物探与化探2025，Vol.49Issue(6)：1251-1260,10.DOI:10.11720/wtyht.2025.0345
磁铁矿矿致磁异常测定方法及其应用
A novel method for determining magnetite ore-induced magnetic anomalies and its application
摘要
Abstract
Accurately and quickly determining the geological properties related to magnetic anomaly sources is a key technical challenge in magnetic prospecting,directly influencing the accuracy of geological interpretation using magnetic survey data.The induced magneti-zation varies with time,whereas the remanent magnetization typically remains constant over time.Therefore,there exists a theoretical basis for investigating the properties of magnetic anomaly source bodies by detecting the time variations of magnetic anomaly intensity.Despite geophysicists' relevant research in this field,practical technical methods have not been established.Hence,this study pro-posed a novel method for determining magnetite ore-induced magnetic anomalies.Based on the observational data of geomagnetic diur-nal variations,the proposed method constructed parameters,including the variations(A),variation rate(η),and normalized varia-tions(F)of magnetic anomaly intensity,to evaluate the properties of strong magnetic anomaly source bodies.Accordingly,the pro-posed method determined the possibility of magnetite ore-induced magnetic anomalies,showing critical significance for magnetite explo-ration.关键词
磁法勘探/感应磁化强度/剩余磁化强度/矿致异常/地磁日变/磁铁矿/磁异常强度变化量Key words
magnetic prospecting/induced magnetization/remanent magnetization/ore-induced anomaly/geomagnetic diurnal varia-tion/magnetite/variation of magnetic anomaly intensity分类
天文与地球科学引用本文复制引用
范正国,杨海,葛藤菲,何敬梓,贾志业,范振宇,刘前坤,杨雪..磁铁矿矿致磁异常测定方法及其应用[J].物探与化探,2025,49(6):1251-1260,10.基金项目
国家重点研发计划项目"低缓磁异常弱信息提取与富铁矿体定位技术示范"(2022YFC2903704) （2022YFC2903704）
省部合作项目(2024ZRBSHZ132-2) （2024ZRBSHZ132-2）
中国地质调查局地质调查项目(DD20240119、DD20243245) （DD20240119、DD20243245）
