Chalice Western Australian expansion: resource scale signals for mine planners
Reviewed by Joe Ashwell

First reported on Australian Mining
30 Second Briefing
Chalice Mining has defined a 2.5km-long, strong and coherent copper–molybdenum–silver soil anomaly at its West Yilgarn project in Western Australia, while advancing infill and extensional drilling at the Gonneville nickel–copper–PGE deposit near Perth. The new anomaly, identified through systematic soil geochemistry, sits along strike from existing targets and will be followed up with RC and diamond drilling once access and heritage clearances are in place. For geologists and resource modellers, the work signals potential scale beyond the current Gonneville resource envelope and a broader polymetallic footprint in the district.
Technical Brief
- For similar mafic–ultramafic systems, the combination of soil geochemistry and step-out drilling is now standard targeting practice.
Our Take
Chalice Mining’s work at the Gonneville deposit sits within a small subset of our 285 copper- and molybdenum-keyword pieces that focus on polymetallic soil anomalies, which often progress to deeper geophysics and drilling once coherent trends exceed 1–2km in length.
The recent hiring of Odin Partnership to advise Chalice on advancing its 23‑year critical minerals asset base suggests that any 2.5km copper–molybdenum–silver anomaly near Gonneville will be evaluated not just geologically but also for how it fits a portfolio-level strategy aimed at attracting larger strategic investors or partners.
Within our 1202 Mining stories, Western Australian copper coverage is still dominated by iron ore and gold operators, so systematic copper–molybdenum–silver exploration in WA gives Chalice a relatively differentiated critical‑minerals narrative in a jurisdiction better known for bulk commodities.
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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