Sendero Resources launches next exploration phase at Peñas Negras copper-gold project in Argentina

Sendero Resources (TSXV: SEND) announces a 3,600-m Phase II drill program at its Peñas Negras Project in Argentina’s Vicuña Belt, targeting porphyry-type mineralization with strong discovery potential.

Sendero Resources Corp. (TSXV: SEND) has announced a comprehensive strategic and exploration update for its 100%-owned Peñas Negras Project, located in Argentina’s prolific Vicuña Belt—a globally recognized district hosting world-class copper-gold deposits such as Filo del Sol, Josemaría, and Lunahuasi.

Phase II drilling program set to begin in 2026

Following a transformative 2025, Sendero confirmed that it is preparing to launch a 3,600-meter Phase II drilling campaign aimed at testing a previously undrilled porphyry-type target with strong structural, geochemical, and geophysical indicators.

According to the company, the new program will focus on a 3.0 x 2.0-kilometer tract defined by fault structures, alteration patterns, and minor intrusions—features consistent with large-scale mineral systems typical of the Vicuña Belt.

“With Phase I complete, we now have multiple high-quality targets in one of the world’s most promising copper-gold belts,” said Alex Gostevskikh, CEO of Sendero Resources. “Our focus now shifts to drilling—the stage where true value is created. Peñas Negras gives our shareholders rare exposure to the next potential discovery in the Vicuña Belt.”

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Promising results from phase I exploration

Sendero completed 3,126 meters of core drilling across eight holes during Phase I, in addition to extensive magnetic, radiometric, and IP surveys. Key intersections include:

• 226 m @ 0.22 g/t AuEq from surface (Hole PNDH-001, La Peña)
• 266 m @ 0.52 g/t AuEq from 96 m (Hole PNDH-004, La Ollita)
• 364 m @ 0.51 g/t AuEq from 33.8 m (Hole PNDH-006, La Ollita)

These results confirm the presence of both porphyry and epithermal mineralization, aligning with other deposits along the Mogotes Fault corridor that defines the Vicuña Belt’s geology

Data integration and geological modelling

Throughout late 2024 and early 2025, Sendero conducted an in-depth integration of geophysical, geochemical, and structural datasets to develop a predictive mineral systems model. This model correlates strongly with regional geology, enhancing the accuracy of target generation and confirming district-scale potential.

The company’s exploration model envisions a gold-copper porphyry system with high-sulfidation epithermal affinities—a configuration analogous to nearby major deposits like Filo del Sol and Josemaría.

Strong local support and strategic position

The 211-square-kilometer Peñas Negras Project sits in central Vicuña, about 18 km southeast of Lundin Mining’s Caserones Mine, 24 km northeast of NGEx Minerals’ Lunahuasi Project, and 32 km north-northeast of BHP-Lundin’s Filo del Sol Project. The company reports firm support from the Provincial Government of La Rioja for upcoming field operations.

Next steps

Phase II drilling is expected to commence in Q1 2026, focusing on the high-priority targets identified through the company’s integrated geological framework. The objective: to advance Peñas Negras toward a discovery that could redefine the Mogotes structural corridor.