The prospect, which is just 3km from the operating five million ounce Florida Canyon gold mine, delivered a jaw-dropping 3m at 371 grams per tonne gold and 143.5gpt silver within a wider bonanza zone of 9.1m at 124.36gpt and 48.6gpt silver from 27m.
The hole continued into a lower grade zone assayed at 73m at 0.28gpt from 36.6m, with the hole ending in in Carlin-style mineralisation.
The drilling, 100m south of the artisanal Champion workings, terminated at 110m due to technical issues.
Another hole returned 43m at 0.3gpt gold, including 26m at 0.48gpt gold associated with a 59m at 3.5gpt silver zone from 3m.
Of the 10 holes completed, nine were either drilled away from the bonanza vein or ended before they could have tested it.
The drilling has now defined Carlin-style gold and silver mineralisation throughout the tested part of the soil anomaly, with the prospect open and largely untested for the extension of bonanza grade veins.
PolarX said it was encouraged by the potential of Star Canyon to host a mix of high-grade gold and silver veins within a potentially bulk mineable system, sitting within a world-class precious metals province.
Much of the larger anomaly remains untested, so the company has decided to accelerate further drilling at Star Canyon, and at the nearby Ridgeline target.
The area saw narrow vein mining between 1865 and 1927.
The explorer has primarily focused on advancing its Zackly and Caribou Dome projects in Alaska in recent years but added claims in Nevada to allow it to explore while weather prohibits it from operations elsewhere.
A scoping study for its Alaska Range interests is expected in the near term.
The company has more than A$3 million in cash following a recent raising at 2.1c.
