London-listed Arkle Resources PLC has commenced the second phase of drilling at its Onyofi Uranium Project in Namibia’s Erongo Region, targeting a maiden mineral resource estimate in 2027 following the discovery of uranium mineralisation during its initial exploration programme.
The company announced on Monday that it was mobilising a drilling rig to the project site for approximately 1,700 metres of reverse circulation (RC) drilling, with the programme expected to take three weeks.
The latest drilling campaign follows Arkle’s maiden exploration programme, which intersected uranium mineralisation in eight of nine drill holes at the uraniferous leucogranite (ULG) target on Exclusive Prospecting Licence (EPL) 8995.
According to the company, the discovery extends across an area measuring approximately 1.4 kilometres by 600 metres, with uranium mineralisation identified from surface to nearly 200 metres downhole.
The mineralised system remains open at depth, providing scope for further exploration.
“This drilling programme follows the Company’s uranium discovery confirmed by maiden drilling at the uraniferous leucogranite (“ULG”) target where uranium was intersected in eight of nine holes. Phase Two has been designed to test the ULG system at depth, at closer spacing and laterally beyond the current footprint, including the continuity of the higher-grade sheets, as the first step towards a maiden Mineral Resource Estimate in 2027,” the company said.
Arkle said the second phase would focus on determining the depth and lateral extent of uranium mineralisation, while testing the continuity of higher-grade zones identified during the initial drilling programme.
The company will also conduct downhole radiometric surveys and submit drilling samples for laboratory analysis to determine uranium grades.
“The programme comprises approximately 1,700 metres of reverse circulation (“RC”) drilling on the ULG target and is expected to take three weeks to complete. Holes will be surveyed with a downhole radiometric probe, as in the maiden programme, and samples will be submitted for laboratory assay, with results to be reported as they become available,” Arkle said.
Meanwhile, the company is continuing geological mapping, sampling and trenching across its exploration licences in the Erongo Region, with activities scheduled to continue throughout November.
The exploration work includes investigations of additional uranium targets on EPL 8290 and a large palaeochannel target on EPL 8298, where further ground geophysical surveys have been undertaken.
Arkle Chief Executive Officer Rory Harding, who is in Namibia overseeing the drilling programme, said the company was evaluating the results of its ongoing exploration activities.
“I am currently in Namibia assessing the results of the trenching programme underway across our licences and overseeing the start of this next phase of drilling,” Harding said.
Arkle acquired an 85% interest in Namibia Uranium (Pty) Ltd in January 2026, securing access to four exploration licences covering approximately 540 square kilometres in the Erongo Region.
The Onyofi Uranium Project is located adjacent to Orano’s Trekkopje mining licence.
The company is targeting the completion of a maiden mineral resource iestimate in 2027, subject to the results of its ongoing exploration and drilling programmes.
Arkle is also scheduled to host an investor webinar on 18 November 2026 to provide updates on the uranium discovery, exploration progress and its plans for resource estimation.
