Questcorp Mining and Riverside Resources Chip Channel Sample 30 Meters @ 20 g/t Gold and 226 g/t Silver at the Mexican Union Project

Executive Summary

• Questcorp Mining and partner Riverside Resources reported a high‑grade interval of 20.2 g/t Au, 226 g/t Ag and 2.7 % Zn over 30 m from chip‑channel sampling at the Union Mine area in Sonora, Mexico.
• Full assay results for all Phase I drill holes (Union Mine, Union Norte, El Cobre) are disclosed, showing multiple CRD‑style mineralized intercepts and a newly identified Carlin‑type sediment‑hosted gold (SHGD) zone at Luis Hill (42 m @ 0.3 g/t Au).
• The results support the geological model based on South32’s Taylor deposit and justify advancing to Phase II exploration in H1 2026, including follow‑up drilling, geophysics, and mapping.

Key Details

• Chip‑Channel Sampling (Union Mine decline wall) – 30 m continuous interval:
• Au = 20.2 g/t (600 gram‑metres)
• Ag = 226 g/t (6,780 gram‑metres)

• Zn = 2.7 %

• Assay highlights from Table 1 (selected samples) – notable grades:

• Sample RRI 13969: Au 155.41 ppm, Ag 54 ppm, Zn 0.4 %, Pb 2,660 ppm.

• Several samples show >5,000 ppm As and high Cu/Pb concentrations, typical of CRD mineralization.

• Drill intercepts (Table 2) – key holes:

• Union Mine (UND25‑001): multiple intervals with Au up to 0.382 g/t, Ag up to 227 g/t, Zn up to 1,148 ppm.
• El Cobre (UND25‑002): Au up to 0.568 g/t, Ag up to 743 g/t, Zn up to 2,262 ppm.
• Famosa Mine (UND25‑004/005/010/011/012): assorted low‑grade Au–Ag intervals; notable Cu and Pb anomalies.

• Luis Hill (UND25‑009): 42 m @ 0.3 g/t Au, with multiple sub‑intervals ranging 0.005–1.31 g/t Au; identified as SHGD style comparable to Nevada Carlin deposits.

• Geological context:

• CRD‑style alteration and multi‑element signatures (Zn, Ag, Au, Pb) confirmed across Union Mine, Union Norte, and El Cobre.

• Sediment‑hosted gold indicators (SHGD) discovered at Luis Hill, expanding the project’s target model beyond carbonate‑replacement deposits.

• QA/QC: Core half‑samples assayed by Bureau Veritas (Hermosillo) and ACT Labs (Zacatecas); standards inserted every 20 samples, blanks every 100; all QC results within 2 σ of expected values.

• Next steps:

• Planning Phase II exploration for H1 2026 – additional drilling on Union Mine, Union Norte, El Cobre, and Luis Hill, plus geophysical surveys and detailed mapping.

• Permits and access confirmed; field work anticipated to commence early 2026.

• Qualified Person: R. Tim Henneberry, P.Geo., director of Questcorp (NI 43‑101).

Notable Quotes

“We are extremely pleased with the success of our initial Phase I drilling… The unexpected Luis Hill discovery of ‘Carlin’ type gold mineralization further enhances the productivity of the La Union project.” – Saf Dhillon, President & CEO, Questcorp Mining.

“These results … reinforce that drilling is intersecting the types of CRD‑style alteration and multi‑element signatures we were targeting… finding sediment‑hosted gold indicators is a key development.” – John‑Mark Staude, President & CEO, Riverside Resources.