02:39 PM EDT, 07/07/2025 (MT Newswires) -- Osisko Development ( ODV ) on Monday announced "positive results" from an ore sorting testing program conducted on a bulk tonnage sample of mineralized material extracted from its Cariboo Gold Project in central British Columbia.

A company statement noted that the testwork results demonstrate gold recoveries, mass pull, and upgrade ratios consistent with the assumptions outlined in the 2025 feasibility study, and were conducted on a significantly larger scale than previous programs.

Among the highlights, the company said that the X-ray transmission (XRT) ore sorter testwork of an approximately 80 tonne sample taken from the Cariboo underground achieved "positive results" consistent with 2025 feasibility study parameters. It further noted that 42-55% waste rejection with 84-89% gold recovery was achieved by sorting mid-size and oversize sample material including 10-30 mm and 30-70 mm size fractions, respectively.

"Encouraging results from testing the previously unassessed 6-10 mm size fraction, made possible by recent advancements in AI, demonstrated 59% waste rejection and 92% gold recovery, highlighting a potential opportunity for future optimization," noted the company.

The company further noted that the testwork results demonstrated an upgrade ratio of 2.0-2.1, consistent with 2025 feasibility study assumption of 1.95.

The company also said that the new testwork represents a significantly larger data set, with previous sorting totaling approximately 5 tonnes and completed largely on material sourced from drill core.

A statement noted that flowsheet optimization work, including a variability study to refine assumptions across the deposit, is contemplated to be completed as part of detailed engineering.

The company further stated that an estimated 76% of the gold reported to the fines size fraction in the ore sorter testwork sample, which is elevated relative to the 2025 feasibility study assumption of 45%, would contribute to higher overall recoveries.

The company's shares were last seen up $0.03 to $3.12 on the TSX Venture Exchange.

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