世界核地质科学2025，Vol.42Issue(6)：1210-1226,17.DOI:10.3969/j.issn.1672-0636.2025.06.006
便携式XRF在塔木素砂岩型铀矿矿石类型快速识别中的应用
Application of portable XRF in rapid identification of ore types in the Tamusu sandstone-hosted uranium deposit
摘要
Abstract
Sandstone-type uranium deposits are generally products of supergene oxidizing fluids.However,recent exploration in several uranium deposits of eastern China has revealed the involvement of deep-sourced fluids within ore-bearing sandstones and their spatial association with mineralization.How to identify such deep fluid activity—especially rapidly and effectively under field conditions—remains a key challenge in the study and exploration of sandstone-type uranium deposits.The Tamusu deposit in the Yin'e Basin exhibits pronounced modification by both supergene and deep fluids,leading to diverse ore types and debated genetic interpretations.This study focuses on ore-type identification in the Tamusu deposit and aims to establish rapid field markers through integrated macroscopic observations,pXRF analyses,and micro-scale mineralogical characterization.Field logging,continuous pXRF core scanning,and microscopy-SEM-EDS analyses were employed to systematically compare color,occurrence,diagnostic elements,and mineralogical features of different ore types.The results show that gray ores occur mainly in oxidation-reduction transition zones,enriched in U-Mo-As-S,and are characterized by pyrite and organic matter indicative of reducing conditions.Purplish-red ores occur within faults and oxidized zones,display strong enrichment in U-P-Ca-Sr-Y-Th,and host uranium predominantly in microcrystalline apatite,accompanied by hematitization and varying degrees of hydrothermal alteration.Based on macroscopic structures,fluid characteristics,and sandbody distribution,the ores can be classified into supergene gray uranium ores and deep-fluid-related U-P-rich purplish-red ores,from which a set of integrated macro-micro identification criteria was established.This study provides new insights into the interplay between shallow and deep fluids in forming sandstone-type uranium deposits in Tamusu and similar basins in eastern China.Moreover,the combined use of continuous pXRF core scanning and macroscopic observation demonstrates strong applicability in field settings,offering a rapid and effective approach for recognizing uranium mineralization and alteration types.关键词
便携式X射线荧光光谱/砂岩型铀矿/银额盆地/塔木素/矿石识别Key words
portable X-ray fluorescence spectrometer/sandstone-type uranium deposit/Yingen-Ejin basin/Tamusu/ore identification分类
天文与地球科学引用本文复制引用
FU Yukun,ZHANG Chengyong,LIU Bo,LIU Xu,LI Haixiao,SHI Beibei..便携式XRF在塔木素砂岩型铀矿矿石类型快速识别中的应用[J].世界核地质科学,2025,42(6):1210-1226,17.基金项目
铀资源探采与核遥感全国重点实验室项目(编号:NKLUR-2024-YB-004)、中国铀业有限公司—东华理工大学核资源与环境国家重点实验室联合创新基金项目(编号:2023NRE-LH-05)、天然铀产业技术创新联合体"揭榜挂帅"项目(编号:202301)和国家自然科学基金项目(编号:42062008)联合资助 Supported by the State Key Laboratory of Uranium Resources Exploration and Mining and Nuclear Remote Sensing(No.NKLUR-2024-YB-004),the China Uranium Co.,Ltd.-ECUT Joint Innovation Fund of the State Key Laboratory of Nuclear Resources and Environment(No.2023NRE-LH-05),the Natural Uranium Industry Technology Innovation Consortium"Jie Bang Gua Shuai"Project(No.202301),and the National Natural Science Foundation of China(No.42062008). （编号:NKLUR-2024-YB-004）
