云南新平米底莫铁铜矿成矿机理及找矿标志  

Metallogenic Mechanism and Prospecting Criteria of Midimo Iron-copper Deposit in Xinping,Yunnan

作　　者：黄绍明[1] HUANG Shaoming(Yuxi Mining Corporation Limited)

机构地区：[1]玉溪矿业有限公司

出　　处：《现代矿业》2024年第5期31-35,共5页Modern Mining

摘　　要：米底莫铁铜矿床位于红河断裂与绿汁江断裂的三角区域,是不同时期构造-岩浆运动和变质作用的产物。为探索米底莫铁铜矿床成矿规律,在总结区域成矿背景、矿床地质特征的基础上,对矿化规律及控矿因素进行分析总结。研究表明:矿区出露早元古代大红山群,上覆晚三叠统盖层,总体为浅—中等变质的钠质火山岩系,其中大红山群曼岗河组是主要的含矿层位;矿区继承了区域构造-岩浆特征,火山喷发中心为火山气液、后期热液叠加部分,火山岩厚度自喷发中心往外逐渐减小,矿床富集程度也随之降低;区内大红山群岩系经受了浅—中等程度的区域变质作用,变质矿物主要为角闪石、绿帘石、铁铅榴石、黑云母等,并伴随着硅化、绢云母化、电气石化、钠长石化等围岩蚀变;矿床具有严格的成矿专属性,并受控于火山活动中心、火山喷发-沉积旋回及地质构造,邻近的火山机构及相似的地层岩性和近矿围岩蚀变可作为有力的找矿标志。The Midimo iron-copper deposit is located in the triangle area of the Red River fault and the Luzhijiang fault,which is the product of tectonic-magma movement and metamorphism in different peri⁃ods.In order to explore the metallogenic regularity of the Midimo iron-copper deposit,the mineralization reg⁃ularity and ore-controlling factors are analyzed and summarized on the basis of summarizing the regional metallogenic background and geological characteristics of the deposit.The research shows that the early Pro⁃terozoic Dahongshan Group is exposed in the mining area,overlying the late Triassic caprock,and the over⁃all is a shallow-medium metamorphic sodium volcanic rock series,in which the Manganghe Formation of the Dahongshan Group is the main ore-bearing layer.The mining area inherits the regional tectonic-magmat⁃ic characteristics.The volcanic eruption center is the superposition part of volcanic gas-liquid and later hy⁃drothermal fluid.The thickness of volcanic rock gradually decreases from the eruption center to the outside,and the enrichment degree of the deposit also decreases.The Dahongshan Group rock series in the area has undergone shallow-moderate regional metamorphism.The metamorphic minerals are mainly hornblende,ep⁃idote,iron-lead garnet,biotite,etc.,and are accompanied by silicification,sericitization,electrical petro⁃chemical,albite and other surrounding rock alterations.The deposit has strict metallogenic specificity and is controlled by volcanic activity center,volcanic-eruption sedimentary cycle and geological structure.Adja⁃cent volcanic edifices,similar stratigraphic lithology and near-ore wall rock alteration can be used as favor⁃able prospecting indicators.

关 键 词：铁铜矿 成矿规律 控矿因素 找矿标志 

分 类 号：P618.41[天文地球—矿床学]