Coil Size - v - Mineralization

[Anonymous]

G'Day Detecter Classroom,
Can Coil Size have any effect on its sensitivity to ground mineralization ?
Therefore would a Larger Coil have a larger "Hot Spot" area that is exposed to ground mineralization than its smaller brother requiring more ground cancelling - balancing adjustments.
Or does a Smaller Coil "Light Up" the ground more due to its sensitivity to smaller targets and therefore is effected more by mineralization than its larger brother.
Thanks for some answers. Gary Q

 

[Anonymous]

For VLF machines, large coils are more affected by mineralization because of the increased area coverage. PI is relatively insensitive to mineralization, and I assume that holds for large coils as well as small.
- Carl

 

[Anonymous]

Hi Gary,
In West OZ the 14" & 18" DD coils handle HOT ground better than the 11"DD. With monoloop coils it is a debatable story because the small coils are more noisy but only on hotrocks or isolated spots of ground noise, whereas with a big mono coil those same spots are quieter but more spread out. With these spots spread out, often they virtually merge with the next hot spot so the entire ground seems noisy, whereas with a small mono the ground between the hot spots is relatively quiet. When the ground gets this bad, we just use the big DD coils. The problem with a big mono on such ground is that a broad-soft-deep signal could be a deep nugget so you end up digging a lot of false alarms. Cheers, Chris Hake.