Impact Minerals Ltd Annual Report 2022 5 Review of Operations continued N1 N2 N3 N4 Figure 1.2: Additive Z scores for Ni-Cu-Pd-Pt-Au across the main Arkun project area. Note the large areas of anomalism in the central part of the project area. Four priority areas for follow up work are highlighted. Other areas of elevated response are also evident including the Beau target to the north. 1.1 NICKEL-COPPERPALLADIUM-PLATINUMGOLD RESULTS The results for nickel-copperpalladium-platinum and gold are shown as additive Z scores in Figure 1.2. Gold has been included because it shows a strong mathematical correlation with the other metals. It is evident that the central part of the Arkun project area stands out as being strongly anomalous in all five metals and six high priority targets and five medium priority targets have been identified as warranting follow up work. Of note is that the targets are commonly anomalous in all five metals and in particular palladium and gold (Figure 1.2). This suggests a potential relationship to sulphide mineralisation rather than being the result of elevated backgrounds of only nickel and copper related to areas of mafic rocks. This is an exceptional result and supports Impact’s original contention that the Arkun area is highly prospective for nickel-copperPGM mineralisation. The drill results are presented as additive Z score indices. Z scores are a standard statistical calculation of the number of standard deviations a raw data (assay) value is from the mean of the data. For example a Z score of 2 indicates a value 2 standard deviations above the mean. The higher the Z score, the more anomalous the data point is with respect to the dataset. Z scores are a standard method of normalising data so that statistically meaningful associations between datasets can be made. In this case the Z scores for individual metals that occur within assemblages specific to the alteration zones around a nickel-copper-PGM deposits are simply added together in order to amplify the association.
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