American Pacific Mining Identifies Large-Scale MT Anomaly at Madison Project with Drill Testing Underway

Executive Summary

• American Pacific Mining Corp. has commenced drilling at a new, high-priority target at its 100%-owned Madison Copper-Gold Project in Montana, identified through a recent magnetotelluric (MT) inversion survey.
• The target is a large, highly conductive geophysical anomaly (~2 km x 600 m) located in a previously undrilled portion of the district, with the initial hole planned to reach ~800 metres to evaluate for sulfide-bearing skarn, carbonate replacement-style mineralization, or concealed intrusive sources.
• The company's 2026 exploration program consists of a 15,000-metre drill campaign targeting this new anomaly alongside known skarn zones and deeper intrusive-related features, with a second reverse circulation drill expected on-site within two weeks.

Key Details

• Drilling Commencement: Core drilling to test the newly identified MT anomaly is now underway at the Madison Project.
• Geophysical Target Dimensions: Large-scale, highly conductive anomaly measuring approximately 2 kilometres by 600 metres.
• Drill Plan & Depth: Initial hole designed to reach a total depth of approximately 800 metres to test the core of the conductive feature.
• Structural & Geological Context: The conductor trends north-northwest to south-southeast, mirrors the district's structural architecture, and is spatially associated with the Silver Star fault corridor and associated splays.
• Mineralization Potential: Strong apparent structural relationship suggests potential connectivity between deeper conductive features and shallower zones, possibly representing alteration, carbonate replacement-style (CRD) mineralization, or skarn-related mineralization.
• 2026 Exploration Program: 15,000-metre drill program (details announced June 1, 2026) encompassing the new MT anomaly, continued evaluation of known skarn mineralization, and deeper intrusive-related targets.
• Equipment & Timeline: A second reverse circulation (RC) drill is expected to arrive on-site within two weeks to focus on shallower skarn targets.
• Qualified Person: Eric Saderholm, P.Geo., Managing Director of Exploration, has reviewed and approved the technical aspects under NI 43-101.
• Technical Caution: Geophysical anomalies are not direct evidence of mineralization; the initial hole will provide critical data on lithology, alteration, structure, and sulfide content to validate the target.

Notable Quotes

• Eric Saderholm, Managing Director of Exploration: "We have now received the final inversions of the MT survey conducted at Madison in March of this year. The resolution and clarity of the newly acquired MT data far surpass any historical geophysical techniques that have been used to understand the Project, to date. The quality of the anomaly has allowed us to refine the azimuth and dip of our targets to more accurately test this impressive conductive feature and core drilling to test the porphyry is now underway. A second reverse circulation drill, expected to arrive on-site within two weeks, will focus on the shallower skarn targets."