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
抄尉尉 1许德如 2李增华 2陈立泉 3周先军 3袁波 2杨立飞 2陈加杰 2张健2
作者信息
- 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
- 折叠
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.
Abstract
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.
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Key words
trace element of quartz/fluid inclusion/chlorite/Huxu Au-Pb-Zn deposit/Dongxiang volcanic basin/ore deposit geology引用本文复制引用
基金项目
国家自然科学基金项目(2110700658)
国家自然科学基金项目(42102101)
2019年江西省"SQ计划"(2120800002)
出版年
2024
NETL
NSTL
万方数据