云南茂租铅锌矿床地质地球化学特征及成矿机制探讨  

DISCUSSIONON GEOLOGICALAND GEOCHEMICAL CHARACTERISTICS AND METALLOGENIC MECHANISM OF MAOZU LEAD-ZINC DEPOSIT,YUNNAN PROVINCE

作　　者：坚润堂 孙玉海 王崇军 段鹏 田章武 李俊刚 JIAN Run-tang;SUN Yu-hai;WANG Chong-jun;DUAN Peng;TIAN Zhang-wu;LI Jun-gang(Baise University,Baise 533000;Kunming Prospecting Design Institute of China Nonferrous Metals Industry Co.,Ltd.,Kunming 650051)

机构地区：[1]百色学院,广西百色533000 [2]中国有色金属工业昆明勘察设计研究院有限公司,云南昆明650051

出　　处：《云南地质》2023年第4期474-483,共10页Yunnan Geology

基　　金：云南澜沧铅矿有限公司科技计划项目(LCQKZY(2019)022)。

摘　　要：茂租铅锌矿床主要发育3个矿体(群),主矿体呈层状、似层状。闪锌矿、方铅矿和黄铁矿δ^(34) S值介于+8.84‰~19.86‰,富集重硫,表明硫主要来源于海相硫酸盐热化学还原;Pb同位素组成较均一,投点主要落入基底Pb同位素组成范围内,暗示其来源单一或混合均匀,成矿主要来源于昆阳群和会理群基底岩石。结合区域铅锌矿床地质地球化学特征,川滇黔地区铅锌矿床赋存在不同时代地层中,成矿流体性质颇为相似,推测该区铅锌矿床形成于同一时期,成矿与均一化流体的贯入有关。The Maozu lead-zinc deposit is mainly composed of three ore bodies(groups),and the main ore body is stratiform orstratoid.Theδ^(34) S valuesof sphalerite,galena,and pyrite range from+8.84‰to 19.86‰,enriched in heavy sulfur,indicating that sulfur mainly comes from the thermochemical reduction of marine sulfates;The Pb isotope composition is relatively uniform,and mainlyplotted within the area of Pb isotope composition of the basement,indicating a single or uniformly mixed source of the ore-forming materials from the basement rocks of the Kunyang and Huiliformations.Based on the geological and geochemical characteristics of regional lead and zinc deposits,as well as the fact that lead and zinc deposits in the Sichuan Yunnan Guizhou region occur in strata of different eras,but are quite similar in ore-forming fluid properties,the lead and zinc deposits in this area were supposed to be formed during the same period,and the mineralization is related to the penetration of homogenized fluids.

关 键 词：地球化学 S、Pb同位素 成矿物质来源 成矿机制 茂租铅锌矿 云南巧家 

分 类 号：P618.42[天文地球—矿床学] P618.43[天文地球—地质学]