Three-dimensional (3D) inversion of magnetic data to recover a distribution of magnetic susceptibility has been successfully used for mineral exploration during the last decade. However, the unknown direction of magnetization has limited the use of this technique when significant remanence is present. We have developed a comprehensive methodology for solving this problem by examining two classes of approaches and have formulated a suite of methods of practical utility. The first class focuses on estimating total magnetization direction and then incorporating the resultant direction into an inversion algorithm that assumes a known direction. The second class focuses on direct inversion of the amplitude of the magnetic anomaly vector. Amplitude data depend weakly upon magnetization direction and are amenable to direct inversion for the magnitude of magnetization vector in 3D subsurface. Two sets of high-resolution aeromagnetic data acquired for diamond exploration in the Canadian Arctic are used to illustrate the methods’ usefulness.

Yaoguo Li

Sarah E. Shearer

Matthew M. Haney

Neal Dannemiller

Geophysics

GEOPHYSICS，自 1936 年以来由勘探地球物理学家协会出版，是一份档案期刊，涵盖应用地球物理学的研究、勘探和教育的各个方面。地球物理学文章，通常每年超过 275 篇，分六期，涵盖地球物理方法的整个范围，包括地震学、势场、电磁学和钻孔测量。 GEOPHYSICS 是双月刊，提供重现所描述工作所需的理论和数学工具，鼓励进一步的发展和研究。来自工业界和学术界的地球物理学论文经过严格的同行评审过程，以验证所描述的方法和结论，并确保最高的社论和生产质量。地球物理学编辑强烈鼓励使用真实数据，包括实际案例历史，以突出当前技术和教程以激发想法。有些问题的特色是关于当前感兴趣的特定主题的征集论文部分。近期的专题栏目主要集中在地震各向异性、盐下勘探开发、微震监测。每篇GEOPHYSICS论文的PDF格式为正式版记录。

GEOPHYSICS, published by the Society of Exploration Geophysicists since 1936, is an archival journal that covers all aspects of applied geophysics research, exploration, and education. The journal publishes over 275 geophysics articles annually, divided into six issues, encompassing the entire range of geophysical methods, including seismology, potential fields, electromagnetics, and borehole measurements. GEOPHYSICS is a bimonthly journal that provides the theoretical and mathematical tools necessary to reproduce the described work, encouraging further development and research. Geophysical papers from both industry and academia undergo a rigorous peer-review process to validate the methods and conclusions presented, ensuring the highest editorial and production quality. The editorial team strongly encourages the use of real data, including historical case studies, to highlight current technologies and tutorials that inspire new ideas. Some issues feature a call for papers on specific topics of current interest. Recent thematic sections have focused on seismic anisotropy, subsurface exploration and development, and microseismic monitoring. Each GEOPHYSICS paper is published in PDF format as a formal record.

《Geophysics》是由勘探地球物理学家协会自1936年起出版的一本档案期刊，涵盖应用地球物理学的研究、勘探和教育的各个方面。该期刊每年发表超过275篇地球物理学文章，分为六期，内容涉及地球物理方法的各个领域，包括地震学、势场、电磁学和钻孔测量。《Geophysics》是双月刊，提供重现所描述工作的理论和数学工具，鼓励进一步的发展和研究。来自工业界和学术界的地球物理学论文经过严格的同行评审，以验证所描述的方法和结论，并确保最高的社论和生产质量。编辑部强烈鼓励使用真实数据，包括实际案例历史，以突出当前技术和教程，激发新的想法。某些期刊还设有关于当前感兴趣的特定主题的征集论文部分。近期的专题栏目主要集中在地震各向异性、盐下勘探开发和微震监测等方面。每篇《Geophysics》论文的PDF格式为正式版记录。

Category	Quartile
地球科学	2
地球科学, 地球化学与地球物理	2

Comprehensive approaches to 3D inversion of magnetic data affected by remanent magnetization

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