伊盟和楚-萨雷苏两成矿区铀成矿大地构造模式对比  

Comparison of Tectonic Pattern Between Yimeng and Chu-Saleisu Uranium Metallogenic Regions

作　　者：姚振凯 刘翔 

机构地区：[1]核工业230研究所,湖南长沙410007 [2]湖南省核工业地质局,湖南长沙410011

出　　处：《铀矿地质》2015年第6期547-554,共8页Uranium Geology

摘　　要：伊盟和楚-萨雷苏两成矿区,是我国和哈萨克斯坦铀资源规模最大的成矿区,其铀成矿大地构造模式的最大共同点是都处在活化区,同属活化阶段大型自流水盆地,铀具多次成矿叠加作用;最大差别是富铀层位大地构造属性不同,铀成矿期构造活化强度有别。伊盟成矿区富铀层形成于活化阶段早期,岩性岩相变化较大,对形成大型层间氧化带有不利一面,但活化阶段多次强烈隆起,不整合面发育,在不整合面上的砂岩层内,存在有利形成大型层间氧化带的另一面。工业铀成矿作用产生于活化阶段中晚期,形成似层状、透镜状矿体为主的矿床。楚-萨雷苏成矿区富铀层位形成于地台阶段,有多个厚大富铀砂岩层,岩性岩相及厚度稳定;在活化阶段微弱构造作用形成的次造山带内,形成大型卷状体铀矿床。Yimen and Chu-Saleisu regions are the largest uranium metallogenic regions in China and Kazakhstan respectively.The biggest common features of the two region are both located in active tectonic background,with large-scale artesian basin,and developed multiple superimposed mineralization of uranium.They are quite different in the tectonic setting of uranium rich strata,and tectonic activation intensity during industrial uranium mineralization.In Yimen region,the rich-uranium strata were formed in the early stage of the activation which is changeable in rock types and unfavourable for the formation of large scale interlayer oxidation zone.The fairly active tectonic movement caused multi-phase uplift and the well developed interlayer oxidation zone between the unconformity of sandstone layer and brought the industrial uranium mineralization in the late stage of activation with the stratoid and lenticular orebody.In Chu-Saleisu region,the uranium rich strata were formed in the platform background with uranium rich sandstone layers of large and stable in spatial,lithologic and lithofacies distribution.Large volume uranium deposit was formed by the weakly tectonic activity effect in the suborogenic belt.

关 键 词：伊盟 楚-萨雷苏 铀成矿区 成矿大地构造 模式对比 

分 类 号：P612[天文地球—矿床学]