Prismo Metals Reports 4,811 g/t Silver and Confirms Deep Porphyry Copper Potential Beneath Historic Silver King Mine, near Resolution Copper in Arizona

Prismo Metals Inc. has announced highly encouraging results from its Phase I drill program at the Silver King project in Arizona's Superior Mining District, completing eight holes totaling 1,272 meters. The program delivered multiple bonanza-grade silver intercepts, with the standout result from hole SK-26-08 returning 2.3 meters grading 1,452 g/t silver, 1.6 g/t gold and 1.9% copper, including a spectacular 0.4-meter interval at 4,811 g/t silver, 4.6 g/t gold, 5% copper and 3% lead. Additional high-grade intervals included 2.7 meters at 557 g/t silver and 1.2 meters at 517 g/t silver, confirming that the upper portion of the pipe-like mineralized body remains largely unmined with significant exploration potential.

The program's second major achievement was confirming deep porphyry copper potential beneath the historic silver workings. Hole SK-26-07, drilled to 488 meters depth, intersected distinct intrusive phases with potassic alteration and abundant pyrite disseminated throughout. Copper values increased dramatically downhole by approximately 70 times, averaging nearly 0.05% copper in the bottom 73 meters and locally reaching 0.11% copper, compared to background levels of 0.0013% in overlying zones. The presence of potassic alteration at relatively shallow depths is unusual for the district and suggests the Silver King mineralized pipe may represent a late-stage component of a much larger hydrothermal system.

The discovery has significant implications for the broader Superior Mining District, located near Resolution Copper's major development project. The data suggest Silver King may represent a telescoped system where high-temperature porphyry-style alteration at depth has been overprinted by later, shallower epithermal silver and base metal veins. This interpretation is supported by classic geochemical vectors including declining lead, zinc, antimony and mercury values coupled with rising strontium and sodium, all pointing toward a possible porphyry copper source at depth.

Prismo's immediate next steps include completing reconnaissance mapping across key zones, analyzing 23 rock samples from recent fieldwork, and implementing a comprehensive propylitic mineral chemistry program in collaboration with academic partners. The company has successfully demonstrated that Silver King offers dual value propositions: near-surface bonanza-grade silver mineralization that remains largely unmined, potentially rooted in a hidden porphyry copper system that could represent a district-scale discovery in one of Arizona's most prolific mining regions.