Riverside begins drilling at La Union

Executive Summary

• Riverside Resources and Questcorp have begun a 1,500‑metre diamond core drilling program at the La Union project in Sonora, Mexico.
• The initial phase includes six angled holes (≈250 m each) targeting carbonate‑hosted replacement (CRD) gold mineralization across four distinct target areas.
• Questcorp’s option agreement gives it a 9.9% equity stake and funds the first $1 M of exploration, part of a planned $5.5 M work commitment.

Key Details

• Drill Program Scope: >1,500 m total core length; six holes averaging ~250 m depth; angled drilling to intersect stratigraphic and structural targets.
• Target Zones: Union main mine (Clemente formation carbonates), North Union (structural controls), Cobre mine (Clemente & underlying Caborca formations), Central Union (structural feeders in historic manto area).
• Exploration Objectives: Expand known mineralized zones, test new targets, evaluate CRD style gold deposits associated with mantos, chimneys, and structural conduits.
• Option Agreement (May 5 2025): Questcorp issued shares to Riverside, acquiring a 9.9% stake; provides financing for the initial $1 M drill program, with an additional $4.5 M contingent on results.
• Funding Commitment: Total planned work commitment of $5.5 M from Questcorp, subject to exploration outcomes and continued participation.
• Technical Review: Qualified Person Freeman Smith, P.Geo., reviewed and approved all scientific data per NI 43‑101 standards.
• QA/QC Procedures: Fire assay for gold at Bureau Veritas (Hermosillo); ICP/ES‑MS analysis of pulps in Vancouver; random standards inserted throughout sampling stream.

Notable Quotes

“We are pleased to move forward with initial drilling… Ideally, this focused initial program will be followed by a more robust drilling campaign to significantly expand on early results.” – Dr. John‑Mark Staude, CEO, Riverside Resources.