Airborne Gravity 2010 - Geoscience Australia

Airborne Gravity 2010
Figure 3. Example of density model from FALCON AGG data.
The magnetics data acquired during the FALCON survey undergo a similar inversion process using
UBC-GIF methods (Li and Oldenburg, 1996). Solid Earth software tools are then used to produce
identical 3D meshes of recovered density and susceptibility. A Self Organizing Maps (“SOM”)
algorithm may be applied to the two volumes, resulting in the identification of physical property clusters
which can be related to lithology. Table 1 shows an example of a lithological classification using typical
petrophysical property ranges.
Table 1. Example of lithological classification
Density (g/cc) Susceptibility (SI) Lithology Lithology Code
>2.7