铀矿冶2026，Vol.45Issue(1)：58-67,10.DOI:10.13426/j.cnki.yky.2025.03.08
偏镭矿段对伽马测井解释和铀镭平衡修正结果的影响
Impact of Ra-rich Section on Gamma Logging Interpretation and Uranium-Radium Equilibrium Correction Results
姚益轩 1吴童盼 1杜志明 1邹玉涵 1胥国龙 1李星浩1
作者信息
- 1. 核工业北京化工冶金研究院,北京 101149
- 折叠
摘要
Abstract
Gamma logging is the fundamental method for quantitatively determining uranium content of mineralized intervals in boreholes.The U-Ra equilibrium in a certain sandstone-hosted uranium depos-it has been severely disrupted.To investigate the impact of Ra-rich sections(mineralized intervals where the equivalent uranium grade derived from radium is ≥0.010 0％but the uranium grade is＜0.010 0％)on log interpretation and U-Ra equilibrium correction results,the uranium and radium content analysis results of permeable ore samples were systematically studied.The results show that:for samples with a uranium grade≥0.010 0％,the weighted average uranium grade is 0.042 7％,the weighted average U-Ra equilibrium coefficient is 0.615,and the coefficient of variation is 1.041;for samples with an equivalent uranium grade derived from radium≥0.010 0％,the weighted average ura-nium grade is 0.029 5％,the weighted average U-Ra equilibrium coefficient is 0.890,and the coeffi-cient of variation is 3.785.Ra-rich sections will significantly increase the deposit's U-Ra equilibrium coefficient,increase the orebody thickness,and decrease the deposit's uranium grade.Gamma logging cannot identify and remove Ra-rich sections.Consequently,neither the log interpretation results nor the U-Ra equilibrium correction results objectively reflect the orebody's spatial position,grade and thickness.The estimated resource quantity is also inaccurate.关键词
砂岩型铀矿/原地浸出/伽马测井/偏镭矿段/铀镭平衡/统计学Key words
sandstone-type uranium deposit/in-situ leaching/gamma logging/Ra-rich section/urani-um-radium equilibrium/statistics分类
矿业与冶金引用本文复制引用
姚益轩,吴童盼,杜志明,邹玉涵,胥国龙,李星浩..偏镭矿段对伽马测井解释和铀镭平衡修正结果的影响[J].铀矿冶,2026,45(1):58-67,10.
