Gwillim - Doré Copper Mining Corp

Gwillim

Exploration Project

The Gwillim property totals 486 ha and is located 8 km by road northwest of Chibougamau. The western part of the property (385 ha) is under a 50/50 joint venture between Dore Copper and Argonaut Gold (through its wholly owned subsidiary Prodigy Gold) with Dore Copper being the operator. The eastern part of the property (102 ha) is 100% owned by Dore Copper. 

The Gwillim property totals 486 ha and is located 8 km by road northwest of Chibougamau. The western part of the property (385 ha) is under a 50/50 joint venture between Dore Copper and Argonaut Gold (through its wholly owned subsidiary Prodigy Gold) 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 245,245 short tons were mined at a grade of 0.142 oz/t Au (4.86 g/t Au). Most of the production came from the Main zone, which extended along strike for 122 m with an average width of 2.6 m and up to a depth of 114 m.

In 1987, two high-grade intercepts of 7 m at 33 g/t Au and 7.9 m at 17.9 g/t Au were drilled by Greenstone Resources at moderate depths of 200 to 300 m at the KOD zone (300 m south of the mined Gwillim Main zone). 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 m with one hole confirming the extension of the high-grade mineralization beyond 300 m vertical depth. In 2021, the JV drilled two holes with hole KOD-21-02 intercepting 13.3 m of 3.33 g/t Au and 4.0 m of 10.14 g/t Au and hole KOD 21-03 intercepting 4 m of 3.03 g/t and 6 m of 4.64 g/t Au including 2 m of 11.69 g/t Au (refer to news release dated April 21, 2022). 

Gwillim is hosted within 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 m apart, with the mineralization predominantly occurring in the northernmost vein. The thickness of the mineralization varies between 0.3 m and 5.0 m. The KOD zone is open along strike and downdip to the east under the lake.  

During the summer of 2022, Doré Copper compiled all geology, mineralization and assay results of 296 historical drill holes logs found in the archives of the Company. Following field work confirmed the location of several drill holes and trenches, and the positioning of the historic exploration grid. Doré Copper now has a solid database that will allow it to do 3D modeling of the various mineralized zones (e.g. preliminary modeling of B and C zones at the KOD zone. This work will allow to plan, in collaboration with Argonaut Gold, future exploration work on the property. 

MAPS AND SECTION

Plan view of Gwillim Property
Surface compilation map showing location of 2021 drill holes (KOD-21-02 & 03)
Cross-Section of the KOD Zone
Long Section of the KOD Zone B (Looking North)
Long Section of the KOD Zone C (Looking North)