Anteros Metals Provides Drilling Progress Update at Seagull Critical Minerals Project, Ontario

Executive Summary

• Anteros Metals provided a drilling progress update for the Phase 1 hole (RM26‑01) at the Seagull Critical Minerals Project, now at ~670 m depth with target of ~1,350 m.
• The drill intersected the basal contact of the mafic‑ultramafic intrusion at 612.5 m and encountered trace sulphide mineralization and native copper in the overlying 9 m interval.
• Ultramafic lithologies including serpentinized lherzolite were encountered, supporting evaluation of naturally occurring hydrogen; assay results are pending.

Key Details

• Drill Hole RM26‑01: Reached ~670 m depth (two‑shift operation); target depth ≈1,350 m.
• Basal Contact Intersection: Occurred at ~612.5 m, marking transition to Archean basement quartz‑feldspar biotite schist.
• Mineralization Observed (visual):
• 9 m above basal contact – trace orthomagmatic‑style sulphide mineralization (2–4 mm disseminated blebs).
• Localized trace native copper along alteration veinlets.
• Ultramafic Lithologies: Intervals of serpentinized lherzolite encountered, favorable for hydrogen system evaluation.
• Gas Sampling Capability: Gas‑handling and monitoring equipment installed on site for ongoing sampling.
• Assay Results: All observations are visual; laboratory assay results have not yet been released.
• Operator & Agreement: Drilling conducted by Rift Minerals Inc., operator under the option agreement (announced 9 Oct 2025) that may grant Anteros up to a 49% interest in the project.
• CEO Comment: “Intersecting the basal contact… confirms the geological architecture at depth and allows us to continue drilling toward the deeper portions of the intrusion while systematically evaluating the Project’s critical minerals and gas potential.” – Trumbull Fisher, CEO.

Notable Quotes

"Intersecting the basal contact in the Phase 1 drill hole is an important step in advancing the Seagull Project," said Trumbull Fisher, CEO of Anteros. "This confirms the geological architecture at depth and allows us to continue drilling toward the deeper portions of the intrusion while systematically evaluating the Project's critical minerals and gas potential."