Iceni’s 591m Diamond Drilling Confirms Complex Shear Zones at Guyer
Iceni Gold’s latest diamond drilling at the Guyer prospect within its 14 Mile Well Project has refined the understanding of gold mineralisation controls, confirming structural complexity and leaving key targets open for further exploration.
- Two-hole diamond drill program completed at Guyer totaling 591m
- GUYDD0009 confirms continuity of narrow shear-hosted gold mineralisation in granite
- GUYDD0010 reveals distal volcaniclastics position, altering geological model
- Structural controls dominate gold mineralisation, with complex shear zones identified
- Further drilling planned to test untested primary targets and depth extensions
Diamond Drilling Advances Understanding at Guyer
Iceni Gold Limited (ASX – ICL) has released results from a focused two-hole diamond drilling campaign at the Guyer prospect, part of its flagship 14 Mile Well Gold Project in Western Australia. Completed in December 2025, the 591-metre program targeted two high-priority zones identified in earlier drilling, aiming to test mineralisation continuity and refine the geological framework.
The first hole, GUYDD0009, drilled into the granite-hosted Guyer Main area, intersected multiple narrow quartz-filled shear zones with gold mineralisation consistent with previous significant intercepts. These stacked shears, although narrower and locally discontinuous compared to earlier holes, confirm the presence of structurally controlled mineralisation within a complex fault corridor. This supports the interpretation of a major hydrothermal system with multiple mineralised splays or faults.
Revised Geological Model at Guyer South
The second hole, GUYDD0010, drilled at Guyer South, intersected a thick sequence of altered intermediate volcanics belonging to the Welcome Well Formation. Contrary to prior assumptions of a porphyry contact, geochemical analysis revealed a continuous basaltic to andesitic volcaniclastic succession. Although gold assays were lower than anticipated, the hole is interpreted to have intersected a distal part of the mineralised system, leaving the primary target untested due to hole deviation.
This new geological insight has materially altered the understanding of the mineralisation controls in the area, highlighting the importance of structural zones and rheological contrasts within the volcanic sequence that may localise gold mineralisation. Iceni plans further drilling to test the untested primary targets and to explore depth extensions suggested by the structural complexity.
Strategic Context and Next Steps
Guyer lies within the 14 Mile Well Project, strategically positioned between the established gold mining centres of Leonora and Laverton. The project benefits from a $35 million farm-in agreement with Gold Fields Australia, which has become a significant shareholder in Iceni. The Guyer Trend itself extends over 11.5 kilometres along a granite-greenstone contact, with geophysical data indicating a broad shear zone corridor hosting multiple mineralised structures.
Historical workings nearby and recent drilling results underscore the prospectivity of the area. Iceni’s Managing Director Wade Johnson emphasised that the new drilling results have materially improved the geological model and that ongoing structural interpretation will guide future targeting. The company is preparing for follow-up drilling campaigns to test the continuity of mineralisation at depth and along strike, aiming to unlock the full potential of this emerging gold system.
Bottom Line?
Iceni’s evolving geological insights at Guyer set the stage for targeted drilling campaigns that could unlock significant gold resources.
Questions in the middle?
- Will follow-up drilling confirm the continuity and economic viability of the narrow shear zones?
- How will the revised geological model influence exploration strategies across the broader 14 Mile Well Project?
- What timeline and budget has Iceni allocated for the next phase of drilling and resource evaluation?
