Questcorp and Riverside Complete the First Phase of Drilling at the La Union Gold and Silver Project

Executive Summary

• Questcorp Mining completed Phase 1 of the La Union gold‑silver CRD exploration program in Sonora, Mexico – 12 diamond core holes totaling >1,600 m across six priority targets.
• Over 700 half‑core samples have been shipped to laboratories for assay; results are pending and will drive scope of a Phase 2 drilling campaign anticipated in H1 2026.
• The program confirmed the presence of historic carbonate host units and structural controls typical of CRD systems, providing new geological data to refine the model and support future large‑scale discovery potential.

Key Details

• Drilling Scope: 12 core holes; >1,600 m drilled across Union Mine, Union Norte, Cobre, Luis, Famosa, and Famosa Mag targets.
• Target Objectives: Test shallow carbonate‑hosted gold‑silver mineralization, evaluate continuity of historic manto horizons, chimney/feeder structures, and structural controls.
• Sampling: >700 half‑core samples shipped; first 8 holes to Bureau Veritas (Hermosillo) for fire assay + ICP‑MS; final 4 holes to ACT Labs (Zacatecas) using identical methods.
• Assay Status: All samples logged, saw‑cut and dispatched; assays pending – results will be announced once received.
• Geological Findings (qualitative): Core logging noted intrusive dikes, breccias, sulfide mineralization, and carbonate host strata consistent with CRD systems; no geochronology completed yet.
• Historical Context: Prior NI 43‑101 report (May 7 2025) cited surface dumps with >0.5 oz/t Au (>15 g/t). The new drilling validates the carbonate host units underlying historic workings.
• Next Steps: Upon receipt of assay data, Questcorp will integrate results with geophysics and multi‑element geochemistry to refine the CRD model and define Phase 2 drill targets; Phase 2 expected in H1 2026 pending permits and access.
• Qualified Persons: Technical content reviewed by Freeman Smith, P.Geo (Riverside Resources) and R. Tim Henneberry, P.Geo (Director, Questcorp).

Notable Quotes

“This first exploration phase accomplished initial drill holes into 6 target areas… advances our geologic model and supports the potential for a large‑scale discovery.” – Dr. John‑Mark Staude, President & CEO, Riverside Resources

“We are excited to have completed this first phase of drilling at La Union… we anxiously await the return of the assays from the lab as we look to plan follow‑on development.” – Saf Dhillon, President & CEO, Questcorp Mining Inc.