Metallurgical tests deliver increased Bramaderos recoveries

Key points

• Latest metallurgical tests show higher recoveries than previous estimates
• Average recoveries now 80% for copper and 93% for gold
• Positive impact expected on project metrics like NPV and production
• Conventional flotation processing confirmed as technically viable
• Clean copper concentrates with minimal smelter penalty risk

Full summary

Sunstone Metals Limited has announced highly favorable results from metallurgical tests conducted on the Bramaderos Gold-Copper Project in southern Ecuador. The tests have demonstrated significantly higher recoveries of copper and gold than previously estimated, with average recoveries now at 80% for copper and 93% for gold. These results are expected to have a material positive impact on key project metrics including net present value (NPV), production, and unit costs. The tests confirm the technical viability of conventional flotation processing for both principal ore types within the Bramaderos resource. Additionally, the results indicate the potential to produce clean copper concentrates with minimal smelter penalty risk, further enhancing the project's viability.

Outlook

The improved metallurgical recoveries are expected to enhance the overall project value and support the continued advancement of Bramaderos as a potential large-scale gold-copper development opportunity.