Doré Copper Reports High-Grade GOLD Mineralization at Gwillim
PRESS RELEASE
DORÉ COPPER REPORTS HIGH-GRADE GOLD MINERALIZATION AT GWILLIM
Toronto, Ontario – April 21, 2022 – Doré Copper Mining Corp. (the " Corporation" or " Doré Copper")
(TSXV: DCMC; OTCQX: DRCMF; FRA: DCM) announces 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.
Drilling Highlights
KOD-21-02
• 3.33 g/t Au over 13.3 meters, including 26.8 g/t Au over 1.0 metre and 23.2 g/t Au over 0.5 meter
• 3.39 g/t Au over 3.0 meters
• 10.14 g/t Au over 4.0 meters
KOD-21-03
• 3.03 g/t Au over 4.0 meters
• 4.64 g/t Au over 6.0 meters, including 11.69 g/t Au over 2.0 meters
Ernest Mast, President and CEO of Doré Copper, commented, “Today’s results on the Gwillim’s KOD zone
demonstrate good continuity of the mineralization and have extended its depth to 400 meters vertical. We
are in the process of compiling and re-evaluating all the historical data for the Gwillim mine and the KOD
zone. Once completed, we and our JV partner Argonaut Gold Inc. will plan a drilling program to test the
strike and depth extension of both deposits. On our main deliverable for the year, we expect to have t he
results of the preliminary economic assessment (PEA) for our hub-and-spoke operation model by mid-Q2
2022.”
Gwillim Drilling Program
Doré Copper drilled two holes in September 2021 to test the KOD zone, located 300 meters south of the
mined Gwillim Main zone (Figure 1 and Table 1 ). 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 geore ferenced 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 m eters with an average width of 2.6 m eters and
up to a depth of 114 metres.
2
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 m eters 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 Formatio n, 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.
References:
1 Structural and Stratigraphic Control on Magmatic, Volcanogenic, and Shear Zone-Hosted Mineralization in the
Chapais-Chibougamau Mining Camp, Northeastern Abitibi, Canada – Leclerc et al., 1992 Society of economic geologist
inc. V 107, pp. 963-989.
2 Diamond Drilling Report on the Gwillim Lake KOD Zone, Greenstone Resources (internal report) – Robert McIntosh,
Project Geologist, Flanagan McAdam and Company, December 1989.
Table 1. Gwillim Assays Highlights from the 2021 Drill Program
Hole From
(m)
To
(m)
Width1
(m)
Au
(g/t) Zone
KOD-21-02 28.7 42.0 13.3 3.33 unnamed
including 28.7 29.2 0.5 23.2 unnamed
including 41.0 42.0 1.0 26.8 unnamed
138.5 141.5 3.0 3.39 unnamed
203.5 207.5 4.0 10.14 KOD
KOD-21-03 395.0 399.0 4.0 3.03 unnamed
448.5 454.5 6.0 4.64 KOD
Including 448.5 450.5 2.0 11.69 KOD
1. The true width of the structures intersected is estimated at approximately 55-60% of the downhole width.
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 Doré Copper 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 (nugge t). If there are large discrepancies in the check samples, then
the entire batch is requested to be re-assayed.
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Figure 1. Surface plan of a portion of the Gwillim Property showing the location of the 2021 drill holes.
Figure 2. Cross-section of the KOD zone showing holes KOD-21-02 and 03.
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Qualified Person
Andrey Rinta, P.Geo., the Exploration Manager 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 Doré Copper Mining Corp.
Doré Copper Mining Corp. aims to be the next copper producer in Québec with an initial production target
of +50 Mlbs of copper equivalent annually by implementing a hub-and spoke operation model with multiple
high-grade copper -gold assets feeding its centralized 2,700 tonnes per day mill. The Corporation is
expected to deliver a PEA by mid-Q2 2022 and then initiate a feasibility study and permit applications.
The Corporation has consolidated a large land package in the prolific Lac Doré/Chibougamau and Joe
Mann mining camps that has produced 1.6 billion pounds of copper and 4.4 million ounces of gold 3. 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.
For further information, please contact:
Ernest Mast Laurie Gaborit
President and Chief Executive Officer Vice President, Investor Relations
Phone: (416) 792-2229 Phone: (416) 219-2049
Email: emast@Dorécopper.com Email: lgaborit@Dorécopper.com
Visit: www.dorecopper.com
Facebook: Doré Copper Mining
LinkedIn: Doré Copper Mining Corp.
Twitter: @DoreCopper
Instagram: @DoreCopperMining
3. Sources for historic production figures : Economic Geology, v. 107, pp. 963 –989 - Structural and Stratigraphic Controls on
Magmatic, Volcanogenic, and Shear Zone -Hosted Mineralization in the Chapais -Chibougamau Mining Camp, Northeastern
Abitibi, Canada by François Leclerc et al. (Lac Dore/Chibougamau mining camp) and NI 43-101 Technical Report on the Joe
Mann Property dated January 11, 2016 by Geologica Groupe-Conseil Inc. for Jessie Ressources Inc. (Joe Mann mine).
Cautionary Note Regarding Forward-Looking Statements
This news release includes certain "forward -looking statements" under applicable Canadian securities legislation.
Forward-looking statements include predictions, projections and forecasts and are often, but not always, identified by
the use of words such a s "seek", "anticipate", "believe", "plan", "estimate", "forecast", "expect", "potential", "project",
"target", "schedule", "budget" and "intend" and statements that an event or result "may", "will", "should", "could" or
"might" occur or be achieved and other similar expressions and includes the negatives thereof. Specific forward-looking
statements in this press release include, but are not limited to the Corporation and its JV partner Argonaut Gold Inc.
planning a drilling program to test the strike and depth extension of both deposits; aiming to be the next copper producer
in Québec with an initial production target of +50 Mlbs of copper equivalent annually ; PEA by mid -Q2 2022 ;
implementing a hub-and spoke operation model; and initiating a feasibility study and permit applications after the PEA.
All statements other than statements of historical fact included in this release, including, without limitation, statements
regarding the timing and ability of the Corporation to receive necessary regulatory approvals, and the plans, operations
and prospects of the Corporation and its properties are forward -looking statements. Forward-looking statements are
necessarily based upon a number of estimate s and assumptions that, while considered reasonable, are subject to
known and unknown risks, uncertainties and other factors which may cause actual results and future events to differ
materially from those expressed or implied by such forward-looking statements. Such factors include, but are not limited
to, actual exploration results, changes in project parameters as plans continue to be refined, future metal prices,
availability of capital and financing on acceptable terms, general economic, market or busi ness conditions, uninsured
risks, regulatory changes, delays or inability to receive required regulatory approvals, health emergencies, pandemics
and other exploration or other risks detailed herein and from time to time in the filings made by the Corporat ion with
securities regulators. Although the Corporation has attempted to identify important factors that could cause actual
actions, events or results to differ from those described in forward-looking statements, there may be other factors that
cause such actions, events or results to differ materially from those anticipated. There can be no assurance that such
statements will prove to be accurate, as actual results and future events could differ materially from those anticipated
in such statements. Accord ingly, readers should not place undue reliance on forward -looking statements. The
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result of new information, future events or otherwise, except as required by law.
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