湘东大垄铅锌矿床成矿机理

发布时间：2018-03-10 05:26

本文选题：电子探针　切入点：流体包裹体　出处：《中国有色金属学报》2017年09期 　论文类型：期刊论文

【摘要】：大垄铅锌矿床位于湘东新华夏构造体系中坊楼北北东向构造带中部南东侧,邓阜仙复式岩体北端,矿体受南北向断裂控制。通过电子探针、流体包裹体和S、Pb、H、O同位素研究,分析矿床的成矿物质来源、成矿物理化学条件,探讨矿床成因及成矿过程。结果表明:矿床的形成与燕山期岩浆活动密切相关,成矿物质具有壳幔混合的特征,成矿流体主要源于岩浆水,有大气降水的加入;成矿温度属于中低温,成矿初期流体处于弱碱性、弱氧化的环境,后期向低温、低氧逸度、低硫逸度的环境转换,成矿深度为中深成。综合认为大垄铅锌矿床属于与燕山期岩浆活动有关的中低温热液铅锌矿床。
[Abstract]:The Darong Pb-Zn deposit is located in the east of the middle and south of the Fanglou NNE trending structural belt in the Neo-Huaxia structural system of eastern Hunan, and the northern end of the Dengfu Xianxian complex rock body. The orebody is controlled by the north-south fault. The ore body is studied by electron probe, fluid inclusions and S _ (Pb) Hau O isotopes. The origin, physicochemical conditions, genesis and metallogenic process of the deposit are analyzed. The results show that the formation of the deposit is closely related to the Yanshanian magmatic activity, and the ore-forming material has the characteristics of crust and mantle mixing. The ore-forming fluid is mainly derived from magmatic water with the addition of atmospheric precipitation, and the ore-forming temperature belongs to moderate and low temperature, the fluid is in a weakly alkaline and weakly oxidized environment in the early metallogenic stage, and the later period is an environmental transition to low temperature, low oxygen fugacity, low sulfur fugacity, and low oxygen fugacity. The ore-forming depth is medium and deep. It is considered that the Darong lead-zinc deposit belongs to the medium-low temperature hydrothermal lead-zinc deposit related to Yanshanian magmatic activity.
【作者单位】：中南大学有色金属成矿预测与地质环境监测教育部重点实验室;中南大学地球科学与信息物理学院;贵州省有色金属和核工业地质勘查局;
【基金】：中国地质调查局资助项目(12120114052101,12120114052201) 国家自然科学基金资助项目(41472302) 有色金属成矿预测与地质环境监测教育部重点实验室发展基金资助项目中南大学博士生自主探索创新基金资助项目(2015zzts069)~~
【分类号】：P618.4

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