Using information from a single bore hole

Constraints
Susceptibility values measured from drill-hole SAL-69 (see drilling details) were used to constrain the deposit scale susceptibility model. In particular, the cells intersected by the drill-hole, from 150m to 475m depth, were constrained so that recovered values for those cells were within the bounds defined earlier.

Results
The inversion result, displayed in Figure 3, shows that changes over the original inversion can be observed vertically above and below, and laterally adjacent to the bounded cells. Notable features are

• The concentration of susceptible material in the west part of the deposit exhibits higher susceptibility values
• This area also occupies less volume, and is tightly constrained between the depths of 275m and 350m.
• Moderate susceptibility values (2-3 x 10^-3 S.I.) are still present below the deposit.
• The north extension of the susceptibility anomaly is also unaffected by including the prior information.