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

作　　者：抄尉尉 许德如 李增华 陈立泉 周先军[3] 袁波 杨立飞 陈加杰 张健 Chao Weiwei;Xu Deru;Li Zenghua;Chen Liquan;Zhou Xianjun;Yuan Bo;Yang Lifei;Chen Jiajie;Zhang Jian(State Key Laboratory of Nuclear Resources and Environment,East China University of Technology,Nanchang 330013,China;School of Earth Sciences,East China University of Technology,Nanchang 330013,China;No.1 Geological Party of Jiangxi Nonferrous Metals Geological Exploration Bureau,Yingtan 335003,China)

机构地区：[1]东华理工大学核资源与环境国家重点实验室,江西南昌330013 [2]东华理工大学地球科学学院,江西南昌330013 [3]江西有色地质勘查一队,江西鹰潭335003

出　　处：《地球科学》2024年第4期1292-1306,共15页Earth Science

基　　金：国家自然科学基金项目(Nos.2110700658,42102101);2019年江西省“SQ计划”(No.2120800002).

摘　　要：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Al^(3+)+Li^(+)=Si^(4+),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 Al^(3+)+Li^(+)=Si^(4+).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.

关 键 词：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 

分 类 号：P611[天文地球—矿床学] P595[天文地球—地质学]