铀矿地质2025，Vol.41Issue(2)：197-214,18.DOI:10.3969/j.issn.1000-0658.2025.41.015
松辽盆地南部陆家堡凹陷四方台组沉积特征及铀成矿条件分析
Sedimentary Characteristics and Uranium Metallogenic Condition of Sifangtai Formation in Lujiapu Depression,Southern Songliao Basin
摘要
Abstract
Due to the low exploration level of Sifangtai Formation in the Lujiabu depression,the potential for sandstone-type uranium deposit is still undetermined.Through a comprehensive study and analysis of the characteristics of the uranium deposit belt in Lujiabu depression,the microscopic observation of rock cores,the analysis of grain size of sandstone,the characteristics of lithology-logging facies and the distribution of sedimentary facies in the vertical and horizontal directions,it was concluded that Sifangtai Formation sandstone type was predominantly quartzose feldspathic sandstone and quartz sandstone.The primary sedimentary facies was alluvial fan,which extended across the entire study area and encompassed sub-facies corresponding to the fan root,middle section,and terminus.Furthermore,nine distinct microfacies were identified.This paper elucidated the pattern and constraining factors of uranium mineralization from three perspectives:The microscopic mineral constraints on uranium mineralization within uranium-bearing sand bodies;The influence of sedimentary facies on the vertical and horizontal distribution of uranium mineralization belts;The spatial coupling relationship between sand bodies and sand content in relation to uranium mineralization.Finally,four prospective exploration areas had been identified:the Jiaogeng area,the northwestern sector of Jianhua,and both the western and eastern sectors of Kailu,which is of significant reference for uranium exploration activities in the Lujiabu depression and the Songliao Basin.关键词
四方台组/沉积特征/砂岩型铀成矿/成矿预测/陆家堡凹陷Key words
Sifangtai Formation/sedimentary characteristics/sandsone-type uranium/metallogenic prediction/Lujiapu depression分类
地质学引用本文复制引用
佟术敏..松辽盆地南部陆家堡凹陷四方台组沉积特征及铀成矿条件分析[J].铀矿地质,2025,41(2):197-214,18.基金项目
中国核工业地质局项目"松辽盆地通辽-大安地区铀矿资源调查评价与勘查"(编号:202210)和"内蒙古奈曼旗八仙筒-开鲁县建华地区铀矿资源调查评价"(编号:202210-2)联合资助. （编号:202210）
