铀矿地质2025，Vol.41Issue(5)：735-756,22.DOI:10.3969/j.issn.1000-0658.2025.41.051
松辽盆地南部姚家组下段地球化学特征及其与铀成矿关系
Geochemical Characteristics of the Lower Member of Yaojia Formation in Southern Songliao Basin and Its Relationship with Uranium Mineralization
摘要
Abstract
Study of sediment geochemical characteristics plays an important role in the analysis of sediment provenance,tectonic setting and uranium mineralization.In this paper,a detailed geochemical characteristic study was carried out by systemly sampling the sand body in the lower member of Yaojia Formation in typical boreholes in Dalin-Hailijin area.The results showed that the sandstone in Dalin-Hailijin area was mainly feldspar sandstone,containing a small amount of lithic sandstone.Rrare earth elements in the sandstone of the lower member of Yaojia Formation are characterized by the enrichment of light rare earths,the relative loss of heavy rare earths,and the moderate europium negative anomaly.Discriminant diagram of main and trace series of the sandstone in lower member of Yaojia Formation in Dalin-Hailijin area show that the sand body was formed in semi-humid to semi-arid environment,and the source rock was a recycled felsic volcanic rock,which had undergone weak-moderate weathering.Compared with the source area of the basin periphery,it was considered that the magmatic rocks and volcanic rocks of Hercynian and Yanshan periods in the southern segment of the Daxing'an Mountains to the western of the basin were the main sources.The comprehensive study shows that the uranium mineralization of the sand body in Dalin and Hailijin area is different from the typical interlayer oxidation zone uranium deposits,the uranium mineralization in Dalin-Hailijin area may be modified by low-temperature hydrothermal fluids in the later stage.关键词
铀矿化/地球化学/姚家组下段/大林地区/海力锦地区Key words
uranium mineralization/geochemistry/the lower member of Yaojia Formation/Dalin area/Hailijin area分类
天文与地球科学引用本文复制引用
马树松,唐国龙,宁君,张亮亮,贺航航,何乐昌..松辽盆地南部姚家组下段地球化学特征及其与铀成矿关系[J].铀矿地质,2025,41(5):735-756,22.基金项目
中国核工业地质局项目"松辽盆地通辽-大庆地区铀矿资源调查评价与勘查"(编号:2022-12)和"松辽盆地大林—海力锦地区赋矿砂体空间展布与铀成矿规律研究"(编号:202411-6) （编号:2022-12）
铀资源探采与核遥感全国重点实验室(东华理工大学)开放基金项目"松辽盆地大林砂岩型铀矿床微生物白云石的成因与铀成矿关系研究"(编号:2024QZ-KF-02)联合资助. （东华理工大学）
