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Abacus Announces Drilling at Willow

Exploration Programs

Abacus Announces Drilling at Willow

Vancouver, BC – June 1, 2021. Abacus Mining & Exploration Corporation (“Abacus” or the

“Company”) (TSXV: AME) is pleased to announce that a diamond drilling program is about to

commence on its Willow porphyry copper property in the Yerington copper camp, southeast of

Reno, Nevada.

The Company plans to drill four vertical holes, each to a depth of 600 metres. The h oles will

be approximate 200-300 metre step outs from past drilling by the Company in 2018. Based on

work done by Abacus the target is at least 1.5 km by 1.5 km in size , the Willow porphyry

remains essentially untested, and the porphyry center has not yet been identified.

The Yerington camp contains four known porphyry copper-molybdenum (Cu-Mo) deposits, and

Abacus’s work points to the existence of a fifth porphyry on Willow, the first major discovery in

the camp in over 40 years. All four known copper porphyries are associated with a particular

intrusive rock known as the Luhr Hill Granite.

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.

The drilling also intersected porphyry dykes and “early halo” quartz veins associated with the

Luhr Hill Granite. The early halo quartz veins are significant, as they are found in other porphyry

copper deposits in the camp and are also associated with economic porphyry copper deposits

worldwide.

The 2018 drill program was 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 or Cu -Mo deposit . Porphyry copper

systems are large in extent, and geochemistry collected from the drilling indicates that a likely

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

identical to the two largest porphyry deposits in the Yerington camp, namely the past-producing

Yerington mine and the undeveloped Ann Mason deposit.

The Company recently engaged a consultant to review the Willow data . He agrees with

previous interpretations that Willow clearly has a signature typical of a porphyry copper or Cu-

Mo deposit. He also agrees with past recommendations that the property undergo more drilling,

as the porphyry center has not yet been identified.

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 east of Willow and is held by Hud bay 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

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

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 remaining 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 a nd

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 an 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. In addition, Abacus holds a 15-year lease on the Jersey Valley gold property, near Battle Mt., Nevada.

For the latest reports and information on Abacus’ projects, please 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 than 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, o r 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 metallur gical recovery,

operating and capital costs, foreign exchange rates, ability to obtain required permits on a timely basis, exploitation and e xploration 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 developments 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 applicable 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.