Doré Copper Mining Corp. announced the discovery of a new copper-gold mineralized zone at the Doré Ramp copper-gold deposit located 2.5 kilometers from the existing Copper Rand mill, near Chibougamau, Québec. To date, the Company has completed six holes, including two wedge cuts, for a total of 7,020 meters.

Assays have been received for the first three holes. This new copper-gold mineralized zone was intersected in all six holes over a strike length of approximately 360 meters. It is located approximately 300 meters to the south of the Doré Ramp zone with parallel strike and dipping approximately 55° to the southwest as per current interpretation.

The new zone is characterized by a 2 to 8 meter zone of quartz veining containing localized disseminated and/or massive chalcopyrite and pyrite within a large ductile fault zone that is strongly sericitized and chloritized. The first three holes drilling intersections include: LDR-22-01W2: 3.98% Cu and 0.36 g/t Au over 2.35 meters, including 16.45% Cu and 0.7 g/t Au over 0.35 meter; LDR-22-01W1: 2.34% Cu and 0.97 g/t Au over 1.8 meters, including 3.01% Cu and 1.24 g/t Au over 1.4 meters; LDR-22-01: 0.58% Cu and 0.65 g/t Au over 0.4 meter. Holes LDR-22-03 and 04 (assays pending) intersected chalcopyrite and pyrite mineralization in the new zone.

This drilling program was initially designed to test the continuity of the Doré Ramp copper-gold mineralized zone at depth. Hole LDR-22-01, at a vertical depth of approximately 900 meters, returned 4.37% Cu, 0.87 g/t Au and 13.0 g/t Ag over 2.4 meters, including 17.6% Cu, 1.76 g/t Au and 43.9 g/t Ag over 0.5 meters. Hole LDR-22-01W1 intersected the Doré Ramp zone approximately 50 meters west and below the above-mentioned intercept with 0.60% Cu and 2.85 g/t Au over 1.6 meters, including 1.61% Cu and 7.57 g/t Au over 0.6 meter.

Hole LDR-22-01W2, located 40 meters west and above intercept in LDR-22-01, did not intersect any signification mineralization on the Doré Ramp zone. The latest hole completed LDR-23-04 (assay pending) is the first hole to intersect the Doré Ramp zone in multiple parallel mineralized zones containing chalcopyrite and pyrite starting at a vertical depth of 800 metres. The Company plans to continue its exploration drilling program at Doré Ramp and other targets on the property.

Doré Ramp Deposit: The Doré Ramp deposit is within the Chibougamau Central mining camp and as many other deposits and mineral occurrences it is within a wide shear zone of 100 to 400 meters perpendicular to the Lac Doré fault. In the Chibougamau Central camp, the copper and gold-rich mineralized zones are in contact with acidic to intermediate dykes interpreted as originating from the Chibougamau Pluton. The Doré Ramp deposit starts at 80 meters below surface and has been tested over a strike length of approximately 500 metres.

It consists of a series of subparallel pinch and swell veins, varying in thickness from 0.3 to 7.7 meters, over a strike length of up to 300 meters. A number of mineralized lenses are displaced by northeast faults at 15 to 30 metres intervals. The Doré Ramp deposit was drilled in a few different phases from 1984 to 1992.

A total of 47 drill holes from surface are reported during that period. A double ramp approximately 1 kilometer long was excavated in 1991-92 to a vertical depth of 160 metres, followed by an underground drilling campaign of 46 holes totaling 10,200 metres testing the deposit to a depth of 240 meters. Only five holes tested the deposit between 300 and 600 meters.

At the end of 1992, Westminer Canada reported a historical estimate of 209,120 tonnes at 1.23% Cu and 5.4 g/t Au, from a depth of the surface pillar of 115 meters to 350 meters (Source: Westminer Canada Limitée, Project Lac Dore, November 1992). This estimate is considered to be historical in nature and should not be relied upon. A Qualified Person has not completed sufficient work to classify the historical estimate as a current mineral resource or mineral reserve.

The Company is not treating the historical estimate as current mineral resources or mineral reserves). No subsequent exploration programs were carried out on the Doré Ramp deposit. Other Exploration Targets in Central Chibougamau Camp: Doré Copper continues its compilation work on the area around the large Copper Rand property in the Central Chibougamau Camp and intends to follow up on a number of exploration targets in 2023.

The Doré Ramp North Zone and Copper Rand South targets have not been tested below depths of 500 meters. Doré Ramp North Zone: The Doré Ramp North Zone is located 450 meters northeast of the Doré Ramp deposit (and approximately 2 kilometers southwest from Copper Rand mine and mill) and is defined by a shear corridor parallel to the Doré Ramp shear. Information collected from 11 historical drill holes targeting the Doré Ramp North show similar mineralization to the Doré Ramp.

The best intersections reported were 2.13% Cu and 1.25 g/t Au over 2.3 metres (hole S4-91-6) and 1.43% Cu and 1.68 g/t Au over 2.75 metres (hole S4-91-9). Copper Rand South: Copper Rand South (also known as Kerr Addison) is another shear corridor parallel to the Copper Rand shear located 490 meters to the southwest. The shear is approximately 60 meters wide and hosts a number of mineralized veins with chalcopyrite, pyrrhotite, sphalerite, and pyrite.

A portion of the deposit was mined as part of the Copper Rand mine between the 230 and 400 meter levels (e.g., veins 60-1, 57-3 and 65-5). Reported mined grades range from 1.20% Cu and 3.6 g/t Au from 230 to 300 meters, and 1.76% Cu and 0.93 g/t Au from 300 to 400 meters. There is an area of approximately 450 meters in strike length that has not been explored towards the Lac Doré Fault.

Geophysical surveys from 1991 indicate a conductive zone of approximately 100 square meters in that area. Copper Rand South remains open below 400 meters.