Cauldron Energy Lifts Yanrey Uranium Exploration Target to 269Mlbs

Cauldron Energy Lifts Yanrey Uranium Exploration Target to 89.7Mlbs to 269.0Mlbs

Cauldron Energy (ASX: CXU) has reported a revised JORC 2012-compliant Exploration Target of 89.7 million pounds to 269.0 million pounds eU3O8 at its wholly owned Yanrey Uranium Project in Western Australia, materially expanding the scale of the project's uranium upside. According to the ASX announcement, the target is defined across 30 discrete prospective areas on the western portion of the company's tenement package and sits in addition to Cauldron's existing mineral resource inventory of approximately 55.6Mlbs eU3O8.

For investors following Australian uranium exploration, the update is material for two reasons. First, it gives a quantified view of the project's broader upside beyond currently defined resources. Second, several of these targets are due to be drill tested in the 2026 drilling season, which the company said was expected to begin in the coming week, subject to weather.

Revised Exploration Target Materially Expands Yanrey's Potential Scale

In the announcement, Cauldron outlined a revised Exploration Target for the western portion of Yanrey ranging from 130Mt to 390Mt at grades of 294ppm to 604ppm eU3O8, for contained metal of 89.7Mlbs to 269.0Mlbs eU3O8.

The revised target incorporates information gained from:

• 2024 and 2025 drilling programmes
• 2024, 2025 and 2026 passive seismic surveys
• Review of historical exploration data
• Tenements acquired around Paladin Energy's Manyingee Uranium Deposit

The company also made clear that the Exploration Target excludes mineralisation already converted into JORC resources. That is important because it means the published target is not double counting the existing resource base.

Existing resources at Yanrey currently total 55.6Mlbs eU3O8 across three deposits.

On a simple combined basis, the existing JORC resource and upper-end Exploration Target point to a conceptual uranium inventory of more than 324Mlbs eU3O8. That is not a resource figure, but it helps explain why the market is likely to focus on the project's scale.

"This exploration target for the western portion of Cauldron's tenement holding at Yanrey is the result of a significant amount of work that Cauldron has conducted over the last couple of years to expand our understanding of the Yanrey Uranium Project," said Jonathan Fisher, CEO of Cauldron Energy.

"When considered alongside the existing JORC resource base at Yanrey, this suggests Yanrey has the potential to be amongst one of the largest uranium projects globally."

Yanrey Already Sits Within a Uranium-Rich Province

The announcement places Yanrey within a broader uranium district extending more than 150km, from the Carley Bore Uranium Deposit in the south to the Spinifex Well Uranium Prospect and beyond in the north. Furthermore, Cauldron said its tenure covers over 80km of this prospective trend across approximately 1,493km².

The broader Yanrey Province already hosts close to 100Mlbs eU3O8 in defined resources across multiple operators, according to the company.

This provincial context matters because exploration targets are inherently conceptual. A large number on its own does not guarantee economic mineralisation. What gives the target more relevance is that it sits within a district where multiple deposits have already been defined and where Cauldron has already delineated three separate resources.

Understanding ISR Uranium and Why Yanrey Attracts Attention

A central part of the Yanrey investment case is its association with in-situ recovery (ISR) uranium. In the announcement, Cauldron repeatedly referred to the district as hosting uranium mineralisation considered amenable to ISR mining methods.

What Is ISR Mining?

ISR, sometimes also called in-situ leaching, is a mining method used for certain uranium deposits hosted in permeable, water-bearing sediments. Instead of removing rock through conventional open pit or underground mining, fluids are circulated through the mineralised zone underground and the dissolved uranium is recovered at surface for processing.

In simple terms, ISR targets the uranium where it sits in the ground rather than excavating the host rock.

For non-specialist investors, the practical relevance is that ISR projects are often assessed for:

• Lower upfront capital intensity than conventional mining
• Smaller surface disturbance
• Potentially simpler mine layouts where geological conditions are suitable
• Sensitivity to groundwater conditions, permeability and chemical recovery performance

That last point is important. A deposit being described as ISR-amenable does not mean development is automatic. Hydrogeology, recovery chemistry and field testing remain critical steps.

Why Does Yanrey Appear Suited to ISR?

According to the announcement, uranium mineralisation at Yanrey is hosted in shallow, unconsolidated Cretaceous palaeochannel sandstones. A palaeochannel is an ancient buried river or estuary system. These channel sands can host uranium where groundwater movement and chemistry caused the metal to concentrate.

Cauldron's existing resources at Bennet Well, Manyingee South and Manyingee North have all been evaluated on the basis of potential ISR extraction. The nearby Manyingee deposit, owned by Paladin, is another reference point in the same broader system.

The company also highlighted the role of redox fronts, which are chemical boundaries in groundwater systems where uranium can accumulate. For investors without a geology background, these fronts are a key targeting tool because they often mark where uranium has been deposited within the channel sediments.

How Cauldron Built the New Exploration Target

The 30 target areas were generated using a combination of airborne electromagnetic surveys, passive seismic work, historical drilling and analogy with known deposits in the district.

The methodology outlined in the announcement included:

• Mapping palaeochannels and tributaries from geophysical data
• Selecting the centre of each interpreted channel as the likely mineralised position
• Assigning a best-fit analogue deposit to estimate likely grades
• Applying a semi-qualitative discount factor based on geological confidence
• Applying an arbitrary plus or minus 50% tonnage variance to reflect uncertainty

That final point is worth emphasising. An Exploration Target is not a mineral resource. It is an estimate of potential quantity and grade based on geological interpretation and limited supporting data. The company explicitly stated there has been insufficient exploration to estimate a Mineral Resource for the target areas and it is uncertain whether further work will lead to one.

Key Targets in the 30-Area Pipeline

While the total number is large, several individual targets stand out in the announcement because of their size, proximity to known deposits or limited historical testing.

Target 1: Manyingee North Extension

Target 1 is the northward continuation of the Manyingee North Mineral Resource Estimate, which the company said is not closed out. It is estimated at 15.89Mt to 24.17Mt and uses Manyingee North as its geological analogue.

Its relevance is straightforward. Extensions to existing resources can be easier for the market to assess than isolated greenfields targets because they build on known mineralisation.

Target 8: Manyingee West

Target 8 is described as the westward extension of the Manyingee redox front in a deeply incised channel of more than 200m. The target is estimated at 8.71Mt to 13.24Mt, with historical anomalous results already present in the area.

Target 29: MOAT Central

Target 29, called MOAT Central, is one of the largest conceptual targets in the inventory. It is estimated at 11.41Mt to 15.10Mt and sits within a newly identified Yanrey palaeochannel confirmed by passive seismic.

This target appears significant because the channel has been mapped geophysically but has not yet been drill tested. That means it could become an important catalyst if the upcoming programme confirms mineralisation.

Cosgrove Targets

The Cosgrove area also features prominently. Initial scout drilling in 2025 reportedly intersected mineralisation in 2 of 3 holes, and the company plans further drilling in Q3 2026. Multiple targets in the Cosgrove system add another layer to the project's exploration pipeline.

Drilling Catalysts Scheduled for 2026 and Beyond

In the announcement, Cauldron set out an active work programme that extends beyond the immediate drill season.

The diamond drilling component is particularly relevant because it is intended to provide material for metallurgical and disequilibrium testing. Metallurgical testing assesses how uranium may be recovered during processing, while disequilibrium testing checks the relationship between radiometric readings and actual uranium concentration. Both are important technical steps in uranium project evaluation.

Execution Record Supports Market Interest

One of the more investable aspects of the announcement is Cauldron's recent exploration conversion record. Since recommencing drilling, the company has reported three new uranium discoveries over the last two drill programmes:

• Manyingee South, discovered in 2024 and now reported at 14.9Mlbs eU3O8
• Manyingee North, discovered in 2025 and now reported at 9.8Mlbs eU3O8
• Cosgrove, where early drilling in 2025 intersected mineralisation in 2 of 3 holes

The company also noted that the 2024 Exploration Target for Manyingee South was 6.5Mlbs eU3O8, while the resulting mineral resource later came in at 14.9Mlbs. That does not guarantee similar outcomes elsewhere, but it does provide some evidence that the exploration model has so far been productive.

Why the Revised Target Matters to ASX Uranium Investors

For investors assessing Cauldron Energy ASX news, the importance of this announcement lies in the combination of scale, district context and near-term news flow.

The project now comprises:

• 55.6Mlbs eU3O8 in existing JORC resources
• A revised Exploration Target of 89.7Mlbs to 269.0Mlbs eU3O8
• 30 target areas across the western tenements
• A tenure position covering over 80km of prospective trend
• An imminent 2026 drilling programme

That said, the market will still need drilling to move conceptual upside into reportable resources. The next value inflection points are therefore likely to come from drill testing of selected targets, Cosgrove follow-up work, Bennet Well resource update drilling and technical studies tied to ISR development potential.

On the information released to ASX, Cauldron has provided a larger and more structured picture of Yanrey's uranium potential. However, the revised Exploration Target does not change the conceptual nature of those figures. It does, in addition, give investors a clearer framework for assessing just how large the project could become if upcoming drilling continues to convert targets into resources.

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