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Erdene Announces Year-End Results and Provides Bayan Khundii Project Update

Financials

TSX: ERD | MSE: ERDN

www.erdene.com 1 [email protected]

ERDENE ANNOUNCES YEAR-END RESULTS AND

PROVIDES BAYAN KHUNDII PROJECT UPDATE

Press Release

Halifax, Nova Scotia

2024.04.02

Erdene Resource Development Corp. (TSX:ERD; MSE:ERDN) ("Erdene" or the

"Company") is pleased to announce operating and financial results for the year ended

December 31, 2023, and to provide an update on progress at its Bayan Khundii Gold

Project (“BK” or “Project”). This release should be read in conjunction with the Company’s

2023 Financial Statements and MD&A, available on the Company’s website and SEDAR+.

Peter Akerley, Erdene’s President and CEO stated, “The past year was a transformative

period for Erdene with the striking of our Strategic Alliance with Mongolian Mining

Corporation (“MMC”), Mongolia’s leading publicly traded mining company , the

commencement of construction at the Bayan Khundii gold project and continued

exploration success across the Khundii Minerals District.”

He continued, “The Bayan Khundii gold mine is one of the highest grade, open pit gold

mines under development globally and will be Mongolia’s largest primary gold producer

when it reaches full production. With early works complete, project finance secured, long-

lead orders now arriving to site and the 2024 construction season underway, we are on

track to produce first gold at Bayan Khundii in Q2 2025.”

Mr. Akerley concluded, “Exploration during the 2023 field season further expanded

mineralization in our Khundii Minerals District, located in an under-explored, world-class

gold and copper belt. We have established a pipeline of high-quality projects, including

high-grade gold satellite deposits to Bayan Khundii, the large Altan Nar gold-polymetallic

deposit and the vast Zuun Mod molybdenum-copper porphyry resource. We plan to work

with our strategic partner MMC to build upon our exploration success to unlock new

opportunities for the Mongolian mining sector, increase the industry’s contribution to the

national economy and create long-term value for Erdene shareholders.”

2023 Highlights and Significant Subsequent Events:

TSX: ERD | MSE: ERDN

www.erdene.com 2 [email protected]

Image: Bayan Khundii Gold Project Construction Site

Bayan Khundii Gold Project

• Announced formal construction decision for Bayan Khundii on January 15, 2024

- Awarded the Project’s Engineering, Procurement and Construction (“EPC”)

services contract to MCS Property LLC (“MCSP”), a leading Mongolian

construction firm and affiliate of MMC

- Entered a power purchase agreement (“PPA”) with MCS International LLC

(“MCSI”), a long-standing energy services and power generation company and

affiliate of MMC

- Construction ramp-up starting in February 2024 with substantial completion

scheduled for end of 2024 – commissioning scheduled for Q1 2025 and first gold

planned in Q2 2025

• Completed early works, site establishment and major procurement for the Bayan

Khundii Gold Mine

- Early works and site establishment, including installation of temporary facilities and

process plant civils and footings complete – represents ~12% of total project

construction

- Approximately 330 employees and contractors on site during peak – no lost time

incidents

- Long lead and critical equipment orders on track with first deliveries received in

late Q4 2023

• Delivered Bayan Khundii NI 43-101 Feasibility Study Update (US$1,800/oz gold price,

unless noted)

TSX: ERD | MSE: ERDN

www.erdene.com 3 [email protected]

- Base Case after-tax NPV5% of US$170 million and Internal Rate of Return (“IRR”)

of 35% increasing to US$223 million and 42%, respectively, at gold price of

US$2,000/oz

- Life of Mine Earnings Before Interest, Taxes and Depreciation of US$451 million,

increasing to US$540 million at a US$2,000/oz gold price

- Total recovered gold of 476,000 ounces, a 25% increase compared to the 2020

FS with an average gold recovery rate of 93%

- All-in sustaining cost (“AISC”) of US$869 per ounce and upfront capital costs of

US$88 million, plus a 12% contingency, and pre-production costs of US$2 million

- Measured and Indicated Resources of 674,700 ounces gold at an average grade

of 2.6 g/t gold, and 319,000 ounces silver at an average grade of 1.38 g/t silver

- Proven and Probable Reserves of 513,700 ounces gold at an average grade 4.0

g/t gold, and 220,500 ounces silver at an average grade of 1.7 g/t silver

- Average annual gold production of 86,900 ounces during years 2 through 5 – Life

of Mine annual average production of 74,200 ounces gold

- Adjacent high-grade resources and recent discoveries provide high probability

growth options

• Delivered on increased community and stakeholder commitments

- Conducted equipment operator training for 80 residents of Bayankhongor

province, the majority of who entered full-time operator employment at MMC to

gain further experience before deploying to Bayan Khundii for the start of

operations planned in 2025

- Completed community support projects, including the installation of a municipal

potable water treatment facility, public education sanitation facilities and herder

livelihoods support initiatives

- Remitted 2023 annual planned donations to local government development

programs, in accordance with the statutory Local Cooperation Agreement

Khundii Minerals District Exploration

• Conducted 2023 gold exploration program at the Greater Dark Horse prospect

- Drilled 1,040 metres intersecting anomalous gold and/or indicator elements in 16

of 18 holes

- Executed IP survey over 9 km2 area identifying several targets for follow-up

- Completed ~500 metre trenching program testing near surface supergene oxide

targets similar to those intersected at Dark Horse Mane, returning anomalous

mineralization in several areas

• Completed 4,100 metre drill program at Zuun Mod Moly-Copper deposit

- Expanded mineralization on periphery of current NI 43-101 mineral resource

- Intersected high-grade mineralization in a step-out hole, located 1.7km north of

the deposit, demonstrating the potential to expand resources

TSX: ERD | MSE: ERDN

www.erdene.com 4 [email protected]

Corporate

• Closed strategic alliance with MMC on January 23, 2024 to advance construction of

the BK Project

- MMC invested US$40 million for a 50% equity interest in EM, the company

holding the BK Project

- Erdene retains a 50% equity interest in EM as well as a 5% NSR royalty on

production from the Khundii District after the first 400,00 ounces of gold production

and a 100% interest in Zuun Mod

• Secured BK Finance from strategic partner MMC

- Up to US$80 million shareholder loan to EM

- Five-year bullet maturity, bearing interest at 13.8%, payable in arrears

• Recorded a net income of $522,043 for the year ended December 31, 2023, compared

to a net loss of $5,986,237 for the year ended December 31, 2022

- Exploration and evaluation expenses totaled $847,010 for the year ended

December 31, 2023, compared to $3,798,676, with the year -on-year change

primarily due to the reporting of EM’s activity as an Investment in Associate in the

current year due to the loss of the control of the subsidiary following the Strategic

Alliance with MMC, partially offset by regional exploration work incurred by Erdene

- Exploration and evaluation expenditures, including capitalized expenditures,

totaled $7,266,375 for the year ended December 31, 2023, compared to

$11,770,631 for the prior year primarily due lower drilling activity during the current

year as well as reduced spending on engineering and design work for the Bayan

Khundii Gold Project following the commencement of early construction works

- Corporate and administrative expenses totaled $3,137,736 for the year ended

December 31, 2023, compared to $2,218,984 for the year ended December 31,

2022, with the year-on-year change primarily due to an increase in the allocation

of management effort to corporate activities following the strategic alliance with

MMC, inflationary salary adjustments, and increased marketing, professional fees,

non-cash share-based compensation and travel costs

- Non-cash gain on loss of control of subsidiary of $6,544,863 and loss from

investment in associate of $2,278,370 due to the change in the basis of accounting

for Erdene’s investment in EM to equity accounting following the signing of the

Strategic Alliance and Investment Agreements with MMC in January 2023

Qualified Person

Peter Dalton, P.Geo. (Nova Scotia), Senior Geologist for Erdene, is the Qualified Person

as that term is defined in National Instrument 43-101 and has reviewed and approved the

technical information contained in this news release.

TSX: ERD | MSE: ERDN

www.erdene.com 5 [email protected]

About Erdene

Erdene Resource Development Corp. is a Canada-based resource company focused on

the acquisition, exploration, and development of precious and base metals in

underexplored and highly prospective Mongolia. The Company has interests in three

mining licenses and an exploration license in Southwest Mongolia, where exploration

success has led to the discovery and definition of the Khundii Gold District. Erdene

Resource Development Corp. is listed on the Toronto and the Mongolian stock exchanges.

Further information is available at www.erdene.com. Important information may be

disseminated exclusively via the website; investors should consult the site to access this

information.

Forward-Looking Statements

Certain information regarding Erdene contained herein may constitute forward-looking

statements within the meaning of applicable securities laws. Forward-looking statements

may include estimates, plans, expectations, opinions, forecasts, projections, guidance, or

other statements that are not statements of fact. Although Erdene believes that the

expectations reflected in such forward-looking statements are reasonable, it can give no

assurance that such expectations will prove to have been correct. Erdene cautions that

actual performance will be affected by a number of factors, most of which are beyond its

control, and that future events and results may vary substantially from what Erdene

currently foresees. Factors that could cause actual results to differ materially from those

in forward-looking statements include the ability to obtain required third party approvals,

market prices, exploitation, and exploration results, continued availability of capital and

financing and general economic, market or business conditions. The forward-looking

statements are expressly qualified in their entirety by this cautionary statement. The

information contained herein is stated as of the current date and is subject to change after

that date. The Company does not assume the o bligation to revise or update these

forward-looking statements, except as may be required under applicable securities laws.

NO REGULATORY AUTHORITY HAS APPROVED OR DISAPPROVED THE

CONTENTS OF THIS RELEASE

Erdene Contact Information

Peter C. Akerley, President and CEO, or

Robert Jenkins, CFO

Phone: (902) 423-6419

Email: [email protected]

Twitter: https://twitter.com/ErdeneRes

Facebook: https://www.facebook.com/ErdeneResource

LinkedIn: https://www.linkedin.com/company/erdene-resource-development-corp-/