基于模糊证据权与信息量的隐伏矿体三维预测:以山西罗框研究区为例  

Three-dimensional prediction of concealed ore based on fuzzy weights of evidence and information contents:a case study in Luokuang area in Shanxi province

作　　者：张权平 陈建平[1,2] 胡彬[1,2] 朱月琴[3,4] ZHANG Quanping;CHEN Jianping;HU Bin;ZHU Yueqin(School of Earth Sciences and Resources,China University of Geosciences(Beijing),Beijing 100083,China;Beijing Key Laboratory of Development and Research for Land Resources Information (China University of Geosciences(Beijing)),Beijing 100083,China;Key Laboratory of Geological Information Technology of Ministry of Land and Resources,Beijing 100037,China;Development and Research Center,China Geological Survey,Beijing 100037,China)

机构地区：[1]中国地质大学(北京)地球科学与资源学院,北京100083 [2]北京市国土资源信息开发研究重点实验室(中国地质大学(北京)),北京100083 [3]国土资源部地质信息技术重点实验室,北京100037 [4]中国地质调查局发展研究中心,北京100037

出　　处：《中国矿业》2018年第7期171-177,共7页China Mining Magazine

基　　金：国土资源部公益性行业科研专项项目资助(编号:201511079);国家重点研发计划项目资助(编号:2017YFC0601502)

摘　　要：山西浑源罗框研究区位于吕梁-太行断块的五台块隆之恒山-五台山穹状隆起北缘,区内构造发育,岩浆活动强烈,成矿地质条件有利。通过对基础地质资料的整理收集,在综合分析梳理成矿地质背景基础上,利用Surpac软件,以罗框矿区地表地质体界线、实测地质剖面与钻孔数据为基础,辅以图切勘探线,构建三维地质实体模型,定量提取有利控矿要素,建立找矿预测模型。利用模糊证据权法圈定成矿远景区,利用找矿信息量法进行级别划分,共圈定找矿预测区3处,计算找矿模型精度并通过专家打分法对预测结果评价,得出找矿概率为47.10%,结果表明罗框地区有一定的找矿潜力,后期应重视已知矿体Au3矿体深部断裂交汇处及Au2东南边部的重点勘查。Luokuang area is located at the northern edge of Hengshan-Wutaishan mountain domal uplift in Wutai platform uprise of Lvliang-Taihang massif.The structure is developed and the magmatic activity is strong.The metallogenic geological conditions are favorable.Based on the collection of basic geological data and the comprehensive analysis of metallogenic geological conditions,the 3D geological model and prospecting prediction model is established by Surpac with the data of surface geological boundary lines,geological sections and drills supplemented by geologic map cross-sections and the quantitative extraction of ore-controlling factors.The prospecting perspective area is circled by fuzzy weights of evidence method and 3 prospecting targets are circled and classified by information contents method.Prediction results are evaluated by export evaluation method after calculating the prospecting model and then get the probability of prospecting is 47.10%.The study results show that the Luokuang area has considerable prospecting potential and attention should be paid to the faults cross area in deep area of known ore body Au 3 and the south-eastern border area of Au 2 in the study area.

关 键 词：三维地质建模 模糊证据权 找矿信息量 成矿预测 罗框矿区 

分 类 号：P62[天文地球—地质矿产勘探]