ESGold Reports Positive Results from Colombian Tailings

Initial testing confirms favorable gold and silver recoveries from historical tailings using a simple, low reagent gravity circuit, validating ESGold’s clean, low-cost extraction model and supporting the Company’s future pilot and expansion plans

VANCOUVER, B.C., Oct. 14, 2025 (GLOBE NEWSWIRE) -- via IBN – ESGold Corp. (“ESGold” or the “Company”) (CSE: ESAU | OTCQB: ESAUF | FSE: Z7D) reports initial metallurgical results from the Deister table tests from bulk tailings samples collected in Colombia’s Bolívar region under the Company’s recently signed Planta Magdalena memorandum of understanding. Bench work, which was supervised by Edmond St-Jean, Ing., confirms materials tested are amenable to simple gravity separation using a circuit analogous to the flowsheet for ESGold’s Montauban project in Quebec.

Key Highlights

• Representative feed grades (bench scale): Mean analyzed ~4.88 g/t Au and ~35.7 g/t Ag (mean “calculated” balance ~5.05 g/t Au, ~30.2 g/t Ag), consistent with historical mercury-processed tailings.

• Recoveries (bench scale): Gold recovery varied by test with one test achieving ~52% Au recovery with clean separation. Lower and variable recoveries in other tests were attributed to manual, irregular feeding during bench work. Optimization procedures implemented are expected to improve and stabilize recoveries.
   
• Concentrate grades (bench scale): Average gravity concentrate ~59 g/t Au and ~193 g/t Ag across tests (test-to-test variability noted).
  
  
• Mass pull: ~2.8% of feed reported to gravity concentrate on average. A secondary upgrade step (e.g., Gemini table) is expected to further reduce concentrate mass for downstream treatment.
  
  
• Simple circuit, low reagents: Tests used no additional chemical reagents and results were compatible with ESGold’s low-reagent, low-emission gravity flowsheet at its Montauban project.
  
  

“With our team now on the ground in Bolívar, these results provide clear validation of the strong potential economics that can be achieved through a simple, clean extraction process,” said Gordon Robb, CEO of ESGold. “We were encouraged as tests confirm the technical merits of the material and suggest that further optimization, including recovery of silver values, could further enhance the project. As we move forward with validation, our team is focused on advancing pilot work, improving process efficiency, and assessing the surrounding area for additional sources of higher-grade feed. Taken together, these steps represent the beginning of what appears to be a very promising chapter for ESGold in Colombia.”