American West–Aston Bay Storm copper: pre-concentration design notes for plant engineers
Reviewed by Joe Ashwell
First reported on International Mining – News
30 Second Briefing
American West Metals and Aston Bay plan to use a combination of dry sensor-based ore sorting and wet jigging at the Storm copper project on Somerset Island, Nunavut, to shrink the planned concentrator footprint and throughput requirements. By rejecting waste before milling, the partners aim to cut capital for grinding and flotation circuits and simplify logistics for the remote Arctic site, where power, construction windows and shipping capacity are constrained. For geometallurgy and plant design teams, the move signals growing interest in integrated pre-concentration flowsheets for small, high-grade copper systems.
Technical Brief
- Ownership split is 80% American West Metals and 20% Aston Bay Holdings at Storm.
- Storm copper project is located on Somerset Island in Nunavut, implying severe Arctic logistics constraints.
- Dry sensor-based sorting will be deployed ahead of any wet processing, minimising water-dependent unit operations.
- Wet jigging is planned as the secondary pre-concentration stage, targeting density contrast between copper minerals and gangue.
Our Take
With American West Metals holding 80% and Aston Bay 20% of Storm, pre-concentration decisions are likely to be a key lever in JV value alignment, as they directly affect required concentrator scale, camp size, and the number of sealift shipments into this remote part of Canada.
In our recent copper project coverage, pre-concentration is most often trialled on low- to medium-scale assets rather than tier-one porphyry builds, suggesting Storm’s move could be aimed at proving a smaller, faster-to-market flowsheet that still clears Arctic cost hurdles.
Prepared by collating external sources, AI-assisted tools, and Geomechanics.io’s proprietary mining database, then reviewed for technical accuracy & edited by our geotechnical team.
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