Cosa Resources Corp. (CVE: COSA) (OTCMKTS: COSAF) has expanded three uranium exploration projects in Saskatchewan’s Athabasca Basin after acquiring six additional mineral claims.
The new claims add 2,669 hectares across the Murphy Lake North, Darby and Orion projects. The properties sit near several major uranium discoveries and producing mines. Meanwhile, the acquisitions aim to secure extensions of conductive geological trends associated with uranium mineralization.
Two of the projects operate as joint ventures with Denison Mines Corp. (TSE: DML) (NYSE American: DNN). Cosa holds a 70 per cent interest and operates both projects, while Denison owns the remaining 30 per cent.
Additionally, the companies expanded the Darby project with two claims totaling 758 hectares. The ground extends Darby’s northern boundary near the Tucker Lake uranium zone.
Geophysical surveys previously identified a conductive structure known as the Delta trend in that area. However, explorers have not yet drilled the target.
The joint venture plans to test the conductor during a first-pass drilling program potentially starting in the second half of 2026.
Furthermore, survey data suggests the nearby Echo trend may continue into the newly acquired claims. Cosa purchased the Darby claims from a third party for a small cash payment without royalties.
Meanwhile, the company added three claims covering 345 hectares at the Murphy Lake North project. Workers secured the ground through low-cost staking south of the Cyclone trend.
Cosa drilled Murphy Lake North in 2025 and intersected altered sandstone and structural features above graphitic basement rocks. Consequently, geologists believe the structures could indicate proximity to uranium mineralization.
Read more: Cosa Resources advances joint venture uranium projects with Denison backing
Read more: Denison Mines announces joint exploration venture with Cosa Resources
Cosa expanded its Orion project by 1,564 hectares
The company plans to begin additional drilling at Murphy Lake North in the first quarter of 2026. In addition, crews will complete DC-resistivity surveys before a larger summer drill campaign.
Cosa also expanded its wholly owned Orion project by acquiring a 1,564-hectare claim. The property sits about 29 kilometres west of Cameco Corporation‘s (NYSE: CCJ) (TSE: CCO) Cigar Lake uranium mine.
Additionally, geophysical modeling identified strong basement conductivity near the edge of the project area. Historical datasets from the Saskatchewan government also mapped a conductor in the same location.
Furthermore, the conductive feature lies within a magnetic high that may indicate favourable structural conditions. Cosa acquired the Orion claim from a third party for a small cash payment with no royalties attached.
Company executives said the claims capture potential extensions of conductive trends and strengthen exploration coverage across the eastern Athabasca portfolio. Meanwhile, drilling continues at Darby as the company advances multiple uranium targets across the region.
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