American West eyes monster copper corridor at Storm

American West Metals has taken another major leap forward at its Storm copper project on Somerset Island in Nunavut, Canada after defining a monster 4.1km-long geochemical copper anomaly that mirrors the structural trend of its known Storm deposits. 

The newly coined Chevron prospect, identified through regional soil chemistry, spans up to 700 metres in width and is positioned within the same prospective Allen Bay Formation that hosts American West’s growing portfolio of copper deposits at Storm.  

Company geologists say Chevron ticks every box expected of a large, sediment-hosted copper system. The geometry is strongly suggestive of a structurally controlled corridor, potentially linked to deep-seated graben faults that act as fluid pathways in major copper districts. Crucially, it is completely untested, immediately elevating its ranking as one of the most significant exploration opportunities American West has identified since acquiring the project. 

The Storm project covers more than 2,200 square kilometres across the uninhabited Somerset Island in the Canadian Arctic. Despite the remoteness, the site boasts an airstrip, a 50-person camp and direct access to established shipping routes, making it one of the few large-scale Arctic copper prospects with genuine near-term development capability.  

The new Chevron anomaly sits within a broader regional pipeline of prospects that have been steadily delivering strong geological signals. At the Squall target, assays just received confirm additional zones of high-grade copper sulphides, in a geological setting similar to the Corona deposit 1.3km to the east. Results include 4.5m at 1.4% copper and 2.6g/t silver from 158.5m, with a higher-grade internal interval of 1.5m at 3.6% copper and 5g/t silver.  

Further west, sulphides have also been intersected in the Tornado area, expanding the prospective footprint along the Midway–Storm–Tornado structural corridor. The ongoing drilling continues to validate the idea that Storm is not a single deposit, but part of an emerging district-scale copper system with stacked horizons at shallow and moderate depths.  

Only weeks ago, American West revealed some spectacular drill numbers from the Cyclone copper deposit, including grades reaching 27.3% copper and 80g/t silver, further demonstrating the project’s ongoing capacity to deliver standout intercepts. With new soil data, drilling success and multiple geophysical anomalies aligning, the company now has a constantly growing portfolio of near-surface and deeper targets. 

Management says the Chevron anomaly could materially expand Storm’s current 17.5-million-tonne JORC resource of 1.2% copper and 3.4g/t silver, particularly as follow-up programs are already being planned. The discovery of a second large-scale structural corridor of equal magnitude to Storm itself is a rare development in sediment-hosted copper belts, and American West believes several more targets of interest now warrant testing. 

Dave O’Neil, Managing Director of American West said: “The Chevron area has no prior exploration, including geophysics, and therefore ranks as an outstanding new copper target, highlighting the potential for further large discoveries within the project area.”

Adding further momentum, results from the recent airborne mobile magnetotellurics survey have lit up a 16km conductive feature beginning just 200m below surface north of Cyclone. Another large, sheet-like conductor at 400m depth could correlate with copper horizons already hit in earlier diamond drilling. Two additional cross-cutting conductive bodies in the Midway and Tornado/Blizzard zones reinforce the potential for multiple stacked systems across the trend. 

Taken together, the combination of shallow high-grade hits, untested multi-kilometre anomalies, deep conductive bodies and multiple surface expressions of copper sulphides gives American West one of the most compelling exploration pipelines in the global junior copper sector. With copper now firmly on the US Critical minerals list and demand surging on the back of electrification, projects offering both shallow mining optionality and district-scale upside are now at a premium…….and it would seem that American West has just that.

Is your ASX-listed company doing something interesting? Contact: matt.birney@businessnews.com.au