Cauldron Energy Quadruples Strike Length at Manyingee North to 4km
Cauldron quadruples strike at Manyingee North as first 2026 drill results hit high-grade uranium
Cauldron Energy (ASX: CXU) has reported high-grade uranium results from the first 14 aircore holes (26YRAC001–26YRAC014) of its 2026 drill campaign at the Yanrey Uranium Project, extending mineralisation at the Manyingee North deposit to approximately 4,000m strike. The 2,500m northward extension and ~550m southward extension onto the recently acquired E08/2896 tenement represent a quadrupling of strike length from the ~670m envelope covered by the 2025 Inferred Mineral Resource Estimate. Mineralisation remains open in all directions.
All 8 holes drilled at Manyingee North within tenement E08/1489 returned mineralisation above cut-off grade, confirming the broad, consistent nature of the deposit. The company framed the results as a strong start to the 2026 campaign, with the extended strike creating a clear pathway to materially grow the current 9.8 Mlb eU3O8 resource.
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Breaking down the standout intercepts
The highest-grade hits came from holes targeting the northern extension of the deposit. Hole 26YRAC009 returned 0.96m @ 646.9 ppm eU3O8, while 26YRAC014 delivered 1.74m @ 644.9 ppm eU3O8. Additional strong results included 26YRAC007 (0.66m @ 519.1 ppm eU3O8), 26YRAC008 (0.60m @ 405.7 ppm eU3O8), and 26YRAC013 (0.66m @ 398.7 ppm eU3O8).
The high-grade zone in the channel centre—typically 300–400m wide—has been extended 800m further north and remains open. This zone represents the most prospective target for continued resource growth.
| Drill Hole | Interval (m) | Grade (ppm eU3O8) | From (m) | Zone |
|---|---|---|---|---|
| 26YRAC009 | 0.96 | 646.9 | 98.04 | Manyingee North |
| 26YRAC014 | 1.74 | 644.9 | 91.58 | Manyingee North |
| 26YRAC007 | 0.66 | 519.1 | 98.86 | Manyingee North |
| 26YRAC008 | 0.60 | 405.7 | 95.03 | Manyingee North |
| 26YRAC003 | 0.98 | 353.7 | 78.06 | E08/2896 |
| 26YRAC002 | 0.50 | 301.4 | 61.11 | Cosgrove |
Southern extension on the newly acquired Wyloo tenement
Four holes drilled on E08/2896, acquired from Wyloo Metals on 18 May 2026, extended mineralisation ~550m south of the 2025 resource envelope. Due to Aboriginal heritage constraints, these holes were restricted to disturbed areas and access tracks along the southeastern channel margin. The high-grade centre-channel zone remains untested and will be prioritised following heritage clearance scheduled for late September to early October 2026.
Best results from E08/2896 included 26YRAC003 (0.98m @ 353.7 ppm eU3O8) and 26YRAC006 (0.54m @ 243.9 ppm eU3O8). Both holes intersected mineralisation at approximately 60m depth associated with oxidised sandstones, interpreted as the northward continuation of Paladin’s B-roll-front.
Cosgrove Prospect keeps delivering
Two new holes at the Cosgrove Prospect (26YRAC001 and 26YRAC002) extended mineralisation over a 1.2km width, remaining open to the north and south. Mineralisation has now been intersected in 3 of 5 exploration holes at the prospect. The best result came from 26YRAC002, which returned 0.50m @ 301.4 ppm eU3O8.
Management stated the prospect warrants further drilling to potentially define a resource. Additional drilling will form part of the heritage clearance planned for late September 2026.
Why palaeochannel uranium at Yanrey matters
Palaeochannel uranium deposits form in ancient buried river channels where uranium precipitates at redox fronts—zones where groundwater chemistry shifts between oxidised and reduced states. These deposits are well-suited to low-cost In-Situ Recovery (ISR) mining, a process where uranium is dissolved underground and pumped to the surface without traditional open-pit or underground excavation.
Grades reported in this announcement are radiometric equivalents (eU3O8), measured by downhole gamma logging. Chemical assay confirmation will be conducted during subsequent diamond drilling.
Broad, consistent, open mineralisation across multiple palaeochannels supports the potential for significant resource scale. Cauldron currently holds 55.6 Mlbs eU3O8 across three defined deposits:
- Bennet Well — 30.9 Mlbs eU3O8 (38.9 Mt @ 360 ppm, 150 ppm cut-off)
- Manyingee South — 14.9 Mlbs eU3O8 (21.2 Mt @ 319 ppm, 100 ppm cut-off)
- Manyingee North — 9.8 Mlbs eU3O8 (14.9 Mt @ 297 ppm, 100 ppm cut-off; MRE per CXU 17 February 2026)
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The investment thesis and the road ahead
The extension of Manyingee North’s strike from ~670m to beyond 4,000m points to significant scope for resource growth. The 2025 Inferred Mineral Resource Estimate of 9.8 Mlbs covers a fraction of the deposit’s newly defined footprint, and the high-grade core zone remains open along strike.
CEO Jonathan Fisher highlighted the macro tailwind, referencing positive uranium sentiment and developments in Australia–India uranium arrangements. He noted the company’s focus on demonstrating the prolific nature and scale of the Yanrey Project.
What’s next
- ~5,000m aircore drilling at Manyingee North
- ~4,000m at Manyingee South
- ~1,000m at Cosgrove Prospect
- Drilling ongoing at Manyingee North; programme may extend subject to time and weather
- Heritage clearance scheduled for late September–early October 2026 to unlock centre-channel high-grade targets on E08/2896
- Step-out drilling at Bennet Well (West) and testing of 20+ untested palaeochannels identified across the project
- Passive seismic surveying continues to define new targets
CEO Jonathan Fisher
“The 2025 maiden mineral resource estimate at Manyingee North (of 9.8M Lb eU3O8) covered a drilling envelope with a strike length of just ~670m, and with our drilling thus far we have extended this beyond 4kms – a huge increase in strike length, so it is clearly evident that the Manyingee North Deposit will grow significantly and so we look forward to continuing to drill further there during the campaign.”
The rig remains active, with further results anticipated as the campaign progresses.
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