Union Project Gold Discovery
Riverside Resources Intersects Near-Surface Gold and Base Metals in Sonora
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Riverside Resources has struck gold and base metals at its Union Project in northwest Mexico. The company drilled seven holes during summer 2026 and found near-surface mineralization at Union Norte, located 1.5 km north of the Union Mine. Underground sampling returned 20.2 g/t gold — a strong sign of ore-grade material National Post.
The project is being run as a partnership with Questcorp Mining, which is earning into the property. Phase 2A drilling wrapped up before monsoon season, and Phase 2B will resume in early October 2026 Riverside Resources. The company now has multiple targets lined up: Union Norte and Union Mine for follow-up drilling, plus sediment-hosted gold targets at Luis Hill and vein targets at Jabali Cold Lake Sun.
Two Drill Holes Hit Pay Dirt at Union Norte
Two holes drilled at Union Norte tested an NNW-trending structure close to the surface. Results showed both gold and base metal mineralization in the near-surface zone Financial Post. This discovery validates the team's exploration model and opens a new target area just 1.5 km from the existing Union Mine.
The near-surface nature of the Union Norte mineralization is important. Easier access means lower drilling costs and faster development potential if the company decides to advance the property Daily Guardian. The team collected underground samples showing grades of 20.2 g/t gold, well above cutoff levels for economic mining National Post.
Seven Holes Confirm Two Main Mining Targets
The Phase 2A drilling campaign completed seven holes across the district. Results confirm that both Union Mine and Union Norte are legitimate drill targets with repeatable gold and base metal intercepts Sault Star. The success rate suggests the exploration team has good geological control over where to drill next.
Riverside and Questcorp now have a clear roadmap for Phase 2B. They will focus follow-up drilling on the two proven targets while also testing new areas. The combination of near-mine targets and greenfield opportunities gives multiple ways to create value Toronto Sun.
Three New Areas Ready for Testing in Phase 2B
Beyond Union Norte and Union Mine, the team has mapped three additional target types. Luis Hill hosts sediment-hosted gold targets — a different deposit style that could yield surprises. Jabali features vein targets that the team plans to test systematically Montreal Gazette. Each target type offers a different exploration upside.
Phase 2B drilling will resume after the monsoon season ends in early October 2026 Daily Herald Tribune. Expanding the drill program across multiple targets reduces risk. If one area underperforms, others may deliver the next discovery. This diversified approach is typical of successful district-scale exploration in Mexico Financial Post.
Questcorp Partnership Earns Into Project
Riverside Resources is not funding all drilling alone. Questcorp Mining is earning into the Union Project through an option agreement, meaning Questcorp funds exploration to earn a larger stake Paris Star Online. This deal structure spreads costs and shares risk between two companies.
Partnerships like this allow junior explorers to drill more holes and test more targets than they could independently. Riverside keeps upside exposure while Questcorp funds the work. Early-stage success at Union Norte and Union Mine shows the partnership is working Clinton News Record.
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