King River’s shallow gold at Mindoolah: open-pit potential and drilling notes for engineers
Reviewed by Tom Sullivan

First reported on Australian Mining
30 Second Briefing
King River Resources has reported a 79 per cent hit rate from phase 1 reverse circulation drilling at its Mindoolah gold project in Western Australia, with 15 of 19 first-pass RC holes intersecting significant gold mineralisation at an average depth of about 41m below surface. The shallow intercepts suggest potential for open-pit geometries and lower strip ratios if continuity is confirmed in follow-up drilling. Results will guide tighter-spaced RC and possible diamond drilling to define structure, grade distribution and metallurgical domains.
Technical Brief
- RC drilling method allows cost-effective coverage of shallow targets before committing to diamond coring.
- Shallow mineralisation geometry is suited to rapid follow-up with tighter-spaced RC fence lines.
- Early structural interpretation will focus on continuity of high-grade shoots within near-surface zones.
- Metallurgical domain definition from subsequent core drilling will be critical for oxide–transition–fresh processing design.
- Open-pit optimisation studies will hinge on confirming lateral continuity to support low strip-ratio pit shells.
- Similar shallow RC success in WA greenfields projects has often preceded rapid resource definition drilling campaigns.
Our Take
The earlier Mindoolah piece in our database (2 September 2026) flagged rock-chip grades up to 44.3g/t Au, so a 79 per cent success rate from first-pass RC drilling suggests the high-grade surface anomalism is translating into a laterally coherent subsurface system rather than isolated pods.
Within our 407 gold-tagged items, shallow intercepts at Western Australian projects like Mindoolah often underpin low-cost, rapid follow-up programmes, which can move juniors such as King River Resources more quickly towards maiden resource definition if continuity holds at depth.
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.
Related Articles
Related Industries & Products
Mining
Geotechnical software solutions for mining operations including CMRR analysis, hydrogeological testing, and data management.
CMRR-io
Streamline coal mine roof stability assessments with our cloud-based CMRR software featuring automated calculations, multi-scenario analysis, and collaborative workflows.
HYDROGEO-io
Comprehensive hydrogeological testing platform for managing, analysing, and reporting on packer tests, lugeon values, and hydraulic conductivity assessments.
GEODB-io
Centralised geotechnical data management solution for storing, accessing, and analysing all your site investigation and material testing data.