Basin Energy (ASX:BSN) has completed the structural relogging of 48 historical drill holes across its Björkberget and Virka green energy metals projects in North Sweden.
At Björkberget, 28 priority drill holes were logged, with 137 samples undergoing multielement analysis and another 71 samples awaiting shipment.
All Virka cores have also been relogged, with samples pending laboratory preparation.
The relogging has identified clear mineralised structural trends and alteration zones that will guide future drilling.
Re-analysis of high-grade uranium samples collected during 2024 field mapping confirmed exceptional results.
Sample BJK004 again exceeded detection limits, returning over 5.9% U₃O₈, while BJK008 returned 5.4% U₃O₈.
Both were taken from granite and rhyolitic boulders with visible yellow oxide staining.
These results validate the area's uranium potential and highlight underexplored mineral assemblages.
To date, 101 historical drill holes have been located, with work ongoing to understand the mineral systems through structural logging, radiometric scanning, and core photography.
The Björk core revealed brittle deformation with disseminated uranium, while Virka showed both brittle and ductile features, along with extensive hydrothermal alteration.
This comes amid proposed regulatory changes in Sweden to lift the uranium mining moratorium.
If passed, uranium will be treated as a concession mineral under the Swedish Minerals Act by January 2026, supporting exploration amid rising demand for critical minerals.
Managing Director Pete Moorhouse emphasised that relogging the historical core is a cost-effective strategy to unlock the full potential of the company's North Sweden portfolio.
At the time of reporting, Basin Energy's share price was $0.014.