Overview Operating Review continued Strong assays outline scope of new areas of high-grade gold at Bramaderos Surface sampling and geological mapping during the June quarter identified additional areas of epithermal gold-silver mineralisation, with up to 14.4g/t gold in surface rock chip samples. The results confirm that multiple higher-grade epithermal mineralised corridors extend from the defined porphyry gold-copper deposits at Brama-Alba within Bramaderos. The discovery of more high-grade gold areas would have major ramifications for the economics at Bramaderos. Geological mapping programs have been undertaken in the areas to the north and west of the large BramaAlba porphyry gold-copper deposit as follow-up work to previous exploration at the outcropping Espiritu and West Zone epithermal gold-silver-lead-zinc occurrences. Refer to Figure 5. The follow-up is based on the evolving geological model of structural corridors – based largely on the Limon epithermal gold-silver deposit and related Limon porphyry gold-copper target – and defined at surface throughout the Bramaderos Project area by domains of altered rock and their geochemical signature. Figure 5: Brama-Alba gold-copper porphyry deposit surrounded by alteration corridors related to epithermal gold mineralisation at West Zone, Espiritu, Espiritu Southeast, and newly defined areas within the blue rectangle. The green background contours show the epithermal pathfinder element arsenic in soil samples. New key epithermal exploration targets are developing in the four white shaded areas. 10 Sunstone Metals Limited Annual Report 2025
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