新疆伊吾县阿克萨依金矿地质特征及远景预测

伊吾县阿克萨依金矿是在伊吾县马依当阿克萨依地区发现的一种新型矿床。文章通过对区域成矿地质背景的调查和研究,结合马依当阿克萨依金矿的地质特征,总结该地区的成矿规律与控矿因素。据已有资料初步认为:早期发生脆韧剪切,金初始富集,为金成矿矿源之一,华力西中期石英闪长岩及后期变质作用为金成矿提供深部矿源和热源。近北西西向的一系列叠瓦状断裂构造和岩体与围岩接触带附近的空隙,构成矿物迁移和聚集场所。该矿在东天山造山带地区具有代表性,初步预测在阿克萨依及其外围地区有3个靶区。该类型金矿的发现,对今后在该区找矿具有一定的指导意义。

Geologic Features and Long- range Forecast on the Akeshayi Gold Deposit, Yiwu County, Xingjiang

The Akeshayi gold deposit is a new type in discovery in the area of Akeshayi,Yiwu County.Through surveying and studying minerogenetic setting regionally,in combination with geologic characteristics at the Akeshayi gold deposit,the mineralized regularities and ore controlling factors are summed up.The data available indicate that brittle and ductile shear occurred during early stage,initially originating the gold in concentration which is one of gold source in mineralization,the quartz diorites in the middle of Variscan and its metamorphism during late stage supply minerals source and thermal at deep for gold deposit.A series of nearly NWW imbricate fault structures and cavities in the vicinity of wall-rock contact constitute the rooms in transmission and concentration.This deposit is representative in the districts of orogenic belts in the eastern Tianshan Mountain,there are three target districts by initiative forecast at Akeshayi and its outskirts.Discovery of this type of gold deposit is significant for guidance of prospecting at this area.