What did PolarX (ASX:PXX) discover at its Alaska Range Project?

PolarX has identified a massive subsurface anomaly measuring 3.5 kilometres in diameter using 3D magnetic inversion modelling. This geophysical structure connects multiple existing targets, extending from the Zackly deposit under the Jupiter prospect toward the Gemini target.

What were the standout laboratory assay results for PolarX (ASX:PXX)?

The company collected 128 rock chip samples, yielding exceptional high-grade results across several prospects. The Mars prospect returned peak grades of 27.3% copper and 111 parts per million (ppm) silver from vein structures.

Why did PolarX's share price move on this news?

PolarX’s share price climbed because the combined geophysical and surface sampling results heavily upgrade the project's overall prospectivity. By linking individual prospects like Mars, Jupiter, and Gemini to a massive underlying anomaly, the data suggests a large, interconnected mineral system rather than small, isolated deposits.

How does this news change the investment thesis for PolarX (ASX:PXX)?

This development shifts PolarX from an early-stage explorer with fragmented targets into a highly prospective play targeting a unified, large-scale porphyry or intrusion-related system.

What are the main bull and bear points for PolarX (ASX:PXX) after these results?

The bull case centers on the exceptional surface grades, particularly the 27.3% copper at Mars, and the sheer 3.5km scale of the underlying geophysical anomaly. The bear case is that rock chip assays and magnetic models are leading indicators, not guarantees of commercial success.

Image for illustrative purposes only. Not a real photo.

PolarX shares surge on Alaska copper-gold discovery

Written by Brie CarterPublished May. 18 2026Last Updated May. 18 2026

Australian explorer PolarX (ASX:PXX) has sent its share price climbing after revealing geophysical and surface sampling results that point to a district-scale copper-gold system at its flagship Alaska Range Project.

Recent 3D magnetic inversion modelling has unveiled a mammoth subsurface anomaly stretching 3.5km in diameter.

The substantial structure extends north from the known Zackly magnetite skarn deposit, running directly beneath the Jupiter prospect and towards the Gemini target.

High-grade surface mineralisation directly overlies several magnetic offshoots believed to stem from this deeper, intrusive body, vastly upgrading the project’s potential for a large-scale, intrusion-related discovery.

The geological breakthrough is backed by formidable laboratory assays. PolarX collected 128 rock chip samples across multiple prospects, yielding widespread, high-grade copper and gold visualisations.

At the Mars prospect, standout assays reached an extraordinary 27.3% copper and 111 parts per million silver from oxidised chalcopyrite and bornite veins.

Meanwhile, the Jupiter prospect returned phenomenal results, including 7.39% copper alongside a glittering 18.883 grams per tonne of gold and 173ppm silver.

Other regional targets, including Phobos, Senator, and Gemini, also delivered highly encouraging mineralised values.

With historical data at Mars continuing to show pervasive high-grade veins and widespread disseminated copper, PolarX is looking at a highly prospective 1km by 1km footprint.

The company now plans to deploy a mobile magnetotelluric survey and meticulous geological mapping to lock in precise drill targets ahead of its highly anticipated upcoming exploration programme.

At the time of reporting, PolarX’s share price was $0.018.