Vancouver-based American Pacific Mining has announced an updated mineral resource estimate for its 100%-owned Palmer VMS project in Alaska.

The updated estimate, conducted by SRK Consulting, marks a milestone for the advanced-stage project, which has seen substantial exploration and development efforts in recent years.

The 2025 resource estimate highlights notable increases in mineral resources, underscoring the potential of the Palmer project to contribute to the company’s growth trajectory. The indicated resource now stands at 4.77-million tonnes, grading 1.69% copper, 5.17% zinc, 0.14% lead, 28.4 g/t silver, 0.29 g/t gold, and 20.6% barite. This equates to a 3.5% copper equivalent or 13.2% zinc equivalent.

The updated estimate reflects a 16% increase in contained copper, translating to an additional 24-million pounds, bringing the total to 178-million pounds of copper, alongside increases in zinc, silver, and gold resources.

The inferred resource has also seen growth, with an updated estimate of 12-million tonnes grading 0.57% copper, 3.92% zinc, 0.47% lead, 66.3 g/t silver, 0.33 g/t gold, and 25.5% barite, equivalent to 3.1% copper or 8.9% zinc. This represents a 22% increase in contained copper, adding 28-million pounds to the total inferred copper resource, which now stands at 151.5-million pounds. The inferred category also boasts significant quantities of zinc, silver, and gold, along with more than three-million tonnes of barite.

“This updated mineral resource estimate marks a major project milestone now that American Pacific has secured 100% ownership of the Palmer VMS project. Infill and geotechnical drilling over the last several years has been successful in increasing our confidence in the known deposits, and we are thrilled to see significant increases in the in-situ copper estimate, in addition to an overall increase in contained tonnes for the project,” commented CEO Warwick Smith.

Besides the Palmer project, American Pacific also owns the past-producing Madison copper and gold project in Montana, the Ziggurat gold project, and the high-grade Tuscarora gold/silver project in Nevada.