内蒙古东部下阿特勒克地区地球化学特征及斑岩型钼矿找矿前景

Geochemical Characteristics and Prospecting Prospects of Porphyry Molybdenum Deposits in the Lower Atluck Area of Eastern Inner Mongolia

通过1∶5万和1∶1万土壤测量发现内蒙古东部下阿特勒克地区有明显的近东西向展布的Mo、Ag、Au等元素异常带,其异常幅值强、分布范围广。经查证后发现区内多处见石英二长斑岩出露,斑岩体中石英脉发育,沿石英脉两侧硅化、钾化等蚀变强烈,特别是Mo异常与石英二长斑岩体出露位置对应良好,围绕斑岩体由近及远具有从高温至低温热液的Mo—Ag—(As、Sb)元素异常分带特征。在成矿有利地段进行槽探揭露验证,显示工作区内寻找斑岩型钼矿的潜力较大。

Through soil measurements of 1∶50,000 and 1∶10,000,it is found that there are obvious anomalous bands of Mo,Ag,Au and other elements in the lower Atluck area of eastern Inner Mongolia,with strong amplitude and wide distribution.After verification,it is found that there are many quartz monzonite porphyry outcrops in the area.The quartz veins in the porphyry body are developed,and the silicification and potassium alteration along the two sides of the quartz vein are strong.Especially,the Mo anomaly corresponds to the location of the quartz monzonite porphyry body.The Mo-Ag(As,Sb)element anomaly zoning characteristics from high temperature to low temperature hydrothermal fluid around the porphyry body from near to far.The trenching and excavation verification in favorable areas for metallization shows that the working area has great potential to find porphyry molybdenum deposits.