西天山金、铜矿地质特征简述

西天山是我国古生代造山带重要的金、铜矿成矿单元之一，具有Au、Cu地球化学场.各种地球物理场也显示具有良好的金、铜矿成矿地质背景.金、铜矿主要生成于海西期的构造岩浆地质热事件中，形成了浅成低温热液型和韧性剪切带型金矿以及海底火山喷气热水沉积型、矽卡岩型、斑岩型、陆相火山热液充填型铜矿.可划分出赛里木铜金成矿带、吐拉苏也里莫墩金成矿带、察布查尔铜成矿带及胜利达坂金成矿带.主要矿床有阿希金矿、望峰金矿、喇嘛苏铜矿和预须开普台铜矿.

GEOLOGICAL CHARACTERISTICS OF THE GOLDCOPPER DEPOSITS IN WESTERN TIANSHAN

Western Tianshan,standing for the north branch of the western section of Tianshan Mountains in China,belongs to Tarim plate,induding Sailim massif,Boluokenu Early Paleozoic island arc belt and Yili Late Paleozoic rift.The area is one of the most significant AuCu mineralization unit within Paleozoic orogenic belt in China.The geochemical and geoph ysical fields indicate a well Au Cu mineralizing background.The Au Cu deposits were formed mainly in Hercynian,tectonicmagmatic geothermal events,as epithermal type and ductile shear zone type of gold deposits,and submarine volcanic exhalationhydrothermal sedimentary type,skarn type,porphyry type and continental volcanic hydrothermal filling type of copper deposits.Five mineralizing belts are delineated,which are Sailim CuAu mineralizing belt,TulasuYelimodun Au mineralizing belt,Chabuchar CuAu mineralizing belt,Awulale Cu mineralizing belt and Shenglidaban Au mineralizing belt.Main deposits are Axi gold deposit,Wangfeng gold deposit,Lamasu copper deposit and Yuxukaiputai copper deposit.