Abstract
Aeromagnetic gradient data have higher horizontal resolution on shallow sources, a magnetic anomaly that can better reflect the features of deeper sources. Therefore, we used a joint survey of aeromagnetic and gradient data to obtain the distribution of sources with different depths. In this paper, we propose an intersection constraint weighting (ICW) method based on aeromagnetic and gradient data for original and gradient anomalies with inconsistent high-low variation characteristics. The ICW method can effectively improve the resolution of inversion results and can more accurately obtain the distribution of magnetic bodies via cross-gradient by gradually adding a gradient component and applying a normalized property weighting function. Our theoretical model tests indicate that the distribution of the recovered magnetic susceptibility model of the ICW method was similar to that of the true model. In addition, the anomaly containing noise with different signal-to-noise ratios verified that the ICW method had a stronger anti-noise ability than other methods. We also inverted real data in the Zhurihe area of the Inner Mongolia Autonomous Region in northern China. The inversion result showed that the main trend of high magnetic bodies was in the northeast direction, that the shallowest depth of high magnetic bodies was 100 m, and that the greatest depth was 960 m.
Funder
National Natural Science Foundation of China
Subject
General Earth and Planetary Sciences
Reference44 articles.
1. An aeromagnetic investigation of the Dapai deposit in Fujian Province, South China: Structural and mining implications;Wang;Ore Geol. Rev.,2019
2. Gao, X.H., Xiong, S.Q., Yu, C.C., Zhang, D.H., and Wu, C.P. (2021). The estimation of magnetite prospective resources based on aeromagnetic data: A case study of Qihe Area, Shandong Province, China. Remote Sens., 13.
3. The Ivrea Zone as a model for the distribution of magnetization in the continental crust;Wasilewski;Geophys. Res. Lett.,1982
4. An estimation of continental crust magnetization and susceptibility from Magsat data for the conterminous United States;Schnetzler;J. Geophys. Res.-Sol. Earth,1985
5. Inversion of aeromagnetic data using digital terrain models;Woodward;Geophysics,1993
Cited by
2 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献