铀矿地质2025，Vol.41Issue(5)：786-798,13.DOI:10.3969/j.issn.1000-0658.2025.41.054
松辽盆地北部三兴地区四方台组沉积特征及其与铀成矿关系研究
Sedimentary Characteristics and Uranium Metallogenic Conditions of Sifangtai Formation in Sanxing Area,Northern Songliao Basin
摘要
Abstract
In recent years,multiple uranium anomalies have been identified in the first and second members of the Sifangtai Formation in the Sanxing area of the northern Songliao Basin,indicating significant potential for sandstone-hosted uranium mineralization in this region.In order to further understand the relationship between the uranium mineralization and the sedimentary characteristics of the Sifangtai Formation in the study area,this study integrates core observation,single-well facies analysis,sedimentary facies analysis of multi-wells profiles,and the distribution characteristics of sand bodies to reconstruct the sedimentary facies of the first and second members of the Sifangtai Formation.The results show that the study area is characterized by a braided river-meandering delta sedimentary system with the primarily sourced from the north and northeast and supplementary input from the northwest.Uranium mineralization in the first member of the Sifangtai Formation is mainly found in multi-rhythmic sand bodies formed by the superposition of multiple river channels.In the second member,uranium mineralization occurs in two settings:areas where sand content decreases from high to low on both sides of the river channels,and interfluve regions of the river channels.These findings suggest that the development characteristics of sedimentary subfacies significantly influence the distribution range of uranium mineralization anomalies in the area.Furthermore,the analysis indicates that the Sifangtai Formation in the study area bears favorable lithofacies,structural,and post-depositional oxidative alteration conditions for sandstone-hosted uranium mineralization,has great potential for uranium exploration.关键词
沉积特征/沉积微相/铀成矿/四方台组/松辽盆地Key words
sedimentary characteristics/sedimentary microfacies/uranium mineralization/Sifangtai Formation/Songliao Basin分类
天文与地球科学引用本文复制引用
徐宝石,罗敏,侯晓光,吴大坤,赵星博,楼仁兴..松辽盆地北部三兴地区四方台组沉积特征及其与铀成矿关系研究[J].铀矿地质,2025,41(5):786-798,13.基金项目
中国核工业地质局项目"黑龙江省林甸—富裕地区铀矿资源调查评价"(编号:202212-8)和松辽盆地北部编图与选区项目(编号:202411-4)联合资助. （编号:202212-8）
