Standard Uranium Ltd. (TSXV: STND) (OTCQB: STTDF) (FSE: 9SU0) has released detailed geological highlights from its summer 2026 drill program at the Davidson River Uranium Project in Saskatchewan's southwest Athabasca Basin, announcing that structural modelling has doubled the previously estimated width of the Thunderbird corridor to approximately 450 metres. The 6,734-metre program tested the Warrior, Bronco, and Thunderbird conductive trends across twelve drill holes. Investors may be watching the pending whole-rock geochemical assay results, which the company states have been submitted to SRC Geoanalytical Laboratories in Saskatoon and are not yet available.

Key Points

  • Standard Uranium Ltd. (TSXV: STND) is a uranium exploration company operating in the Athabasca Basin, Saskatchewan
  • Detailed core logging from the summer 2026 program has modelled 10 stacked graphitic shear zones forming a structural corridor approximately 450 metres wide along 2.8 kilometres of the Thunderbird Trend — double the pre-program estimate
  • Dravite-clay alteration confirmed across all three tested trends; anomalous radioactivity readings up to 1,650 cps recorded in drill hole DR-26-040; whole-rock geochemical assay results remain pending
  • Investors should watch for geochemical assay results and chlorite species confirmation from SRC Geoanalytical Laboratories

Thunderbird Corridor Architecture Revised After Core Logging

Oriented core measurements from five drill holes along the Thunderbird Trend reveal shear zones striking north-northwest and dipping steeply southwest. The company's geological team has modelled these as 10 stacked, steeply dipping graphitic shears forming a deep-seated structural corridor approximately 450 metres wide at the unconformity, more than doubling the pre-program model. Individual intersections include a 19-metre-wide brittle-ductile graphitic shear zone in DR-26-044 and a 10-metre-wide graphitic shear zone in DR-26-041. The release states the corridor remains open to the northeast, down-dip, and along strike.

Dravite-Clay Alteration Identified Across Warrior, Bronco, and Thunderbird Trends

Spectral analysis confirmed dravite alongside illite and kaolinite clays in five drill holes spanning all three tested trends. The company notes these assemblages are documented in alteration haloes of basement-hosted deposits along the Patterson Lake Corridor, characterising them as a key exploration indicator for the southwest Athabasca Basin. Kaolinite-rich alteration was logged more than 300 metres below the unconformity in drill holes DR-26-047 and DR-26-049. Magnesium-rich hydrothermal chlorite, possibly sudoite, was also identified along the Thunderbird Trend, with select samples submitted for species confirmation.

Anomalous Radioactivity Closely Associated With Structural Deformation

The release reports anomalous radioactivity readings closely linked to zones of structural deformation across the Bronco and Thunderbird trends. Readings of up to 1,650 cps were recorded in DR-26-040 within brecciated pegmatitic rock with disseminated pyrite and hematite alteration, approximately 5 metres above a brittle-reactivated graphitic shear zone. DR-26-047 returned up to 570 cps, and DR-26-043 recorded 320 cps within hematite-filled fractures in the central Thunderbird shear zone. The company cautions that scintillometer readings are not directly related to uranium grades and should be treated only as a preliminary indicator.

All Three Trends Remain Open as Assay Results Awaited

The company states all three tested trends remain open down-dip and along strike. Drill core samples have been submitted to SRC Geoanalytical Laboratories for whole-rock multi-element geochemical analysis, including partial-digestion for uranium and pathfinder elements. Results will be integrated with the structural model, alteration logging, and geophysics to prioritise follow-up targets. Davidson River hosts more than 70 kilometres of conductive strike across four main trends, and the company reports more than 60 kilometres of untested conductive strike length remains on the project. The immediate share price impact was not clear from available public information.