摘要
在充分总结前人资料的基础上,笔者通过分析鄂尔多斯盆地西南缘下白垩统铀成矿地质背景,讨论了对砂岩型铀矿成矿具有重要影响的铀源、构造改造、含矿地层、水文地质、古气候及后生蚀变等条件,认为铀成矿主要受铀源、地层岩性结构、构造演化、古气候和后生蚀变等关键因素控制。盆地西南缘具有丰富的铀源,找矿目的层发育有利的构造建造,构造-沉积-古气候演化阶段造就了氧化斜坡带找矿目的层的发育,使盆地西南缘具备了较好的铀成矿地质条件。
On the basis of fully integration of existed research achievement, this paper analyzed the geological setting of uranium mineralization and discussed metallogeni cconditions such as uranium sources, structure reforming, ore-bearing stratigraphy, hydrogeology, paleo-climate and epigenic alterations. The sandstone type uranium metallogenesis is regarded as mainly controlled by the key factors such as uranium sources, lithologic composition of strata, evolution of structure and paleoclimate, epigenic alterations, etc. It was believed that there are abundant uranium sources, well developed prospecting target layer, beneficial lithologic combination structure, and favorable paleoclimate evolution and epigenic alterations conditions in the southwester margin of the basin. In generally, there are favorable geological conditions for sandstone type uranium resources in the southwest margin of Ordos basin.
作者
张字龙
范洪海
贺锋
刘鑫扬
李卫红
李亚锋
衣龙升
杨梦佳
贾翠
ZHANG Zilong;FAN Honghai;HE Feng;LIU Xinyang;LI Weihong;LI Yafeng;YI Longsheng;YANG Mengjia;JIA Cui(Key Laboratory of Uranium Exploration and Evaluation Techniques,CNNC,Beijing Research Institute of Uranium Geology,Beijing 100029,China;Bureau of Geology,CNNC,Beijing 100013,China;Research Institute No.203,CNNC,Xicmyang,Shaanxi 712000,China)
出处
《铀矿地质》
CAS
CSCD
2018年第4期193-200,共8页
Uranium Geology
基金
中核集团集中研发项目“鄂尔多斯盆地南部砂岩型铀矿关键因素识别与靶区优选”(编号:地LTD1601-3)
中国核工业地质局项目“鄂尔多斯盆地南缘铀成矿地质特征与远景评价”(编号:201586)
国家重点基础研究发展计划“973”项目(编号:2015CB453004)
中核集团青年科技创新团队项目(编号:地HQX1601)
关键词
鄂尔多斯盆地西南缘
砂岩型铀矿
下白垩统
成矿地质条件
控矿因素
southwest margin of Ordos basin
sandstone type uranium deposits
lower Cretaceous
geological conditions of metallogenesis
ore controlling factors
