铀矿地质2024，Vol.40Issue(3)：377-393,17.DOI:10.3969/j.issn.1000-0658.2024.40.034
松辽盆地南部保康地区钻孔铀矿化地球化学特征及意义
Geochemical Characteristics of Borehole Uranium Mineralization and Its Significance in Baokang Area,Southern Songliao Basin
摘要
Abstract
Songliao Basin is one of the Middle Cenozoic continental sedimentary basins in China,this paper focuses on the study of the lower member Yaojia Formation in Baokang area of Songliao Basin as the primary target layer.Geochemical and spectroscopic analyses were conducted to investigate the characteristics of major elements,trace elements,sulfur isotopes,and organic matter in the host sandstones so as to explore the uranium mineralization characteristics and ore-forming prospects in Baokang area.The analysis results show that the samples from mineralized section in Baokang area are depleted in Si and enriched in Fe,Mn,especially S and TOC.Trace elements associated with uranium are Co,Ni,Mo,Cd,Re,Tl,Zr,while Mo,Cd,and Re are more intensely enriched and show significant correlation with uranium.The δ34S values of the mineralized samples from the lower member Yaojia Formation in Baokang area range from-17.7‰ to-2.7‰,lower than those of sterile samples,indicating that the main source of sulfur in pyrite is from the thermal decomposition of organic matter.Spectroscopic characteristics suggest that the organic matter in the samples has a relatively high maturity and shares some similarities with humic acid,suggesting its evolution from deep hydrocarbon source rocks.Combining the uranium ore characteristics in geochemistry and organic matter,it was concluded that uranium mineralization in Baokang area conformed to the features of leaching sandstone-type uranium mineralization.关键词
砂岩型铀矿/地球化学/激光拉曼光谱/红外光谱/保康地区Key words
sandstone-type uranium deposit/geochemistry/Laser Raman spectroscopy/infrared spectroscopy/Baokang area分类
天文与地球科学引用本文复制引用
董守政,李子颖,蔡煜琦,刘军港,张云龙,贾立城..松辽盆地南部保康地区钻孔铀矿化地球化学特征及意义[J].铀矿地质,2024,40(3):377-393,17.基金项目
国家自然科学重点基金"砂岩型铀矿铀及伴生元素与有机质迁移富集机理"(编号:U2167210))和中核集团集中研发项目"第四代铀矿勘查关键技术研究与示范"(编号:中核科发2021-143号)联合资助. （编号:U2167210）
