吉木乃县塔斯特岩体地质地球化学特征及含矿性评价  

GEOLOGICAL AND GEOCHEMICAL CHARACTERISTIES OF TASITE ROCK BODY OF JIMUNAI AND ITS ORE BEARING EVALUATION

作　　者：周刚[1] 

机构地区：[1]新疆地质矿产勘查开发局第四地质大队,新疆阿勒泰836500

出　　处：《新疆地质》2000年第1期79-84,共6页Xinjiang Geology

摘　　要：塔斯特岩体由石英闪长岩、英云闪长岩、二长花岗岩和钾长花岗岩组成。岩石均具有高Ｎａ低Ｋ，Ｎａ２Ｏ、Ｆｅ２Ｏ３、Ｈｆ、Ｋ／Ｒｂ偏高，Ｋ２Ｏ、ＣａＯ、ＦｅＯ、Ｒｂ、Ｓｒ、Ｎｂ、ＲＥＥ、δ１８Ｏ、Ｏ、Ｒｂ／Ｓｒ明显偏低的特点。岩石化学和地球化学特征表明该岩体为形成于火山弧环境的“Ｉ”型花岗岩。岩体中Ａｕ、Ａｇ、Ａｓ、Ｂｉ、Ｃｕ等成矿元素明显富集，并与该岩体中金矿床、矿点的元素组合一致，说明该岩体与Ａｕ的成矿关系密切。岩体及其外接触带应为寻找金、铜矿产的有利部位。The Tasite rock body consists of quartz diorite, quartz-mica-diorite, monzogranite and potassium granite. The rock has a obvious character of high Na and low K,the Na2O,Fe2O3,Hf and K/Rb are tend to high value, while the K2O,CaO, FeO,Rb,REE,δ18O and Rb/Sr are tend to low.The petrochemical and geochemical characteristics indicate that the rock is 'I'type granite which was formed in a volcanic arc background.The elements of An,Ag,As,Bi,Cu in the rock are enriched.Such an element assemblage is identical to the gold deposit and occurences of the rock body, which indicates the rock body is closely related to the gold metallogenesis.The rock body and its external contact belts are the farourable parts for gold and copper prospecting.

关 键 词：新疆 塔斯特 岩体 地球化学 含矿性 成矿 

分 类 号：P588.121[天文地球—岩石学]