中国含铀沉积盆地类型与铀成矿特征  

Uraniferous Sedimentary Basin Type and Metallogenic Characteristics in China

作　　者：李胜祥 张字龙[2] 刘红旭[2] 丁波[2] LI Shengxiang;ZHANG Zilong;LIU Hongxu;DING Bo(China Nuclear Uranium Co.,Ltd.,Beijing 100013,China;Beijing Research Institute of Uranium Geology,Beijing 100029,China)

机构地区：[1]中核铀业有限责任公司,北京100013 [2]核工业北京地质研究院,北京100029

出　　处：《铀矿地质》2023年第5期727-742,共16页Uranium Geology

基　　金：中国核工业地质局地质科研项目“甘蒙地区砂岩型铀矿综合编图与选区”(编号:202118);“北方中新生代盆地砂岩铀矿新一轮战略选区”(编号:地D2204);“铀矿重点勘查区勘查成果进展跟踪与动态评价及勘查部署建议”(编号:地D2219)联合资助。

摘　　要：文章根据盆地形成的地球动力学构造环境、盆地所处大地构造位置及其基底结构,将中国含铀沉积盆地划分为裂谷型盆地、前陆盆地、挤压挠曲盆地、山间盆地和走滑拉分盆地等5种类型。在分析各类型含铀沉积盆地地质特征的基础上,总结了各类型含铀沉积盆地的铀成矿特征;提出裂谷型盆地、前陆盆地以及山间盆地等3类中-新生代沉积盆地是我国地浸砂岩型铀矿找矿最有利的沉积盆地,也是今后我国地浸砂岩型铀矿的主要找矿方向;挤压挠曲盆地的铀矿找矿在我国已经取得重要进展,其找矿前景十分广阔;走滑拉分盆地的地浸砂岩型铀矿成矿条件相对较弱,但因其常常叠加热液改造成矿作用,其找矿前景还是值得探索的。In this paper,according to the geodynamic tectonic environment,tectonic location and basement structure of the basins,the uraniferous sedimentary basins in China were classified into five types:rift basin,foreland basin,compressive flexural basin,intermontane basin and strike-slip pull-apart basin.On the basis of analyzing the geological characteristics of uraniferous basins,the uranium metallogenic characteristics of each type uraniferous basin was summarized.Three types Mesozoic and Cenozoic sedimentary basins such as rift basin,foreland basin and intermontane basin,were proposed as the most favorable basins for prospecting in-situ leaching sandstone type uranium deposits in China and also the main prospecting directions for in-situ leaching sandstone type uranium deposits in the future.Since important progress on uranium prospecting in compressive flexural basins has been achieved in China,prospecting prospect in this type was believed very broad.The metallogenic conditions of the in-situ leaching sandstone type uranium deposit in the strike-slip pull-apart basins was regarded relatively weak,but uranium mineralization of hydrothermal reworking is worth exploring because of the superposition mineralization.

关 键 词：含铀沉积盆地分类 盆地特点 铀成矿特征 

分 类 号：P619.14[天文地球—矿床学]