世界核地质科学2024，Vol.41Issue(1)：12-22,11.DOI:10.3969/j.issn.1672-0636.2024.01.002
伽马能谱测井在罗辛铀矿勘查中的应用研究
Study on the application of spectral γ logging in Rössing uranium deposit
摘要
Abstract
Domestically,gross gamma-ray well log,coupled with certain amount of core assay validation,is used as the basic method for the uranium resource estimation for years,which needs a variety of correction,such as iron,mud as well as disequilibrium of uranium-radium.Thorium as an'interference'to uranium measurement is mandatory to be deducted correctly from gross gamma.Rössing uranium deposit is a kind of leucogranite-type uranium deposit.Tons of history core assay results show that the Th/U ratio varies along with the ore body strike and dip,as well as with alteration and lithology.Either Th/U constant method or function fitting based on the statistics of core assay analysis is generally applied to deduct thorium from gross gamma log in Rössing deposit.However,spectral gamma-ray logging can be directly used to probe the concentration of radium and thorium of the mineralization section.This paper illustrated the spectral gamma-ray technique to be reliable and of credibility,in the aspects of instrument,field data probing,error analysis between uranium concentration of spectral gamma-ray logging and thorium-corrected uranium content of gross gamma-ray logging,and reconciliation between uranium concentration computed by spectral gamma-ray log and core assay.It was believed that the spectral gamma-ray well logging is more fast and effective than that of gross gamma-ray logging,particularly applicable to the hydrothermal hard-rock uranium prospecting.关键词
铀矿勘查/铀-钍混合型矿床/伽马能谱测井/岩(矿)心分析Key words
uranium exploration/hydrothermal hard-rock uranium deposit/spectral gamma-ray well logging/core assay reconciliation分类
天文与地球科学引用本文复制引用
焦仓文,冯延强,王恒,潘自强..伽马能谱测井在罗辛铀矿勘查中的应用研究[J].世界核地质科学,2024,41(1):12-22,11.基金项目
受中核集团集中研发项目(编号:物SD03-02)资助 Supported by China National Nuclear Corporation(No.物SD03-02) （编号:物SD03-02）
