Tinkas needs more infill work to form a resource, but five fresh drill targets at Condor may be the bigger story
There is a distinction that matters in uranium exploration. Drilling that confirms mineralisation is progress. Drilling that creates a formal resource estimate is value. When a company itself says further infill work may be required before a resource can be established, investors need to read the announcement carefully to find where the real forward-looking news actually sits.
Deep Yellow Limited (ASX:DYL) released its March quarter exploration update covering two programs across Namibia and the Northern Territory. At the Tinkas Prospect in Namibia, the company completed a 133-hole reverse circulation drilling program totalling 1,363m, confirming uranium mineralisation in 38 holes. The standout intersections include 11m at 265 ppm eU3O8 from hole TUBR1296 and 4m at 244 ppm eU3O8 from TUBR1335. For context, eU3O8 refers to equivalent uranium oxide grade, a measure derived from downhole gamma logging rather than direct chemical assay.
The issue is that average mineralised thickness across Tinkas is approximately 2m. That is narrow, and Deep Yellow has flagged that further infill drilling will likely be needed before a formal resource can be defined. That shifts our attention to the Alligator River Project in the Northern Territory, where a seismic survey over the Condor Prospect has identified five priority drill targets, with drilling targeted to commence in Q2 2026.
Why Tinkas Mineralisation Exists but a Resource Does Not
The Tinkas program targeted calcretised palaeochannel sediments approximately 8km north-west of Deep Yellow’s flagship Tumas Project. Drilling confirmed uranium in the channel sediments and in fractured basement rocks below, consistent with Tumas geology and suggesting the broader area carries structural potential.
Mineralisation exceeding 100 ppm equivalent uranium grade was intersected in 38 of the 133 holes. At an average thickness of 2m and an average grade of 174 ppm eU3O8 across those intersections, Tinkas currently lacks the continuous width needed to efficiently define a compliant mineral resource.
Deep Yellow has confirmed that its 2026 Namibia exploration focus will shift to the S-Bend Prospect and Aussinanis Project, which tells us management has made a considered decision to prioritise areas with stronger near-term resource potential rather than pursue further infill at Tinkas in the near term.
Condor’s Seismic Result and Why Ranger-Style Geology Changes the Upside Equation
The Alligator River Project sits within the same uranium province as the Jabiluka and Ranger deposits, which together account for over 750 million pounds of historical uranium endowment. Condor is modelled on an unconformity-hosted deposit style, meaning uranium mineralisation is found where ancient basement rocks meet younger sedimentary layers along fault structures, which is the same geological setting that defines Ranger.
A critical barrier to drilling Condor has been up to 200m of highly conductive Cretaceous cover that made conventional geophysical methods unreliable as a drilling guide. Deep Yellow engaged Fleet Space to run a high-resolution reflection seismic program, with the Northern Territory Government co-funding A$100,000 through the Resourcing the Future 2025 initiative.
The seismic data clearly mapped the cover thickness and identified several prospective fault structures in the basement, producing five priority drill targets. That is a genuinely meaningful de-risking of the drilling program because it focuses effort on the most geologically compelling areas rather than drilling on broad statistical spacing.
The Investors’ Takeaway for Deep Yellow
Tinkas is not the near-term catalyst investors were hoping for. The drilling confirmed mineralisation exists, but without a resource estimate on the horizon from this program alone, it does not materially advance the development story.
The more forward-looking catalyst is Condor. Five seismically-defined drill targets in a Ranger-style province is a genuine reason to stay engaged with the exploration story at Alligator River. If drilling commences in Q2 2026 as planned and returns strong intersections, it could reshape how the market prices Deep Yellow’s exploration portfolio beyond Tumas.
The risk, as always in early-stage exploration, is that promising targets do not always convert into economic deposits, and Condor may require multiple campaigns before any deposit picture becomes clear. More coverage of ASX uranium and mining stocks is available at stocksdownunder.
