Manyingee North Uranium Deposit
The Manyingee North Deposit is contained within Cauldron’s Yanrey Uranium Project in Western Australia and is located approximately 4 kms to the northeast of Paladin’s Manyingee deposit, within an entirely separate northwards trending branch of the northwest trending Manyingee palaeochannel.
Manyingee North was discovered in 2025 by following up indications of uranium mineralisation in four historic exploration holes drilled in the 1980’s.
Mineralisation occurs below 90 m depth in association and below the lower carbonaceous clay unit. Mineralisation is hosted largely within gravelly coarse sands of the feldspathic Ashburton Member and occurs at numerous horizons spanning a combined interval of up to 22 m thick.
A total of 24 air-core holes for 2,953 m were drilled at Manyingee North in 2025 with every hole encountering mineralisation above the cut-off grade.
Mineralisation occurs over an area 650 m long and up to 1.4 km wide. Mineralisation remaining open in all directions, with airborne electromagnetic (AEM) and passive seismic survey showing a continuation of the main palaeochannel north for +8kms.
Cauldron has reported JORC complaint Mineral Resource Estimate (MRE) at Manyingee North of 14.9 Mt @ 297 ppm eU3O8 for 9.8 Mlbs at a 100 ppm eU3O8 cut-off[1].
[1] Refer CXU’s ASX announcement of 17 February 2026 titled “CXU adds 13.8Mlbs at Yanrey”
Manyingee North Cumulative GT (ppm*m) map
Mineralisation is assessed as likely being continuous with Paladin’s Manyingee Deposit, 4 kms to the south-west. Drilling planned for 2026 will likely confirm this.
Large resource with significant potential to grow. Mineralisation is open south, north and across the width of the palaeochannel.
Large resource with significant potential to grow. Mineralisation is open south, north and across the width of the palaeochannel.
Surveys have determined that the palaeochannel continues northwards for +8 kilometres
2026 Drilling has extended mineralisation south and north, with a majority of holes returning mineralisation above the cut-off grade
Manyingee North Resource Estimates
The maiden Mineral Resource Estimate (JORC 2012) for the mineralisation at Manyingee North was completed by Mr Dmitry Pertel, Principal Geologist of AMC Consultants Pty Ltd (AMC).
Mr Pertel completed the Mineral Resource Estimate. The Quality Assurance and Quality Control (QAQC) analysis was completed by Mr John Higgins, a full-time employee of Cauldron, assisted by Mr Robert Annett, a consulting geologist engaged by Cauldron. The conversion of downhole gamma grades to estimated eU3O8 grades was undertaken by Mr David Wilson, Principal Geoscientist with 3D Exploration.
Mr Pertel assumes Competent Person status for the reported Mineral Resources, Mr Higgins and Mr Annett assume Competent Person status for the QAQC analysis, and Mr Wilson assumes Competent Person for the reported eU3O8 grades. A site visit was completed by Mr Annett.
Each of Mr Pertel, Higgins, Annett and Wilson are a Member of the Australasian Institute of Geoscientists and have the necessary qualifications and relevant experience in the style of mineralisation at Manyingee North to qualify as Competent Persons under the JORC Code.
The Table below sets out grade-tonnage information with cut-off grades between 0 and 800 ppm eU3O8 which is considered useful for sensitivity analysis. The Mineral Resource classification applies to the 100 ppm cut-off grade.
Competent Person Statement
Mineral Resource Estimate – Manyingee North Deposit
The information in this report that relates to Mineral Resources for the Manyingee North Deposit is extracted from a report released to the Australian Securities Exchange (ASX) on 17 February 2026 titled “CXU adds 13.8Mlbs at Yanrey” and available to view at www.cauldronenergy.com.au and for which Competent Persons’ consents were obtained. Each Competent Person’s consent remains in place for subsequent releases by the Company of the same information in the same form and context, until the consent is withdrawn or replaced by a subsequent report and accompanying consent.
The Company confirms that is not aware of any new information or data that materially affects the information included in the original ASX announcement released on 17 February 2026 and, in the case of estimates of Mineral Resources, that all material assumptions and technical parameters underpinning the estimates in the original ASX announcement continue to apply and have not materially changed. The Company confirms that the form and context in which the Competent Persons’ findings are presented have not been materially modified from the original ASX announcement.