
TY  - JOUR
A1  - Scholl, C. 
A1  - Neumann, J. 
A1  - Watts, M.D. 
A1  - Hallinan, S. 
A1  - Mul&#xe8;, Shane 
T1  - Geologically Constrained 2D and 3D Airborne EM Inversion Through Cross-Gradient Regularization and Multi-Grid Efficiency
JF  - ASEG Extended Abstracts
JO  - ASEG Extended Abstracts
Y1  - 2016
VL  - 2016
IS  - 1
SP  - 1
EP  - 6
KW  - 
UR  - https://doi.org/10.1071/ASEG2016AB229 
N2  - 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. 
ER  -

