西天山地区浅成低温热液型金矿地质特征及成矿模式  

The geochemical characteristics and ore-forming model of the epithermal gold deposit in West Tianshan Mountains

作　　者：沙德铭[1] 董连慧 毋瑞身[3] 田昌烈[3] 贾斌[3] 

机构地区：[1]东北大学资源与土木工程学院,辽宁沈阳110006 [2]新疆地质勘查局,新疆乌鲁木齐830000 [3]沈阳地质矿产研究所,辽宁沈阳110033

出　　处：《西北地质》2003年第2期50-59,共10页Northwestern Geology

基　　金：国家科技攻关项目(85-902-04-01);(96-915-03-06);地质大调查项目(199910200218)

摘　　要：新近发现于西天山吐拉苏地区的阿希大型金矿床及其外围的伊尔曼得、恰布坎卓它等金矿床(点)的矿化类型为浅成低温热液型,并进一步划分为冰长石-绢云母型和硅化岩型。矿床赋存于伊犁晚古生代裂谷区的吐拉苏—也里莫墩火山岩带中,矿床围岩为下石炭统大哈拉军山组中基性—中酸性陆相火山岩系。冰长石-绢云母型以阿希金矿为代表,矿床为沿火山口缘环状、放射状断裂充填的石英脉型;硅化岩型以伊尔曼得金矿为代表,矿化体呈层状、似层状,受火山岩系底部沉火山碎屑岩控制。结合该地区成矿地球化学特征分析,本文讨论了区内金矿成矿特征、成矿背景和成矿条件,建立了西天山地区浅成低温热液型金矿的成矿模式。Axi gold deposit and its peripheral ore deposits Yiermande, Qiabukanzuota, which formed in Late Paleozoic volcanic rocks in West Tianshan Mountains, are considered as epithermal mineralizing type,and divided furtherly into adularsericite type and silicated rock type The gold deposits are formed in TulasuYelimodun volcanic belt of Yili Late Paleozoic rift And the country rocks of the gold deposit are continental intermediateacid volcanic eruptive rock series of Dahalajunshan formation(C1d) and corresponding subvolcanic bodies which belong to limealkalialkali series association Axi gold deposit considered as the representative of the adularsericite type was controlled by volcanostructures and the main ore bodies were quartz vein type filling in ringlike fault near craterAnd it is lowtemperature and lowpressure feature by its ore texture and mineral assembladgeYiermande gold deposit considered as the representative of the silicated rock type was controlled by the sedimentary volcanic rocks of the lower part of Dahalajunshan formation and its ore bodies are layer and layerlike So by analyzing the metallogenogeochemical characteristics of the ore deposits,the authors discuss the settings,conditions and the characteristics of the gold deposit and set up its oreforming model with epithermal characteristics

关 键 词：浅成低温热液型金矿 冰长石—绢云母型 硅化岩型 成矿模式 阿希金矿 伊尔曼得金矿 西天山地区 

分 类 号：P611[天文地球—矿床学]