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Erdene Secures Mining License FOR Altan NAR Project, Khundii GOLD District

Permits & Approvals

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ERDENE SECURES MINING LICENSE FOR ALTAN NAR PROJECT,

KHUNDII GOLD DISTRICT

Press Release

Halifax, Nova Scotia

2020.03.10

Erdene Resource Development Corp. (TSX:ERD; MSE:ERDN) ("Erdene" or the "Company") is pleased to announce

that the Mineral Resource and Petroleum Authority of Mongolia (“MRPAM”) issued mining license MV-021547 for

the Altan Nar project. The mining license is valid for 30 years , with an option to extend for up to a total of 70

years. The Altan Nar mining license is the second mining license recently granted to the Company following the

issuance of the Bayan Khundii mining license in August 2019.

Quotes from the Company:

“Securing the Altan Nar mining license is another major accomplishment in the evolution of the Khundii Gold

District,” said Peter Akerley, Erdene’s President and CEO. “The Altan Nar license hosts high-grade resources, that

is recoverable through the Bayan Khundii gold processing facility. As outlined in the recent Khundii Gold Project

Technical Report, the Altan Nar Resource extends the life of the Bayan Khundii Gold Project, which is currently

the subject of a Bankable Feasibility Study.”

“Furthermore, the Altan Nar license shows exceptional exploration potential, as demonstrated by recent drilling

results including multiple high grade, shallow intersections of up to 45 g/t gold over 7 metres,” continued Mr.

Akerley. “Planning is underway to prepare for 2020 exploration programs expected to commence in Q2.”

Mining License

The Altan Nar mining license, MV-021547, located approximately 16 kilometres north of the Bayan Khundii Gold

Deposit, was received on March 5, 2020. (see Area Map attached). The license covers 4,668.64 hectares and

contains a NI 43 -101 reported Indicated gold-only resource of 317,700 ounces at a grade of 2 g/t gold and an

Inferred gold-only resource of 185,700 ounces at a grade of 1.7 g/t gold (see table 1 below).

Background on Altan Nar Project

Altan Nar is an intermediate sulphidation, carbonate -base metal gold (“CBMG”) deposit, that remains open at

depth and along the known 5.6-kilometre trend of the system. This deposit type includes prolific gold deposits

such as Barrick Gold’s Porgera mine (Papua New Guinea), Rio Tinto’s formerly producing Kelian mine (Indonesia),

Lundin’s Fruta Del Norte deposit, and Continental Gold’s Buritica project (Colombia). CBMG deposits generally

occur above porphyry intrusions in arc settings and may extend for more than 500 metres vertically.

Only a small portion of the Altan Nar license has been drill tested, and 90% of the NI 43-101 Mineral Resource

prepared by RPM Global in 2018 is within 150 metres of surface and primarily contained within two of the 18

targets with all zones open along strike and at depth.

In late Q4-2019, the Company drilled five holes totalling 667 metres in the Discovery Zone (“DZ”), one of 18 high-

priority targets along a 5.6 -kilometre mineralized trend on its 100% owned Altan Nar project. The Q4 -2019

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program successfully tested a concept o f a preferred high gold mineralized horizon believed to represent an

epithermal boiling zone. Four holes tested the high-grade core area of the Discovery Zone that stretches over a

130-metre strike length, 70 metres of which remains untested by drilling (“Gap Zone”). The fifth hole tested the

southern extension of the deposit.

Results from the Q4 -2019 program, including the intersection of 45.7 g/t gold, 93.4 g/t silver, 1.54% lead and

3.40% zinc over 7 metres beginning at approximately 70 metres vertical depth, within 23 metres grading 17 g/t

gold, are amongst the strongest to date. Many of the Q4-2019 high-grade intersections are locally outside or in

areas of previously low -grade resource blocks and therefore expand the DZ high -grade core indicating

consistency in high-grade mineralization within the identified ore horizon . The results of the Q4 -2019 drilling

program are expected to impact the resource at Altan Nar positively and opens the way for further expansion

along strike and elsewhere in the district. The program also demonstrated continuity of anomalous gold and

base metals along the structur al corridor to the south of the DZ, which will be tested further in upcoming

programs.

Before the Q4-2019 program, Altan Nar received limited exploration over the past two years as the Company’s

resources have been focused on the Bayan Khundii discovery. At Altan Nar structural intersections or zones of

dilation provide the setting for the emplacement of broader zones of mineralization along the main NNE trending

structural corridor. However, recent interpretation shows that in add ition, the highest grades appear to be

hosted in a preferred, near horizontal zone, now believed to represent an ep ithermal boiling event. It is th is

combination of factors that creates the optimum conditions for the depos ition of these high grades , as

witnessed in the results of the late-2019 drilling and which will help guide future exploration in this deposit and

throughout the broader 5.6 km trend.

Altan Nar Resource Estimate

RPMGlobal (“RPM”) calculated the Mineral Resource estimate for Altan Nar in May 2018 recommending to report

the Bayan Khundii Mineral Resource at a cut-off grade of 0.7 g/t AuEq (see note 8, Table 1) above a pit and 1 .4

g/t AuEq below the same pit shell . For further details on the Mineral Resource estimate please see the

Company’s May 10, 2018 news release and RPM’s Altan Nar Gold Project 43-101 Mineral Resource Technical Report,

June 21 2018.

Table 1 - Altan Nar Deposit – Mineral Resource Estimate Summary, May 7, 2018

Cut-off

AuEq

g/t

Resource

Classi-

fication

Quantity

(Mt)

Grade Contained Metal

Au Ag Zn Pb AuEq Au Ag Zn Pb AuEq

g/t g/t % % g/t Koz Koz Kt Kt Koz

0.7 Indicated 5.0 2.0 14.8 0.6 0.6 2.8 318 2,350 31.6 29.0 453

Inferred 3.4 1.7 7.9 0.7 0.7 2.5 186 866 23.7 22.3 277

Notes:

1. The Mineral Resources have been constrained by topography and a cut-off of 0.7 g/t AuEq above a pit and 1.4 g/t AuEq below the same pit shell.

2. The Mineral Resource Estimate Summary was compiled under the supervision of Mr. Jeremy Clark who is a full -time employee of RPM and a Member of

the Australian Institute of Geoscientists. Mr. Clark has suff icient experience that is relevant to the style of mineralization and type of dep osit under

consideration and to the activity that he has undertaken to qualify as a Qualified Person as defined in the CIM Standards of Disclosure.

3. All Mineral Resource figures reported in the table above represent estimates as at May 7, 2018. Mineral R esource estimates are not precise calculations,

being dependent on the interpretation of limited information on the location, shape and continuity of the occurrence and on the available sampling results.

The totals contained in the above table have been r ounded to reflect the relative uncertainty of the estimate. Rounding may cause so me computational

discrepancies.

4. Mineral Resource grades are reported in accordance with the CIM Standards.

5. Mineral Resources reported on a dry in-situ basis.

6. No dilution or ore loss factors have been applied to the reported Resource Estimate.

7. No allowances have been made for recovery losses that may occur should mining eventually resu lt.

8. Gold Equivalent (“AuEq”) calculations assume metal prices of US $1,310 p er ounce gold, US $18 per ounce silver, and US $2,400 per tonne lead and US

$3,100 per tonne zinc.

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Khundii Gold District

Erdene’s deposits are located in the Edren Terrane, within the Central Asian Orogenic Belt, host to some of the

world’s largest gold and copper-gold deposits. The Company h as been the leader in exploration in southwest

Mongolia over the past decade and is responsible for the discovery of the Khundii Gold District comprised of

multiple high-grade gold and gold/base metal prospects, two of which are being considered for develo pment:

the 100%-owned Bayan Khundii and Altan Nar projects. Together, these deposits comprise the K hundii Gold

Project.

In October of 2019, Erdene announced the results of an independent Technical Report for the Khundii Gold

Project (press release here), which included a Pre-feasibility Study (“PFS”) for the Bayan Khundii deposit and an

updated Preliminary Economic Assessment (“PEA”) for the Altan Nar deposit. The PFS and the updated PEA

results include an after -tax Net Present Value at a 5% discount rate and a US$1,300/oz gold price of US$97

million and US $24 million, Internal Rate of Return (“IRR”) of 42% and 90% for Bayan Khundii and Altan Nar

deposits, respectively. The PFS envisions an open -pit mine at Bayan Khundii from Years 0 -7, producing an

average of 61,000 oz gold per year at a head grade of 3.73 g/t gold, and an open-pit operation at Altan Nar during

Years 7-10, for an average annual production of 48,000 oz gold at an average head grade of 3.46 g/t gold, utilizing

a conventional carbon in pulp processing plant at the Bayan Khundii mine. Erdene has secured a mining license

for the Bayan Khundii deposit in August of 2019 and plans to start producing gold at Bayan Khundii in late 2021.

The Altan Nar PEA is by nature, a preliminary economic study, based in part on Inferred Resou rces. Inferred

Resources are considered too speculative geologically to hav e the economic considerations applied to them

that would enable them to be categorized as mineral reserves, which is required for a pre-feasibility or feasibility

study. Mineral resources that are not mineral reserves do not have demonstrated economic viability, and there

is no certainty that the PEA will be realized.

Erdene Resource Devel opment 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 three exploration licenses in Southwest Mongolia, where

exploration success has led to the disc overy 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 t he website; investors should

consult the site to access this information.

Qualified Person and Sample Protocol

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 ass ayed 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 ICP -OES (Inductively Coupled Pl asma

Optical Emission Spectroscopy) analysis for 33 additional elements. For samples that initially return a grade

greater than 5 g/t gold, additional screen-metallic gold analysis is carried out which provides a weighted average

gold grade from fire assay analysis of the entire +75 micron fraction and three 30-gram samples of the -75 micron

fraction from a 500 gram sample.

Erdene’s drill core 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 a t Erdene’s Bayan Khundii exploration camp. All samples

were organized into batches of 30 including a commercially prepared standard, blank and either a field duplicate,

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consisting of two quarter -core intervals, or a laboratory duplicate. Sample batches wer e periodically shipped

directly to SGS in Ulaanbaatar via Erdene’s logistical contractor, Monrud Co. Ltd.

Forward-Looking Statements

Certain information regarding Erdene contained herein may constitute for ward-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 thei r

entirety by this cautionary statement. The information contained herein is stat ed 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-/

YouTube: https://www.youtube.com/channel/UCILs5s9j3SLmya9vo2-KXoA