Pinnacle Silver & Gold Corp ( TSX-V:PINN , OTCQB:PSGCF , FRA:P9J ) is planning a 16-hole diamond drilling program at its Potrero project in Durango, Mexico, to test a potential extension of the nearby Topia mine system.
The Phase 1 program will cover 1,876.5 metres across four zones on the Maria Fernanda 2 (MF2) concession, targeting silver, gold, lead and zinc mineralization identified earlier this year.
"Having conducted extensive mapping and sampling on the MF2 concession, we now believe that this polymetallic mineralization is an extension of the Topia Mine system, only four kilometres to the southwest," said CEO Robert Archer.
"The exciting discovery of high-grade gold-silver-lead-zinc mineralization earlier this year demonstrated the district scale potential of the Potrero Project."
Pinnacle said structures on the MF2 concession are intermittently exposed along a 1,500-metre strike length. The surface elevation ranges from approximately 2,200 to almost 2,400 metres, compared with typical mineralization depths below 1,900 metres at Topia.
The company said the elevation difference suggests the MF2 mineralization may be well preserved.
The planned drilling will test four target areas. Paulina Breccia will receive four holes totalling 437 metres, while Las Guasimas will be tested with four holes covering 616.5 metres. Five holes totalling 595 metres are planned at Matavacas, with a further three holes covering 228 metres at Jaelyn.
At Las Guasimas, grab samples collected from an artisanal mine dump returned grades of up to 3.21 grams per tonne gold, 349 g/t silver, 3.49% lead and 5.30% zinc.
Pinnacle said the concession benefits from existing infrastructure, with a road and power line running through the property.
Alongside the MF2 work, the company plans to send a small geological crew to the northern El Potrero claim block for mapping and sampling around the Minas Nuevas zone. Silver-rich veins there have returned assays of up to 1,159 g/t silver.
The company said the discoveries followed ground exploration guided by an airborne LiDAR survey flown in November 2025.
Pinnacle plans to submit a drill permit application within two weeks and expects a response within 90 days. If approved on that timeline, drilling could begin in the first quarter of 2027.
The company said favourable results from the MF2 program would support a larger follow-up campaign to delineate the mineralization.
