巴音戈壁盆地构造演化及其对砂岩型铀矿成矿的控制作用  

Tectonic Evolution Characteristics of Bayingebi Basin and Its Control on the Mineralization of Sandstone Type Uranium Deposits

作　　者：张成勇[1] 聂逢君[1] 侯树仁[2] 王俊林[2] 邓薇[1] 张良[2] 

机构地区：[1]东华理工大学放射性地质与勘探国防重点学科实验室,江西南昌330013 [2]核工业208大队,内蒙古包头014010

出　　处：《铀矿地质》2015年第3期384-388,412,共6页Uranium Geology

基　　金：国家自然科学基金项目(40972067);东华理工大学放射性地质与勘探国防重点学科实验室开放基金项目(2011RGET01)联合资助

摘　　要：巴音戈壁盆地位于哈萨克斯坦、西伯利亚、塔里木与中朝板块交接部位,受长期活动的走滑断裂构造控制。笔者将巴音戈壁盆地中生代以来的构造演化分为三叠纪-侏罗纪拉分盆地发生、早白垩世拉分盆地全面发展、晚白垩世沉降拗陷和第三纪以来挤压抬升等4个阶段。以塔木素砂岩型铀矿为例,讨论了该盆地构造演化与铀成矿的关系,指出其断陷盆地构造格局控制着沉积相带的发育,构造反转有利于控矿断裂的形成,有利于层间氧化带发育和铀的活化迁移。在此基础上,指出了下一步的找矿方向。Bayingebi basin is located in the joint part among Kazakhstan, Siberia, Tarim plate and Sino Korean plate and controlled by a long active strike strip fault. This paper divided the Mesozoic tectonic e- volution of the basin into four stages： foster age of Triassic - Jurassic pull - apart basin, Early Cretaceous pull - apart stage of comprehensive basin development, Late Cretaceous subsidence depression stage and compressional uplift stage since Tertiary. Tamusu sandstone type uranium deposit was discussed as a case to show the relationship between structural evolution and uranium metaUization, and the strucruai inversion was found to be favourable for the development of sedimentary facies and the thermal reaction and mobilization of uranium. Finaly, direction of next step prospecting was pointed out.

关 键 词：塔木素 构造演化 构造反转 走滑断裂 砂岩型铀矿 

分 类 号：P613[天文地球—矿床学]