Tivan’s Walshy’s Wall drilling: subsurface targets and RC plan for mine planners
Reviewed by Tom Sullivan

First reported on Australian Mining
30 Second Briefing
Tivan has secured final regulatory and heritage approvals to start maiden drilling at the Walshy’s Wall target within the Sandover Fluorite Project in the Northern Territory, with a staged programme of 31 reverse circulation holes scheduled from October. Walshy’s Wall, a manganese–barite gossan discovered by Tivan geologists in October 2025, will be tested for subsurface continuity and grade using RC to penetrate the weathered profile efficiently. Early results will guide follow-up step-out drilling and resource definition across the broader fluorite–manganese system.
Technical Brief
- RC drilling allows dry sample return in friable gossan, improving recovery versus diamond coring.
- Compressed air circulation will minimise fluid interaction with barite–manganese minerals, preserving geochemical signatures.
- Staged programme structure enables rig redeployment between pads, reducing mobilisation costs across the lease.
- Heritage clearance implies drill pad and access track locations have been micro-sited to avoid cultural sites.
- Regulatory approvals confirm environmental controls for drill cuttings, hydrocarbon storage and groundwater protection are in place.
- RC chips from weathered horizons can be rapidly logged and assayed, accelerating follow-up targeting decisions.
- For similar greenfields gossans, short RC fences across strike are becoming standard for early continuity testing.
Our Take
Tivan’s focus on fluorite at Walshy’s Wall aligns with its Speewah fluorite project in Western Australia, suggesting the company is building a multi-asset fluorite position rather than treating Sandover as a one-off exploration play.
With several recent Northern Territory items in our database involving Tivan’s Molyhil tungsten project and NT Government co-funding, the Sandover Fluorite Project adds another NT exploration front that could benefit from the same supportive permitting and co-funding environment if early results are positive.
The 31-hole RC programme at Walshy’s Wall, combined with fluorite, manganese and barite prospectivity, positions Sandover as a potential polymetallic target that could diversify Tivan’s revenue options beyond the tungsten and fluorite streams already featured in its other projects.
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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