桃山铀矿田高田地区铀成矿地质特征及远景分析

Uranium metallogenic characteristics and prospect in Gaotian area of Taoshan ore field

高田地区位于桃山铀矿田的东北部,区内出露一套浅变质岩的富铀地层。燕山早期第一阶段的斜脑山岩体、第三阶段的打鼓寨岩体,均为含矿岩体。区内断裂构造非常发育,主要为NNE、NE向,倾向整体呈SE向,局部F2构造倾向NW。铀矿体受多期次构造、次级构造控制,多赋存于碎裂花岗岩中,矿石构造以微脉浸染状、角砾状为主,矿化类型有铀-赤铁矿化型、铀-硅化型。区内4条铀矿化带中发现了多个工业矿体和矿化体,以U5、U6为主要矿体。通过对铀源条件、构造活动、铀矿化特征、热液活动发育情况的分析和研究,预测高田地区有较大成矿潜力,也为下一步资源勘查提供参考。

Gaotian area is located in the northeastern part of Taoshan uranium field.In the early Yanshan period,both Xienaoshan pluton in the first stage and Daguzhai pluton in the third stage are ore-hosting rocks.The fault structure in the region is well developed,mainly in the NNE direction and NE direction,which generally dip to SE direction,while the local F 2 fault dip to the northwest.Uranium ore body is controlled by multi-stage structure and secondary structure,and occurs mostly in cataclastic granite.The ore is mainly micro-vein disseminated and brecciated,and the mineralization types are uranium-hematite type and uranium-silicification type.A number of ore bodies and mineralized bodies have been found in four uranium mineralization belts in the zone,with U5 and U6 as the main ore bodies.Based on the analysis and the study of uranium source conditions,tectonic activity,uranium mineralization characteristics and hydrothermal activity development,this paper predicts that there is a great metallogenic potential in Gaotian area.