Tusker Minerals Unveils 2.6 Billion Tonne Douala Basin Rutile Exploration Target

Douala Basin Puts Tusker Minerals on the Global Rutile Map with a 2.1–2.6 Billion Tonne Exploration Target

Tusker Minerals (ASX: TSK) has reported a JORC (2012) Exploration Target of 2.1–2.6 billion tonnes at 2.1–2.3% total heavy minerals (THM) for the Diwong South Deposit within its Douala Basin rutile exploration target in Cameroon. According to the ASX announcement, the target includes indicative in situ grades of 0.3–0.35% rutile and 0.06–0.07% zircon, placing the project among the larger emerging rutile-bearing heavy mineral sands systems reported in Africa.

The scale matters, but so does the context. The Exploration Target covers only the modelled ~152 km² Diwong South area, which Tusker said represents about 6% of its broader 2,580 km² Douala Basin Project. That leaves a large amount of basin tenure outside the current model, while early reconnaissance drilling elsewhere has already identified near-surface rutile-zircon mineralisation at grades above the current target range.

"The Douala Basin Exploration Target is a game-changing milestone for Tusker, establishing genuine multi-billion-tonne scale within a shallow, infrastructure-advantaged rutile-zircon system," said Cliff Fitzhenry, Chief Executive Officer.

The Numbers That Define the Douala Basin Exploration Target

The headline figures in the announcement are set out below.

The company stated that the Exploration Target was prepared in accordance with the JORC Code (2012 Edition) by Mineral Technologies, using a domain-constrained block model across two mineralised settings: upper aeolian plateaus and lower colluvial valleys.

That distinction is important because it shows the target is not based on a single isolated zone. Instead, the announcement describes a laterally extensive mineralised sand package with two coherent domains that can be modelled separately and then combined.

It is also important to note Tusker's cautionary language. The company stated that the potential quantity and grade of the Exploration Target is conceptual in nature, that there has been insufficient exploration to estimate a Mineral Resource, and that it is uncertain whether further exploration will result in a Mineral Resource.

Why This Mineral Assemblage Stands Out

Many heavy mineral sands projects are largely built around ilmenite, which is a titanium-bearing mineral but typically lower value than natural rutile as a feedstock. However, in Tusker's announcement, the modelled mineral assemblage for the Douala Basin rutile exploration target in Cameroon shows a markedly different mix.

According to the company, the modelled grand total assemblage is approximately:

• 15% rutile
• 3% zircon
• 70% kyanite
• 11% combined ilmenite and altered ilmenite

This means rutile materially exceeds ilmenite within the modelled heavy mineral suite. For investors, that matters because rutile is typically regarded as the premium natural titanium feedstock, valued for its high titanium dioxide content and lower downstream processing requirements relative to ilmenite.

Zircon adds a second potentially valuable product stream. It is commonly used in ceramics, refractories and zirconium chemicals, and in mineral sands projects it can improve product mix if recoveries and concentrate quality are suitable.

What About Kyanite?

The other notable feature is kyanite, which Tusker said makes up around 70% of the modelled THM assemblage. The company has not assigned economic value to kyanite at this stage, and the announcement is clear that recovery, product quality and commercial potential remain subject to further testwork and market assessment. Furthermore, the scale of the kyanite component makes it a variable worth watching in future technical work.

Understanding Heavy Mineral Sands, Rutile and THM

For newer investors, heavy mineral sands announcements can be hard to interpret because the key metrics differ from hard rock mining.

THM, or total heavy minerals, is the proportion of heavy mineral material within the bulk sediment. In simple terms, if a sand sample contains 2.2% THM, about 2.2% of that material is made up of dense minerals that can potentially be recovered.

Key Minerals in the Assemblage

Those heavy minerals can include several different products. In the Douala Basin announcement, the main reported components are:

• Rutile: a natural titanium dioxide mineral and a premium titanium feedstock
• Zircon: a zirconium silicate mineral often sold into ceramics and industrial markets
• Ilmenite: a common titanium mineral that usually needs more upgrading than rutile
• Kyanite: an industrial mineral used in high-temperature refractory applications

Exploration Target vs. Mineral Resource Estimate

An Exploration Target is also different from a Mineral Resource Estimate (MRE). An Exploration Target is an early-stage, conceptual statement of potential size and grade. An MRE requires enough drilling density, geological confidence and technical support to classify mineralisation under JORC categories such as Inferred, Indicated or Measured.

That means the Douala result should be viewed as an indication of potential scale, not as a defined resource. The investment relevance lies in whether follow-up drilling and testwork can convert parts of this target into a maiden JORC resource.

Reconnaissance Drilling Points to Higher-Grade Upside Beyond Diwong South

The ASX update did not only contain the Exploration Target. It also summarised initial reconnaissance auger drilling across additional targets within the broader Douala Basin tenure. Several holes returned continuous mineralisation from surface at rutile grades above the 0.3–0.35% rutile range used as the indicative grade band in the current Exploration Target.

The strongest interval reported was 3.2m at 0.76% rutile and 0.08% zircon from surface in hole RHRAU0035, which is roughly double the upper end of the current Exploration Target rutile range. Tusker also highlighted a peak internal interval of 1.0m at 0.86% rutile and 0.12% zircon in RHRAU0033.

On the Edéa-Sud permit, the company reported 2.6m at 12.5% HM from surface in RHRAU0002, including 0.37% rutile.

These results are significant because they are outside the current Diwong South Exploration Target. In other words, they do not merely confirm what is already modelled. They suggest the broader basin may contain additional mineralised areas, including some near-surface zones with stronger rutile grades than those implied by the current conceptual target.

How Douala Compares with Other Rutile and Mineral Sands Projects

Tusker's announcement placed the Douala Basin rutile exploration target in Cameroon alongside several large global mineral sands and rutile projects. While these comparisons should be treated cautiously due to differences in project stage, cut-off assumptions and classification, they help frame the scale now being discussed.

*HiTi leucoxene basis, according to Tusker's comparison table.

The main investor takeaway is not that Douala is directly equivalent to more advanced projects. It is that a conceptual target covering only part of the tenure already implies 7–8 million tonnes of contained rutile, which is large enough to attract market attention if later drilling supports conversion to a formal resource.

Infrastructure Is a Central Part of the Investment Case

According to the ASX announcement, parts of the project lie as close as ~10 km from the Port of Douala, with broader licence areas within 25–50 km of established roads, grid power, skilled labour, telecommunications, an international airport and export infrastructure.

For mineral sands projects, logistics can be a major determinant of development economics. Bulk products are sensitive to transport costs, and remote projects often face higher capital requirements because roads, power or port access must be built or extended.

Tusker's update argues that Douala Basin benefits from a shorter logistics chain than many inland African projects. The announcement states that these attributes have the potential to reduce development complexity, logistics costs and execution risk relative to more remote peer assets.

"Douala Basin has the potential to be a genuine company-maker for Tusker. This Exploration Target delivers multi-billion-tonne scale at an early stage, combined with a high-quality rutile-rich titanium mineral suite and one of the best infrastructure positions of any large African mineral sands project," said Daniel Smith, Executive Chairman.

The Route from Exploration Target to Maiden JORC Resource

The company has outlined a clear next step in the announcement: move from conceptual scale toward a maiden JORC Mineral Resource Estimate. According to Tusker, the near-term technical programme is expected to focus on:

1. Priority infill and step-out drilling on the upper aeolian plateau zones
2. Deeper drilling below the historical ~18–24m depth limit where mineralisation remains open
3. Expanded mineralogical and metallurgical testwork on rutile, zircon and kyanite recovery and product characteristics
4. Updated geological and block modelling as new drilling results are incorporated

The company stated that it is targeting a maiden JORC Mineral Resource Estimate within approximately 6–9 months, subject to drilling outcomes, permitting, assay turnaround and technical results.

That timeline matters for investors because a maiden resource is often the point where an early exploration concept begins to be evaluated on a more formal basis. If Douala can move from an Exploration Target to even a partial JORC resource on the stronger supported zones, it would provide a more concrete basis for valuation and development comparisons.

Why Investors May Keep Tusker Minerals on Watchlists

The Douala Basin update stands out for several reasons that are all directly grounded in the ASX announcement. Taken together, they present a compelling early-stage picture for the Douala Basin rutile exploration target in Cameroon.

• Scale: The current Exploration Target is already measured in billions of tonnes
• Project footprint: The target covers only ~6% of the total Douala Basin tenure
• Mineral mix: The assemblage is rutile-rich, rather than being dominated by ilmenite
• Regional upside: Reconnaissance drilling outside Diwong South has returned higher-grade near-surface rutile intervals
• Infrastructure: The project sits near port, road and power infrastructure
• Near-term catalyst: Management is targeting a maiden JORC MRE within 6–9 months

Taken together, the announcement presents Douala Basin as a large-scale early-stage rutile-bearing mineral sands system with both basin-wide growth potential and a defined pathway toward resource conversion. The next phase of drilling and testwork will be central to determining whether that conceptual scale can be translated into a formal JORC resource and, over time, a clearer development case.

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