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 released final Phase I drilling results at its Silver King project in Arizona (8 holes, 1,272 m). Hole SK‑26‑08 intersected 2.3 m averaging 1,452 g/t Ag, 1.6 g/t Au and 1.9% Cu, including a 0.4 m core of 4,811 g/t Ag, 4.6 g/t Au, 5% Cu and 3% Pb. Other high-grade intervals confirm widespread unmined bonanza silver in the upper pipe-like body. The deep test hole SK‑26‑07 encountered potassic alteration and a dramatic downhole copper increase (~70×, to locally 0.11% Cu over 73 m) accompanied by a sharp decline in Pb‑Zn‑Sb‑Hg and rise in Sr‑Na, classic geochemical vectors toward a porphyry source. The data support a telescoped system: shallow epithermal Ag veins overprinting deeper porphyry-style Cu‑Au mineralization. The project lies 3.4 km from the world-class Resolution Copper deposit (Rio Tinto/BHP). Next steps include integrating 23 pending rock samples, a 4-stage propylitic mineral chemistry program, and finalizing Phase 2 drill targets for the porphyry core.

The release provides the strongest evidence to date that the Silver King hosts both high-tenor, near-surface silver mineralization and a bona fide porphyry copper‑gold target at depth. The bonanza-grade silver intercepts exceed many prior surface-grab values and confirm that the historic mine’s upper zones are largely intact and drill‑ready. More importantly, the deep hole’s 70‑fold rise in copper coupled with potassic alteration and supportive geochemical pathfinders materially de‑risks the porphyry exploration thesis and substantially expands the project’s scale potential. For a micro‑cap explorer with a ~CAD 10 M market cap, moving from a pure high‑grade silver story to a credible copper‑porphyry play anchored next to Resolution Copper could re‑rate the stock. The news is genuinely new (assays were pending since April; the market had no prior confirmation of copper grades or alteration intensity) and should prompt a positive market reaction.

Prismo Metals is a junior explorer focused on precious and base metals in Arizona and Mexico. Its flagship Silver King project (historic production ~6 Moz Ag) sits in the Arizona Copper Belt, 3.4 km from Resolution Copper. The company also holds the Ripsey Gold project (high-grade Au‑Ag‑Cu‑Zn veins on patented land) and the Palos Verdes silver project in Mexico. Prismo recently assigned its Hot Breccia copper project to Blade Resources, retaining a ~24% equity stake and board representation, allowing it to concentrate resources on Silver King. The company’s shares trade on the CSE.