en.Wedoany.com Reported - Riverside Resources Inc. and Questcorp Mining Inc. have initiated the second phase of a diamond drilling program at the La Unión gold-silver project in Sonora, Mexico, covering an area of 25 square kilometers. The companies stated that this exploration phase is fully funded, avoiding dilutive capital in the short term and ensuring operational continuity.

The drilling program is expected to implement approximately 1,500 meters of drilling across 8 to 10 inclined holes, each averaging 180 meters in depth. The primary objective is to expand on discoveries from the first phase (results announced in January 2026) and assess deep potential beyond historical mine boundaries.

The drilling activities are designed under strict structural guidance to intercept two key mineralization types: gold in sedimentary rocks and carbonate replacement deposits (CRD) rich in gold, silver, and zinc. Riverside CEO John-Mark Staude stated that the team employed advanced structural synthesis techniques to identify northwest-trending faults, which serve as major conduits for high-grade mineralizing fluids.

To mitigate risk and optimize drill hole positioning, the exploration integrates tools such as detailed structural mapping at the district scale, 248 line-kilometers of drone aeromagnetic coverage, and a recently completed comprehensive induced polarization (IP) survey.

Questcorp President and CEO Saf Dhillon described this launch as a transformative milestone, propelling the company into an active exploration drilling phase. This phase is based on a geological model indicating a large, interconnected, and largely unexplored mineralized system at depth.

The work plan will prioritize five key areas beyond the main mine, including the newly discovered Negra zone (which has yielded surface gold samples), the Luis Hill-Alej Hill zone, and the Jabali zone. The latter is characterized by low-sulfidation epithermal vein systems with gold grades exceeding 5 grams per ton. The two companies will continue releasing technical information through the summer of 2026.

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