PolarX Ltd. May 18 reported that strong geophysics and copper-gold samples collected along a trend that extends for more than two miles north of the Zackley deposit indicate the potential for a large intrusion-related mineral system at the Stellar end of its Alaska Range project.
Lying just north of the Denali Highway, and approximately 160 miles northeast of Anchorage, PolarX’s 22-mile-long Alaska Range land package comprises three primary groups of claims – Caribou Dome, Senator, and Stellar.
Much of the Australian explorer’s work over the past couple of years has focused on Caribou Dome, a deposit toward the southwest end of the land package that hosts 7.2 million metric tons of measured, indicated, and inferred resources averaging 3.1% (495 million pounds) copper and 6.5 grams per metric ton (1.5 million oz) silver.
The Zackly skarn deposit, which lies about 13 miles to the northeast, hosts an additional 4 million metric tons of indicated and inferred resources averaging 1.1% (99 million lb) copper, 1.6 g/t (213,000 oz) gold, and 12.6 g/t (1.6 million oz) silver.
A scoping study updated in 2024 outlines plans for a 750,000-metric-ton-per-year centralized mill at Caribou Dome that would process ore from both deposits.
New magnetic inversion modeling of geophysical data from surveys flown over the Stellar property has identified a large magnetic body that extends north from the Zackly skarn deposit into the Jupiter and Gemeni target areas.
Surface sampling has returned high-grade copper-gold mineralization that coincides with magnetic apophyses – anomalies that extend toward the surface that could represent veins or other formations carrying magnetic minerals from the underlying body – along the two-mile-long trend. Highlights from the surface sampling include (south to north):
• 4.04 g/t gold and 2.3% copper (Zackley).
• 0.42 g/t gold and 0.92% copper (Zackley).
• 18.88 g/t gold and 7.39% copper (Jupiter).
• 0.94 g/t gold and 1.08% copper (Jupiter).
• 1.2 g/t gold and 7.8% copper (Jupiter).
• 0.15 g/t gold and 1.05% copper (Gemini).
PolarX says this mineralization, associated magnetic anomalies. and skarn mineralization outlined at Zackley are indicative of a large underlying mineralized intrusive system.
The company also reported that high-grade copper mineralization was identified in samples collected from the Mars-Phobos target area roughly 3.5 miles west of Jupiter. Highlights from samples collected from this area include:
• 0.02 g/t gold and 4.53% copper (Phobos).
• 0.22 g/t gold and 11.85% copper (Phobos).
• 0.06 g/t gold and 8.98% copper (Mars).
• 0.16 g/t gold and 27.3% copper (Mars).
• 0.16 g/t gold and 5.4% copper (Mars)
To help refine drill targets, PolarX plans to carry out a mobile magnetotelluric geophysical survey over the Jupiter-Gemini corridor in June.
https://www.miningnewsnorth.com/story/2026/05/22/news-nuggets/signs-of-a-larger-orebody-at-alaska-range/9680.html