Welcome to Aldebaran Resources
Aldebaran Resources owns an 80% interest in the Altar copper-gold project in mining-friendly San Juan province, Argentina, having earned into the project from Sibanye-Stillwater. Aldebaran is led by a management team with a track record of success, and is advancing Altar with strategic partners including South32, Route One Investment Company and Rio Tinto. In November 2024, an updated Mineral Resource Estimate (MRE) positioned Altar as one of the largest undeveloped copper projects in the world, and in October 2025, a Preliminary Economic Assessment (PEA) was released for Altar, outlining a 48-year mine life. Aldebaran is now advancing Altar through PFS in 2026.
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Altar Copper Gold Project
San Juan Province, Argentina
The Altar copper-gold project hosts a cluster of porphyry deposits in San Juan, Argentina, which Aldebaran is expanding through exploration and development to deliver to the rising copper market. The 2024 pit-constrained resource for the main Altar deposit, which consists of the Altar Central, Altar United, and Altar East porphyry centres, has 22.01 billion lbs copper, 5.08 million oz gold and 93.76 million oz silver in the Measured and Indicated categories, plus 9.83 billion lbs copper, 1.71 million oz gold and 49.04 million oz silver in the Inferred category. A Preliminary Economic Assessment (PEA) for Altar released in October 2025 reported a 48-year mine life, after-tax NPV (8%) of US$2 billion, and an IRR of 20.5%. Aldebaran plans to release a Pre-Feasibility Study (PFS) for Altar in 2026.
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