地质与资源2025，Vol.34Issue(5)：595-601,7.DOI:10.13686/j.cnki.dzyzy.2025.05.007
磁法位场转换在非典型磁异常铁矿勘查中的相关研究
Application of magnetic potential field transformation in exploration of iron deposit with atypical magnetic anomaly
摘要
Abstract
In Liaoning region,where the geomagnetic inclination is approximately 60°,the magnetic data interpretation has traditionally relied primarily on total field magnetic anomalies(ΔT)or vertical component anomalies(ΔZ).However,for gently dipping iron orebodies,these anomalies are only present over the upper parts(ore heads)of the deposits.Based on demagnetization calculations for Anshan-type iron deposits,it is found that the magnetization direction of non-southward gently dipping orebodies shifts significantly towards the direction parallel to the bedding plane(horizontal direction).Consequently,using the magnetic potential field transformation,the geomagnetic profile ΔT anomalies were converted into ΔH anomalies,and weak ΔH anomalies were revealed over the main parts of gently dipping orebodies,precisely where ΔZ and ΔT show no significant anomalies.Therefore,the transformed ΔH anomaly can be utilized to qualitatively delineate the extent of these gently dipping orebodies.The successful application of this method in practical exploration has demonstrated positive results.关键词
非典型磁异常/缓倾铁矿体/位场转换/水平场/鞍山式铁矿Key words
atypical magnetic anomaly/gently dipping iron orebody/potential field transformation/horizontal magnetic field/Anshan-type iron deposit分类
天文与地球科学引用本文复制引用
张晓周,蒋丽丽..磁法位场转换在非典型磁异常铁矿勘查中的相关研究[J].地质与资源,2025,34(5):595-601,7.基金项目
辽宁省自然资源厅2023年度省级地质勘查项目"辽宁省辽阳市小岭子地区铁矿普查"(JH23-210000-06455/0614SY230154). （JH23-210000-06455/0614SY230154）
