Reduction-to-the-pole method for aeromagnetic three-component data in different latitudes
Hua Guo, Ming Wang*, Song Han, Chang Chang, Yuyang Yao
1 China Aero Geophysical Survey and Remote Sensing Center for Natural Resources, Beijing, 100083, China
2 Jilin University, Changchun, 130000, China
3 Chinese Academy of Geological Sciences Institute of Geology, Beijing, CN, 100037
4 China University of Geosciences Beijing, CN, 100084
Abstract China’s aeromagnetic three-component detection system was successfully developed in 2017, but how to use the three-component data of a large area aeromagnetic field to conduct geological interpretation research is still in the initial stage. This study proposes that the vector map of the total intensity of magnetic anomaly drawn after the aeromagnetic three-component data was significantly facilitated in geological interpretation. The related literature and books have developed the reduction-to-the-pole formula for aeromagnetic threecomponent data, but it is not final. Therefore, this paper derives the ultimate simple reductionto-the-pole method based on aeromagnetic three-component data for the first time using a deep theoretical formula. The simple model of a single anomalous body and the complex model of four anomalous bodies are designed. The aeromagnetic three-component data in different latitudes is used to analyze the effect of the aeromagnetic three-component data. The results show that the effect of aeromagnetic three-component data at low latitude is not ideal, and the vector arrowhead of the total intensity of magnetic anomaly drawn after the reductionto-the-pole method for the aeromagnetic three-component data is studied. The total intensity vector arrowhead of the magnetic anomaly’s total strength drawn after the three-component data of the magnetic fi eld can point to the magnetic geological body, and the converged vector arrow’s position can reflect the geological body’s buried depth. Then, the idea is applied to the aeromagnetic three-component data in the northern part of China, and the vector arrowhead of the total intensity of the magnetic anomaly is drawn. The vector arrowhead diagram of the total intensity of the magnetic anomaly is upward and downward. This study proposes that the different orientation phenomenon of the arrowhead is due to the remanence in the region’s magnetic geological body and is verified by comparing the geological data.
Fund: Supported by Wenhai Program (2021WHZZB0400) and National Key Research and Development Program of China (2017YFC0602000).
Corresponding Authors: Ming Wang (E-mail: 64037990@qq.com).
E-mail: 64037990@qq.com
About author: Guo Hua, graduated from Jilin University in 2011 and obtained a master’s degree. Graduated from China University of Geosciences (Beijing) in 2016 and obtained a doctor’s degree. Now works in China Aero Geophysical Survey and Remote Sensing Center for Natural resources. Now as an off campus cooperation tutor of Jilin University. The main research direction is the development of aeromagnetic measurement system of UAV and aeromagnetic data processing and interpretation.
Cite this article:
. Reduction-to-the-pole method for aeromagnetic three-component data in different latitudes[J]. APPLIED GEOPHYSICS, 2024, 21(2): 289-302.
2024, Vol. 21 
