Osisko Development Announces Positive Bulk Tonnage Ore Sorting Results for the Cariboo Gold Project

Core Insights - Osisko Development Corp. announced positive results from an ore sorting testing program at its Cariboo Gold Project, confirming gold recoveries and upgrade ratios consistent with the 2025 feasibility study (FS) assumptions [2][5][12] Summary by Sections Ore Sorting Test Results - The ore sorting testwork demonstrated gold recoveries of 84-95% across various particle sizes, with a mass pull of 41-58% and upgrade ratios ranging from 1.96 to 2.23, aligning with the 2025 FS assumptions [2][5][6] - Notably, the previously untested 6-10 mm size fraction showed a 95% gold recovery with a 41% mass pull, indicating potential for future optimization [5][11] Methodology and Observations - The test utilized a production-scale TOMRA COM 1200 Tertiary XRT machine on a ~80 tonne sample, significantly larger than previous tests which totaled ~5 tonnes [2][5][11] - The testing process involved a cascade-style approach, adjusting sorter settings to optimize mass pull and recovery, leveraging recent advancements in AI technology [11][12] Project Overview - The Cariboo Gold Project is a permitted, 100%-owned feasibility-stage project located in central British Columbia, covering approximately 186,740 hectares with significant mineral reserves and resources [12][13] - The project hosts probable mineral reserves of 2.07 million ounces of gold and various measured, indicated, and inferred resources totaling over 10 million ounces [13] Next Steps and Opportunities - The company plans to conduct further flowsheet optimization and a variability study as part of detailed engineering to refine sorting assumptions across the deposit [5][11] - The positive results from the ore sorting tests may lead to enhanced overall recoveries and improved project economics [5][11]