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.
作者
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
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)
出处
《地球科学》
EI
CAS
CSCD
北大核心
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).
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
trace element of quartz
fluid inclusion
chlorite
Huxu Au-Pb-Zn deposit
Dongxiang volcanic basin
ore deposit geology
