Doré Copper Mining Corp. announced positive results from two drill holes totaling 819 metres completed in late 2021 on the western part of the Gwillim property, which is under a 50/50 joint venture with Argonaut Gold Inc. (through its wholly owned subsidiary Prodigy Gold Inc.). Gwillim is located approximately 8 kilometers by road northwest of Chibougamau, Québec.

Gwillim Drilling Program: The company drilled two holes in September 2021 to test the KOD zone, located 300 meters south of the mined Gwillim Main zone. Hole KOD-21-02 intersected three mineralized zones, including a 13.3 meter zone grading 3.33 g/t starting at a vertical depth of approximately 25 meters and an intercept of 4.0 meters at 10.14 g/t Au, which is interpreted as the KOD zone. Hole KOD-21-03, drilled 100 meters north-northwest of KOD-21-02, intersected two mineralized zones and demonstrated the continuity of the KOD zone at depth (Figure 2).

The second mineralized zone, 6.0 meters at 4.64 g/t Au extended the KOD zone vertically by approximately 50 meters from prior historical intercepts (historical drill holes locations are approximate and will be georeferenced in the coming months) and is the deepest intersection to date at a vertical depth of 400 meters. Gwillim Property: The Gwillim property totals 486 ha. The western part of the property (385 ha) is under a 50/50 joint venture between Dore Copper and Argonaut Gold Inc. (through its wholly owned subsidiary Prodigy Gold Inc.) with Dore Copper being the operator.

The eastern part of the property (102 ha) is 100% owned by Dore Copper. Located on the joint venture land, the Gwillim mine operated between 1974 and 1976 and again from 1980 to 1984. In total 254,066 short tons were mined at a grade of 4.79 g/t Au1.

Most of the production came from the Main zone, which extended along strike for 122 meters with an average width of 2.6 meters and up to a depth of 114 metres. In 1987, two high-grade intercepts of 7.0 meters at 33 g/t Au and 7.9 meters at 17.9 g/t Au were drilled by Greenstone Resources Ltd. at moderate depths of 200 to 300 meters at the KOD zone (300 meters south of the mined Gwillim Main zone)2. A further 25 holes were drilled from the surface before a ramp was developed and the zone was further explored from underground in 1988 but not mined (some development through ore). In 1989, three more surface holes were drilled to depths of 400 meters with one hole confirming the extension of the high-grade mineralization beyond 300 meters vertical depth.

An internal report from 1989 outlined a small historical resource (not NI 43-101 compliant) for the KOD Zone. No other significant exploration activities are reported after this work. Gwillim is hosted within the Roy group in the Bruneau Formation, in pillowed basalts and gabbroic sill.

Mineralization is hosted predominantly within east-west, steeply dipping structures containing quartz-carbonate veins with limited amounts of massive sulphides. At KOD, there are two parallel east-west vein zones, approximately 50 meters apart, with the mineralization predominantly occurring in the northernmost vein. The thickness of the mineralization varies between 0.3 and 5.0 meters.

The KOD zone is open along strike and downdip to the east under the Gwillim lake. Drilling and Quality Control: The Company is using Miiken Drilling as the drilling contractor. Miiken is a joint venture between Chibougamau Diamond Drilling Ltd., the First Nations community of Ouje-Bougoumou and the First Nations community of Mistissini both located in the Eeyou Istchee territory.

Sample preparation was done at SGS Canada Inc. in Val-d'Or, Québec, fire assay and ICP analysis was done at SGS Canada Inc. in Burnaby, B.C. Samples were weighed, dried, crushed to 75% passing 2 mm, split to 250 g, and pulverized to 85% passing 75 microns. Samples were then fire assayed for Au (50 g) and sodium peroxide fusion ICP-MS finish for 34 elements. QA/QC is done in house by company's Geologists with oversight from the Exploration Manager.

The check samples (blanks and standards – 4% of total samples with another 2% of core duplicates) that were inserted into the sample batches are verified against their certified values and are deemed a pass if they are within 3 standard deviations of the certified value. The duplicates are evaluated against each other to determine mineralization distribution (nugget). If there are large discrepancies in the check samples, then the entire batch is requested to be re-assayed.