Ridgeline outlines Selena exploration target

Executive Summary

• Ridgeline Minerals Corp. has defined a conceptual mineral exploration target at its Chinchilla oxide deposit within the Selena Project, Nevada, estimating 38.3 to 58.0 million tonnes (MT) of mineralized material.
• The target grades range from 39.8 to 52.0 g/t Ag, 0.12 to 0.15 g/t Au, 0.42% to 0.55% Pb, and 0.40% to 0.51% Zn. The company notes that this is conceptual in nature and has not been defined as a mineral resource.
• The release highlights high-grade drill intercepts, metallurgical testing suggesting heap leach potential for silver and gold, and outlines future drilling plans to test the adjacent Chinchilla sulphide discovery in collaboration with partner South32.

Key Details

• Exploration Target Definition:

  • Tonnage: 38.3 to 58.0 million tonnes (MT).
  • Silver Grade: 39.8 to 52.0 g/t Ag.
  • Gold Grade: 0.12 to 0.15 g/t Au.
  • Lead Grade: 0.42% to 0.55% Pb.
  • Zinc Grade: 0.40% to 0.51% Zn.
  • Methodology: Preliminary 3-D modelling; prepared under National Instrument 43-101 guidelines using a third-party Qualified Person (QP).
  • Cut-off: Low-grade cut-off of 15.0 g/t Ag with three-metre composites.
  • Status: Conceptual; uncertain if further exploration will result in a defined mineral resource.

• Highlight Drill Intercepts (Chinchilla Oxide):

  • SE22-045: 32.5 m at 153.42 g/t Ag, 0.09 g/t Au, 4.1% Pb-Zn.
    • Includes 6.1 m at 480.52 g/t Ag, 0.1 g/t Au, 18.4% Pb-Zn.
    • Includes 0.7 m at 1,347.73 g/t Ag, 0.11 g/t Au, 40.9% Pb-Zn.
  • SE23-047: 60.7 m at 69.8 g/t Ag, 0.4 g/t Au, 1.8% Pb-Zn.
    • Includes 7.7 m at 146.5 g/t Ag, 0.9 g/t Au, 1.7% Pb-Zn.
  • SE21-025: 44.2 m at 123.2 g/t Ag, 0.1 g/t Au, 2.1% Pb-Zn.
    • Includes 7.6 m at 237.8 g/t Ag, 0.2 g/t Au, 3.8% Pb-Zn.

• Metallurgical Testing:

  • 2021 bottle roll testing on RC composites showed 31.5% to 50.0% Ag and 76.7% to 83.3% Au cyanide solubility, suggesting amenability to heap leach processing.
  • Core drilling (2023-2025) confirmed that RC drilling previously washed out Ag-rich clays, diluting grades and reducing solubility; additional testing on core samples is required.
  • Pb and Zn were not analyzed in the 2021 program; additional testing is needed for these metals.
  • Recoveries do not apply to the Chinchilla sulphide discovery, which requires milling.

• Data Base:

  • 33 reverse circulation (RC) and core drill holes totaling 8,250.3 m.
  • 5,650 assay samples.
  • Five surface trenches totaling 180.4 m with 122 assay samples.

• Project Context & Strategy:

  • The Chinchilla oxide zone remains open along strike and down-dip toward the Chinchilla sulphide discovery.
  • The Selena project exhibits over four kilometers of proven mineralized strike.
  • 2026 strategy involves continuing to drill test the Chinchilla sulphide discovery to understand the scale and grade of the sulphide system.
  • Project is operated by Ridgeline under Phase 1 of an earn-in agreement with South32 (South32 may earn up to 80% interest).

• QA/QC:

  • Samples submitted to American Assay Laboratories (AAL) and checked by Paragon Geochemical Labs (PAL).
  • Analyzed using FA-PB30-ICP (Au) and ICP-5AM48 (multi-element).
  • Qualified Person: Michael T. Harp, Vice-President, Exploration.

Notable Quotes

• Chad Peters, President, CEO, and Director: "The Chinchilla oxide deposit was Ridgeline's original outcropping Ag-Au oxide discovery made by the team in 2020 and we always knew it had the potential to become a deposit of significant scale. Announcing a mineral exploration target helps to further highlight this exciting opportunity and better frame the upside potential across multiple mineralized zones at the Selena project."
• Chad Peters: "Our strategy in 2026 will be to continue drill testing the Chinchilla sulphide discovery to better understand the potential scale and grade of the sulphide system, which will help our teams better understand the combined resource potential of the greater mineralized system at Selena as we continue to grow this very exciting polymetallic deposit."