Vancouver-headquartered Lundin Mining has released an initial mineral resource estimate for the sulphide deposit at Filo del Sol and updated estimates for the oxide deposit and the Josemaria project, confirming the Vicuña district as one of the largest undeveloped copper, gold, and silver resources globally.

The Vicuña mineral resource, held through a 50:50 joint arrangement with commodities major BHP, includes the Filo del Sol and Josemaria deposits in Argentina.

The resource estimate, which Lundin says ranks in the top ten of the largest producing copper mines in the world, includes 13-million tonnes of measured and indicated copper, with 25-million tonnes inferred; 32-million ounces of gold measured and indicated, and 49-million ounces inferred; and 659-million ounces of silver measured and indicated, with 808-million ounces inferred.

“Filo del Sol has been one of the most significant greenfield discoveries in the last 30 years and an amazing journey for all those that have been involved,” said president and CEO Jack Lundin. “Congratulations to the Filo team for such a remarkable discovery and advancing the deposit to where it is today.”

The company highlighted a high-grade core of 606-million tonnes at 1.14% copper equivalent at Filo del Sol and 196-million tonnes at 0.73% copper equivalent near surface at Josemaria. An oxide cap at Filo del Sol, amenable to lower capital expenditure heap leaching, includes 434-million tonnes at 0.34% copper, 0.28 g/t gold and 2.5 g/t silver.

Lundin Mining’s attributable copper resource base grew significantly with the update, marking a 29% increase in measured and indicated copper and a 650% increase in inferred copper.

“Highlighted in this release is not only the size and scale of Vicuña but also the high-grade core of the deposits,” said Lundin. “We see the potential for Vicuña to be not only a significant copper producer but also one of the world’s largest gold and silver mines as well.”

Drilling at Filo del Sol continues to intercept mineralisation at depth, and the nearby Flamenco zone has extended beyond current pit shell limits. A combined integrated technical report is expected in the first quarter of 2026.

BHP last year acquired Filo Corp, in partnership with Lundin Mining to gain ownership of Filo del Sol and Josemaria.