新疆库地地区蛇绿岩含金性研究

GOLD CONTENTS OF OPHIOLITE IN THE KUDI AREA, XINJIANG

新疆库地蛇绿岩堆积厚度达１ ５００ ｍ 以上，主要岩石由纯橄岩、斜辉橄榄岩、辉长岩、块状玄武岩、枕状玄武岩、玄武安山岩、硅质岩、粉砂岩等组成。岩石化学和稀土元素分析表明蛇绿岩形成于洋盆环境，通过微量元素分析，金的背景值高（２０ ×１０ － ９） ，Ａｕ 与Ｃｕ 、Ｍｇ、ＴＦｅ 正相关，与Ｋ２Ｏ、Ｓｒ 负相关，探讨了该蛇绿岩带的含矿（ 金）

The ophiolite is composed of dunite, peridotite, gabbro, massive basalt, pillow basalt, basaltic andesite, silicalite and siltstone with thickness of over 1500 m. The lithochemistry and REE analysis indicate that it was formed in marine basin. It features high background value of Au (20×10-9), its positive correlation to Cu,Mg,TFe, and its negative correlation to K 2O and Sr. Finally, its contents of Au and the potential types of gold mineralization are inquired into.