About the Geology

The geological setting is interpreted as the eastern side of a syncline, within a mafic/ultramafic volcanic suite, overlain with BIF/sediments/felsic rocks. This area has undergone intense folding and shearing, with the major shear structure dubbed the “Gabanintha Shear”. This pattern of folding and shearing along the contact is seen throughout the region.

Observations from Gold Resource Review

• A Structural Geology Consultant commissioned to review the mineral resource estimate and structural models and advise on the potential to increase the size of the Tumblegum South Resource in May 2024
• Combining the observed geometries in the resource model with those interpreted from the initial aeromagnetic interpretation Star review of the Gold resource and structural model indicates potential to materially increase the resource from a combination of shear zone hosted and crackle breccia hosted gold mineralisation.
• Revised structural interpretation indicates potential for additional high-grade lodes (subject to drilling).
• Only the central portion of the near surface area of the duplex has previously been tested by the post-2019 drilling. This drilling revealed duplex geometries on the linking splay between T1 and T2. The zones of maximum curvature (in plan and section) in the shears plus high-grade gold mineralisation correspond to areas of maximum dilation in the thrust surfaces that make up the duplex.
• The resource model indicates that there is a strong thrust control on the gold mineralisation D Zone lodes with duplex geometries that control the high-grade mineralisation. There is potential to find more of these duplex geometries on and between the T1 and T3 thrusts.

Current (INFERRED and INDICATED) Resource Model

Figure 3: Main vein sets and cross-section of thrust structural interpretation with initial (2019) RC drilling