Mo) deposit, Heilondiang Province.ACTA PETROLOGICA SINICA,27(5),1361-1374. |
| MLA | Wei Rao,et al."Fluid evolution of alteration and mineralization at the Duobaoshan porphyry Cu (Mo) deposit, Heilondiang Province".ACTA PETROLOGICA SINICA 27.5(2011):1361-1374. |
入库方式： OAI收割
来源：地质与地球物理研究所
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