云南省会泽县麻栗坪铅锌矿床地质特征及成因研究.pdf

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1、第23卷第1O期中国矿业Vo1．23，No．102Ol4年1O月CHINAMININGMAGAZINEOct．2014地质找矿云南省会泽县麻栗坪铅锌矿床地质特征及成因研究贺胜辉，陈贤胜，荣惠锋(云南省有色地质勘查院，云南昆明650216)摘要：滇东北麻栗坪铅锌矿位于川、滇、黔铅锌成矿区之昭通一曲靖铅锌成矿带中部。矿体产于寒武系下统渔户村组含磷碳泥质白云岩与硅质白云岩、硅质岩的层间破碎带及其旁测羽状裂隙中，呈(似)层状、透镜状及脉状产出，具热水喷流沉积成矿特征，类似于Sedex型中的Irish型亚类成因类型，后期受晚

2、二叠世峨眉山玄武岩浆构造活动影响产生叠加改造；成矿元素与主量元素含量的统计学分析结果指示，含矿热液中碱质和铝质成分少有利于矿质的溶解和沉淀，硫对矿质溶解运移和沉淀具有重要促进作用，而铁质太多也可能会造成对矿化剂硫的争夺，含矿热液与碳酸盐岩围岩发生交代反应可能是导致矿质沉淀的关键作用过程；成矿元素与微量元素含量的统计学分析结果指示，本区铅锌成矿主要与热卤水沉积的中温热液成矿作用有关。关键词：麻栗坪；铅锌矿；矿床地质特征；矿床成因中图分类号：P611；P618．4文献标识码：A文章编号：1004—4051(2O14)1

3、0—0080—08Geologicalcharacteristicsandgenesisofthemalipingpb-zndepositintheHuizecounty，Yunnan，ChinaHESheng—hui，CHENXian-sheng，RONGHui—feng(YunnanInstituteofNonferrousMetalGeologicalSurvey，Kunmin650216，China)Abstract：MalipingPb—Zndepositis1ocatedinthenortheastin

4、YunnanProvince．andintheincentra1ofZhaotong—Qujinglead—zincmetallogenicbeltwhichbelongstoSichuan，Yunnan，andGuizhouleadzincmetallogenicprovince．TheorebodyoutputfromYuhucunformationinthelowerCambriandolomiteandsiliceousdolomitewithphosphorus，carbonandargillaceous

5、，interlayerfracturezoneandfeatherfracturesofsiliceousrock，whoseoutputformwaslayer，lenticular，andevein．Thereweremetallogeniccharacteristicsofhydrothermal—emanation-sedimentation，wassimilartotheIrish—typeoftheSedex-typeclass．Emeishanbasaltmagmaandtectonicactivit

6、iesimpactonthedepositandmadeitremouldedinlatePermian．Contentofore—formingelementsandthemajorelementsofstatisticalanalysisresultsindicate，intheore-bearinghydrothermalalkalilessconducivetothemineralandaluminumcomponents．0re—formingelementsandcontentofthemainelem

7、entsofstatisticalanalysisresultsindicate．1essalkalisandaluminumcomponentsintheore—bearinghydrothermalfluidisbenefitformineraldissolutionandprecipitation，toomuchironmayalsocausecompeteoccupymineralizersulfur．Metasomatismreactionbetweenorebearinghydrothermalandc

8、arbonaterockcouldbethekeyroleofmineralprecipitationprocess．Statisticalanalysisoftheore-formingelementsandtraceelementsshowthatPb—Znmineralizationinthisareamainlyisrelatewithwarmflu