Roles of Multisourced Fluids in the Formation of Sandstone-Hosted Uranium Deposits in the SW Songliao Basin, NE China

作     者：Zhibing Feng Fengjun Nie Li Jiang Fei Xia Jianfang Cai Bocheng Zhang Yayun Lu Liangliang Zhang Zhibing Feng;Fengjun Nie;Li Jiang;Fei Xia;Jianfang Cai;Bocheng Zhang;Yayun Lu;Liangliang Zhang

作者机构：State Key Laboratory of Nuclear Resources and EnvironmentEast China University of TechnologyNanchang330013China Jiangxi Engineering Laboratory on Radioactive Geoscience and Big Data TechnologyEast China University of TechnologyNanchang330013China Radioactive Geology and Exploration Technology LaboratoryEast China University of TechnologyNanchang330013China No.243 Geological PartyChina National Nuclear CorporationChifeng024000China Airborne Survey and Remote Sensing Center of Nuclear IndustryChina National Nuclear CorporationShijiazhuang050002China 

出 版 物：《Journal of Earth Science》 (地球科学学刊（英文版）)

年 卷 期：2023年第34卷第1期

页      面：54-69页

核心收录：

学科分类：081803[工学-地质工程] 08[工学] 0818[工学-地质资源与地质工程] 

基　　金：supported by the National Natural Science Foundation of China (Nos. U2067202, 41772068, 42172098) the Natural Science Foundation of Jiangxi Province (No. 20202BAB213017) the Joint Innovation Fund of China Uranium Industry Co., LTD and East China University of Technology (No. NRE2021-02) Open Foundation of State Key Laboratory of Nuclear Resources and Environment (No. JELRGBDT202007) 

主　　题：sandstone-hosted uranium deposit hydrothermal fluid uranium mineralization Songliao Basin kaolinite carbonate minerals 

摘      要：The sandstone-hosted uranium deposits in the SW Songliao Basin differ from typical sandstone-hosted uranium deposits in terms of the geological features of the ore-deposits,including the geometry of the orebodies,mineral assemblage and *** drill core and microscopic observations,scanning electron microscopy(SEM),electron microprobe analysis(EMPA),heavy mineral concentrates,and fluid inclusion studies of the Upper Cretaceous Yaojia Formation,i.e.,the uranium-bearing layer,were integrated to investigate the roles of hydrothermal fluids in the formation of these uranium *** found that the kaolinite alteration is developed in the mineralized zones,but it is less common in the peripheral *** fluid inclusions are hydrothermal fluids with a medium-low temperature(67 to 179 ℃) and a high salinity(5.9 wt.% to 20.1 wt.%).According to the analyses,three kinds of hydrothermal fluids,i.e.,the acid fluid,the groundwater heated by the mafic magma,and the alkaline fluid rich in Ca^(2+) and CO_(3)^(2-),were *** fluids might have low U content,but they have participated in the formation of the uranium deposits *** formed by the acid-hydrothermal fluid absorbed large amounts of ***,the thermal energy from the hydrothermal fluids changed the intrastratal redox environment and increased the solubility of the uranium minerals in the *** alkaline-hydrothermal fluid rich in Ca^(2+) and C0_(3)^(2-) facilitated the formation of stable Ca-U(Ⅵ)-CO_(3) complex,which led to the enrichment of soluble uranium in solution,and final precipitation as pitchblende,brannerite and Ti-bearing uranium minerals in the uranium ores.