Maronan Metals Delivers Strong Silver Grades in Infill Drill Programme
Key Takeaways
- Thirteen new drill holes from the 2026 infill programme confirm strong silver-lead mineralisation across both the Western and Eastern Horizons at the Maronan Underground Project, with standout intercepts including 11.0m at 10.3% lead and 116g/t silver, and 2.0m at 4.2% lead and 533g/t silver.
- The 40,000m infill drilling programme has now passed 15,000m completed, with two rigs currently on site exceeding planned performance over the past three months.
- A third drill rig has been delayed until at least October due to Australia-wide rig demand, introducing some near-term pace risk to the programme's second half.
- A formal resource update is targeted for Q4 FY2027, designed to convert Inferred resource to Indicated classification within the Starter Zone and directly enable completion of the Pre-feasibility Study (PFS) targeted for mid-2027.
- Mineralisation on both the Eastern and Western Horizons remains open down-plunge, representing upside to the current resource not yet captured in any formal estimate.
Infill drilling delivers high-grade silver-lead results across Maronan deposit
Maronan Metals (ASX:MMA) has released a substantial new batch of assay results from its ongoing 40,000m infill drilling programme at the Maronan Underground Project in northwest Queensland. The deposit is described as one of Australia’s largest and highest grade undeveloped silver deposits. Results covering 13 drill holes from the 2026 programme confirm strong silver-lead mineralisation across both the Western and Eastern Horizons, with the data expected to feed a resource update planned for Q4 FY2027 and ultimately support the completion of a Pre-feasibility Study (PFS).
Standout intercepts from this release include:
- MRN26013 Western Horizon: 11.0m (8.5m estimated true width) at 10.3% lead, 116g/t silver from 351.0m — very strong mineralisation was intersected
- MRN26015 Eastern Horizon: 1.9m at 22.4% lead, 100g/t silver and 6.8m at 7.1% lead, 211g/t silver
- MRN26013 Eastern Horizon: 2.0m at 4.2% lead, 533g/t silver from 491.4m — a standout silver grade result
- MRN26017 Eastern Horizon: 13.0m (8.7m estimated true width) at 2.9% lead, 127g/t silver from 70.0m
Richard Carlton, Managing Director
“The Maronan ore-body is behaving predictably as we continue to close up the drill spacing and de-risk the project… Results from this detailed work are further refining our geological model which will feed into a resource review and pre-feasibility study in the middle of 2027.”
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Q4 FY2027 resource update in sight as programme passes the 15,000m mark
The programme is gathering pace. More than 15,000m of the planned 40,000m has now been completed, with two rigs currently operating on site. Plans to add a third rig have been delayed until at least October due to Australia-wide demand for drill rigs, though the two active rigs have exceeded planned performance over the past three months.
Each rig is now focused on a different part of the deposit:
- Programme scale: 40,000m planned, with more than 15,000m completed to date
- Current rig count: 2 on site; addition of a third rig delayed until at least October
- Rig productivity: Both rigs exceeded planned performance over the past three months
- Northern rig: Has commenced infill drilling the North Fold hinge area
- Second rig: Targeting the Copper Zone and Eastern Horizon in the central part of the deposit
- Next milestone: Resource update targeting Q4 FY2027, feeding into PFS completion mid-2027
High-grade copper-gold results from the Maronan Project have added a polymetallic dimension to what was previously understood primarily as a silver-lead system, with the Copper Zone now being actively targeted by the second rig operating in the central part of the deposit.
The consistency of results across multiple holes — spanning both mineralised horizons and different parts of the deposit — is significant. It suggests the ore body is responding predictably to tighter drill spacing, which is exactly what the programme is designed to demonstrate.
Understanding infill drilling and what it means for investors
If you’re tracking Maronan’s progress, it helps to understand what infill drilling actually does and why the resource classification system matters for your investment thesis.
Infill drilling is the process of drilling additional holes between existing holes to tighten the spacing between data points. Tighter spacing gives geologists greater confidence in how mineralisation is distributed between holes. That increased confidence allows them to upgrade a mineral resource from a lower classification to a higher one under the JORC Code — the Australian standard for reporting mineral resources.
Here’s how the classification system works in plain terms:
| JORC Classification | Drill Spacing | Confidence Level | Supports |
|---|---|---|---|
| Inferred | Wide (100m+) | Lower | Scoping studies |
| Indicated | Tighter (50m or less) | Higher | Pre-feasibility studies |
| Measured | Very close | Highest | Definitive feasibility, mine planning |
Maronan’s current programme is specifically designed to convert Inferred resource to Indicated within the “Starter Zone.” The resource update is a key milestone in enabling the completion of the PFS.
A PFS is a material de-risking milestone for any mining project. It provides independent analysis of project economics, mine design, and processing viability — and it is the document the market uses to assess whether a project has genuine development potential. The geological context adds further relevance: Maronan hosts two parallel silver-lead mineralised horizons (Western and Eastern), described in the announcement as being of a similar style to the Cannington deposit, which the source describes as “one of the world’s largest silver and lead producing operations.”
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What comes next — resource update, PFS, and the path to development
Several near-term catalysts are now in view for investors tracking this project:
- Assay results are pending for multiple holes including MRN26018, MRN26020, MRN26023, MRN26024, and MRN26025 through MRN26035, with further results expected as the programme progresses
- Resource update is planned for Q4 FY2027
- PFS completion is targeted for mid-2027
- A third drill rig is expected to join the programme from at least October, which should accelerate metreage through the programme’s second half
- Mineralisation on both the Eastern and Western Horizons remains open down-plunge, representing upside potential not yet captured in the current resource
Maronan has indicated it intends to complete between 35,000 to 40,000m of surface drilling over the next 12 months, while simultaneously advancing the PFS-level study in parallel. The scale of that combined commitment signals meaningful investment in project advancement.
For investors, the pattern of results matters as much as any individual intercept. Consistent, predictable intersections across a large number of holes reduces geological uncertainty and strengthens the case for resource classification upgrades. Managing Director Richard Carlton’s observation that the ore body is “behaving predictably as we continue to close up the drill spacing” is a notable signal of confidence ahead of the formal resource update.
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