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Abacus Provides Update on Willow Drilling

Exploration Programs

Abacus Provides Update on Willow Drilling

Vancouver, BC – October 28, 2021. Abacus Mining & Exploration Corporation (“Abacus” or

the “Company”) (TSXV: AME) wishes to provide an update on the Willow porphyry copper

drilling program in the Yerington copper camp, southeast of Reno, Nevada.

The program began in early July and the third drill hole has now been terminated , with

approximately 1700 metres drilled . All holes to date have intersected the Luhr Hill porphyry,

which is the host rock of the four known porphyry copper -molybdenum deposits in the

Yerington camp. Previous drilling in 2018 also intersected this rock unit, marking the first new

discovery of this rock unit and of a new potential copper-molybdenum porphyry deposit in the

Yerington camp in over forty years.

The Company has decided to defer drilling the final hole of the program, as it cannot be

completed prior to the onset of winter conditions on the property. This deferral will also allow

time for logging and sampling of the holes to be completed, which is behind schedule due to

various covid related delays. These delays were detailed in the Company’s news release of

October 6, 2021 but included technical personnel availability and various supply chain issues.

Based on past work done by Abacus the target is at least 1.5 km by 1.5 km in size and is a

blind target under later volcanics. In 2018 the drill contractor was only able to complete one of

three holes to depth, but geochemical data was able to provide vectors for the current drilling.

The 2021 program has added three more holes, but considering the size of the target , it

remains poorly tested.

Copper porphyry -molybdenum deposits at Yerington occur at the contact of the Luhr Hill

porphyry and surrounding volcanic rocks , or further into the volcanic package. Because the

target at Willow is covered, prospecting by drill is the only effective means of trying to locate a

porphyry center, and this often takes several drill campaigns to achieve. Each of the new 2021

drill holes have intersected the host Luhr Hill porphyry, and each will be extensively sampled

to provide geochemical vectors to guide further drilling. Analytical results will be reported once

received by the Company.

Abacus completed geological, geochemical and geophysical work on Willow beginning in 2017

and then undertook a short core drilling program. This drilling identified the Luhr Hill Granite on

Willow with copper values in the 0.1% to 0.2% Cu range along with elevated Mo. This was a

key new discovery, as there are no known instances of this granite in the camp without an

associated porphyry. The Molybdenum values are a particularly strong indicator that you are

close to a porphyry copper center.

Both drill programs were designed to test a very small portion of an extensive zone of intense

silicic and advanced argillic alteration, marked by coincident geological, geochemical and

geophysical signatures typical of a porphyry copper -molybdenum deposit. Porphyry copper

systems are large in extent, and geochemistry collected from the 2018 drilling indicated that a

likely porphyry center occurs north of the area initially drilled. The Company’s target is

Suite 1000 – 1050 West Pender Street

Vancouver, B.C. V6E 3S7 Canada

Tel: 604.682.0301

email: [email protected]

website: www.amemining.com

TSX Venture Exchange Symbol: AME

essentially identical to the two largest porphyry deposits in the Yerington camp, namely the

past-producing Yerington mine and the undeveloped Ann Mason deposit.

Of the porphyries in the camp , Anaconda mined the Yerington porphyry between 1952 until

1978, producing 1.6 billion pounds of copper. The undeveloped Ann Mason porphyry deposit

lies just e ast of Willow and is held by HudBay Minerals. In early April of 2021, Hudbay

announced an updated PEA on Ann Mason with a revised M&I resource of 2.2 billion tonnes

at 0.34% Cu. Nevada Copper is in production at its Pumpkin Hollow skarn (P&P of 572 MT at

0.4% Cu). Quaterra Resources recently announced drilling to support the Prefeasibility Study

that is ongoing on their MacArthur oxide copper project (M&I of 159MT at 0.212% Cu). *

Abacus has the right to earn a 75% ownership interest in the Willow property from Almadex

America Inc, a wholly owned subsidiary of Almadex Minerals Ltd. The Company also has a

lease on the contiguous Nev -Lorraine claims giving it the right to explore and to elect to

purchase these claims outright over a ten-year period. The entire claim group is known as the

Willow Property.

Abacus also holds a 20% ownership interest in the Ajax copper-gold porphyry project, located

near Kamloops, British Columbia., which is managed by base metal major KGHM Polska Miedź

S.A., who hold the remainin g 80%. The Ajax Project contains significant quantities of co pper

and gold, within a NI 43 -101 Proven and Probable Mineral Reserve of 426 Mt at 0.29% Cu,

0.19 g/t Au and 0.39 g/t Ag. Contained metal is in the order of 2.7 Bil lbs Cu, 2.6 Moz Au and

5.3 Moz Ag**.

The technical information in this news release has been reviewed and approved by Paul G.

Anderson, M.Sc., P.Geo., a Qualified Person within the meaning of National Instrument 43 -

101.

* Data is from the respective Company websites. The Quaterra report is by M3 Engineering

and Technology Corp, May 23, 2012. Amended NI 43 -101 Technical Report Preliminary

Economic Assessment Lyon County, Nevada, US.

** Wardrop Engineering Inc. 2012. Ajax Copper/Gold Project, Kamloops, British Columbia –

Feasibility Study Technical Report. Doc. No. 1054610300-REP-R0004-02. January 2012.

On Behalf of the Board,

ABACUS MINING & EXPLORATION CORPORATION

Paul G. Anderson, P.Geo.

President and CEO

About Abacus

Abacus is a mineral exploration and mine development company currently focused on copper and gold in B.C. and

Nevada. The Company’s main asset is a 20% ownership interest, together with KGHM Polska Miedź S.A. (80%),

in the proposed copper-gold Ajax Mine located southwest of Kamloops, B.C., which has undergone a joint provincial

and federal environmental assessment process. On December 14, 2017, a decision was made by the B.C. Minister

of Environment and Climate Change Strategy and the Minister of Energy, Mines and Petroleum resources to decline

to issue a n environmental assessment certificate for the Project. KGHM have recently reopened an office in

Kamloops, B.C. to facilitate First Nation, community and governmental engagement in order to advance the project

towards a potential resubmission of the environmental application.

Abacus also holds an option on the Willow copper-gold property located near Yerington, Nevada in which it can

acquire up to a 75% ownership interest, and the contiguous Nev -Lorraine claims subject to a ten -year lease

agreement.

For the latest reports and information on Abacus’ projects, p lease refer to the Company’s website at

www.amemining.com.

Forward-Looking Information

This release includes certain statements that are deemed “forward -looking statements”. All statements in this release, other t han statements of

historical facts, that address events or developments that Abacus expects to occur, are forward-looking statements. Forward-looking statements are

statements that are not historical facts and are generally, but not always, identified by the words “expects”, “plans”, “anticipates”, “believes”, “intends”,

“estimates”, “projects”, “potential” and similar expressions, or that events or conditions “will”, “would”, “may”, “could” or “should” occur. Although the

Company believes the expectations expressed in such forward-looking statements are based on reasonable assumptions, such statements are not

guarantees of future performance and actual results may differ materially from those in the forward-looking statements. Factors that could cause the

actual results to differ materially from those in forward -looking statements include changes to commodity prices, mine and metallurgical recovery,

operating and capital costs, foreign exchange rates, ability to obtain required permits on a timely basis, exp loitation and exploration successes,

continued availability of capital and financing, and general economic, market or business conditions. Investors are cautioned that any such statements

are not guarantees of future performance and actual results or devel opments may differ materially from those projected in the forward -looking

statements. Forward-looking statements are based on the beliefs, estimates and opinions of the Company's management on the date the statements

are made. Except as required by applica ble securities laws, the Company undertakes no obligation to update these forward -looking statements in

the event that management's beliefs, estimates or opinions, or other factors, should change.

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 release.