下庄矿田大帽峰铀矿床深部找矿方向探讨

摘要

通过分析大帽峰铀矿床的成矿特征及成矿务件,认为区内铀成矿作用主要受102组带、下庄岩体与帽峰岩体、硅化及赤铁矿化等热液蚀变形成的成矿环境控制.资料综合分析显示,矿床已查明B51矿体群向北东向侧伏,且矿体往深部未封边.同时最新普通物探勘查成果认为,102组带往深部可延伸至-1 100m标高,且矿床深部存在规模较大的近水平低阻异常带,当两者交汇复合处异常范围增大、低阻性增强.根据矿床成矿规律,推测大帽峰铀矿床深部102号带与不同岩性界面交汇处存在与已查明矿体B51相似的铀矿体群,而构造与水平低阻异常带复合部位为下一步铀矿勘查工作的重点.%Through analyzing metallogenic characteristics and metallogenic conditions of Damaofeng uranium deposit,we conclude that uranium deposit was formed in place where the 102 groups,Xiazhuang and Maofeng pluton,silicified and hematite mineralization hydrothermal alteration formation.Data comprehensive analysis shows that the B51 ore bodies are trending to the east side,and the ore body is not deep to the edge;meanwhile,the latest common geophysical exploration results show that the 102 group can be extended to the depth of-1 100 m and there is a big hat larger nearly level low resistivity anomaly zone in the depth of Damaofeng uranium deposit,abnormal range increasing and low resistance enhancing when the intersection between the two composite.Based on the metallogenic regularity of ore deposits,it is speculated that there exists a similar orebody which is similar to that of the identified B51 from where the 102 fault zone joins the different lithology interface in the depth of Damaofeng uranium deposit,and the key point of the next step of uranium exploration is the composite site of structure and low resistivity anomaly belt.