Kantra’s Nugent copper-gold extension: geometry, resource and design notes for engineers
Reviewed by Tom Sullivan

First reported on Australian Mining
30 Second Briefing
Kantra Copper has intersected 70m at 1.18 per cent copper and 0.24g/t gold from 507m downhole in underground hole 26KVUG0949, extending mineralisation below the current Nugent resource envelope at the Kanmantoo copper mine in South Australia. The company cautions that the interval is not true width due to drill angle, so further step-out and infill drilling plus updated geometry modelling will be needed before resource tonnages and mine design can be revised.
Technical Brief
- Geometry uncertainty will force tighter structural and grade-domain modelling before any reserve conversion.
- Step-out drilling is expected to target both lateral continuity and down-plunge extensions of the Nugent lode.
- Infill drilling density will need to increase sufficiently to upgrade classification from Inferred to Indicated.
- Any future mine design changes will likely focus on deeper level access, ventilation and materials handling capacity.
- For similar brownfield orebodies, such underground step-outs can materially alter cut-off grade and stope sequencing.
Our Take
A 70m run at 1.18% copper from 507m depth at Nugent suggests Kantra Copper may be delineating an underground extension that could leverage existing Kanmantoo copper mine infrastructure rather than requiring a greenfield build.
Within our 1248 Mining stories, copper–gold pieces linked to South Australia are relatively sparse compared with WA and Queensland copper coverage, so this Nugent update stands out as one of the few deeper underground intersections in that state in the recent database.
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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