Tintina Mines Limited Announces Positive Preliminary Economic Assessment with Pre-Tax NPV of US$ 560 million and 26-Year Mine Life

On February 2, 2026, Tintina Mines Limited (TTS) announced the results of a Preliminary Economic Assessment (PEA) for its 74%-owned Domeyko Sulfuros Copper-Gold Project in Chile. Key metrics include a 26-year mine life, a pre-tax NPV (8%) of US$560 million, and an after-tax NPV (8%) of US$328 million based on US$4.30/lb Copper and US$2,500/oz Gold. The project plans to process 35,000 tonnes per day (tpd) using 100% renewable energy and raw seawater. Total life-of-mine (LOM) production is estimated at 2.1 billion lbs of copper and 1.5 million oz of gold.

The news is material and positive as it provides the first formal economic validation of the Domeyko Sulfuros project. However, a critical analysis reveals a significant "Junior Developer Gap": - Initial Capital Expenditure (Capex) is estimated at US$1.283 billion. This is roughly 28 times the company's current market capitalization. - The project is 74% owned, meaning TTS must find a way to finance its share of a massive build or face significant dilution/partnership requirements. - The use of raw seawater and 100% renewable energy is a strategic positive for Chilean permitting, likely reducing environmental friction. - The 26-year mine life provides long-term optionality, but the high initial capex relative to the after-tax NPV (US$328M) suggests a low NPV/Capex ratio, which may make traditional debt financing difficult without a major partner.

Tintina Mines focuses on the Domeyko Sulfuros Copper-Gold Project in the Atacama Region, Chile. The project is located at a low altitude, 60 km from the coast, and adjacent to the Pan-American Highway, providing excellent infrastructure access. The company also holds a 100% interest in the Wark Township property in Ontario and a 10% net profit royalty on a property in the Sudbury Mining District held by Exador Resources.