
%0 Journal Article
%A Scholl, C. 
%A Neumann, J. 
%A Watts, M.D. 
%A Hallinan, S. 
%A Mul&#xe8;, Shane 
%T Geologically Constrained 2D and 3D Airborne EM Inversion Through Cross-Gradient Regularization and Multi-Grid Efficiency
%J ASEG Extended Abstracts
%D 2016/08/24
%V 2016
%N 1
%P 1-6
%K 
%R https://doi.org/10.1071/ASEG2016AB229
%U https://www.publish.csiro.au/paper/ASEG2016AB229 
%X With a goal of increasing the geological reliability of single and joint domain inversion, including those set in rugged terrain, we present an expanded scope for cross-gradient regularized inversion. The basic application covers the usual structural similarity objective &#x2014; comparing the gradient fields of distinct property volumes derived from different geophysical domains &#x2014; but a particular advantage comes when including gradients derived a priori, from geology or any ancillary property set, providing reference gradient control during single or joint inversions.In the first example, straightforward cross-gradient joint inversion of synthetic datasets of airborne EM (AEM) and airborne gravity-gradiometry (AGG) improves both the lateral and vertical definition of closely adjacent but distinct bodies.Two further AEM examples include surface and subsurface geology in the cross-gradient inversion; a) complex foothills setting, and b) buried massive sulphide. Both outputs demonstrate a marked improvement in interpretability over the standard smooth model approach. 
