新疆阿尔泰山南缘多金属成矿带的成矿规律  

Metal logeny of Polymetallic Metal logenic Belts on the Southern Margin of the Altay Mountains, Xinjiang,China

作　　者：叶庆同[1] 傅旭杰[1] 王保良[2] 

机构地区：[1]中国地质科学院矿床地质研究所,北京100037 [2]国土资源部地质矿产调查局,北京100812

出　　处：《地质学报》1998年第4期349-357,共9页Acta Geologica Sinica

基　　金：国家305项目的85-902-01课题

摘　　要：泥盆纪时,在阿尔泰山南缘拉张背景下,北西向区域性断裂和北北东向同生断裂的发育和复合,为火山喷发、潜火山岩分布和裂谷海水下渗循环创造了条件。伴随构造演化形成了两个构造-岩浆-成矿带。其中,一个成矿带是以与流纹-英安质火山活动有关的沉积岩型铅锌、(铁)多金属矿床(可可塔勒式)为特征,另一个成矿带是以与细碧-角斑质火山活动有关的火山岩型铜锌矿床(阿舍勒式)为特征。火山盆地、同生断裂和潜火山岩体顶部裂隙带控制了不同形式矿化。从裂谷边缘向中心,具有Fe→Pb-Zn,(Fe)-Cu-Pb-Zn→Cu-Zn矿化分布模式。The development and compounding of NW-trending regional faults and NNE-trending contemporaneous faults in the extensional setting on the southern margin of the Altay Mountains created conditions for volcanic eruption, subvolcanic intrusion and downward percolation and circulation of rift seawater. Along with the tectonic evolution two tectono-magmatic-metallogenic belts were formed: one is characterized by the occurrence of sedimentary lead-zinc-(iron) poly-metallic deposits related to rhyolitic-dacitic volcanic activity (Keketale type), and the other by the occurrence of volcanic-type copper-zinc deposits related to bimodal volcanic activity (Ashele type). Volcanic depressions, contemporaneous faults and fissure zones at the top of the subvolcanic bodies control different forms of mineralization. From the borders towards the centre of the rift, there exists a mineralization zonation of Fe→Pb-Zn, (Fe)-Cu-Pb-Zn→Cu-Zn.

关 键 词：成矿条件 成矿规律 阿尔泰山 多金属矿床 成矿带 

分 类 号：P618.205[天文地球—矿床学]