KEYNOTE ADDRESS: RECENT ADVANCES IN LARGE-SCALE 3D INVERSION OF AIRBORNE ELECTROMAGNETIC AND POTENTIAL FIELD DATA

摘要

Today's mineral exploration is driven by the simple fact that discovery rates have not kept pace with the depletion of existing reserves. To improve discovery rates, there is an industry-wide consensus on the need to increase the 'discovery space' by exploring under cover and to greater depths using 3D geological modelling supported by 3D geophysical inversion. This paper reviews the recent development of 3D airborne geophysical inversion, and identifies those advances which have resulted in the paradigm changes that have had immediate and significant impact on mineral exploration; namely the introduction of a moving footprint for mega-cell 3D airborne electromagnetic (AEM) inversion, and massive parallelization for giga-cell 3D potential field inversion.