Doré Copper Mining Corp. announced the final results from its 2022 drilling program on its Corner Bay property, located in the Chibougamau mining camp, approximately 40 kilometers by road from Chibougamau, Québec. In 2022, Doré Copper has completed 44 holes totaling 38,405 meters and is reporting the assay results from the last 12 holes.

This drilling program is part of the feasibility study work to upgrade the Inferred Mineral Resource to the Indicated category. Another infill drilling program of approximately 2,000 meters is planned at Devlin for the first quarter of 2023. Corner Bay Drilling Program: The drilling program which started in early 2022 is designed to infill the Corner Bay deposit at a 50 to 60 meter spacing from surface to a depth of 1,000 meters.

From today's results, 9 holes intersected the Main Vein above the dyke and the remaining 3 holes intersected the Main Vein below the dyke. The results are continuing to confirm the continuity of the copper mineralization for the Main Vein above and below the dyke. The results have defined the presence and continuity of a second vein located 50 meters east of the Main Vein above the dyke.

This second vein has been intersected by six drill holes to date (CB-21-53, 58, 60 and CB-22-96, 97 and 98) and remains open up-dip. Mineralization in this area appears to be parallel and controlled by mafic dykes, interpreted as originating from the Chibougamau Pluton. Hole CB-21-53 intersected 2.0 meters of 3.34% Cu, 0.56 g/t Au, and 15.6 g/t Ag, hole CB-21-58 intersected 0.6 meter of 0.9% Cu, and hole CB-21-60 intersected 1.6 meters of 1.27% Cu.

Following a review of the required drilling for the feasibility study, the Company has identified 9 holes from 2004 that were excluded from the current mineral resource estimate. All holes intersected copper mineralization at a shallow depth in the two subparallel veins (Main Veins) above the dyke. Significant high-grade intercepts included: CB-04-13: 7.07 meters of 10.09% Cu, 0.61 g/t Au; CB-04-15: 13.0 meters of 3.23% Cu, 0.38 g/t Au; CB-04-17: 13.25 meters of 8.52% Cu, 0.51 g/t Au.

Corner Bay Deposit: In the Preliminary Economic Assessment announced on May 10, 2022, the Mineral Resource estimate for Corner Bay contains an Indicated Resource of 2.68 Mt at 2.66% Cu and 0.26 g/t Au containing 157 million pounds of copper and 22,000 ounces of gold and an Inferred Resource of 5.86 Mt at 3.43% Cu and 0.27 g/t Au containing 443 million pounds of copper and 51,000 ounces of gold, based on a cut-off grade of 1.3% Cu and a copper price of USD 3.75 per pound. The Corner Bay deposit contains significant silver and molybdenum which have not been included in the prior MREs. The feasibility study will include the addition of silver and molybdenum as by-products.

The Corner Bay deposit is hosted by the intrusive Lac Doré Complex on the southern flank of the Chibougamau anticline. A regional north-northeastern diorite dyke also cuts the area. Several significant shear zones oriented north-south and northwest-southeast have been identified in the area.

The Corner Bay area is characterized by copper porphyry style mineralization and by copper mineralization in shear zones commonly associated with dykes related to the Chibougamau Pluton.