四川冕宁县马头金矿成矿特征与找矿潜力分析  

Analysis on metallogenic characteristics and prospecting potential of Matou Au deposit in Mianning county of Sichuan province

作　　者：魏宇[1] 李俊俊[1] 柳维[1] 张庆松[1] 王维华[1] WEI Yu;LI Junjun;LIU Wei;ZHANG Qingsong;WANG Weihua(Sichuan Institute of Metallurgical and Geological Exploration, Chengdu 610051, China)

机构地区：[1]四川省冶金地质勘查院,成都610051

出　　处：《地质找矿论丛》2021年第4期406-415,共10页Contributions to Geology and Mineral Resources Research

基　　金：四川省自然资源厅2020年省政府性投资地质勘查(第一批)项目“四川省冕宁县马头金矿预查”资助。

摘　　要：冕宁马头金矿床位于上扬子陆块与羌塘—三江造山系的交界部位,金矿成矿与喜马拉雅期马头山—司依诺走滑断裂活动关系密切,矿体产于断裂旁侧的构造蚀变带内。金矿成矿受NNE向次级构造蚀变带、灰岩与辉绿岩脉以及二者的岩性转换界面控制。通过对矿床成矿条件、矿石特征、金的赋存状态等研究认为,马头金矿属于幔源岩浆中低温热液型金矿床。通过与相邻金矿区的对比、土壤异常成果分析、矿体延伸展布趋势分析,认为矿区地表及深部还有较好的找矿潜力。Matou Au deposit is located at the junction of Yangtze continental block and Qiangtang-Sanjiang orogenic system.The Au mineralization is closely related to activity of Himalayan Matoushan-Si Yinuo slip fault.Ore bodies occur in structure-alteration zones beside the slip fault and are controlled by NNE sub-structure-alteration zones,limestone,disease dykes and interface between the limestone and the diabase.Study on Metallogenic condition,Au ore characteristics and Au occurrences shows that the deposit is a mantle-derived magma meso-epithermal Au deposit.A conclusion is drawn from comparison of Matou Au deposit area with other Au deposit areas nearby and analysis of soil geo chemical anomaly and extension trend of ore bodies of the Au deposit that potential remain at surface and to depth of Matou area for further prospecting.

关 键 词：马头金矿 成矿特征 矿床成因 找矿潜力 冕宁县 四川省 

分 类 号：P613[天文地球—矿床学] P618.51[天文地球—地质学]