诸广岩体中部塘湾地区铀成矿地质条件及找矿潜力  

Uranium Metallogenic Geologica l Conditions and Prospecting Potential about Tangwan Area in Central Zhuguang Pluton

作　　者：刘文泉[1] 赖静 吴德海 江卫兵[1] LIU Wenquan;LAI Jing;WU Dehai;JIANG Weibing(Research Institute No.290,CNNC,Shaoguan 512029,China;School of Resources,Environment and Jewelry,Jiangxi College of Applied Technology,Ganzhou 341000,China)

机构地区：[1]核工业二九〇研究所,广东韶关512029 [2]江西应用技术职业学院资源环境与珠宝学院,江西赣州341000

出　　处：《金属矿山》2022年第4期138-148,共11页Metal Mine

基　　金：中国核工业地质局地质勘查项目(编号:201926,202138-1);“十三五”国家重点研发计划项目(编号:2017YFC0602600);核资源与环境国家重点实验室开放基金项目(编号:2020NRE03)。

摘　　要：塘湾地区位于粤北诸广岩体中部,发现有区内唯一的中型铀矿床。结合前人成果和近年地质调查、物化探和钻探揭露等工作成果,分析、总结了塘湾地区的大地构造背景、岩浆岩、构造及围岩蚀变等铀成矿地质条件。研究表明:(1)塘湾地区广泛分布有燕山期各阶段富铀产铀花岗岩,具有较好的铀源条件;(2)构造形态和构造力学性质等条件均有利于铀成矿,详细总结了具体的成矿、找矿构造有利部位;(3)热液蚀变强烈而广泛,与铀矿化关系最密切的是硅化、赤铁矿化、黄铁矿化和萤石化;(4)热液蚀变划分了成矿前、成矿期、成矿后共3期6个阶段,水平方向上首次划分了硅化和赤铁矿化蚀变带、水云母化蚀变带、高岭土化蚀变带、碱性长石蚀变带和正常花岗岩带。在此基础上,根据区内地表矿化信息以及物化探异常等矿化线索,开展了铀成矿预测评价,圈定了具体的成矿找矿有利地段并相应完成了钻探验证工作,进一步扩大了主矿规模并且新发现系列工业铀矿体,证明了塘湾矿床及外围具有较好的找矿潜力,分析成果为下一步找矿工作提供了参考。Tangwan area was located in the middle of Zhuguang pluton in Guangdong Province. The only medium-sized uranium deposit was founded in this area. Combining with previous achievements and a series of geophysical and geochemical exploration work,detailed surface survey and drilling exposure work finished in recent years,this article comprehensively analyzed and summarized the geological conditions of uranium mineralization in Tangwan area from the aspects of geological background,magmatic rock characteristics,structural characteristics and wall rock alteration. The results showed that:(1) Uranium rich and producing granites of various stages of Yanshanian Period were widely distributed in Tangwan area,which provided good uranium source conditions.(2) The conditions of structure morphology and mechanical properties were conducive to uranium mineralization,and the specific favorable parts of mineralization and prospecting were summarized in detail.(3) Hydrothermal alteration was intense and extensive,which closely to uranium mineralization were silicification,hematitization,pyritization and fluoritization.(4) The hydrothermal alteration was divided into premineraliztion,mineraliztion and post-mineraliztion three periods including six stages,and hydrothermal alteration zoning was divided for the first time into silicification and hematitization zone,hydromicazation zone,kaolinitization zone,alkali feldspathization zone and normal granite zone. On this basis,according to the surface mineralization information,geophysical and geochemical anomalies and other mineralization clues,the prediction and evaluation of uranium mineralization in the area were carried out,and the specific favorable areas for ore-forming and prospecting were delineated. The drilling verification work was carried out and the scale of the main orebody has been further expanded and some new ore-body were founded,which proved that Tangwan area has further prospecting potential.

关 键 词：铀矿 找矿潜力 成矿地质条件 矿床地质特征 塘湾地区 诸广岩体 

分 类 号：TD11[矿业工程—矿山地质测量] P612[天文地球—矿床学]