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Dore Copper Announces Exercise of Joe MANN Option FOR 100% Interest IN the Property

Mergers & Acquisitions Property Options & Staking

PRESS RELEASE

DORE COPPER ANNOUNCES EXERCISE OF JOE MANN OPTION FOR 100%

INTEREST IN THE PROPERTY

Toronto, Ontario – February 21, 2023 – Doré Copper Mining Corp. (the " Company" or "Doré Copper")

(TSXV: DCMC; OTCQ X: DRCMF; FRA: DCM) is pleased to announce that, further to its news releases

dated January 2, 2020 and November 18, 2022, it has exercised the option to acquire a 100% interest in

the Joe Mann Option Property (the "Option Property"), which covers the former Joe Mann mine, pursuant

to an earn-in option agreement (the "Option Agreement") dated January 2, 2020 , as amended October

28, 2022, between the Company and Ressources Jessie Inc. ("Ressources Jessie"). The Joe Mann mine,

located 60 kilometers south of Chibougamau, Quebec, produced 1.12 million ounces of gold at an average

grade of 8.26 g/t from the 1950s to 2007.1 The deposit has an inferred mineral resource of 680,000 tonnes

grading 6.78 g/t Au and 0.24% Cu , which was included in the Co mpany's Preliminary Economic

Assessment (PEA) of its hub-and-spoke operation announced on May 10, 2022.2

In accordance with the terms of the Option Agreement, Ressources Jessie has transferred the Option

Property (1,965 ha) to the Company and the Company has granted to Ressources Jessie a 2% net smelter

return ("NSR") royalty on the mine production from the Option Property. The Company will be entitled to

buy back 1% NSR in consideration for a payment to Ressources Jessie of $2,000,000 and to buy back an

additional 0.5% NSR in consideration for a payment to Ressources Jessie of $4,000,000.

Pursuant to the terms of the Option Agreement, upon the commencement of commercial production at the

Option Property, Doré Copper will make an additional $1,000,000 cash payment to Ressources Jessie and

issue $1,500,000 in common shares in the capital of the Company to Legault Metals Inc.

With the exercise of the Option Property, Doré Copper has a 100% interest in the Joe Mann Property which

totals 2,732 ha in four groups of non -contiguous mineral titles, including 74 claims and two mining

concessions (Figure 1).

Sylvain Lépine, M.Sc., P.Geo., Vice President Exploration of the Company and a "Qualified Person" within

the meaning of National Instrument 43 -101 – Standards of Disclosure for Mineral Projects , has reviewed

and approved the scientific and 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 mill .2 The Company has delivered its

PEA in May 2022 and is proceeding with a feasibility study.

The Company has consolidated a large land package in the prolific Lac Doré/Chibougamau and Joe Mann

mining camps that has historically produced 1.6 billion pounds of copper and 4.4 million ounces of gold .1

The land package includes 13 former producing mines, deposits and resource target areas within a 60 -

kilometre radius of the Company's Copper Rand Mill.

2

Figure 1. Joe Mann Property - Land Tenure Map

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. Sources for historic production figures: Economic Geology, v. 107, pp. 963 –989 - Structural and Stratigraphic Contr ols 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 d ated January 11, 2016 by Geologica Groupe -Conseil Inc. for Jessie Ressources Inc. (Joe Mann mine). Doré

Ramp November 1992 Summary, internal Westminer Report.

2. 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. The Technical

Report was prepared by BBA Inc. with several consulting firms contributing to sections o f the study, including SLR Consulting

(Canada) Ltd., SRK Consulting (Canada) Inc. and WSP Inc.

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",

3

"target", "schedule", "budget" and "intend" and statements that an event or result "may", "will", "should", "could" or

"might" occur or be achieved and oth er similar expressions and includes the negatives thereof. All statements other

than statements of historical fact included in this news release, including, without limitation, statements with respect to

the timing and ability of the Company to receive necessary regulatory approvals , the Company's ability to meet its

production target, the commencement, timing and completion of a feasibility study, and the plans, operations and

prospects of the Company 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 ma y 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 b e 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

and other exploration or other risks detailed herein and from time to time in the filings made by the Company with

securities regulators. Although the Company 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 Company

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.

Neither TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the

policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this

news release.