基于GIS的中条山铜矿成矿特征分析与定量预测  

GIS-based metallogenic characteristics analysis and quantitative prediction of the Zhongtiaoshan copper deposit

作　　者：李彩凤 Li Caifeng(Fujian Exploration Institute of Coalfield and Geology,Fuzhou 350005,Fujian,China)

机构地区：[1]福建省煤田地质局地质勘查院

出　　处：《地质学刊》2019年第3期469-480,共12页Journal of Geology

基　　金：国家重点基础研究发展计划“973”项目“华北克拉通前寒武纪重大地质事件与成矿”(2012CB416605);中国地质大学(北京)基本科研业务费专项资金资助项目(2652014086)联合资助

摘　　要：中条山铜矿集区位于华北克拉通南部,是我国重要的铜矿生产基地。中条山铜矿沿裂谷边界断裂带展布,新太古代末期—早中元古代经历了初始成矿期、沉积成矿期、区域变形变质成矿期和西阳河火山活动成矿期4个期次的富集作用,形成了复杂的成矿系统。在充分研究中条山成矿模式并分析成矿系统关键控矿因素的基础上,基于地质矿产空间数据库,以地质异常致矿理论为指导,采用GIS技术定量提取地层、构造、岩浆、地球物理和地球化学异常等多元综合找矿信息,建立中条山铜矿床资源定量预测评价模型;采用证据权重法对成矿预测因子进行赋值,根据后验概率值和成矿地质条件圈定了5个找矿远景区。研究成果为中条山区域矿产资源的进一步勘探和开发提供了依据。Located in the south of the North China Craton,the Zhongtiaoshan copper deposit is an important copper production area in China.The Zhongtiaoshan copper deposit spread along the rift boundary fault zone,and experienced four stages of the initial metallogenic period,sedimentary metallogenic period,regional deformation metamorphic metallogenic period and Xiyanghe volcanic activity metallogenic period from the late Neoarchean to the Early Middle Proterozoic.The four stages of enrichment formed a complex metallogenic system.On the basis of fully studying the Zhongtiaoshan metallogenic model and analyzing the key ore-controlling factors of its metallogenic system,based on the geological mineral resource database,guided by the ore-indicating geological anomaly theory,the paper established a quantitative prediction and evaluation model for the Zhongtiaoshan copper deposit by quantitatively extracting multi-dimensional comprehensive prospective information including strata,structure,magma,geophysical and geochemical anomaly using GIS technology.On top of that,it used the weights of evidence method to value the mineralization prediction factor,and delineated five ore-searching prospective areas by the comprehensive analysis of the posterior probability value and metallogenic geological conditions.The research provides a basis for further exploration and development of mineral resources in the Zhongtiaoshan area.

关 键 词：中条山铜矿 区域成矿模型 多元信息 成矿预测 证据权重法 找矿远景区 山西 

分 类 号：P612[天文地球—矿床学] P618.41[天文地球—地质学]