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江西虎圩金铅锌矿床矿物化学、流体包裹体特征及地质意义
抄尉尉, 许德如, 李增华, 陈立泉, 周先军, 袁波, 杨立飞, 陈加杰, 张健
PDF(10860 KB)
PDF(10860 KB)
江西虎圩金铅锌矿床矿物化学、流体包裹体特征及地质意义
Characteristics and Geological Implications of Mineral Chemistry and Fluid Inclusions in Huxu Au-Pb-Zn Ore Deposit, Jiangxi Province
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为了深入研究东乡盆地中金属矿床的成因类型，选取虎圩金铅锌矿床为研究对象，运用EPMA和LA-ICP-MS等方法开展石英微量元素分析、绿泥石化学成分组成和流体包裹体测温等研究.研究结果表明，石英中微量元素主要替换方式为Al3++Li+=Si4+，成矿流体的pH值在成矿过程中发生周期性变化.包裹体类型主要为气液两相包裹体，绿泥石形成于相对低氧逸度和高硫逸度环境，成矿温度约为210~280 ℃.综合前人研究，认为虎圩金铅锌矿床在成矿过程中不断发生岩浆热液和天水的混合，伴随不同程度的水岩反应，在断裂的开阔空间沉淀形成矿脉.认为虎圩矿床属于浅成低温热液矿床，深部存在隐伏斑岩岩体.
To study the genesis of ore deposits in the Dongxiang volcanic basin, the Huxu Au-Pb-Zn deposit was selected as the research object, and a detailed study of quartz trace elements, fluid inclusions thermometry and chemical compositions of chlorite was carried out. The results indicate that the main element substitution mechanism is Al3++Li+ = Si4+.The pH of the ore-forming fluids is fluctuated episodically. The fluid inclusions are mainly gas-liquid type. The chlorite formed in an environment with relatively high sulfur fugacity and low oxygen fugacity. The ore-forming temperature is estimated to be 210-280 ℃.Combined with previous studies, it suggests that the Huxu deposit evolved with varying mixing ratio of magmatic fluids and meteoric water, accompanied by fluid-rock interaction, leading to the precipitation of ore veins in the opening fractures. The Huxu deposit is considered as epithermal deposit, with buried porphyry body.
石英微量元素 / 流体包裹体 / 绿泥石 / 虎圩金铅锌矿床 / 东乡火山盆地 / 矿床学
trace element of quartz / fluid inclusion / chlorite / Huxu Au-Pb-Zn deposit / Dongxiang volcanic basin / ore deposit geology
P611 / P595
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野外工作得到江西有色地质勘查一队的大力支持与帮助，实验工作得到东华理工大学核资源与环境国家重点实验室邬斌、钟福军、张明记、万建军的指导和建议，两位匿名审稿人对本文提出了建设性修改意见，在此一并表示感谢！
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