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Regional Sampling & Analysis with Centre Log Ratio & Z Score N Kosolda Asheshi km Tolefafa West Au (CLR) -12.83--12.20 -12.20 -11.67 -11.67 -11.28 -11.28 -10.86 " -10.86--10.36 • -10.36 -9.77 • -9.77--9.01 -9.01 --8.04 -8.04 -6.76 6.76 -4.40 Map of CLR Au for the entire license area - Targets as labelled The regional soil sampling of Kerkasha (3,458 samples to cover Kerkasha on a 500m x 500m spacing) has delivered a 25 element geochemical dataset to complement the airborne geophysical and remote sensing datasets. Centre Log Ratio (CLR) Assessing data using CLR transform data allows for new insights as CLR values account for variation in other elements in the sample, rather than just considering a single component in a compositionally-closed space. Z Score Normalisation Two z-score normalisations have been implemented where normalisation of the regolith type is completed first, followed by normalisation for 'Machine Learnt' rock type. On this basis the different background concentrations of the different regolith types and different rock types are taken into account and resulting values are all comparable, irrespective of element, regolith type or rock type. A Anagulu 30 50 2.5 5 km Aburna Mine Abbi Mine Anugulu Balak Artisinal Gulul Artisinal Ebinte Artisinal Shakat Artisina Afetela she hi ine Tekinal Rosella Artisin Jolegimja Jolefafa Dekemhare Artisinál Tolefafa West Binbin Z-score: regolith/rock type -7.32 -2.11 -2.11--0.77 -0.77 -0.18 -0.18 -0.36 0.36-1.17 1.17 2.47 2.47-4.63 4.63-8.17 8.17 17.73 17.73-57.97 Map of double z-score Au + Cu values >2.47 - Targets as labelled

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