Dominant host rock of the Kora Consolidated-Irumafimpa vein systems is the highly sheared and deformed Bena Bena formation, composed of low grade metamorphosed phyllites and amphibolites, intruded by the Elandora porphyry at the northwest end of the vein system. Mineralisation on the property includes gold, silver, and copper in low sulphidation epithermal Au-telluride veins (Irumafimpa), Au-Cu-Ag quartz-sulphide veins of Intrusion Related Gold Copper (‘IRGC’) affinity at Kora Consolidated, indications of porphyry Cu Au systems (Blue Lake) and alluvial gold.

The Kora Consolidated-Irumafimpa mineral zone occurs in the centre of a large mineralised system, approximately 5 km x 5 km in area, that has been subject to drilling in parts and comprises several individual zones of vein and porphyry-style mineralisation. The Kora Consolidated-Irumafimpa (including Kora, Eutompi and Kora North) vein deposits have been demonstrated from drilling results and underground development to be a continuous mineralised structural system.

The Kora Consolidated mineral zone comprises a K1 footwall lode and a K2 hanging wall lode separated by varying widths of 0 to 15 m. In parts there is interstitial mineralisation between K1 and K2 known as the Kora Link lode and about 90 to 150 m to the east lies the parallel Judd lode. The Judd lode (J1) as well as J2 to J4 mineralised zones appear to be a vein system similar to the Kora Consolidated zone, but as yet has not been fully def ........

The Stage 3 Expansion mine plan considered in the DFS is designed as an incline access operation with a series of ore passes for efficient material movement between sublevels and the twin incline for material transport to surface. The DFS mine plan initially employs a long hole open stoping mining method utilizing Avoca and modified Avoca mining methods, which are currently employed at the mine. Upon construction of the paste fill plant, the mining method transitions to long hole open stoping with paste fill in Q2 2024.

Long hole open stoping has been successfully executed at both the Kora and Judd deposits, with the first long hole stope mined in Q1 2020 at Kora and Q4 2021 at Judd. The Avoca methods involve backfilling from the overcut sublevel while the long hole stope is advanced from the undercut sublevel to limit the strike length of the open stope. By limiting the strike length of the open stope, the method is designed to maintain stability of the stope walls and backs and increase the ultimate strike length extracted. The application of cemented paste fill provides improved geotechnical conditions for less dilution and higher mining recovery factors, greater operating flexibility through the ability to mine above and below paste fill and a reduction in surface tailings.

Stope shapes with uneconomic development access requirements were excluded. Dilution was estimated based on a 0.5 m dilution skin for both the footwall and hanging wall using the ........

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