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American Pacific Mining Corp’s Constantine Joint Venture Commences 9,000-Metre Drill Program at Palmer Project

Resource Estimates Exploration Programs

American Pacific Mining Corp’s Constan�ne Joint Venture Commences 9,000-Metre Drill Program at Palmer Project

Vancouver, Bri�sh Columbia / June 19, 2023 – American Pacific Mining Corp (CSE: USGD / OTCQX: USGDF / FWB: 1QC) (“American Pacific” or the “Company”) is pleased to announce its 2023 drill program has commenced at the Palmer Project (“Palmer” or the “Project”), an advanced-stage, high-grade volcanogenic massive sulphide-sulphate (“VMS”) located in the Porcupine Mining District of the Haines Borough, Alaska. The drill program, which will focus on several high priority targets, is a central component of the Company’s US $25.5 million 2023 explora0on program backed by joint venture partner Dowa Metals & Mining Co., Ltd (“Dowa”).

The 9,000 metre (“m”) resource infill drill program at the Southwall Zone is designed to begin the process of upgrading mineral resources from Inferred to Measured and Indicated. The Palmer Deposit (Southwall and RW Zones) hosts an Indicated mineral resource of 4.68 million tonnes grading 5.23% zinc, 1.49% copper, 30.8 grams per tonne (“g/t”) silver, 0.30 g/t gold; and Inferred mineral resource of 5.34 million tonnes grading 5.20% zinc, 0.96% copper, 29.2 g/t silver, 0.28 g/t gold. ¹

“Our drill program this year has been designed with two primary goals: to delineate the high-grade por0on of the deposit to further define the mineral resource es0ma0on methodology as we look to convert mineral resources into mineral reserves in future feasibility studies; and to expand our mineral resource base with step-out and direc0onal drilling in the Southwall Zone,” said Peter Mercer, Senior Vice President, Advanced Projects. “This year’s programs will lay the founda0on for the engineering and evalua0on work ahead. In addi0on, the knowledge gained from these programs will provide new insights into the poten0al for new high-grade discoveries throughout the mineralized district.”

The Company’s joint venture partner, Dowa, has commiFed to fund the US $25.5 million 2023 program. American Pacific has the op0on to pay its pro-rata share of 2023 program expenses, in whole or in part, prior to October 31, 2023, to minimize or eliminate Project dilu0on. Dilu0on is pro-rated according to each party’s rela0ve contribu0ons to Project expenditures and will be determined upon comple0on of the 2023 program. American Pacific is the operator of the Project and will receive seven percent (7%) of qualified program expenditures for managing the 2023 work program.

Qualified Person Statement

The technical informa0on in this news release has been reviewed and approved by Michael Vande Guchte, P.Geo., VP Explora0on for the Palmer Project and a qualified person as defined by Na0onal Instrument 43- 101, Standards of Disclosure for Mineral Projects.

About the Palmer Project

The Palmer Project is a promising advanced-stage high-grade VMS project located within the Porcupine Mining District of the Haines Borough, Alaska. The Project is operated in a joint venture partnership between American Pacific, through its wholly owned subsidiary, Constan0ne North Inc. as the manager (operator), with 41% ownership and Dowa Metals & Mining Co., Ltd (Dowa), with 59% ownership.

As of December 31, 2022, US $68.7 million has been invested in explora0on work and environmental programs to responsibly advance the Palmer Project, which hosts a Na0onal Instrument 43-101 compliant mineral resource of 4.68 million tonnes of 10.2% zinc equivalent (3.9% copper equivalent) in the Indicated category and 9.59 million tonnes of 8.9% zinc equivalent (3.4% copper equivalent) in the Inferred category.

About American Pacific Mining Corp.

American Pacific Mining Corp. is a precious and base metals explorer and developer focused on opportuni0es in the Western United States. The Company has two flagship assets: the Palmer Project, a Volcanic Massive Sulfide (VMS) project in Alaska, under joint-venture partnership with Dowa Metals & Mining, owner of Japan’s largest zinc smelter; and the Madison Project, a past-producing copper-gold project in Montana partnered with KennecoF Explora0on, a division of the Rio Tinto Group. For the Madison transac0on, American Pacific was selected as a finalist in both 2021 and 2022 for ‘Deal of the Year’ at the S&P Global PlaFs Global Metals Awards, an annual program that recognizes exemplary accomplishments in 16 performance categories. Also, in American Pacific’s asset porRolio are three highgrade, precious metals projects located in key mining districts of Nevada, USA: the Ziggerat Gold project, partnered with Centerra Gold; the Gooseberry Silver-Gold project; and the Tuscarora Gold-Silver project. The Company’s mission is to grow by the drill bit and by acquisi0on.

On behalf of the American Pacific Mining Corp Board of Directors:

Warwick Smith, CEO & Director Corporate Office: Suite 910 – 510 Burrard Street Vancouver, BC, V6C 3A8 Canada

Investor rela�ons contact:

Kris0na Pillon, High Tide Consul0ng Corp.

604.908.1695 / Kris�[email protected]

Media rela�ons contact:

Adam Bello, Primoris Group Inc.

416.489.0092 / [email protected]

¹Amended NI 43-101 Technical Report Palmer Project Alaska, USA, JDS Energy and Mining Inc. 2019

The CSE has neither approved nor disapproved the contents of this news release. Neither the CSE nor its Regula0on Services Provider (as that term is defined in the policies of the CSE) accepts responsibility for the adequacy or accuracy of this release.