内蒙古三道桥铅锌矿床地质特征及成因探讨  

Geological characteristics and genesis of sandaoqiao lead zinc deposit in Inner Mongolia

作　　者：党顺安 王亚洲 吕勃 吴远静 DANG Shun-an;WANG Ya-zhou;LV Bo;WU Yuan-jing(Genhe senxin Mining Development Co.,Ltd,Genhe 022300,China;Xianyang northwest nonferrous metals 712 Corps Co.,Ltd,Xianyang 712000,China)

机构地区：[1]根河市森鑫矿业开发有限责任公司,内蒙古根河022300 [2]咸阳西北有色七一二总队有限公司,陕西咸阳712000

出　　处：《世界有色金属》2022年第6期114-116,共3页World Nonferrous Metals

摘　　要：三道桥铅锌矿床位于中国东北部大兴安岭北部海拉尔-根河中生代火山盆地北西缘得尔布干成矿带中北段。赋矿地层为中侏罗世塔木兰沟组凝灰岩、安山岩及火山碎屑岩中。北东向得耳布干深大断裂为矿区的主要的断裂,具有多期活动的特征。矿体受NW-NWW向的次级断裂控制,形态多呈不规整的脉状、透镜状和细脉浸染状。矿石矿物主要为方铅矿、闪锌矿、黄铁矿,其次为黄铜矿、黝铜矿和辉银矿等。围岩蚀变主要包括硅化、绢云母化、绿泥石化和碳酸盐化,其中硅化和绢云母化与矿化关系最为密切。综合前人研究,三道桥铅锌矿床与燕山期-构造岩浆活动密切相关,燕山期强烈的岩浆活动为成矿提供了充足的热能、挥发分及成矿物质。得尔布干深大断裂及其派生的NW-NNW向次级断裂为岩浆-热液的运移提供通道,并为矿液的就位提供空间。Sandaoqiao lead-zinc deposit is located in the middle and northern part of Derbugan metallogenic belt on the northwest edge of Hailar Genhe Mesozoic volcanic basin in the north of Daxinganling,Northeast China.The ore bearing strata are tuff,andesite and pyroclastic rocks of the Middle Jurassic Tamulangou formation.The NE trending Deerbugan deep fault is the main fault in the mining area,with the characteristics of multi-stage activity.The ore body is controlled by secondary faults in nw-nww direction,and the shape is mostly irregular vein,lens and veinlet disseminated.Ore minerals are mainly galena,sphalerite and pyrite,followed by chalcopyrite,tetrahedrite and silver pyroxene.Wall rock alteration mainly includes silicification,sericitization,chloritization and carbonation,among which silicification and sericitization are most closely related to mineralization.Based on previous studies,sandaoqiao lead-zinc deposit is closely related to Yanshanian tectonic magmatism.The strong magmatism in Yanshanian provided sufficient heat,volatile and metallogenic materials for mineralization.Derbugan deep fault and its derived nw-nnw secondary fault provide a channel for the migration of magma hydrothermal solution and space for the emplacement of ore solution.

关 键 词：三道桥铅锌矿 地质特征 矿床成因 得尔布干成矿带 

分 类 号：P618.4[天文地球—矿床学]