内蒙古蘑菇气盆地火山岩型铀矿化特征及成矿预测

Characteristics of volcanic uranium mineralization and metallogenic prediction in the Moguqi basin,Inner Mongolia

蘑菇气盆地处于大兴安岭火山岩带中段,位于扎兰屯火山岩型铀成矿远景带内,构造发育,火山热液活动强烈,铀矿化异常线索丰富,铀成矿地质条件优越。通过对区内典型铀矿点(751)矿化特征分析,铀矿化主要受中酸性火山岩、构造复合控制,与绿泥石化、高岭土化、碳酸盐化、硅化、黄铁矿化、褐铁矿化等热液蚀变关系密切。结合地质、航放、遥感等资料,对盆地内铀成矿条件进行了分析,对铀成矿远景进行了预测,预测二级铀成矿远景区1片、三级铀成矿远景区3片,为进一步铀矿找矿工作提供了参考。

The Moguqi basin is located in the middle section of the Daxinganling volcanic rock belt. It is located in the volcanic rock type uranium mineralization prospecting belt of Zhalantun,with tectonic development,strong volcanic hydrothermal activity,abundant uranium mineralization anomalies and superior uranium metallogenic geological conditions. Through analysis of the mineralization characteristics of typical uranium deposits (751) in the area,uranium mineralization is mainly controlled by medium-acid volcanic rocks and structural,and is closely related to hydrothermal alterations such as chloritization,kaolinization,carbonation,silicification,pyritization and limonitization. Based on the geological,aeronautical,and remote sensing data,the uranium metallogenic conditions in the basin were analyzed,and the prospects for uranium mineralization were predicted. 6 uranium mineralization prospects were predicted,including one piece of II prospects,three pieces of Ⅲ prospects,It provides a reference for further uranium ore prospecting work.