综合地气测量在湘南仁里外围稀有金属矿勘查中的应用  

The application of an integrated geogas prospecting for exploring rare metal deposits in the periphery of the Renli mining area,southern Hunan Province

作　　者：甘雪军 周四春 刘晓辉 王登红[2] 文春华 GAN Xue-Jun;ZHOU Si-Chun;LIU Xiao-Hui;WANG Deng-Hong;WEN Chun-Hua(Applied Nuclear Technology in Geosciences Key Laboratory of Sichuan Province,Chengdu University of Technology,Chengdu610059,China;In-stitute of Mineral Resources,Chinese Academy of Geological Sciences,Beijing100037,China;Geological Survey Institute of Hunan Province,Chang-sha410083,China)

机构地区：[1]成都理工大学地学核技术四川省重点实验室,四川成都610059 [2]中国地质科学院矿产资源研究所,北京100037 [3]湖南省地质调查院,湖南长沙410083

出　　处：《物探与化探》2023年第6期1649-1656,共8页Geophysical and Geochemical Exploration

基　　金：国家重点研发计划项目(2017YFC0602701);湖南省重点领域研发计划项目(2019SK2261)。

摘　　要：在湘南仁里矿区外围的黄柏山测区部署了6条测线,应用综合地气测量开展了花岗伟晶岩稀有金属矿找矿研究。依据矿区已知伟晶岩矿脉上方土壤X射线荧光与地气异常特征,以X射线荧光测量获取的(Nb+Ta+Rb)衬度累加值为主要找矿指示,捕获了5个与地层走向一致的土壤X射线荧光异常带。1~4号异常带与已有的伟晶岩矿脉空间位置一致,对可能的伟晶岩矿脉的位置、走向及长度提供了评价依据,依据异常长度,有可能会显著延长原已知矿脉的长度;在测区南侧新发现的5号异常带,长度超过1 000 m,提供了新的找矿靶位。在长度超过1 500 m的4号主异常带中部11号测线开展了地气测量,捕获到反映伟晶岩脉深部矿化信息的Li、Be和Nb等元素的地气异常,证实测区内伟晶岩矿脉向深部有较大延伸。In this study,six survey lines were deployed in the Huangbaishan survey area in the periphery of the Renli mining area in southern Hunan Province.An integrated geogas prospecting was applied to explore granite pegmatite-type rare metal deposits in the study area.Based on the characteristics of soil X-ray fluorescence and geogas anomalies above the known pegmatite veins in the mining area,this study captured five soil X-ray fluorescence anomaly zones aligning with the formation trend,with the(Nb+Ta+Rb)cumulative value obtained from X-ray fluorescence measurements as the primary prospecting indicator.The Nos.1~4 anomaly zones exhibit consistent spatial positions with the known pegmatite veins.Accordingly,this study inferred the positions,trends,and lengths of possible pegmatite veins,and a possibility of extension for the known veins based on the anomaly length.The No.5 anomaly zone discovered on the south side of the survey area,with a length exceeding 1000 m,serves as a new prospecting target.Geogas prospecting was conducted along the No.11 survey line in the middle of the No.4 anomaly zone with a length of over 1500 m,capturing the geogas anomalies of elements Li,Be,and Nb that reflect the deep mineralization information of pegmatite veins.This confirms that pegmatite veins in the survey area have significant extensions towards the deep part.

关 键 词：土壤X射线荧光测量 (Nb+Ta+Rb)衬度累加值 地气测量 深部含矿信息 花岗伟晶岩稀有金属矿 

分 类 号：P632[天文地球—地质矿产勘探]