青藏高原碰撞隆升与中国西北及中亚邻区砂岩铀成矿作用  

Collision-uplift evolution of Qinghai-Tibetan Plateau and sandstone-hosted Uranium metallogeny in Northwest China and its adjacent Central Asia region

作　　者：李子颖[1] 郭强[1] 秦明宽[1] 蔡煜琦[1] 郭建[1] LI ZiYing;GUO Qiang;QIN MingKuan;CAI YuQi;GUO Jian(Beijing Research Institute of Uranium Geology,Beijing 100029,China)

机构地区：[1]核工业北京地质研究院,北京100029

出　　处：《矿床地质》2024年第6期1336-1359,共24页Mineral Deposits

基　　金：国家重点基金项目“砂岩型铀矿含矿灰色砂体成因研究”(编号:U2341292);中核集团基础项目“红杂色岩系砂岩铀矿多层板状矿体成因研究”联合资助。

摘　　要：青藏高原碰撞隆升是现今地学界最热门的研究课题之一,其演化过程在中国西北部及邻区中亚形成了独特的沉积盆地和山脉体系,且在形成的中新生代沉积盆地产生了世界著名的砂岩型铀矿集中区,探明的铀资源量以百万吨计。文章研究探讨了青藏高原碰撞隆升与中国西北及中亚邻区盆山形成过程和特点、对沉积盆地建造响应和改造影响,构造沉积演化与砂岩铀矿形成的关系,阐述了不同类型砂岩铀矿的特点和模式、砂岩铀成矿事件、时空分布规律。青藏高原碰撞隆升演化对砂岩铀矿形成具有重要的制约作用,中亚地区受青藏高原隆升的远程效应,构造活动相对较弱,形成大规模砂岩铀矿,且深度较浅,浅层的砂岩型铀矿是勘查的重点。中国环青藏高原造山带受影响较大,浅部和深部砂岩型铀矿均是下一步勘查的方向和目标。The collision uplift and evolution of the Qinghai-Tibetan Plateau is one of the most popular research topics in geosciences nowadays.The evolution process of the collision uplift of the Qinghai-Tibetan Plateau has formed a unique sedimentary basin and mountain system in the Northwest of China and its neighboring region in Central Asia.In the Mesozoic and Cenozoic sedimentary basins the world-famous sandstone-type uranium megaprovince was formed,and the discovered uranium resources reached million tons.This paper deals with the relationship between the collision-uplift evolution of the Qinghai-Tibetan Plateau and the formation process and characteristics of the basin-mountain system in Northwest China and the adjacent region of Central Asia,the formation response and transformation of sedimentary basins,the structural evolution and the formation of sandstone-type uranium deposits as well.The characteristics and models of different types of sandstone-hosted uranium deposits,uranium metallogenic events,and spatial and temporal distribution are expounded.The collision-uplift evolution of the Qinghai-Tibetan Plateau has an important constraint on the formation of sandstone-type uranium deposits.Due to the Qinghai-Tibet Plateau uplift remote effect,the tectonic activity in Central Asia is relatively weak,a large scale of sandstone-hosted uranium mineralization happened in relatively shallow depth,and shallow sandstone type uranium deposits are the focus of exploration.The orogenic belt around the Qinghai-Tibet Plateau in China is strongly affected by the collision-uplift of the Qinghai-Tibetan.Both shallow and the deep-buried sandstone-type uranium deposits are the next exploration targets.

关 键 词：碰撞隆升 砂岩铀矿 沉积盆地 青藏高原 中亚地区 

分 类 号：P619.14[天文地球—矿床学]