Canadian miner Lundin Gold (TSX: LUG) is advancing its Sandia copper-gold discovery toward a maiden resource estimate after identifying two additional porphyry systems, reinforcing the view that its Fruta del Norte mine in Ecuador is emerging as a district-scale mining camp.

The newly identified systems, named Sandia Northeast and Sandia Southeast, bring the total number of confirmed porphyry centres at Fruta del Norte from five to seven. The company now expects to publish a maiden resource for Sandia in early 2027, as the deposit continues to expand beyond its current footprint of approximately 1.6 km by 700 metres. A maiden resource estimate represents a critical inflection point for any discovery, as it is the first formal, auditable quantification of contained metal that can transition an exploration target into a potential mine-planable asset.

The two new discoveries extend a mineralized corridor of roughly 5 km alongside the operating mine. Sandia, first discovered in 2025, has grown to an interpreted footprint of about 1.6 km by 700 metres, reaching depths of approximately 1 km.

"Based on currently outlined dimensions, Sandia appears capable of supporting a maiden resource of approximately 500 million to one billion tonnes," Jefferies analysts said in a note on Wednesday, adding that the deposit remains open to the north, east, and at depth.

Long-Term Value Potential

The discoveries strengthen the perspective that Fruta del Norte could evolve into a broader copper-gold district, with multiple porphyry systems complementing its high-grade epithermal gold operation. Porphyry deposits of this scale are significant because they typically support multi-decade, bulk-tonnage mining operations with lower per-unit costs, making them among the most economically impactful deposit types in the industry. The copper-gold character of the Sandia system also aligns with growing global demand for copper driven by electrification and energy-transition infrastructure. Jefferies estimates that Sandia's current footprint could support an initial resource of roughly 500 million to one billion tonnes, though the final figure will depend on geological modelling, cut-off grades, and continuity.

If further drilling confirms the emerging scale, Sandia could underpin a large bulk-tonnage operation and materially extend the district's long-term production profile. Continued expansion could eventually allow Fruta del Norte to double current production levels within approximately five years, the analysts noted.

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Exploration Driving Valuation

The discoveries also redirect greater investor attention toward Lundin Gold's 55,000-hectare exploration land package, where sustained drilling continues to reveal additional porphyry centres alongside the company's flagship gold mine. Fruta del Norte, located in southeastern Ecuador's Zamora-Chinchipe province, remains a high-margin producer expected to deliver 475,000 to 525,000 ounces of gold annually, and is one of the largest private-sector mining operations in the country. According to Jefferies, exploration success is becoming an increasingly important driver of the company's long-term valuation, as the market begins to price in the potential of a second leg of production beyond the existing epithermal gold mine.