Critical One Energy has announced new assay results from its Howells Lake Antimony-Gold Project in Ontario, Canada, showing a high-grade antimony intersection and visual extension of stibnite mineralisation.
The project lies approximately 120km west of the Ring of Fire access corridor.
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Results have been released for holes HWL-2026-001, HWL-2026-002 and HWL-2026-007, with visual observations provided for HWL-2026-016, all part of the 2026 drilling campaign at Howells Lake.
The company reported that hole seven of the 2026 drilling programme intersected 4.17m of 27.35% antimony, which included a section of 1.1m grading 70.3% antimony, positioned down dip of hole six.
In addition, holes one and two revealed near-surface antimony mineralisation, with hole two recording up to 3.1% antimony over 1.09m at a depth of 26m.
The zone occurs within an intrusive chlorite-feldspar porphyry connected to a regional north-east-trending structure.
Visual assessment of hole sixteen indicated the presence of massive stibnite over a 53.6m interval, which remains open to the north-east.
The geological context shows high-grade antimony passing through the porphyry and dipping at about 55 degrees, while a lower-grade zone is concentrated near contacts with graphitic tuff horizons.
The company stated that further drilling is planned to expand the identified mineralised zone and test the continuity of massive stibnite, with the potential for direct shipping ore supply for North American buyers.
Critical One founder, executive chairman and CEO Duane Parnham said: “Early drilling results have delivered confirmation of high-grade, continuous antimony mineralisation that extends significantly beyond the historical resource envelope.
“These intercepts demonstrate grade continuity and width, highlighting the substantial upside potential of the project.
“EFN’s collaboration will continue to assist Critical One as we mutually evaluate the grade, scale and strategic relevance of Howells Lake to meet the requirements of antimony supply chains for energy security and national defence in the West.”
