Doré Copper Continues to Intersect High-Grade Copper Mineralization from 2022 Infill Drilling Program at Flagship Corner BAY Project
PRESS RELEASE
DORÉ COPPER CONTINUES TO INTERSECT HIGH-GRADE COPPER
MINERALIZATION FROM 2022 INFILL DRILLING PROGRAM AT FLAGSHIP
CORNER BAY PROJECT
Toronto, Ontario – August 11, 2022 – Doré Copper Mining Corp. (the "Corporation" or "Doré Copper")
(TSXV: DCMC; OTCQ X: DRCMF; FRA: DCM) is pleased to announce the second set of results from its
2022 drilling program of 45,000 meters at its flagship Corner Bay property, located in the Chibougamau
mining camp, approximately 40 kilometers by road from Chibougamau, Québec . As of August 10, 2022,
Doré Copper has completed 37 holes totaling 36,135 meters and is reporting today the assay results from
14 holes.
This drilling program is part of the feasibility study work to upgrade the Inferred Mineral Resource to the
Indicated category. Another infill drilling program of approximately 2,000 meters is planned at Devlin.
Drilling Highlights
Main Vein below dyke
• CB-22-71: 6.7 meters of 5.41% Cu, 0.45 g/t Au, and 29.7 g/t Ag, including 1.6 meters of 12.14%
Cu, 0.10 g/t Au, and 67.6 g/t Ag
• CB-22-90: 6.2 meters of 3.10% Cu and 10.2 g/t Ag, including 2.8 meters of 6.14% Cu, 0.19 g/t Au,
and 20.2 g/t Ag
• CB-22-69: 3.4 meters of 2.54% Cu, 0.24 g/t Au, 8.6 g/t Ag, and 1,038 ppm Mo
Main Vein above dyke
• CB-22-84: 3.0 meters of 3.39% Cu, 25.2 g/t Ag, and 419 ppm Mo
• CB-22-89: 4.6 meters of 2.54% Cu, 20.3 g/t Ag, and 346 ppm Mo
Ernest Mast, President and CEO of Doré Copper , commented, “The second set of assay results from the
infill drilling program at Corner Bay continue to confirm the continuity of the copper mineralization. In
addition, a representative bulk sample of ¼ core is being shipped to a supplier’s facility in the United States
for additional ore sorting tests. This is to confirm the sorter performance that was reported in the PEA and
to produce material for additional communition, flotation and geochemical testwork. ”
Corner Bay Drilling Program
The 2022 drilling program is designed to infill the Corner Bay deposit at a 50 to 60 meter spacing from
surface to a depth of 1,000 meters . From today’s results, six holes intersected the Main Vein above the
dyke and the remaining eight holes intersected the Main Vein below the dyke, with three holes intersecting
the East Vein with lower grade copper mineralization . The results are continuing to confirm the continuity
of the copper mineralization for the Main Vein above and below the dyke (Figure 1 and Table 1).
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Corner Bay Deposit
In the Preliminary Economic Assessment announced on May 10, 2022, the Mineral Resource estimate
(“MRE”) for Corner Bay contains an Indicated Resource of 2.68 Mt at 2.66% Cu and 0.26 g/t Au containing
157 million pounds of copper and 22,000 ounces of gold and an Inferred Resource of 5.86 Mt at 3.43% Cu
and 0.27 g/t Au containing 443 million pounds of copper and 51,000 ounces of gold, based on a cut-off
grade of 1. 3% Cu and a copper price of US$3. 75 per pound (refer to Technical Report dated June 15,
2022)1. The Corner Bay deposit contains significant silver and molybdenum which have not been included
in the prior MREs. The feasibility study will include the addition of silver and molybdenum as by-products.
The Corner Bay deposit is hosted by the intrusive Lac Doré Complex on the southern flank of the
Chibougamau anticline. A regional north -northeastern diorite dyke also c uts the area. Several significant
shear zones oriented north -south and northwest -southeast have been identified in the area. The Corner
Bay area is characterized by copper porphyry style mineralization and by copper mineralization in shear
zones commonly associated with dykes related to the Chibougamau Pluton.
Figure 1. Long Section of the Corner Bay Deposit Showing the 2022 Drill Results
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Table 1. Corner Bay Recent Drill Assays Highlights from the 2022 Drill Program
Hole From
(m)
To
(m) Width1 (m) Cu (%) Au
(g/t) Ag (g/t) Mo (ppm) Zone
CB-22-65 991.8 993.5 1.7 3.63 0.37 15.3 1,060 MV below dyke
1,007.6 1,010.4 2.8 1.42 0.38 6.5 452 MV below dyke
CB-22-69 1,027.4 1,030.8 3.4 2.54 0.24 8.6 1,038 MV below dyke
CB-22-71 924.0 930.7 6.7 5.41 0.45 29.7 209 MV below dyke
Including 929.1 930.7 1.6 12.14 0.10 67.6 86 “
CB-22-72 1,070.6 1,073.0 2.4 1.29 0.15 4.5 218 MV below dyke
CB-22-73 684.4 685.6 1.2 1.15 0.09 - - MV above dyke
CB-22-80 987.5 989.4 1.9 1.93 0.22 6.9 403 MV below dyke
CB-22-81 593.3 595.1 1.8 0.54 0.14 6.0 111 MV above dyke
CB-22-84 658.1 661.1 3.0 3.39 0.22 25.2 419 MV above dyke
Including 658.8 660.2 1.4 7.17 0.46 52.9 888 “
868.4 869.5 1.1 2.03 0.09 6.4 384 East Vein
CB-22-85 981.4 984.5 3.1 1.56 0.20 5.1 549 MV below dyke
CB-22-87 554.0 555.5 1.5 1.18 0.2 15.9 887 MV above dyke
565.8 568.0 2.2 1.21 0.19 12.0 75 MV above dyke
CB-22-88 1,128.0 1,129.6 1.6 1.48 0.09 5.6 359 MV below dyke
CB-22-89 704.5 709.1 4.6 2.54 0.12 20.3 346 MV above dyke
CB-22-90 1,006.3 1,012.5 6.2 3.10 0.10 10.2 161 MV below dyke
Including 1,008.7 1,011.5 2.8 6.14 0.19 20.2 283 “
CB-22-91 620.9 623.5 2.6 2.35 0.05 15.1 100 MV above dyke
1. The true width of the structures intersected is estimated at approximately 60-75% of the downhole width. Main Vein = MV.
Drilling and Quality Control
The Company is using Miikan Drilling as the drilling contractor. Miikan 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 and analysis within the mineralized zones are completed at AGAT Laboratories in
Mississauga, Ontario. For AGAT, samples are weighed, dried, crushed to 75% passing 2 mm, split to 250 g,
and pulverized to 85% passing 75 microns. Samples are then fire assayed for Au (50 g) and 4 acid digest
ICP-OES finish for 43 elements. Outside the mineralized zones, s ample preparation is completed at SGS
Canada Inc. in Val-d’Or, Québec and analysis (fire assay and ICP analysis) is completed at SGS Canada
Inc. in Burnaby, B.C. Samples are weighed, dried, crushed to 75% passing 2 mm, split to 250 g, and
pulverized to 85% passing 75 microns. Samples are 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 Vice President Exploration.
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 agai nst 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.
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Sylvain Lépine, M.Sc, P.Geo., Vice President 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 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 Copper Rand mill1. The Corporation has delivered its
PEA in May 2022 and plans to commence a feasibility stud y and submit the Preliminary Information
Statement of the Environmental and Social Impact Assessment (ESIA) in Q3 2022.
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 2. 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: [email protected] Email: [email protected]
Visit: www.dorecopper.com
Facebook: Doré Copper Mining
LinkedIn: Doré Copper Mining Corp.
Twitter: @DoreCopper
Instagram: @DoreCopperMining
1. Technical report titled "Preliminary Economic Assessment for the Chibougamau Hub -and-Spoke Complex, Québec, Canada"
dated June 15, 2022, in accordance with National Instrument 43-101 Standards of Disclosure for Mineral Projects (“NI 43-101”).
The Technical Report was prepared by BBA Inc. with several consulting firms contributing to sections of the study, including SLR
Consulting (Canada) Ltd., SRK Consulting (Canada) Inc. and WSP Inc.
2. 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 aiming to be the next copper producer in Québec with
an initial production target of +50 Mlbs of copper equivalent annually; implementing a hub-and spoke operation model;
plans to commence a feasibility study and submit the Preliminary Information Statement of the Environmental and
Social Impact Assessment (ESIA) in Q3 2022.
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 estimates 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 business conditions, uninsured
risks, regulatory changes, delays or inability to receive required regulatory approvals, health emergencies, pandemics
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and other exploration or other risks detailed herein and from time to time in the filings made by the Corporation 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. Accordingly, readers should not place undue reliance on forward -looking statements. The
Corporation disclaims any intention or obligation to update or revise any forward -looking statements, whether as a
result of new information, future events or otherwise, except as required by law.
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policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this
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