GR Silver Mining provided a corporate update on its Plomosas Project in Sinaloa, Mexico. The company confirmed its 20,000-metre drill program at San Marcial is progressing, targeting resource growth and updated estimates in 2026. GR Silver also highlighted advancement toward bulk sample test mining and pilot plant activities while maintaining a strong treasury and debt-free position.
Silverco Mining Ltd. filed its NI 43-101 Technical Report supporting the Preliminary Economic Assessment for the Cusi Project in Chihuahua, Mexico. The PEA outlines a low-capital restart of the past-producing silver-lead-zinc-gold mine, supported by existing infrastructure, updated resources, and plans for renewed underground operations.
Questcorp Mining and Riverside Resources completed an expanded drone aeromagnetic survey at the La Union Project in Sonora, adding 248 line-km of coverage to refine drill targets ahead of a fully funded summer drill program. The survey improved imaging of concealed structures potentially linked to mineralization, with IP geophysics and drill mobilization expected soon.
Oroco Resource Corp. reported additional strong drill results from its Santo Tomás copper project in Sinaloa, including intersections of 228 m grading 0.49% CuEq and 212 m grading 0.44% CuEq. The results continue to confirm broad, near-surface copper-molybdenum-gold mineralization in the South Zone and support expansion of the resource ahead of updated studies and ongoing Phase 2 drilling.
Almaden Minerals and Almadex Minerals provided an update on their CPTPP arbitration claim against Mexico over the loss of the Ixtaca Project. The companies filed their Reply to Mexico’s Counter-Memorial and increased their damages claim to US$2.68 billion, citing the permit denial, concession suspension, and cancellation of mineral rights. Mexico’s Rejoinder is due in August 2026, with hearings scheduled for December 2026.
Silver Storm Mining reported new drill results from the C550 Zone at its La Parrilla Silver Mine Complex in Durango, demonstrating strong resource expansion potential. Results extended mineralization along strike and at depth, supporting future resource growth. The company also expanded its 2026 drill program by 9,000 metres as it advances toward a potential restart of operations at La Parrilla.
Heliostar Metals published its inaugural 2025 Sustainability Report, highlighting major advances in environmental stewardship, local employment, community investment, and responsible mining practices. Key highlights included over 90% water reuse, US$1.1 million in community investments, 17,468 native trees planted, and US$10.6 million paid in taxes and royalties. The report also emphasized Heliostar’s strong local impact, with 99% of employees and 97% of procurement spending based in Mexico.
Vizsla Silver strengthened its technical team by appointing Guillermo Hernandez as VP Exploration and promoting Jesus Velador to Chief Geologist. The leadership changes support the company’s transition from exploration to mine development at Panuco, while maintaining a strong focus on district-scale resource growth and future discoveries.
Riverside Resources and Questcorp Mining completed an expanded aeromagnetic drone survey at the La Union Project in Sonora, adding 248 km of high-resolution coverage to refine drill targets ahead of the fully permitted 2026 drill program. The survey improved imaging of concealed structures associated with potential CRD and Carlin-style mineralization, while drill road and pad construction is now underway
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