冀北高尖子地区土壤地球化学特征及其找矿预测  

Soil Geochemical Characteristics and Ore Prospecting Prediction in Gaojianzi Area,Northern Hebei Province

作　　者：梁鸣 高文 罗先熔 王晓东[2] 刘秀娟 陈皓 刘攀峰 竹峰 李伟[2] LIANG Ming;GAO Wen;LUO Xianrong;WANG Xiaodong;LIU Xiujuan;CHEN Hao;LIU Panfeng;ZHU Feng;LI Wei(Guilin University of Technology,College of Earth Sciences,Institute of Concealed Mine Prospecting,Guilin,Guangxi 541006,China;The Fourth Geological Team of Hebei Bureau of Geology and Mineral Resources,Chengde,Hebei 067000,China;514 Brigade of North China Geological Exploration Bureau,Chengde,Hebei 067000,China)

机构地区：[1]桂林理工大学地球科学学院隐伏矿床预测研究所,广西桂林541006 [2]河北省地矿局第四地质大队,河北承德067000 [3]华北地质勘查局五一四地质大队,河北承德067000

出　　处：《现代地质》2023年第6期1567-1579,共13页Geoscience

基　　金：国家自然科学基金项目(42203067);广西科技计划青年基金项目(2022GXNSFBA035548,2021JJA150037);广西高校中青年教师科研基础能力提升项目(2022KY0261)

摘　　要：高尖子地区位于内蒙古—大兴安岭褶皱系棋盘山中凹陷构造单元内,是冀北重要的成矿地段。区域内第四系覆盖较厚,且当前找矿详查工作开展较少。为了提取有效成矿信息并应用于找矿靶区优选圈定,本研究在该地区开展1:1万土壤地球化学测量工作,对Au、Ag、Bi、Cu、Pb、Zn、Sb、Mo和Mn共9种代表性金属元素含量特征进行统计分析。研究结果发现Au、Ag和Mo元素为研究区内成矿有利元素。运用R型聚类分析对9种元素进行分类处理,划分出Cu-Zn-Mn、Au-Pb-Bi、Sb-Mo和Ag共4组元素组合。采用累频法计算单元素异常下限,并对单元素异常进行成图处理。运用规格化面金属量来评价单元素异常参数特征,并圈定了4处异常靶区和2处异常重点查证区。在异常重点查证区内利用土壤地球化学剖面进行异常查证,圈定2处成矿有利部位。经槽探工程验证,发现4条金银矿体。证明利用土壤地球化学测量能够在研究区提取有效的找矿信息。The Gaojianzi area is located in the Inner Mongolia-Great Khingan fold system within the Qipanshan middle depressional tectonic units,and is an important metallogenic area in northern Hebei Province.Quaternary sediments in the area are relatively thick,and previous exploration work is rare.To extract mineralization information and apply it to the optimization and delineation of prospecting targets,we conducted a 1:10,000 soil geochemical survey in the area,and statistical analysis on the composition of nine representative ore-related elements,i.e.,Au,Ag,Bi,Cu,Pb,Zn,Sb,Mo,and Mn.Our results show that Au,Ag,and Mo are favorable for local mineralization.The R-type cluster analysis was applied to classify the nine elements,and four element assemblages,i.e.,Cu-Zn-Mn,Au-Pb-Bi,Sb-Mo and Ag,were classified.The cumulative frequency method is used to calculate the lower limit of single element anomaly and map the single element anomaly.The normalized areal productivity is used to evaluate the characteristics of single element anomaly parameters,and four anomaly targets and two key anomaly verification areas are delineated.In the anomaly target,the soil geochemical profile is used to verify the anomaly and delineate two favorable mineralization locations.Four gold and silver orebodies were found through the verification of trenching engineering.We suggest that useful prospecting information can be extracted from the study area with soil geochemical survey.

关 键 词：土壤地球化学测量 元素异常特征 规格化面金属量 找矿预测 金银矿体 高尖子地区 

分 类 号：P632.1[天文地球—地质矿产勘探] P595[天文地球—地质学]