分量化探在琶江地区深部铀矿勘查中的应用研究  

Application of Partial Extraction Geochemical Exploration Method in the Prospecting of Deep Uranium Mineralization in Pajiang Area

作　　者：胡鹏 张凡颖[1] 王兴明 傅俊杰[1] 张家乐 HU Peng;ZHANG Fanying;WANG Xingming;FU Junjie;ZHANG Jiale(Research Institute No.290,CNNC,Shaoguan,Guangdong 512029,China;College of Nuclear Technology and Automation Engineering,Chengdu University of Technology,Chengdu,Sichuan 610059,China)

机构地区：[1]核工业二九〇研究所,广东韶关512029 [2]成都理工大学核技术与自动化工程学院,四川成都610059

出　　处：《铀矿地质》2025年第2期332-346,共15页Uranium Geology

基　　金：中国核工业地质局项目“广东省仁化县蛇离地区铀矿资源调查评价”(编号:202438-5)和“广东省和平县古坑-李田地区铀矿资源调查评价项目”(编号:202439-4)联合资助。

摘　　要：琶江矿床(401)是佛冈岩体目前已发现的唯一小型铀矿床,为评价矿床外围深部铀成矿潜力,同时也为探寻分量化探在琶江地区找矿预测中的有效性以及深部铀矿找矿指示元素组合,优选铀成矿地质条件较好的社岗断裂、3号带及17号带夹持区开展分量化探面积测量。方法有效性试验及矿床外围的找矿实践表明:在琶江地区采用分量化探方法预测深部隐伏铀矿是可行、有效的,深部铀矿找矿指示元素组合为U-Mn-Be-Ba。依据铀矿找矿指示元素异常复合情况及所属地质情况,在琶江矿床(401)外围预测A、B处铀成矿有利地段,并经槽探工程揭露发现3段工业矿化,其水平厚度和品位分别为1.16 m(0.083%)、0.74 m(0.093%)、0.28 m(0.646%),取得较好的找矿应用效果,同时也为扩大琶江矿床(401)规模奠定坚实基础。The Pajiang deposit(401)is the only small uranium deposit found in the Fogang pluton.To evaluate the potential of uranium mineralization in the deep part of the deposit and validate the effectiveness of partial extraction geochemical exploration method as well as searching the indicator elements combination for deep uranium exploration,the partial extraction geochemical exploration was carried out in the intersection part of Shegang fault,faults No.3 and No.17,where favorable uranium metallogenic geological conditions are identified.The method's validity test and prospecting practice in the periphery of the deposit demonstrate that partial extraction geochemical exploration is both feasible and effective in predicting concealed deep uranium deposits in the Pajiang area,with U-Mn-Be-Ba serving as an indicator element combination.Based on the anomalies of uranium exploration indicator elements and their geological conditions,two areas(A and B)were predicted as the favorable targets for uranium mineralization around the Pajiang deposit(401).After trench exploration,three industrial mineralization sector were discovered with the horizontal thickness and grade of 1.16 m(0.083%),0.74 m(0.093%)and 0.28 m(0.646%),respectively,which not only have good prospecting and application effect,but also lay a solid foundation for expanding the scale of Pajiang deposit.

关 键 词：分量化探 铀矿 琶江地区 深部找矿潜力 指示元素组合 

分 类 号：P619.14[天文地球—矿床学]