Underground Sampling At The Tintic Project

MONTREAL – Osisko Development Corp. reported on the ongoing underground exploration program on the Tintic project and the Trixie Mine, as well as mineral claims covering more than 17,000 acres (including over 14,200 acres of which are patented) located in Central Utah’s historic Tintic Mining District.

Chris Lodder, President, said, “The Trixie underground sampling results from 2020 to present show exceptional continuity of high grades associated with the T2 structure. These 2022 samples along with the historic sampling by TCM, and in combination with the ongoing exploration developments within the present 720 ft strike by 175 ft vertical by 80 ft wide zone gives Osisko Development with a strong base for present mining activity and initial resources estimation. We will continue to use the present shaft / hoist at Trixie but we anticipate to increase access and mining capacity to the 625 ft and lower levels of Trixie through a new underground ramp initiated very recently and expected to reach the 625 ft level in Q1 2023.”

The T2 and T4 mineralized structures are associated with high-sulphidation epithermal mineralization, structurally controlled and hosted within the brittle Tintic Quartzite and capped by the impermeable shales of the Lower Ophir Formation. The T2 structure is 1 to 8 ft. wide (0.3 m to 2.4m) and mineralization consists of native Au, and rare Au-Ag – rich telluride minerals with quartz. The T4 is a mineralized stockwork zone ranging from to 10 to 80 ft. (3 m to 25 m) and located in the hanging wall of the T2 and is comprised of Au-Ag rich mineralization in host rock quartzite with quartz-barite-sulphosalt stockwork veining. Mineralization currently defined over 220 meters (720 feet) in strike and reports consistent multi-ounce gold grades along its entire strike length.

As most structures at Trixie are steeply dipping to the east or west, current sampling procedures are designed to sample the structure. Channel samples are collected and do not exceed 3 ft. (1.0 m) in length. The face is washed for safety, and for better identification of mineralization, alteration and structures. The hangingwall and footwall of the structures are marked up on the face and back, samples intervals are marked up and follow lithological contacts.