中新生代盆地深部地质流体及铀成矿作用

随着在哈萨克斯坦楚·萨雷苏盆地坎茹甘、莫英库姆、托尔特库杜克等砂岩型铀矿中发现了成矿溶液(热流体)来自深源的地质证据后,伴随着中新生代盆地后期次造山作用的活化改造,深源热流体在砂岩型铀矿成矿中的重要性越发显现出来。文章简述了中新生代盆地地质流体的来源与性质,归纳了盆地流体的3种类型和运移方式,总结了盆地深源热流体铀成矿的主要特征,并就我国北方中新生代盆地可能存在的深部地质流体及铀成矿作用进行了探讨,以期在勘查工作中开拓视野、创新思路、实现找矿新的突破。

Deep Geofluid and Uranium Metallogenesis in Meso-Cenozoic Basin

With the discovery of depth origin evidence of mineralization solution (hot fluid) in the Sandstone uranium deposit of Kanru Gan,Mo Kum and Tortkuduk in Chusarysu basin of Kazakhstan,and the facts of later remobilization and transformation in Cenozoic and Mesozoic basins,the significance of deep sources hot fluids in the procedure of sandstone type uranium mineralization in Cenozoic and Mesozoic basin have been gradually recognized.This article roughly introduced the source and nature of geological fluids in Cenozoic and Mesozoic basin,and summarized three type fluid and their transformation method,as well the main feature of uranium mineralization by deep source hot fluid injection.The article also discussed the possibility of deep geofluid action to uranium mineral1zation in Meso-Cenozoic basin in North China.