Arkle Resources has started mobilising a drilling rig to its Onyofi uranium project in Namibia’s Erongo Region for a 1,700-metre drilling programme expected to take three weeks, following the discovery of uranium mineralisation in eight of nine holes drilled during its initial exploration campaign.
The London-listed company said the second phase of drilling at the Onyofi Project, located on Exclusive Prospecting Licence (EPL) 8995, will investigate the depth and lateral extent of the uranium-bearing system, including the continuity of higher-grade mineralised zones.
The programme forms part of Arkle’s preparations to produce its first Mineral Resource Estimate for the project in 2027.
Arkle announced the uranium discovery on 13 October 2026 after its maiden drilling programme identified mineralisation across a footprint measuring approximately 1.4 kilometres by 600 metres.
Uranium was intersected in eight of the nine holes drilled at the project’s uraniferous leucogranite (ULG) target, with mineralisation extending from the surface to almost 200 metres downhole.
The mineralised system remains open at depth, indicating that its full extent has not yet been established.
The company said the latest programme will involve approximately 1,700 metres of reverse circulation drilling, with holes positioned to test deeper mineralisation, reduce spacing between existing drillholes and investigate extensions beyond the area already drilled.
Particular attention will be given to determining whether the higher-grade uranium-bearing sheets identified during the initial programme continue across the deposit.
Drillholes will be surveyed using downhole radiometric equipment, while samples will be submitted for laboratory analysis to determine uranium concentrations.
Arkle said results will be released as they become available.
Alongside the drilling at Onyofi, Arkle is continuing a mapping, sampling and trenching programme across its Namibian exploration licences.
The work began in late September and is scheduled to continue throughout November.
It includes further investigation of uranium targets beyond the initial discovery area, particularly an extensive leucogranite target on EPL 8290.
The company has also completed three additional lines of horizontal loop electromagnetic (HLEM) ground geophysical surveying on EPL 8298 during the past week.
The surveys are intended to map a large palaeochannel target in the north-eastern part of the licence.
Arkle said results from the mapping, sampling, trenching and geophysical programmes will be reported in due course.
The exploration work is intended to identify additional targets across the company’s licence package while the second drilling programme establishes the extent of the Onyofi discovery.
Arkle chief executive Rory Harding is currently in Namibia overseeing the fully funded drilling programme and assessing results from exploration work across the company’s licences.
“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.
The company plans to use results from the second drilling phase to guide further work towards a maiden Mineral Resource Estimate in 2027.
Such an estimate would provide an initial assessment of the quantity and grade of uranium mineralisation identified at Onyofi, subject to sufficient drilling and geological information.
Arkle has not yet announced a mineral resource for the discovery.
Harding is scheduled to host an investor presentation on Wednesday, 18 November 2026, at 11:00 GMT, to discuss the discovery, the latest drilling programme and the company’s plans for further exploration.
The presentation will also cover the results of the initial drilling campaign, additional leucogranite and palaeochannel targets and developments in the uranium market.
Arkle said investors will be able to submit questions before and during the presentation, with a recording to be made available on its website.
The company’s immediate priority remains the completion of the three-week drilling programme at Onyofi and assessment of the results to determine the next stages of exploration ahead of the proposed 2027 resource estimate.
