Re: XRF Scanner26 Sep 2022 15:13
It would be nice to know if they are planning to use a XRF scanner which I think works well with metals such as copper and nickel.
XTR for example used one on their first Bushranger drill. This was spud on 16th December 2020, just a couple of months after the acquisition was completed (hint here about the speed of operations at POW which because of the pure number of projects appears to be quite slow). By 22cnd December, only 6 days into the drill, significant copper mineralisation was reported and included the following:
" Preliminary hand-held XRF measurements of the copper mineralisation have been recorded for the down hole interval 110m - 138m and indicate an intersection of 28m @ 0.3% Cu from 110m downhole depth (the mineralisation below 138m has yet to be read with the XRF instrument) - XRF results to be confirmed with geochemical assays taken from half core samples".
That drill then stopped for Xmas for 3 weeks and recommenced on 7th January 2021. It then completed the hole on 22cnd January at 1147 metres. On 25th January, 3 days later, they announced:
"Preliminary hand-held XRF measurements (to be confirmed with geochemical assays taken from half-core samples, which will also provide gold grades) indicate that copper mineralisation occurs over a downhole width of 905m from 110m downhole depth."
The final assays were out on 19th March, 2 months later, and said pretty much the same as the XRF scanner results though with the full grades:
"Assay results from the first drill hole (BRDD-20-001) of the Phase One Drilling Programme at the Racecourse deposit returned an overall intersection of 920m @ 0.3% Cu, 0.02g/t Au and 1.45g/t Ag (0.33% CuEq) from 110m downhole."
So the scanner said 905 metres and mentioned copper grades of 0.3% while the assays were for 920 metres and again at grades of 0.3% Cu.
Notice here that the scanner gave accurate readings over what was quite a low grade of copper mineralisation. Molopo Farms has already had grades of up to 1.66% nickel assayed. The higher the grades the more accurate the hand-held scanner.