Mr. Ernest Mast reports

DORÉ COPPER TO DRILL HIGH PRIORITY COPPER-GOLD TARGETS THIS SUMMER IN CHIBOUGAMAU, QUEBEC

Dore Copper Mining Corp. plans to drill several high-priority copper-gold targets in the central Chibougamau mining camp, located in proximity to its existing Copper Rand mill, near Chibougamau, Que. The drilling program is scheduled to start at the end of June.

High-priority drilling targets

Jaculet

The Jaculet mine, located 2.5 kilometres by road from the Copper Rand mill, was in operation from 1960 to 1971 and produced a total of 1,091,000 tonnes at 1.84 per cent Cu, 1.44 grams per tonne Au and 6.85 grams per tonne Ag (20,074 tonnes of Cu and 1.57 tonnes Au). Jaculet was mined to a depth of 366 metres (1,200 feet) and the shaft was deepened to 500 metres (1,650 feet) in 1972. The Jaculet mineralized system consists of two distinct shear zones, known as Zone 1 and Zone 2, which both remain open at depth with very little development below 366 metres.

Two surface holes completed in 1956 by Chibougamau Jaculet Mines Ltd. intersected Zone 1 at a vertical depth of approximately 400 metres. Hole V17 and V17A (wedge from V17, located approximately 50 metres to the east) intersected 4.55 per cent Cu and 0.86 g/t Au over 6.7 metres and 4.25 per cent Cu and 0.59 g/t Au over 6.4 metres, respectively.

Dore Copper plans to drill two holes for a total of 1,300 metres. The first hole will test the potential down plunge extension of holes V17 and V17A in Zone 1. The second hole will test another potential ore shoot located approximately 400 meters to the west.

The Jaculet deposit is defined by two distinct subparallel shear zones, known as Zone 1 and Zone 2, separated by approximately 200 metres, where the veins within both zones typically range from 91 to 137 metres in strike length. Zone 1 extends for approximately 500 metres and has an average strike of 290 degrees with a northerly dip ranging from 55 degrees to near vertical. Mineralization in Zone 1 consists of chalcopyrite and minor pyrite within the sheared and altered gabbroic anorthosite. Zone 2 extends for approximately 670 metres in length and is oriented at 80 degrees north dipping 80 to 85 degrees to the south. Mineralization consists of stringers of pyrite with erratic lenses of chalcopyrite associated with siderite, sericite and chloritoid.

Cedar Bay southwest zone extension

The southwest zone, located 300 metres southwest of the Cedar Bay Main zone, was partially developed by Campbell Chibougamau Mines Ltd. up to the 200-metre (650-feet) level, right at the property limit with Patino Mining. The potential extension of the Cedar Bay southwest zone along strike to the southeast was never tested by Patino Mining and subsequent companies that controlled that ground. In total, approximately 800 metres of strike length have not been tested up to the Lac Dore fault.

Dore Copper plans to drill two holes from the same pad for a total of 1,500 metres to test the potential southeast extension of the Cedar Bay southwest zone.

The Cedar Bay mine operated from 1958 to 1990 and produced 3.9 million tonnes grading 1.56 per cent Cu and 3.22 g/t Au. The ore from the mine was processed at the Copper Rand mill located five kilometres by road. The deposit was mined to a depth of 670.5 metres and the existing shaft extends to a depth of 1,036 metres. Dore Copper, while private, completed four holes (including wedges) totalling 4,842 metres in 2018 and reported an indicated resource of 130,000 tonnes at 9.44 g/t Au and 1.55 per cent Cu, and an inferred resource of 230,000 tonnes at 8.32 g/t Au and 2.13 per cent Cu (effective date of Dec. 31, 2018). During 2020, the corporation completed 9,025 metres of drilling and successfully extended a number of mineralized lenses (the 10-20A and 10-20B).

Qualified person

Sylvain Lepine, MSc, PGeo, MBA, vice-president of exploration of the corporation and a qualified person within the meaning of National Instrument 43-101, has reviewed and approved the technical information contained in this news release.

About Dore Copper Mining Corp.

Dore Copper Mining aims to be the next copper producer in Quebec with an initial production target of more than 50 million pounds of copper equivalent annually by implementing a hub-and-spoke operation model with multiple high-grade copper-gold assets feeding its centralized Copper Rand mill. The corporation delivered its preliminary economic assessment in May, 2022, and is proceeding with a feasibility study.

The corporation has consolidated a large land package in the prolific Lac Dore/Chibougamau and Joe Mann mining camps that have historically produced 1.6 billion pounds of copper and 4.4 million ounces of gold. The land package includes 13 former-producing mines, deposits and resource target areas within a 60-kilometre radius of the corporation's Copper Rand mill.

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