湘东北仁里矿区西侧X荧光异常特征及找矿意义  

The anomaly features and prospecting significance of X-ray fluorescence in exploration area on the west of Renli mining area in northeastern Hunan Province

作　　者：金益帆 刘晓辉[1,2] 张庆贤 文春华 曹创华 刘钧 张利军 张立平 JIN Yifan;LIU Xiaohui;ZHANG Qingxian;WEN Chunhua;CAO Chuanghua;LIU Jun;ZHANG Lijun;ZHANG Liping(College of Applied Nuclear Technology and Automation Engineering,Chengdu University of Technology,Chengdu,610059;Key Laboratory of Metallogenesis and Mineral Prediction(Ministry of Natural Resources),Institute of Mineral Resources,Chinese Academy of Geological Sciences,Beijing,100037;Hunan Institute of Geological Survey,Changsha,410116;Institute of Hunan Nonferrous Geological Exploration,Changsha,410015;Hunan Nuclear Geology 311 Brigade,Changsha,410100)

机构地区：[1]成都理工大学核技术与自动化工程学院,成都610059 [2]中国地质科学院矿产资源研究所自然资源部成矿作用与矿产预测重点实验室,北京100037 [3]湖南省地质调查院,长沙410116 [4]湖南省有色地质勘查研究院,长沙410015 [5]湖南省核工业地质局311队,长沙410100

出　　处：《地质论评》2022年第3期955-964,共10页Geological Review

基　　金：成矿作用与矿产预测国家重点实验室开放基金项目“幕阜山地区伟晶岩型稀有金属矿综合地气探测技术示范”(编号:ZS2005);湖南省重点领域研发计划“湖南省锂铌钽等稀有金属资源高效勘查与开发”重点专项(编号:2019SK2261);四川省科技计划(编号:2021JDTD0018)的成果。

摘　　要：湖南湘东北幕阜山地区新发现了仁里超大型钽铌矿床,为寻找伟晶岩型稀有金属矿床提供了新的研究思路。研究表明湘东北地区是铌—钽—锂—铍稀有金属矿重要的成矿区域,项目在仁里矿区西侧找矿勘查区开展了遥感—地球物理—化探—X荧光—地气分析综合探测研究工作,以建立南方高植被覆盖区伟晶岩型稀有金属找矿高效、快速勘查技术方法体系。本次研究利用X荧光勘查技术,对工作区布设的3条共长3000 m的测线,共153个测点的土壤样品进行了分析,每个测点获得了Nb、Ta、Rb等重要成矿元素的含量。通过矿致X荧光异常特征的分析,确定了工作区内异常的性质,与已获得的勘查成果比较,符合程度较好,并且在一条测线上推测可能存在未探明的含铌钽矿伟晶岩脉,为后续的勘探工作提供线索。同时也表明了X荧光勘查方法具有良好的找矿效果,可以为找矿提供参考和指示作用。The discovery of Renli ultra-large tantalum—niobium deposit in Mufushan area, northeastern Hunan Province, provides a new research idea for finding pegmatite-type rare metal deposits. The study shows that northeastern Hunan is an important metallogenic area of niobium—tantalum—lithium—beryllium rare metal deposits. The project carried out remote sensing—geophysics—geochemical exploration—X-ray fluorescence—geogas analysis comprehensive exploration research in the western prospecting area of Renli mining area, in order to establish an efficient and rapid prospecting technology and method system for pegmatite rare metal deposits in high vegetation coverage areas in the South. In this study, X-ray fluorescence exploration technology was used to measure the soil samples of 153 measuring points in 3 survey lines with a total length of 3000 m in the working area. The contents of Nb, Ta, Rb and other important metallogenic elements were obtained at each measuring point. Through the analysis of the characteristics of ore-induced X-ray fluorescence anomaly, the nature of the anomaly in the working area is determined. Compared with the obtained exploration results, it is in good agreement, and it is speculated that there may be an unproven pegmatite vein of niobium—tantalum ore on a survey line, which provides basis for subsequent exploration engineering work. It also shows that X-ray fluorescence exploration method has good prospecting effect and can provide reference and indication for prospecting.

关 键 词：土壤X荧光测量 花岗伟晶岩型铌钽矿 异常特征 

分 类 号：P618.7[天文地球—矿床学]