辽东铀成矿带黄沟铀矿床地质特征及成因探讨

发布时间：2018-10-13 14:02

【摘要】：连山关地区位于华北陆块铀成矿省辽东铀成矿带。笔者近几年在连山关地区开展铀矿普查找矿工作,通过黄沟铀矿床野外工作和室内研究,对其赋矿围岩的岩石学特征、地球化学特征、蚀变特征进行了细致研究。结果表明:赋矿围岩重熔混合岩有4种类型,主要特点是石英含量高,绿泥石含量变化大,石英与绿泥石的含量呈负相关;地球化学特征表明其主量元素具富Si、略富Al、富Na、富K和低Mg、低Ca特点;微量元素表现出富集Be、Mo、Pb、Y、Ba、La、Cu和亏损Co、Ni、Zn、Cr、Ti、V等特点;与铀关系密切的共生元素有Pb、Mo、V、Be;稀土元素具有明显的轻稀土元素富集和重稀土元素相对亏损等特征,具有较显著的Eu负异常;蚀变特征研究表明胶状黄铁矿化、绿泥石化、硅化与铀矿化关系密切。最后探讨了铀矿成因,并首次提出了重熔混合岩热液型铀矿。
[Abstract]:Lianshanguan area is located in the uranium metallogenic belt of North China block uranium metallogenic province in Liaodong. In recent years, the author has carried out uranium prospecting in Lianshanguan area. Through field work and laboratory study of the Huanggou uranium deposit, the petrological, geochemical and alteration characteristics of the ore-bearing surrounding rock have been studied in detail. The results show that there are four types of ore-bearing rock remelted migmatite, which is characterized by high quartz content, great change of chlorite content, and negative correlation between quartz and chlorite content. The geochemical characteristics indicate that the main elements are rich in Si, slightly rich in Al, rich in K and low in Mg, and low in Ca, and trace elements show the characteristics of enrichment of Be,Mo,Pb,Y,Ba,La,Cu and depletion of Co,Ni,Zn,Cr,Ti,V, etc. The symbiotic elements closely related to uranium include Pb,Mo,V,Be; rare earth elements with obvious characteristics of light REE enrichment and relative depletion of heavy rare earth elements, and significant negative Eu anomalies. Silicification is closely related to uranium mineralization. Finally, the genesis of uranium ore is discussed, and the hydrothermal uranium ore of remelting mixed rock is proposed for the first time.
【作者单位】：核工业二四0研究所;吉林大学地球科学学院;
【基金】：中国核工业地质局勘查项目(201160) 国家重点研发计划项目(2016YFC0600108-02)~~
【分类号】：P619.14

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