滇东北大型矿集区乐红大型铅锌矿床矿化蚀变分带模式  

The Mineralization and Alteration Zoning of the Le-hong Lead Zinc Deposit,the Large Deposit Concentration Area in the Northeast of Yunnan Province,China

作　　者：赵冻 韩润生[1,2] 任涛[1,2] 王加昇[1,2] 张小培[1,2] 吴永涛[1,2] 崔峻豪[1,2] 

机构地区：[1]昆明理工大学国土资源工程学院,昆明650093 [2]有色金属矿产地质调查中心西南地质调查所,昆明650093

出　　处：《矿物岩石地球化学通报》2016年第6期1258-1269,共12页Bulletin of Mineralogy, Petrology and Geochemistry

基　　金：国家自然科学基金项目(U1133602;41572060);中国地调局整装勘查综合研究项目(12120114013901);云岭学者项目(2014);云南省矿产资源预测与评价重点工程实验室开放项目(2012);昆明理工大学创新团队项目

摘　　要：乐红铅锌矿是滇东北铅锌矿集区的典型矿床,为查明其矿化蚀变特征,应用大比例尺蚀变岩相学填图方法,对比研究了不同中段不同矿(化)体的特征和蚀变特征,并以1290m中段为例剖析了矿化蚀变的组成、类型及结构等。结果显示,该矿床的围岩蚀变有热液白云石化、方解石化、硅化和黄铁矿化,矿化以闪锌矿化、方铅矿化为主,并据此建立了乐红矿床矿化蚀变岩相分带模式:矿化边缘带(Ⅰ)→矿化过渡带(Ⅱ)→矿化中心带(Ⅲ),对应的矿物组合为Dol+Cal+Py、Dol+Cal+Py+Qt+Sp(少)和Dol+Cal+Py+Qt+Sp+Gn。此模式的建立对同类矿床与川滇黔接壤区的找矿预测具有重要的指导意义。The Lehong lead-zinc deposit is one of the typical deposit of the lead-zinc deposit concentrated district in north-east Yunnan.In order to evaluate the mineralization and alteration of the deposit,large scale alteration petrography map-ping has been used to investigate the composition,type and texture of alteration of middle section of deposit at 1290m level and compare the geological feature and alteration of different ore bodies.Alteration types of the deposit include hydro-thermal dolomitization, calcilization, silicification, pyritization.Mineralization is mainly composed of sphalerite and galena.On the basis of mapping results,we establish the alteration zoning of the Lehong deposit：The marginal zone of mineralization （Ⅰ）→the transitional zone of mineralization （Ⅱ）→the central zone of mineralisation （Ⅲ）,with corre-sponding mineral association of Dol＋Cal＋Py、Dol＋Cal＋Py＋Qt＋Sp and Dol＋Cal＋Py＋Qt＋Sp＋Gn,respectively.The altera-tion zoning is common in Sichun-Yunnan-Guizhou contiguous area so that it could be used as guide for exploration.

关 键 词：矿化蚀变分带模式 成矿规律 乐红铅锌矿床 滇东北矿集区 

分 类 号：P618.4[天文地球—矿床学]