Category Conversion Drill Program At The San Antonio Project

MONTREAL – Sean Roosen, CEO of Osisko Development Corp. reported. “Initial results and geologic interpretation from Sapuchi, on the 2021 exploration and category conversion drill program campaign at its San Antonio Gold Project in Sonora State, Mexico, give us strong confidence in the potential to build the resources significantly within the property. With this confirmation and exploration drilling, we expect to have a resource estimation in the following months.”

The San Antonio Gold Project gold mineralization is characterized by hydrothermal breccia that forms an approximately 3,000 meters long east-northeast trending mineralization corridor with the Luz del Cobre copper deposit at the east. The gold mineralization is associated with intense sericite and chlorite alteration and is intrusion related with host sedimentary rocks. The breccia has been defined to a vertical depth of 500 meters and at an average depth of 250 meters. The upper 250 meters of the breccia is mostly altered and prospective. Drilling has occurred within the three major zones at Sapuchi, Golfo de Oro and California, over a combined strike length of 900 meters of the 3000-meter trend. True widths are estimated to be 80% to 100% of reported core length intervals. Intervals not recovered by drilling were assigned zero grade. Top cuts have not been applied to high grade assays.