Airborne Magnetics and Electromagnetics surveys are widely used in mineral resource exploration. Beyond the sensitivity of both to certain mineral deposits, magnetics serves as a useful proxy for geological structure. We extend our previous work on cross-gradient, structurally-guided 3D EM inversions to use two-dimensional gradients derived from pre-processed magnetic grids as a structural guide in inversions of AEM data sets We compare 3D resistivity inversion results obtained with this structural guiding approach to those without, for AEM data recorded in a survey in New Brunswick, Canada. This structurally-guided 3D inversion method using magnetics data is generic and can be applied to inversion of other geophysics data such as ground electromagnetics, etc.

Open-Access Online Publication: May 29, 2023