东天山金铜成矿背景与成矿系统分析  

ANALYSIS ON GOLD AND COPPER OREFORMING SETTING WITH ORE-FORMING SYSTEM OF EASTERN TIANSHAN

作　　者：杨兴科[1] 程宏宾[1] 姬金生[1] 罗桂昌[1] 陶洪祥[1] 

机构地区：[1]西安工程学院地球科学系,陕西西安710054

出　　处：《西安工程学院学报》2000年第2期7-14,共8页Journal of Xi'an Engineering University

基　　金：九五国家科技攻关项目资助! (95 91 6 0 5 0 4)

摘　　要：根据东天山金铜矿带不同单元按构造 -岩石地层划分原则 ,石炭系分出有序和无序两套地层岩石组合和生物组合 ,两个构造 -火山活动带和两个古陆边缘成矿系统。碰撞造山与韧性剪切带强时空耦合 ,岛弧火山岩成带分布 ,杂砂岩形成于塔里木陆缘岛弧边缘 ,碰撞花岗岩呈中小型东西成带分布 ,地球化学分省分区。构造演化呈多阶段 (分 12个阶段 ) ,碰撞造山细分 3阶段 6期 ,金铜成矿时代以海西中晚期 ( 2 90～ 2 30Ma)为主 ,不同古陆边缘成矿系统其成矿类型、特征等均不相同 。According to tectonostratigraphical division principle, the different units in gold and copper oreforming belt of eastern Tianshan are divided into order and disorder two typical stratumrock assemblages, two tectonovolcanic activity belts and two oreforming system of paleocontinental margin. The collision orogeny and ductile shear zone have strong spacetime coupling. The island arc volcanic rock is distributed in zoning.Graywacke is formed on the edge of island arc in the north part of Tarimu continent. Collision granites are distributed in eastwest belting with middlesmall type. There are geochemical part and geochemical province. There are multistage features of tectonic evolution, which can be divided into 12 stages. The collision orogeny can be detailed classfied three stages and six developped phases.Gold and copper oreforming time is mainly in midlate Hercynian epoch(290～230?Ma).Different oreforming system of palecontionental miargin have different metallogenic types and characteristics.Direction of prospecting for gold and copper deposits are put forward. [

关 键 词：成矿背景 构造岩石组合 金矿床 铜矿床 

分 类 号：P618.510.5[天文地球—矿床学] P618.410.5[天文地球—地质学]