2024 Drilling Highlights
• Eduwiges Extension Vein
o 519 g/t AgEq over 3.2 metres
• San Miguel Vein
o 364 g/t AgEq over 7.5 metres
o 425 g/t AgEq over 3.3 metres
o 365 g/t AgEq over 2.6 metres
o 301 g/t AgEq over 5.9 metres
o 322 g/t AgEq over 3.7 metres
Vancouver, British Columbia – October 30, 2025 – Quetzal Copper Corp. (doing business as
Silverco Mining Ltd.) (“Silverco” or the “Company”) (TSXV: SICO) is pleased to report assay results
from its 5,500-metre 2024 diamond drill program at the Company’s 100%-owned and permitted
Cusi Property (“Cusi”), located approximately 90 kilometres northwest of the Los Gatos Mine in
Chihuahua, Mexico.
The Cusi Mine was in commercial production until September 2023, when it was placed on care
and maintenance. The property has seen limited modern exploration, and results from the 2024
drill campaign represent a step change in both size and grade potential of the mineralized
system. Building on these results, Silverco is advancing a 15,000-metre 2025 drill program, with
initial assays expected in the fourth quarter of 2025. The Company’s objective is to convert this new
geological understanding into an expanded, higher-grade resource base to support possible restart
of operations as soon as H2 2026, subject to technical studies, financing, permitting and a positive
restart decision.
Mark Ayranto, CEO of Silverco, commented:
“When we acquired the Cusi Mine in early 2024, we recognized the untapped potential of the San
Miguel Vein within the inset claims which we were able to acquire concurrently through an
additional transaction. Our initial 2024 drill program has confirmed significant, open-ended
resource potential that we are now actively expanding. We believe the San Miguel Vein can
underpin a higher-grade production profile upon the planned mine restart in H2 2026.”
“Perhaps even more significant is our interpretation that all major mined veins at Cusi may continue within a down-thrown block to the northeast. This model was validated by the recent discovery of
519 g/t AgEq over 3.2 metres in a 200-metre step-out hole at the Eduwiges Extension. This marks
the third vein with open mineralization confirmed in extension drilling. Collectively, these results
demonstrate that Cusi has the potential to be substantially larger and higher grade than previously recognized.” see & read more on
https://www.silvercomining.com/_resources/Cusi%2020251029%202024%20Drill%20Program%20Results%20FINAL%20.pdf