Dore Copper Mining Corp. provided an update on its project activities located near Chibougamau, Quebec. Exploration Activities: During Second Quarter 2023, the Dore Copper geology team focused on data compilation and interpretation for the Gwillim and Jaculet projects.

A drilling program of 1,557 meters was completed in July 2023. Gwillim: During Fourth Quarter 2022, Dore Copper completed two drill holes (KOD-22-04 and 05) totaling 1,342 meters at the KOD Zone in the western part of the Gwillim property, which is under a 50/50 joint venture with Argonaut Gold through its wholly owned subsidiary Prodigy Gold with Dore being the operator. Doré Copper reported the results from the first hole on May 29, 2023.

KOD-22-04 intersected 9.67 g/t Au over 5.3 meters, including 19.46 g/t Au over 2.1 meters, starting at a vertical depth of approximately 580 meters and 11.10 g/t Au over 3.0 meters, which after a new revised interpretation are interpreted as Zone C of the KOD mineralized structure. Hole KOD-22-05, drilled on the same pad as KOD-22-04 and approximately 60 meters west-southwest of Zone C intersected in KOD-22-04 was determined to have been stopped short of Zone C by approximately 50 meters and was therefore extended in the July drilling program. In July 2023, Doré Copper completed three holes totaling 957 meters at Gwillim.

Hole KOD-22-05 was extended by 90 meters to test Zone C and the other two holes (KOD-23-06 and 07) tested a geophysical anomaly (airborne VTEM? survey conducted in January 2023), immediately west of the projected down plunge of the near-surface high-grade gold mineralization of Zone C. Hole KOD-22-05E intersected Zone C from 633 to 654 meters with several specks of gold observed at the beginning of Zone C and mineralization similar to KOD-22-04 Zone C. Hole KOD-23-06 intersected a 1.5 meter interval containing chalcopyrite and sphalerite in stringers. Hole KOD-23-07 intersected the Signal Zone (approximately 250 meters north of the KOD Zone C) characterized by several meters of massive pyrite, pyrrhotite and trace chalcopyrite and KOD Zones A, B and C. Assays for the three holes are expected in September.

The KOD mineralized system remains open along strike to the west and below 600 meters. Jaculet: Doré Copper completed one drill hole of 600 meters in July 2023 to test the potential down plunge extension of high-grade copper mineralization intersected in two surface historical holes from Chibougamau Jaculet Mines Ltd. in 1956. Historical holes V17 and V17A (wedge from V17 and located approximately 50 meters to the east) intersected Jaculet Zone 1 at a vertical depth of approximately 400 meters with 4.55% Cu and 0.86 g/t Au over 6.7 meters and 4.25% Cu and 0.59 g/t Au over 6.4 meters, respectively.

Hole JA-23-01 intersected 1.5 meters of mineralization, mainly chalcopyrite in centrimetric veins, at a downhole depth of 438 metres (Jaculet Zone 1), approximately 12 meters below the interpreted location of the historical intercepts in V17 and V17A. It is now believed that the location of the historical holes is perhaps inaccurate and more to the east, in the area of the underground workings, indicating that the mineralization hit in hole JA-23-01 is at the periphery of the main ore shoot. Assays are pending for hole JA-23-01.

Corner Bay Metallurgical Test Work: During fourth quarter 2022, a spatially diverse composite sample from the Corner Bay core was prepared for additional ore sorting tests at Steinert?s facility in Kentucky, United States, using a XRT sensor (X-ray transmission) and a laser sensor. The composite sample weighted 202 kg and graded 2.20% Cu, and included an 18% external mining dilution from the hanging wall and foot wall of the mineralized interval. The results, announced on April 18, 2023, showed a copper grade increase of 77% (from 2.20% to 3.93%) and copper recoveries in the order of 93.5% with the final reject portion representing 47.5% of the feed mass at a grade of 0.30% Cu.

Results were equally positive for gold, silver and molybdenum. Lastly, the arsenic grade of the two pre-concentrates was found to be 12 ppm which leads to a final concentrate with low arsenic levels. During second quarter 2023, a metallurgical test program was started at Base Metallurgical Laboratories in British Columbia.

A total of four spatially diverse composites were prepared, including the samples from the Steinert ore sorting tests. The metallurgical test work will include grind size optimization, reagent determination, and grade-recovery curves for copper. Recoveries for gold, silver and molybdenum will also be determined, as well as minor element concentrations in the copper concentrate.

The program will also include thickening and filtration testing. Preliminary results of the metallurgical test work indicate high rougher recoveries of +95% copper with little sensitivity to a grind size between 100 and 180 microns. Complete results are expected in third quarter 2023.