BOTG 24 Mar 2023 09:54
A 2nd BOTG was sent on Friday:
But while B1 is drill ready, we still want to do some more work on B3 and B4 before we start the drill bit turning.
…..revisiting DHEM data allowed us to remodel and redefine the target…..a much tighter shape.
…possible because downhole EM data gives pure data taken at the depth of the causative body. Where modelling from surface results in a lot of noise from the rock formations between the geophysical anomaly and the surface, downhole readings don’t face anything like this. This gives us much greater resolution and, in turn, more discrete dimensions.
A target’s “conductance” is the average for its entire surface area. So, when this surface area decreases as it has at B1, the figure rises as its being spread over a smaller area.
Alongside this, Jeremy’s desktop studies reviewing other discoveries around the world has provided us an updated interpretation that the target could be associated with pyrrhotite. Pyrrhotite is very highly conductive and often associated with the nickel-bearing mineral pentlandite in nickel/copper/platinum group element massive sulphide bodies.
Likewise, we’ve also been able to use the data to effectively rule out a number of possible causes for the conductance other than massive sulphides. These include burned coal and saline aquifers.
The more surveying and data interpretation we’ve done on B1, the more precisely we’ve been able to define it.
The more precisely we’ve been able to define the target, the higher its conductance and the greater our confidence it could be what we are looking for.
That’s the stage we want to get to with B3 and B4.
After all, the two conductors are already in the range of potential sulphides with modelled conductance of 4,100 and 2,760 Siemens.
However, both have also been modelled as much larger in surface area than B1.
With this in mind, we see an opportunity to enhance our understanding of B3 and B4 by gathering more data on them ahead of drill testing.
A range of surface surveys are now underway on the conductors, and we have also commissioned a leading geological authority to complete a new report.
So, while it goes without saying that we’re keen to get the rig in the field and the drill bit turning as quickly as we can…