Pampa Metals step out drilling intersects 152m at 0.40% Cu, 0.23 g/t Au at the Piuquenes Central Cu-Au deposit

Exploration interest remains high across the belt, with major global miners like BHP, Rio Tinto, South32, and Teck actively pursuing projects in the area.

Pampa Metals Corp. has announced significant results from step-out diamond drilling at the Piuquenes Central copper-gold deposit, part of its flagship Piuquenes Project in San Juan, Argentina.

Drill hole PIU-05 (2025DDH), located well south of previous drill locations, intersected a continuous zone of porphyry-style mineralization, confirming the southern extension of the deposit. The drill hole returned a broad interval of:

• 152 meters at 0.40% Cu, 0.23 g/t Au, and 2.15 g/t Ag (from 530m depth)
• Including: 50 meters at 0.50% Cu, 0.29 g/t Au, and 2.36 g/t Ag (from 596m)

These grades are associated with moderate to intense quartz stockwork veining and strong potassic alteration within diorite porphyry host rocks.

PIU-05: a major step-out from historic intercepts

This latest hole is located 220 meters east of PIU16-01DDH, which returned 558m @ 0.38% Cu and 0.42 g/t Au, and 270 meters southwest of PIU02-2024DDH, which intersected 448m @ 0.42% Cu and 0.46 g/t Au. The 418-meter mineralized interval in PIU-05 averaged 0.27% Cu and 0.12 g/t Au, indicating a broad and consistent mineral system.

Notably, the higher-grade intervals from 530m depth show increased bornite content, a copper sulfide mineral often linked to enhanced economic potential. While chalcopyrite is more prevalent across the Piuquenes system, bornite’s presence in high-grade zones could significantly improve project economics. Ongoing studies aim to better understand the controls and distribution of bornite mineralization.

PIU-08: additional potential on the horizon

Further upside comes from hole PIU-08, collared 370 meters northwest of PIU-05, which has also intersected visible porphyry-style mineralization. Assay results are pending and expected to enhance geological modeling of the southern margin of the Piuquenes Central system.

President and CEO Joseph van den Elsen commented:

“We are very pleased to have extended the Piuquenes Central system to the south, with hole PIU-05 reporting broad intervals of porphyry-style mineralization, including excellent high-grade sections. Additionally, PIU-08 has encountered strong porphyry-style mineralization, and we eagerly await results. We are also excited about the initial assays from holes PIU-06 and PIU-07 at the newly discovered Piuquenes East system.”

Piuquenes Project: a strategic asset in a premier copper district

Located in the heart of Argentina’s San Juan province, the Piuquenes copper-gold porphyry project sits directly north of Aldebaran Resources’ Altar project and within the prolific Miocene porphyry belt. The region is home to world-class deposits including El Pachón (Glencore), Los Azules (McEwen Mining), and the Los Pelambres mine (Antofagasta plc).

Exploration interest remains high across the belt, with major global miners like BHP, Rio Tinto, South32, and Teck actively pursuing projects in the area.