Trilogy Metals Advances Arctic and Bornite Projects in Alaska's Ambler Mining District

Trilogy Metals Inc. (NYSE American: TMQ) (TSX: TMQ) is emerging as a key player to advance one of the most promising undeveloped copper districts in the U.S. as the world's need for reliable, ethically sourced copper, zinc and associated metals grows. The company is focused on advancing the Upper Kobuk Mineral Projects, located in the Ambler Mining District – a large, high-grade copper-dominant mineral belt in northwest Alaska. The district is being developed by Ambler Metals LLC, a 50-50 joint venture between Trilogy Metals and South32 Limited, formed to explore and develop the rich polymetallic resources of the region.

The two cornerstone deposits within this district are Arctic and Bornite. Arctic is considered one of the highest-grade copper-zinc-lead-gold-silver volcanogenic massive sulfide deposits known in the world, while Bornite is a significant copper-cobalt carbonate deposit with compelling scale potential. Both deposits are located within a land package that spans approximately 190,929 hectares. Exploration efforts have been focused on these two deposits in the Ambler Mining District – the Arctic VMS deposit and the Bornite carbonate replacement deposit.

The UKMP is located within the Ambler Mining District, which is one of the richest and most-prospective known copper-dominant districts in the world. It hosts world-class polymetallic volcanogenic massive sulphide deposits that contain copper, zinc, lead, gold and silver, and carbonate replacement deposits, which have been found to host high-grade copper and cobalt mineralization. Ambler Metals has an agreement with NANA Regional Corporation, Inc., an Alaska Native Corporation that provides a framework for the exploration and potential development of the Ambler Mining District in cooperation with local communities.

Trilogy's vision is to develop the Ambler Mining District into a premier North American copper producer while protecting and respecting subsistence livelihoods. The company holds a 50% interest in Ambler Metals LLC, which has a 100% interest in the Upper Kobuk Mineral Projects in northwestern Alaska. On Dec. 19, 2019, South32, a globally diversified mining and metals company, exercised its option to form a 50/50 joint venture with Trilogy. The latest news and updates relating to TMQ are available in the company's newsroom at https://ibn.fm/TMQ.

The development of these projects comes at a critical time as global demand for copper continues to rise, driven by electrification, renewable energy infrastructure, and technological advancements. The Arctic deposit's high-grade copper-zinc-lead-gold-silver composition and Bornite's copper-cobalt potential position these projects as strategically important for domestic supply chain security. The partnership with South32 provides significant technical and financial resources to advance these projects through exploration and potential development phases.

The ethical sourcing aspect of these projects is particularly significant given growing concerns about supply chain transparency and environmental standards in mineral extraction. The collaboration with NANA Regional Corporation ensures local community engagement and respect for subsistence livelihoods, addressing important social license considerations. This approach aligns with increasing investor and consumer demand for responsibly sourced minerals, particularly for metals critical to clean energy technologies and electric vehicle production.