AuKing Mining Limited Prospectus

A U K ING M INING L IMITED I NDEPENDENT T ECHNICAL A SSESSMENT R EPORT – W ESTERN A USTRALIAN M INERAL A SSETS CSA Global Report Nº R278.2020 19 Supergene mineralisation at Onedin is well developed with the bulk of the deposit located in the oxidised and transition zones. Significant supergene enrichment of copper has occurred with a range of secondary copper minerals present: malachite, chrysocolla, bornite, covellite, chalcocite, cuprite, digenite and native copper. Amajor sub-horizontal torpedo-shaped lens of supergene copper 200 m in length straddles the oxide and transition zone. Lead is also relatively enriched in gossans above the TOFR surface where it occurs as the minerals pyromorphite and cerussite. Localised occurrences of secondary zinc are also present in the form of smithsonite; however, zinc is generally depleted in the oxide zone. The Onedin deposit has been drilled by several drilling methods, being diamond coring, reverse circulation (RC), and rotary air blast (RAB). Of these, diamond and RC drilling were used to support the Mineral Resource estimate. RAB drillholes were not used because they were drilled to shallow depths and did not intercept the zones of mineralisation. Diamond drillholes are either HQ or NQ diameter. HQ holes were used for metallurgical testwork and NQ holes were used to support the Mineral Resource estimate. A number of RC holes were extended to depth with diamond core drilling. All drill cuttings were geologically logged prior to sampling. RC drillholes were sampled at 1 m intervals, which were reduced in size to produce a sample of approximately 1–2 kg in weight. Diamond core was sampled at varying intervals ranging from 0.1 m to 4 m, by cutting core in half using a diamond saw, with one half of the sample bagged for transportation to the analytical laboratory. Diamond drill core and RC chip samples were submitted to Genalysis Laboratory Services in Perth, WA. Each sample was analysed for gold, silver, copper, lead, zinc, barium, arsenic, bismuth, antimony, nickel, cibakt, iron and magnesium. Ore grade samples were subjected to a modified four-acid (HF, HNO3, HClO3, HCl) digest followed by optical emission spectroscopy (OES) analysis for all elements excluding gold. Gold was analysed by fire assay with atomic absorption spectroscopy finish (AAS) using a 50 g charge. Samples without visible mineralisation were treated by a normal four-acid (HF, HNO3, HClO3, HCl) digest followed by OES analysis for all elements excluding gold. These samples were analysed for gold by aqua regia digest of a 50 g charge followed by solvent extraction and flame AAS. The geological interpretation supporting the Mineral Resource estimate was guided firstly by geology, and secondly by grade envelopes to constrain mineralisation. Zinc domains were based upon a lower cut-off grade of 1% Zn, and below the TOFR interface; copper domains were based upon a lower cut-off of 0.5% Cu. Up to 2 m of internal dilution was permitted during the interpretation of the mineralisation domains. Some overlap of the zinc and copper zones occurs. Weathering domains were interpreted for the BOCO and TOFR interfaces. The Mineral Resource extends along strike 260 m, across strike by 210 m and has a depth extent below surface of 450 m. The geological interpretation of the Onedin deposit by CSA Global is illustrated in plan view in Figure 10, and in cross-sectional view in Figure 11. 6. Independent Technical Report continued 94