广西大瑶山地区锡钨-稀有金属矿地表标志带特征与找矿评价  

Characteristics of surficial indicator zone and prospecting evaluation of tin-tungsten and rare metal deposits in Dayaoshan area of Guangxi

作　　者：孙兴庭 周国发 叶小拼 孙明行 吴祥珂 梁标志 韦安伟 SUN Xingting;ZHOU Guofa;YE Xiaopin;SUN Minghang;WU Xiangke;LIANG Biaozhi;WEI Anwei(Guangxi Institute of Geological Survey,Nanning 530023,China;Guangxi Bureau of Geology and Mineral Prospecting,Nanning 530023,China;Guangxi Mechanical and Electronics Industry School,Nanning 530023,China;Mineral Resource Reservoir Evaluation Center of Guangxi,Nanning 530029,China)

机构地区：[1]广西壮族自治区地质调查院,南宁530023 [2]广西壮族自治区地质矿产勘查开发局,南宁530023 [3]广西机电工业学校,南宁530023 [4]广西壮族自治区矿产资源储量评审中心,南宁530029

出　　处：《桂林理工大学学报》2023年第2期193-201,共9页Journal of Guilin University of Technology

基　　金：广西壮族自治区第八批自治区级人才小高地项目(桂组通字〔2019〕85号);广西地质矿产勘查开发局部门前期勘查项目(桂地矿地〔2021〕11号);广西教育厅教改研究项目(GXZZJG2019B067)。

摘　　要：大瑶山地区成矿地质条件与华南其他典型的锡钨矿产区相似,与岩浆作用有关的钨矿床、与隐伏岩体相关的锡钨-稀有金属矿为该区今后找矿的重点之一,但与之相应的云母线脉等特征标志带的识别和评价不足。大瑶山中北部昭平地区已发现的云母线脉带与华南钨锡矿床典型的“五层楼”成矿模式中顶上带特征相似,对隐伏岩体和矿床指示明显;对其标志带产出及分带特征、地球化学异常、岩浆岩条件的分析,以及与珊瑚钨锡矿的对比,显示整个云母线脉带及单一线脉均具有较好的矿物组合分带性,且云母线脉中可检出微量元素数目及分布特征与珊瑚钨锡矿区可类比性强,判断为有矿标志带。同时,对以往大瑶山地区这类标志带未被识别的原因进行分析,通过综合分析物化探异常特征、标志带的水平和垂向变化规律、矿化分带等信息,对标志带深部锡钨-稀有金属矿找矿潜力、赋矿位置、矿化类型、深度等进行了初步预测,以期为大瑶山地区这类厚覆盖、以隐伏岩体成因的隐伏锡钨-稀有金属矿找矿为主的地区提供勘查评价参考。The ore-forming geological conditions in Dayaoshan area are similar to the typical distribution areas of tin-tungsten deposits in South China,and some tungsten deposits related to magmatism have been discovered.However,the recognition and evaluation of the alteration zone are insufficient.The surficial indicator zone of Zhaoping area in north-central Dayaoshan shows the characteristics of the top zone in the typical“five levels”zonation model of tin-tungsten polymetallic deposits in South China,which has obvious indication for concealed rock mass and deposit.Based on the analysis of the characteristics of the surficial indicator zone,the geochemistry anomaly,the magmatic rock conditions,and compared with Shanhu tin-tungsten deposit,it is considered to be a ore bearing indicator zone.At the same time,the reasons why such characteristic indicator zone in Dayaoshan area have not been recognized in the past,the prospecting potential,ore hosting location,mineralization type and depth of the deep tin-tungsten are analyzed in this paper,and rare metal deposits are preliminarily predicted,so as to provide a reference for exploration and evaluation in some areas similar to Dayaoshan area where the concealed tin-tungsten-rare metal deposits are mainly formed by concealed rock mass.

关 键 词：锡钨-稀有金属矿 地表标志带 “五层楼”模式 找矿评价 大瑶山地区 

分 类 号：P613[天文地球—矿床学] P618.44[天文地球—地质学]