世界核地质科学2025，Vol.42Issue(6)：1282-1290,9.DOI:10.3969/j.issn.1672-0636.2025.06.011
不同噪音强度下音频大地电磁对低、高阻异常体探测效果的探讨
Discussion on the relationship between the detection effect of AMT and noise intensity under different surrounding rock backgrounds
摘要
Abstract
Audio frequency magnetotelluric(AMT)method,as a geophysical sounding method widely used in recent years,has achieved good results in uranium exploration of hard rock in the south and sandstone type uranium deposits in the north.With the continuous increase in the depth of uranium exploration and the growing severity of electromagnetic noise interference in the exploration environment,the accurate identification of underground targets has become a key concern for uranium exploration researchers.Based on this,the author carried out two-dimensional electromagnetic numerical simulation.By establishing typical models of high and low resistivity anomalies and conducting forward and inverse calculations on them,the detection effects of the AMT method on different electrica l anomalies under different resistivity backgrounds of surrounding rocks were discussed.By superimposing different intensities of noise signals on the above models,the influence of noise intensity on the detection effect was compared.Finally,through the comparative analysis of the inversion results under different conditions,the relationship between the AMT detection effect of the above typical models and the depth of the anomaly body,noise intensity,and resistivity background of the surrounding rocks was summarized,which provides a basis for the subsequent application and accurate interpretation of the AMT method in different regions.关键词
音频大地电磁法/围岩/埋深/探测效果/噪音Key words
AMT/surrounding rock/depth/detection effect/noise/numerical simulation分类
天文与地球科学引用本文复制引用
ZHANG Ruliang,LIU Yifan,WANG Heng..不同噪音强度下音频大地电磁对低、高阻异常体探测效果的探讨[J].世界核地质科学,2025,42(6):1282-1290,9.基金项目
核技术研发项目(编号:物H2301-1-4)资助 Supported by Nuclear Technology R&D Program(No.物H2301-1-4) （编号:物H2301-1-4）
