Doré Copper Mining Corp. announced additional high-grade copper results from the remaining holes of its 2021 drilling campaign at its Corner Bay property, located in the Chibougamau mining camp, approximately 40 kilometers by road from Chibougamau, Québec. The 2021 drilling program totaled 41,063 meters in 43 holes (including wedge holes).

Doré Copper is reporting the results from five of the remaining six holes of the program, which are further confirming the expansion of the deposit. These latest results will be included into an updated Mineral Resource estimate for Corner Bay for the preliminary economic assessment anticipated at the end of the first quarter of 2022. Corner Bay Drilling Program: In the Main Vein above the dyke, results and previously announced high-grade intercepts of 3.9 meters of 8.03% Cu, 0.86 g/t Au, 42.1 g/t Ag, and 1,109 ppm Mo (hole CB-21-55); 4.2 meters of 6.18% Cu, 0.12 g/t Au, and 26.6 g/t Ag (hole CB-21-57); 3.7 meters of 9.41% Cu, 2.84 g/t Au, 36.5 g/t Ag, and 890 ppm Mo (hole CB-21-52); and 2.0 meters of 3.34% Cu and 15.6 g/t Ag (hole CB-21-53) have defined a very high-grade copper zone of approximately 250 meters of strike length by 250 meters of vertical depth.

This high-grade zone overlaps with the upper part of the Main Vein below the dyke and is still open down plunge. Two holes (CB-21-59 and 61) were drilled approximately 500 to 600 meters west of the Corner Bay Main Vein and did not intersect any significant mineralization. Assays are pending for hole CB-21-48, which is the deepest hole that targeted the Main Vein below the dyke.

The hole intersected approximately 60% chalcopyrite over 1 meter. The 2021 drilling program has successfully continued to expand the copper-gold mineralization at Corner Bay in three areas of the deposit, bringing the total strike length to over 1,100 metres. Corner Bay Deposit: In the Mineral Resource estimate of October 6, 2021, the Corner Bay deposit contains an Indicated Resource of 2.66 Mt at 2.68% Cu and 0.26 g/t Au containing 157 million pounds of copper and 22,000 ounces of gold and an Inferred Resource of 4.54 Mt at 3.20% Cu and 0.27 g/t Au containing 320 million pounds of copper and 39,000 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 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.