滇东北茂租铅锌矿床地质特征及成矿机制

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英文篇名：Metallogenic Mechanism and Geological Characteristics of Maozu Lead-zinc Deposit in Northeast Yunnan Province 作者：彭一 ; 吴云辉 英文作者：Peng Yi;Wu Yunhui;Kunming Prospecting Design Institute of China Nonferrous Metals Industry Co.,Ltd.; 关键词：铅锌矿床 ; 矿床地质特征 ; 成矿机制 英文关键词：Lead-zinc deposit;;Metallogenic geological characteristics;;Metallogenic mechanism 中文刊名：KYKB 英文刊名：Modern Mining 机构：中国有色金属工业昆明勘察设计研究院有限公司; 出版日期：2019-04-25 出版单位：现代矿业 年：2019 期：v.35;No.600 基金：“十一五”国家科技支撑计划项目(编号:2006BAB01B05) 语种：中文; 页：KYKB201904011 页数：4 CN：04 ISSN：34-1308/TD 分类号：46-49

摘要

茂租铅锌矿床总体位于扬子板块西缘的昆阳裂谷东缘,是川滇黔Pb-Zn多金属成矿域上滇东北矿集区的大型矿床。阐述了成矿地质背景、矿床地质特征,深入研究了赋矿层位与矿化规律,厘定了矿床成因机制。研究表明:①矿区继承了区域地质特征,出露地层丰富,矿(化)体主要赋存于上震旦统灯影组中,含矿岩性为白云岩;②矿区构造格局复杂,以NE向断裂控矿作用最为显著,次级断裂构造对矿化有着富化作用;③矿床发育似层状、脉状及不规则状3种矿(化)体,其中似层状矿体产状稳定、形态规则、规模厚大,赋存于背斜轴部/翼;④赋矿地层、围岩岩性、矿区褶皱构造及派生的次级构造(羽状裂隙)是富集成矿的关键因素,矿床总体属上层矿、下层矿及脉状矿"三位一体"的热水—沉积型矿床。
        Maozu Lead-zinc Deposit is located in the eastern margin of Western Yangtze Para-platform,which is a large deposit of northeast Yunnan ore-concentrating area in Sichuan-Yunnan-Guizhou Pb-Zn metallogenic province.Based on the previous study results,the metallogenic geological background geological characteristics of the deposit,the ore-occurred strata are analyzed,the metallogenic regularity is discussed,besides that,the deposit mechanism is studied.The study results show that:①Maozu mining area has inherited the regional geological characteristics,the outcrop layer is abundant,the orebodies(mineralized bodies) are occurred in Dengying Formation of Upper Sinian,and the ore-bearing rock is dolomite;②the tectonic framework of the mining area is complex,orebodies are strictly controlled by north-east structures,the secondary faults have enrichment effect on mineralization;③the deposit developed three kinds of orebody(mineralization),including stratiform-like orebody,vein orebody and irregular orebody,the stratiform-like orebody has occurred in axis/alar part,which characterized by stable occurrence,regular morphology and thick-large scale,and the orebody has occurred anticlinal shafts/wings;④the ore-hosting strata,surrounding rock lithology,fold structure and secondary tectonic(plumose fractures) are the significant ore-controlling factors,which proved that Maozu Lead-zinc Deposit belongs to the trinity hydrothermal-sedimentary type deposit.

引文

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