Critical One confirms Howells Lake antimony-gold project details

During the site visit, historic trenches were relocated, and surface antimony (stibnite) mineralisation at the trenches was sampled and immediately submitted for analysis. The team also determined the locations of some of the historic drill hole collars in advance of the Company commencing more extensive fieldwork, which will include a detailed, property-wide, state-of-the-art airborne magnetic and electromagnetic geophysical survey. These investigations are part of a comprehensive initiative designed to evaluate the size and grade of the historic antimony-gold mineralised zones already identified from the original discovery work in 1979, as well as to identify new, high-priority antimony and gold exploration targets across the 26-km-long property, which will continue to reinforce Critical One’s position as the operator of Canada’s largest undeveloped antimony deposit.

Summary Highlights from CEO-led field investigation:

• Antimony mineralisation was located and sampled for immediate analysis.
• Historic drill core hole collars and surface trenches were identified and geolocated.
• 1984 drill core was located and initial evaluation completed (antimony reported in some drill logs – no assays available).
• Some or all of the 1986 drill core from holes completed 15 km to the northeast of the Howells Lake antimony-gold deposit area was located and determined usable for follow-up evaluation (gold mineralisation reported).
• Logistics evaluated and organized for future exploration programmes.
• Broad zones of strong carbonate and sericite alteration up to 100 m wide were confirmed to cover and flank the locations of the known antimony-gold mineralisation. More details on structure, alteration and gold mineralisation were documented.

“With this new information in hand, Critical One can continue to develop plans for a significant field exploration program designed to evaluate targets developed from this new information and from new airborne geophysical data that will soon be arriving daily from the field,” said Duane Parnham, Executive Chairman and CEO of Critical One.

The new information gathered while on site allowed Critical One to confirm the ground location of the known antimony-gold mineralisation and the locations of enough of the historic work that the Company is now confident the antimony-gold mineralisation is related to strong carbonate sericite alteration (including green mica) with accessory quartz carbonate veining and sulfides that include stibnite (antimony sulfide), pyrite, pyrrhotite, chalcopyrite, and sphalerite. Some of the sulfide concentrations, including the stibnite mineralisation, are broadly associated with the lower contact of a quartz feldspar porphyritic intrusive at the East Zone. Low gold values are located proximally and in places coincident with the antimony mineralisation. The zone of strong alteration and antimony mineralisation remains completely open to further significant expansion to depth and remains open along strike.

Antimony, a critical mineral essential for military defence, battery technologies, and flame retardants, is in high demand in North America and Western countries due to global supply constraints, with over 80% of the world’s supply controlled by China and Russia. The Howells Lake project, strategically located near Ontario’s Ring of Fire corridor, positions Critical One to address current supply chain challenges while advancing gold exploration in a tier-1 mining jurisdiction.

Read the article online at: https://www.globalminingreview.com/exploration-development/28072025/critical-one-confirms-howells-lake-antimony-gold-project-details/