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Khundii Minerals District Exploration

• Conducted 15,000-metre Bayan Khundii ore-control drill program

  • Drilled 89 shallow diamond drill holes totaling 1,048 metres focused on near-surface high-grade, scheduled to be developed in the first 3-4 months of mining and a further 10 holes totaling 456 metres to assist with future mine planning

  • Second phase of the program, in Q4 2024, consisted of 106 diamond core holes totaling 1,168 metres and 812 reverse circulation holes for 12,273 metres for which results were received subsequent to year end with highlights included below

  • Results confirmed high-grade domains in the current block model and indicated areas of expansion with highlight intersections of 101.0 g/t gold over 4 metres, starting 7 metres downhole and 115.1 g/t gold over 4 metres from 11 metres (see table below for greater than 20 gram*metre intersections)

• Completed 950 metre Bayan Khundii expansion program on the periphery of the planned open pit

  • Drilling intersected gold mineralization in all holes, demonstrating the potential for resource growth and pit extension

  • Results included the highest-grade drilling results to date in Striker West, adjacent to the Bayan Khundii open-pit, including 7.3 g/t gold over 42 metres, with multiple high-grade metre intersections of 15 to 79 g/t gold (BKD-377)

• Conducted surface sampling program at the Greater Dark Horse area and at Zuun Mod

  • Multiple samples from Greater Dark Horse returned high grade gold (up to 37.7 g/t Au) and silver (over 100 g/t Ag), providing targets for follow-up drilling

  • Discovered new gold prospect 4.5 km west of the Zuun Mod molybdenum-copper deposit

• Added Kelly Cluer as Technical Advisor to assist exploration team

  • Brings more than 30 years’ experience including over a decade in Mongolia where he led the discovery and definition of two of the Country’s largest gold deposits

Corporate

• Closed strategic alliance with MMC on January 23, 2024

  • 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 after the first 400,000 ounces of gold production and a 100% interest in Zuun Mod

• Secured BK Project Finance from strategic partner MMC

  • Up to US$80 million shareholder loan to EM, the entity co-owned by Erdene and MMC

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

  • Secured by Erdene’s interests in EM and preferential rights over Erdene’s properties

• Obtained US$50 million facility for BK from Trade and Development Bank of Mongolia

  • 24-month term and repayable in equal monthly payments during the final six months of the loan

  • Facility bears interest at 13.3% per annum and is secured by BK’s process plant assets

• Recorded net loss of $8,245,886 for the year ended December 31, 2024, compared to net income of $522,043 for the year ended December 31, 2023

  • Exploration and evaluation expenses totaled $1,852,642 for the year ended December 31, 2024, compared to $847,010 in 2023, as certain salaries, consultant costs, and travel expenditures historically incurred by the associate EM were incurred directly following the close of the Strategic Alliance

  • Corporate and administrative expenses totaled $5,043,058 for the year ended December 31, 2024, compared to $3,137,735 for the year ended December 31, 2023, with the year-on-year change primarily due to the write-off of previously deferred project finance and other arrangement costs following termination of project finance diligence due to the Bayan Khundii shareholder loan with MMC, as well as the accrual of first gold bonuses for senior staff in the current year, and cost of living salary increases

  • Loss from investment in associate of $3,245,109 for the year ended December 31, 2024, compared to $2,278,370 in the prior year due to an increase in non-capitalized interest expenditures by EM following the February 2024 financing partially offset by Erdene’s change in ownership following the close of the Strategic Alliance in Q1 2024

  • Non-cash gain on dilution of $1,256,598 in the year ended December 31, 2024 due to the close of the Strategic Alliance with MMC, compared to a gain on loss of control of EM of $6,544,863 upon the signing of the Strategic Alliance with MMC in January 2023

Bayan Khundii Ore-Control Drilling

During Q4 2024, EM completed the second phase of the ore-control drill program, designed to test near-surface gold mineralized zones, scheduled to be developed in the first four months of mining, and generally within 15 metres of surface. The program consisted of 106 diamond core holes totaling 1,168 metres and 812 reverse circulation holes for 12,273 metres. Results confirmed consistency of mineralization in the previously defined blocks and drilling in 10 areas intersected mineralization that has the potential to extend ore blocks. A further 100+ holes are planned to verify these newly identified areas.

The attached map displays results from the ore-control drilling program and shows holes that intersected greater than 0.30 g/t gold (~75% of holes) over one metre (projected resource cut-off grade) within this shallow drilling program. Holes with significant high-grade intersections, defined as exceeding 20 gram-metres (~12% of holes), are highlighted in red. Details of the intersections are provided in the table below.

The output from the ore-control drilling will be incorporated into a Bayan Khundii mine plan update over the coming months. The updated plan will also consider the impact of higher gold prices as the current economic pit was defined using a US$1,850-ounce gold price and a US$2,000-ounce pit constraining factor. At current gold prices of approximately US$3,000 per ounce, additional near-pit resources are likely to be incorporated in the updated mine plan.

Ore-Control Drilling Highlights

Intervals exceeding 20 gram-metres (interval multiplied by average gold grade)

*Easting and Northing coordinates provided in this table represent drill collar locations using datum WGS 84 Zone 47N
** The majority of holes were drilled with a -60 dip and 030 azimuth. Due to geologic variability within the deposit all reported intervals are interpreted to be 80-100% true thickness

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. All samples have been assayed at SGS Laboratory in Ulaanbaatar, Mongolia. In addition to internal checks by SGS Laboratory, the Company incorporates a QA/QC sample protocol utilizing prepared standards and blanks. All samples undergo standard fire assay analysis for gold and 3-acid digest with AAS (Atomic Absorption Spectometry) analysis for silver.

Erdene’s drill core and RC (reverse circulation) sampling protocol consisted of collection of samples over 1 or 2 metre intervals (depending on the lithology and style of mineralization) over the entire length of the drill hole, excluding minor post-mineral lithologies and un-mineralized granitoids. Sample intervals were based on meterage, not geological controls, or mineralization. All drill core was cut in half with a diamond saw, with half of the core placed in sample bags and the remaining half securely retained in core boxes at Erdene’s Bayan Khundii exploration camp. All RC samples were split using a riffle splitter and half used for analysis and half securely stored at Erdene’s Bayan Khundii exploration camp. Core samples were organized into batches of 30 and RC samples were organized into batches of 90. All batches including 10% QA/QC samples including a commercially prepared standard, blank, and field duplicate. Sample batches were periodically shipped directly to SGS in Ulaanbaatar via Erdene’s logistical contractor, Monrud Co. Ltd.

The majority of holes reported in this release were drilling with a -60 dip and 030 azimuth. Due to geologic variability within the deposit all reported intervals are interpreted to be 80-100% true thickness. Reported grades for intervals are weighted averages based on length of sampling intervals.  No top cut has been applied; however, all contiguous intervals greater than 10 g/t gold and 100 g/t gold are reported individually for clarity.

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 obligation 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

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