甘肃阳山金矿流体包裹体地球化学和矿床成因类型

李晶 陈衍景 李强之 赖勇 杨荣生 毛世东

甘肃阳山金矿流体包裹体地球化学和矿床成因类型

李晶陈衍景李强之赖勇杨荣生毛世东

- [1]中国科学院广州地球化学研究所成矿动力学重点实验室,广州510640 [2]北京大学造山带与地壳演化实验室,北京100871 [3]中国科学院研究生院,北京100049 [4]武警黄金部队指挥部,北京100102
基金项目:
国家973项目2006CB403508课题、国家自然科学基金项目（Nos.40425006和40572065）、科学院百人计划项目和武警黄金部队科研项目、南京大学内生金属矿床成矿机制研究国家重点实验室开放研究基金资助.致谢南京大学倪培教授和丁俊英老师指导了流体包裹体测试工作,野外调研得到武警黄金部队第十二支队的大力支持和张复新教授指导,特此致谢.

刊出日期: 2007-09-30

Fluid inclusion geochemistry and genetic type of the Yangshan gold deposit, Gansu, China

LI Jing, CHEN YanJing , LI QiangZhi, LAI Yong, YANG RongSheng and MAO ShiDong

- 1.KLMD , Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China;2. Key Laboratory of Orogen and Crust Evolution, Peking University, Beijing 100871, China ;3.Graduate School of the Chinese Academy of Sciences, Belting 100049, China ;4.Headquarter of Gold Exploration Branch of Armed Police, Beijing 100102, China

Publish Date: 30 September 2007

摘要

摘要: 西秦岭造山带内的甘肃阳山金矿是我国最新发现的规模最大的金矿床。矿床受EW韧脆性剪切带控制，赋矿围岩为泥盆系碳质碳酸盐-千枚岩-板岩和侵入其中的花岗斑岩脉。流体成矿过程包括：形成石英-绢云母-黄铁矿组合的早阶段，形成石英-黄铁矿-毒砂和石英-毒砂-黄铁矿以及石英-碳酸盐-辉锑矿-自然金组合的主戍矿阶段，形成碳酸盐-石英网脉的晚阶段。早阶段流体包裹体以含CO2包裹体为主，CO2含量为7．3％-21．5mol％，均一温度集中于270℃～300℃，盐度〈3wt．％NaCleqv；主阶段发育纯CO2包裹体、水溶液包裹体和少量含CO2包裹体，均一温度集中于210℃～270℃，盐度集中在〈2wt，％NaCleqv和3～5wt，％NaCleqv两个范围；晚阶段只发育水溶液包裹体，均一温度集中在160℃-210℃，盐度〈3wt．％NaCleqv。主阶段流体包裹体类型的多样性、相似的均一温度和流体盐度的双峰特征均指示流体沸腾现象的存在，其流体包裹体捕获温度为210℃～375℃，压力为85～222MPa；赋矿断层的阀门式活动导致主阶段流体系统交替于静岩和静水压力之间，成矿深度为8．5km左右，成矿流体系统发育在早侏罗世大陆碰撞造山过程。矿床地质特征类似于卡林型金矿，但赋存于蚀变花岗斑岩中矿体既非造山型，也不同于卡林型，成矿流体具造山型矿床特征。因此，阳山金矿可能代表一种新的金矿类型，建议称为“阳山型金矿”。
- 阳山金矿 /
- 阳山型金矿床 /
- 流体包裹体 /
- 成矿流体 /
- 秦岭造山带
- Yangshan gold deposit /
- Yangshan-type gold deposit /
- Fluid inclusion /
- Ore-fluid /
- Qinling Orogen

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参考文献(23)

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甘肃阳山金矿流体包裹体地球化学和矿床成因类型

Fluid inclusion geochemistry and genetic type of the Yangshan gold deposit, Gansu, China

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