磁铁矿矿致磁异常测定方法及其应用

doi:10.11720/wtyht.2025.0345

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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 magnetization 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 proposed a novel method for determining magnetite ore-induced magnetic anomalies. Based on the observational data of geomagnetic diurnal variations, the proposed method constructed parameters, including the variations (A), variation rate (η), and normalized variations (F) of magnetic anomaly intensity, to evaluate the properties of strong magnetic anomaly source bodies. Accordingly, the proposed method determined the possibility of magnetite ore-induced magnetic anomalies, showing critical significance for magnetite exploration.

Key words： magnetic prospecting induced magnetization remanent magnetization ore-induced anomaly geomagnetic diurnal variation magnetite variation of magnetic anomaly intensity

Received: 16 September 2025 Published: 30 December 2025

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P631.1

Corresponding Authors: HE Jing-Zi E-mail: 244340007@qq.com;749079407@qq.com

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	Articles by authors
	Zheng-Guo FAN
	Hai YANG
	Teng-Fei GE
	Jing-Zi HE
	Zhi-Ye JIA
	Zhen-Yu FAN
	Qian-Kun LIU
	Xue YANG

Cite this article:

Zheng-Guo FAN,Hai YANG,Teng-Fei GE, et al. A novel method for determining magnetite ore-induced magnetic anomalies and its application[J]. Geophysical and Geochemical Exploration, 2025, 49(6): 1251-1260.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2025.0345 OR https://www.wutanyuhuatan.com/EN/Y2025/V49/I6/1251

Time variations of geomagnetic field intensity in the Pingyin area, Shandong Province

30-31]) and regional geological sketch map (modified from[37]) of Zouping-Jinling area, Shandong Province
">

The tectonic location map(a)(modified from[30-31]) and regional geological sketch map (modified from[37]) of Zouping-Jinling area, Shandong Province

Magnetic characteristics and anomaly intensity of Zouping magnetic anomaly area and Jinling anomaly area

Aeromagnetic anomaly map and distribution of magnetic diurnal variation stations in the Zouping-Jinling area, Shandong Province

Measurement data processing results of magnetic anomalies in Mengbaizhuang, Wangwangzhuang, Houjiazhuang, and Beijinzhao

Curves showing the magnetic diurnal variations at the background(T_b) and anomaly stations of the Mengbaizhuang magnetic anomaly(T_a)

Curves showing the magnetic diurnal variations at the background(T_b) and anomaly stations of the Wangwangzhuang magnetic anomaly(T_a)

Curves showing the magnetic diurnal variations at the background(T_b) and anomaly stations of the Houjiazhuang magnetic anomaly(T_a)

The variation rate of magnetic anomaly intensity A and its relative normal field variation amplitude η

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