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ONYX.V ·

Onyx Gold Bolsters Munro-Croesus Land Position with Large New Acquisition in

Corporate Updates

Onyx Gold Bolsters Munro-Croesus Land

Position with Large New Acquisition in

Timmins, Ontario

Vancouver, British Columbia--(Newsfile Corp. - September 9, 2024) -

Onyx Gold Corp.

(

TSXV:

ONYX

) (

OTCQX: ONXGF

) ("

Onyx

" or the "

Company

") is pleased to announce that it has completed

the acquisition of a portfolio of Properties (the "

Property

") from an arm's length party (the "

Vendor

")

located in the Matheson area, east of Timmins, Ontario.

The Matheson portfolio, consisting of four (4) properties (Highway, Tax, Hewitt, and Munro), increases

the Munro-Croesus Property ("

Munro-Croesus

" or the "

Project

") to 10,411 ha (104 km

2

), a 12%

increase (

Figure 1

). This adds substantial exploration potential across this relatively underexplored yet

highly prospective section of the Timmins Gold Camp. The Properties are contiguous or proximal with

Munro-Croesus and are host to multiple high-grade and bulk-tonnage gold occurrences.

"Acquiring this portfolio of properties is another strategic addition to our Munro-Croesus Project," said

Brock Colterjohn, President & CEO. "It offers excellent potential for additional mineral discoveries

adjacent to our emerging Argus Zone and GM discoveries, including key ground on trend to the west

along the Pipestone Fault. We believe that there is significant untapped opportunity for both high-grade

and bulk-tonnage discoveries on these properties that have seen little to no work in a very long time. In

our view, the work completed to date has only scratched the surface of the Properties' potential, and we

look forward to designing and implementing a drill program in the near future."

Highlights of the Properties:

A large (1,150 ha) portfolio of properties (Highway, Tax, Hewitt, and Munro) (

Figure 2)

contiguous

and proximal to Munro-Croesus, McEwen Mining's Black Fox Mine Complex, Mayfair Gold's 3.5

Moz Au Fenn-Gib Deposit and STLLR Gold's >12.0 Moz Au Golden Highway project

1

.

The Highway property includes two known gold-bearing structures: the 50-140m wide and 1,400m

long east-west striking Flipper Zone; and the L15 Zone (the NE-SW trending faulted extension of

the Flipper Zone). Historic drilling at the Flipper Zone returned

1.0 grams/tonne gold (

"

g/t Au

")

over

42.6m

and

1.3 g/t Au over 28.8m

, including

10.8 g/t Au over 1.5m,

while drilling at the L15

Zone returned

6.0 g/t Au over 1.0m

2

.

At the Stewart-Abate zone on the Highway Property, an old, inclined shaft (37m deep) was sunk

during 1915-1941 era and returned a 52 tonne bulk sample grading

24 g/t Au

. Historical drilling

returned

9.6 g/t Au over 1.2m

, along with grab samples of up to

13.5 g/t Au

2

. Drifting at the 20m

level followed the main quartz-carbonate-pyrite-chalcopyrite vein (with rare visible gold and

molybdenite) within a sheared diorite body for

67m at an

average width of 1.8m and grade of

10.6 g/t Au

2

. The prospect has not been explored for at least 25 years.

The Hewitt property is situated on a northeast-trending secondary fault splay to the Painkiller Fault

and contains gold-bearing mineralization with grab samples yielding

15.7 g/t Au, 5.6 g/t Au, 4.8

g/t Au, and 2.5 g/t Au

2

.

Year-round access to the properties is provided via the paved Highway 101 and secondary roads.

Transaction Details

The consideration to be paid by the Company to the Vendor for the Property is $150,000 cash and

750,000 common shares of Onyx. The Vendor will also retain a 2.0% NSR royalty on the Property, which

includes a buydown of half of the NSR royalty (1% NSR) for $1,000,000 and a right of first refusal to

purchase the residual royalty.

In addition, for a period of 15-years from the closing date of the

agreement, if a cumulative mineral resource exceeding 1,000,000 ounces of gold in the Measured and

Indicated categories is defined on the Property the Company shall make a one-time bonus payment of

$1,000,000 to the Vendors.

Figure 1 - Munro-Croesus Property Location With Newly Acquired Properties

To view an enhanced version of this graphic, please visit:

https://images.newsfilecorp.com/files/9800/222772_ad05001064dc4a87_002full.jpg

Figure 2 - Munro-Croesus Property Top Gold Targets (New Targets are Highlighted in Yellow)

To view an enhanced version of this graphic, please visit:

https://images.newsfilecorp.com/files/9800/222772_ad05001064dc4a87_003full.jpg

About the Munro-Croesus Project

The Munro-Croesus Project is located along Highway 101 in the heart of the Abitibi greenstone belt,

Canada's premier gold mining jurisdiction. This large, 100% owned land package includes the past-

producing Croesus Gold Mine, which yielded some of the highest-grade gold ever mined in Ontario.

Extensive land consolidation from 2020-2024 has unified the patchwork of patented and unpatented

mining claims surrounding the Croesus Gold Mine into one coherent package (

Figure 1

) and enhanced

the exploration potential of the Project.

The Project covers 104 km

2

of highly prospective geology within the influence of major gold-bearing

structural breaks. Bulk-tonnage gold deposits located in the immediate region include the Fenn-Gib gold

project being developed by Mayfair Gold Corp. that contains an Indicated Resource of 3.38 Moz at 0.93

g/t Au and an Inferred Resource of 157 koz at 0.85 g/t Au, and the Tower Gold Project being developed

by Moneta Gold Inc. that contains an open pit Indicated Resource of 4.46 Moz at 0.92 g/t Au and an

Inferred Resource of 8.29 Moz at 1.09 g/t Au

1

.

About the Timmins Area Gold Properties

Onyx owns 100% of each of its three Timmins properties. The Munro-Croesus Gold Project is located

approximately 75 km east of Timmins, proximal to the Porcupine-Destor and Pipestone Faults, and

approximately 2 km northwest and along trend of Mayfair Gold Corp.'s multi-million-ounce Fenn-Gib gold

deposit. Mining occurred intermittently at Munro-Croesus between 1915 and 1936. The Golden Mile 140

km2 property is located 9 km northeast of Newmont's multi-million-ounce Hoyle Pond deposit in

Timmins. The Timmins South 187 km2 property is located to the south and southeast of Timmins and

surrounds the Shaw dome structure.

About Onyx Gold

Onyx Gold is an exploration company focused on well-established Canadian mining jurisdictions, with

assets in Timmins, Ontario, and Yukon Territory.

The Company's extensive portfolio of quality gold

projects in the greater Timmins gold camp includes the Munro-Croesus Gold property, renowned for its

high-grade mineralization, plus two additional earlier-stage large exploration properties, Golden Mile

and Timmins South.

Onyx Gold also controls four properties in the Selwyn Basin area of Yukon Territory,

which is currently gaining significance due to recent discoveries in the area.

Onyx Gold's experienced

board and senior management team are committed to creating shareholder value through the discovery

process, careful allocation of capital, and environmentally/socially responsible mineral exploration.

Qualified Person and Quality Assurance

Ian Cunningham-Dunlop, P.Eng., Executive Vice President for Onyx Gold Corp. and a qualified person

("

QP

") as defined by Canadian National Instrument 43-101, has reviewed and approved the technical

information contained in this release.

On Behalf of Onyx Gold Corp.

"

Brock Colterjohn

"

President & CEO

For further information, please visit the Onyx Gold Corp. website at

www.onyxgold.com

or contact:

Brock Colterjohn, President & CEO

or

Nicole Hoeller, VP of Corporate Communications

Phone:

1-604-629-1165

or North American toll-free

1-855-629-1165

Email:

[email protected]

or

[email protected]

.

Website:

www.onyxgold.com

LinkedIn:

https://www.linkedin.com/company/onyx-gold-corp/?viewAsMember=true

Twitter:

https://twitter.com/OnyxGoldCorp

1

.

Fenn-Gib Gold Project and Tower Gold Project mineral resources compiled from public sources

and are provided for general information purposes. Readers are cautioned that the Company

has no interest in or right to acquire any interest in adjacent properties and they are not

indicative of mineral deposits on the Company's properties or any potential exploration thereof.

2

.

The Company cautions that none of the historical results from the Property, including drill

results and underground sampling results from the 1915-1941 era, have been verified. Assay

methods and sampling techniques are not disclosed in the historic reports and the QP has been

unable to verify any of the historical technical information in this release. Historical results

discussed herein are presented more generally as an indication of the potential of the Property

to host gold-bearing systems and this information is not necessarily indicative of additional

mineralization occurring on the Property.

Forward looking information: This news release includes certain "forward-looking information" within

the meaning of Canadian securities legislation and "forward-looking statements" within the meaning

of the United States Private Securities Litigation Reform Act of 1995 (collectively "forward looking

statements").

Forward-looking statements include predictions, projections, and forecasts and are often, but not

always, identified by the use of words such as "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. All statements other than statements of historical fact

included in this release, including, without limitation, statements regarding the Company's planned

exploration programs and drill programs and potential significance of results including the new high-

grade vein structure at the Munro Croesus property described above, are forward-looking statements

that involve various risks and uncertainties. There can be no assurance that such statements will

prove to be accurate and actual results and future events could differ materially from those anticipated

in such statements. Forward-looking statements are based on a number of material factors and

assumptions. Important factors that could cause actual results to differ materially from Company's

expectations include actual exploration results, changes in project parameters as plans continue to

be refined, results of future resource estimates, future metal prices, availability of capital, and

financing on acceptable terms, general economic, market or business conditions, uninsured risks,

regulatory changes, defects in title, availability of personnel, materials, and equipment on a timely

basis, accidents or equipment breakdowns, delays in receiving government approvals, unanticipated

environmental impacts on operations and costs to remedy same, 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 forward-looking statements will prove to be accurate, and accordingly readers

are cautioned not to place undue reliance on forward-looking statements.

To view the source version of this press release, please visit

https://www.newsfilecorp.com/release/222772