粤北白水寨地区铀矿找矿潜力分析

Potential Analysis of Uranium Prospecting in Baishuizhai,Northern Guangdong Province

粤北下庄矿田位于南岭纬向构造带第二亚带中段的大东山—贵东花岗岩带东部,其大地构造位置处于华夏古陆西缘及闽赣后加里东隆起西南缘与湘、桂、粤北海西—印支坳陷的复合部位,铀成矿地质条件优越,是我国花岗岩型铀矿集区之一。本文通过对含矿岩性、控矿断裂以及放射性物化探等资料综合分析,结合近年来钻探成果,表明白水寨地区铀矿化严格受蚀变碎裂岩带及其上、下盘附近的蚀变碎裂花岗岩,以及花岗岩小岩体内、外接触带控制;认为区内岩浆活动多期多阶段、富铀热液活动多期次、含矿断裂构造带发育和围岩蚀变强烈,具备了铀成矿有利的地质条件,是下庄矿田内进一步开展铀矿找矿潜力较大的重要地区之一。

Xiazhuang uranium deposit field of northern Guangdong province is located in the middle of the second sub structure of south mountain structure belt,which is at the east of the Dadongshan-Guidong granite belts.Its geotectonic position is situated in the joint area of the edge of west old land of China and southwest of upheaved area of the late Caledonian period structure in the Fujian province and Jiangxi province,and the sunken area of the Hercynian-Indosinian period structure in Hunan province,Guangxi province and northern Guangdong province.It is one of the most important granite type uranium deposit regions where the geological conditions for uranium mineralization are rich.The uranium deposit prospecting potential of Baishuizhai area is analyzed combing the structure of geological conditions and radioactive geophysical and geochemical prospecting.Results show that the uranium resource is abundant with favorable lithology,structure conditions.It is one of the important places for future uranium prospecting.