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| 藏南邦布大型造山型金矿成矿流体地球化学和成矿机制 | |
| 引用本文： | 孙晓明,韦慧晓,翟伟,石贵勇,梁业恒,莫儒伟,韩墨香,张相国.藏南邦布大型造山型金矿成矿流体地球化学和成矿机制[J].岩石学报,2010,26(6):1672-1684. |
| 作者姓名： | 孙晓明 韦慧晓 翟伟 石贵勇 梁业恒 莫儒伟 韩墨香 张相国 |
| 作者单位： | 1. 中山大学海洋学院,广州,510006;中山大学地球科学系,广州,510275;广东省海洋资源与近岸工程重点实验室,广州,510275 2. 中山大学地球科学系,广州,510275 3. 中山大学海洋学院,广州,510006;广东省海洋资源与近岸工程重点实验室,广州,510275 4. 西藏自治区地质矿产勘查开发局区域地质调查大队,拉萨,851400 |
| 基金项目： | 国家重点基础研究发展规划(“973”)项目 (2009CB421006、2002CB412610)、国家自然科学基金（40830425、40873034、40673045）、中央高校基本科研业务费专项基金和高等学校博士学科点专项科研基金（200805580031 ) |
| 摘 要： | 邦布金矿位于青藏高原雅鲁藏布江结合带东段的南侧,矿体受大型脆-韧性剪切带的次级断裂控制,是目前西藏境内已发现的为数不多的大型原生金矿之一。系统的显微测温和激光拉曼测定显示邦布金矿矿石中存在三类流体包裹体:(Ⅰ)纯液相水溶液包裹体;(Ⅱ)含CO2盐水溶液包裹体,此类包裹体又分为两相(Ⅱa)和三相(Ⅱb)两个小类;(Ⅲ)纯气相碳氢化合物包裹体。邦布金矿床中流体包裹体显微测温结果如下:含CO2盐水溶液包裹体的盐度范围为2.20%NaCleqv～9.45%NaCleqv,峰值在6.0%NaCleqv～7.0%NaCleqv,平均值为6.25%NaCleqv;均一温度的范围在166.7～335.8℃,峰值在210～250℃,平均值为235.4℃。相对应的密度范围在0.63～0.96g.cm-3,峰值为0.85～0.95g.cm-3,平均值为0.87g.cm-3。以含CO2盐水溶液包裹体为代表的邦布金矿床成矿流体具有富含CO2、低盐度、低密度、中低温度的特征,与造山型金矿成矿流体相似。同位素测定显示成矿流体的氢氧同位素组成分别为δDH2O=-44.4‰～-105.3‰,δ18OH2O=4.7‰～9.0‰,说明成矿流体主要为变质水,但有地幔流体的加入。综合成矿地质特征和成矿流体的证据,提出邦布金矿为喜马拉雅期陆陆碰撞造山型金矿。 |
| 关 键 词： | 流体包裹体 氢氧同位素组成 邦布金矿 藏南 碰撞造山型金矿 |
| 收稿时间： | 2010/3/20 0:00:00 |
| 修稿时间： | 2010/5/10 0:00:00 |
Ore-forming fluid geochemistry and metallogenic mechanism of Bangbu large-scale orogenic gold deposit in southern Tibet, China |
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| SUN XiaoMing,WEI HuiXiao,ZHAI Wei,SHI GuiYong,LIANG YeHeng,MO RuWei,HAN MoXiang and ZHANG XiangGuo.Ore-forming fluid geochemistry and metallogenic mechanism of Bangbu large-scale orogenic gold deposit in southern Tibet, China[J].Acta Petrologica Sinica,2010,26(6):1672-1684. | |
| Authors: | SUN XiaoMing WEI HuiXiao ZHAI Wei SHI GuiYong LIANG YeHeng MO RuWei HAN MoXiang and ZHANG XiangGuo |
| Institution: | School of Marine Sciences, Sun Yat-sen University, Guangzhou 510006, China; Department of Earth sciences, Sun Yat-sen University, Guangzhou 510275, China; Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, Guangzhou 510275, China;Department of Earth sciences, Sun Yat-sen University, Guangzhou 510275, China;School of Marine Sciences, Sun Yat-sen University, Guangzhou 510006, China; Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, Guangzhou 510275, China;School of Marine Sciences, Sun Yat-sen University, Guangzhou 510006, China; Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, Guangzhou 510275, China;School of Marine Sciences, Sun Yat-sen University, Guangzhou 510006, China; Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, Guangzhou 510275, China;Department of Earth sciences, Sun Yat-sen University, Guangzhou 510275, China;Department of Earth sciences, Sun Yat-sen University, Guangzhou 510275, China;Geological Survey of Tibet Bureau of Geology and Mineral Exploration and Development, Lhasa 851400, China |
| Abstract: | |
| Keywords: | Fluid inclusion H-O isotopic composition Bangbu gold deposit Southern Tibet Orogenic gold deposit |
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