内蒙古鄂尔格地区矿化蚀变、地球化学异常特征及找矿前景  

Mineralization alteration,geochemical anomalous characteristics and prospecting prospects in Erge Region,Inner Mongolia

作　　者：武葆源 聂世嘉 Wu Baoyuan;Nie Shijia(514 Brigade of North China Geological Exploration Bureau;Jining Land Spatial Data and Remote Sensing Technology Center)

机构地区：[1]华北地质勘查局五一四地质大队 [2]济宁市国土空间数据和遥感技术中心

出　　处：《黄金》2023年第5期73-77,共5页Gold

基　　金：内蒙古自治区地质勘查基金项目(NMKD2012-28)。

摘　　要：鄂尔格地区位于西伯利亚板块南东缘增生带的乌尔其汉火山型被动陆缘,得尔布干断裂北西侧的中段,区域上处于北东向中蒙古—额尔古纳成矿带的北东段,与邻近的甲乌拉银铅锌矿床和额仁陶勒盖银矿床等成矿地质条件类似。通过对鄂尔格地区成矿地质背景、矿化蚀变及地球化学异常特征等综合研究,采用1∶1万土壤地球化学测量及探槽等对1∶5万综合异常AS8进行查证,探获了矿化带和矿体,取得了找矿突破。综合分析认为,酸性火山岩为进一步寻找银多金属矿的有利地段,鄂尔格地区具备形成与中生代酸性火山岩及后期脉岩有关的中低温热液型、脉型银金多金属矿的潜力。The Erge Region is located on the Wuerqihan volcanic passive continental margin on the accretion zone of the southeast margin of the Siberian plate,the middle section of the northwest side of the Derbugan fault.Regionally,the region is located in the northeast section of the NE metallogenic belt of Central Mongolia-Erguna,and the ore-forming geological conditions are similar to those of the adjacent Jiawula Silver Lead Zinc Deposit and Erentaolegai Silver Deposit.Based on the comprehensive study of the metallogenic geological background,mineralized alteration,and geochemical anomalous characteristics in this region,1∶10000 soil geochemical survey and trenching are used to verify the 1∶50000 comprehensive AS8,resulting in prospecting breakthrough,including mineralization belt and ore body find.The comprehensive analysis takes that acidic volcanic rocks are favorable spots for further prospecting of silver polymetallic deposits,and that Erge Region possesses the potential of the formation of medium-low temperature hydrothermal,vein type silver polymetallic deposits related to Mesozoic acidic volcanic rocks and late-phase dikes.

关 键 词：鄂尔格地区 银多金属 矿化 蚀变 地球化学 找矿前景 

分 类 号：TD15[矿业工程—矿山地质测量] P618.52[天文地球—矿床学]