True North: A Look at the Development of the Most Northerly Base Metal Mine in the World – by Ailbhe Goodbody (CIM Magazine – February 19, 2026)

Why It Matters

Polaris demonstrates that economically viable base‑metal deposits can be developed in extreme Arctic conditions, influencing future resource strategies as demand for zinc and lead grows.

Key Takeaways

• Located at 75°23′N, world’s northernmost base‑metal mine.
• Discovered 1971, first drill hole hit Polaris orebody.
• Reserves: 20 Mt @ 3.8% Pb, 14.3% Zn.
• Additional 3 Mt inferred at slightly lower grades.
• MVT deposit indicates carbonate-hosted, low‑temperature formation.

Pulse Analysis

The Polaris zinc‑lead underground mine, perched on Little Cornwallis Island at 75°23′ N, holds the distinction of being the world’s most northerly base‑metal operation. Its origins trace back to a 1964 Cominco option on Bankeno Mines’ showings, followed by a seven‑year reconnaissance program that culminated in a 1971 drilling campaign. The first hole intersected the Polaris orebody, confirming a Mississippi Valley‑type (MVT) deposit in one of the planet’s harshest environments. This early success demonstrated that viable mineralization could be accessed far beyond traditional latitudes.

The deposit comprises roughly twenty million tonnes grading 3.8 % lead and 14.3 % zinc, with an additional three million tonnes inferred at slightly lower grades. Such grades are competitive for primary zinc and lead producers, especially given the low‑cost, carbonate‑hosted nature of MVT systems. The ore’s mineralogy—dominantly sphalerite and galena—facilitates straightforward beneficiation, while the underground mining method reduces surface disturbance in the fragile Arctic tundra. These technical attributes have kept Polaris on the radar of both legacy miners and new Arctic‑focused ventures.

Polaris also serves as a case study for the logistical and regulatory hurdles of high‑latitude mining. Ice‑bound sea routes, limited daylight, and the need for self‑sufficient infrastructure raise capital costs, yet climate‑driven sea‑ice retreat is gradually expanding access windows. Moreover, Indigenous partnerships and stringent environmental assessments shape project timelines. As global demand for zinc—driven by renewable‑energy infrastructure—continues to rise, the Polaris model may inform future developments across the Canadian North and other polar regions.