Mr. Alain Lambert reports

PRISMO METALS APPOINTS PORPHYRY EXPERT PROF. JAMIE WILKINSON FOR PROPYLITIC MINERAL CHEMISTRY TARGETING AT SILVER KING PROJECT

Prismo Metals Inc. has appointed Prof. Jamie J. Wilkinson, professor of geology at Imperial College London and senior mineral exploration consultant, to assist with the application of advanced propylitic alteration mineral chemistry techniques at its Silver King project in the Pioneer mining district near Superior, Ariz.

Prof. Wilkinson will work directly with Prismo's technical team, led by chief exploration officer Dr. Craig Gibson and special adviser Dr. Linus Keating, to deliver a focused, high-impact evaluation of the extensive propylitic green-rock alteration halo that surrounds known mineralization and geophysical anomalies at Silver King. This halo -- dominated by chlorite, epidote and pyrite -- forms a large geochemical footprint that can extend several kilometres from a porphyry centre and is particularly well developed in the same Laramide-aged volcaniclastic breccias, sandstones and Proterozoic dolerite sills that host the giant Resolution porphyry copper-molybdenum deposit only 3.4 kilometres away.

The program will proceed in four integrated stages:

• Strategic site selection: Prof. Wilkinson will collaborate with Dr. Gibson and Dr. Keating to identify and prioritize approximately 20 optimal sample locations across the propylitic alteration zone. Sites will be chosen based on existing mapping, pyrite halo distribution, hydrothermal breccias, geophysical targets and distance to known mineralization to maximize vectoring potential.
• High-precision sampling and analysis: Representative samples will be collected and analyzed using state-of-the-art, in situ techniques -- electron microprobe for major and minor elements plus laser ablation ICP-MS (LA-ICP-MS) for a full suite of trace elements -- using laboratories and staff experienced in the approach at the Natural History Museum in London. Both chlorite and epidote will be systematically analyzed grain by grain.
• Quantitative vectoring and 3-D modelling: Prof. Wilkinson will apply the chlorite proximitor methodology (which he co-developed) together with complementary epidote chemistry and chlorite geothermometry. Key element ratios (such as titanium/lithium, titanium/strontium and vanadium/cobalt) and temperature-sensitive indicators vary systematically with distance from the porphyry centre. These ratios can change by several orders of magnitude across the propylitic halo, enabling calculation of distance to the hydrothermal centre (typically with uncertainties of a few hundred metres). Discrimination methods using chlorite and epidote chemistry will be used to screen samples for false anomalies related to epithermal overprints and data will be evaluated to assess potential metal endowment of the system. The team will integrate these results with thermal gradients to generate robust 3-D vector models that point toward the most likely location of the concealed porphyry copper-molybdenum system.
• Technical reporting and drill targeting: Prof. Wilkinson will deliver a comprehensive report interpreting all mineral chemistry data, including prioritized 3-D drill targets. This will directly inform Prismo's phase 2 drilling program and help derisk targeting in areas of post-mineral cover or distal propylitic alteration.

This approach builds directly on the successful blind test of the same methodologies at the Resolution copper deposit (Cooke et al., 2020, Economic Geology), where LA-ICP-MS chlorite data and proximitor calculations from a limited suite of propylitic samples precisely located the concealed porphyry centre between sample clusters -- a target that would have resulted in the discovery of Resolution beneath thick Tertiary cover. The shared Laramide geology, alteration style and district setting make these tools highly applicable at Silver King.

"I am excited to collaborate with the Prismo team, including Dr. Craig Gibson and Dr. Linus Keating, on the Silver King project," said Prof. Wilkinson. "The propylitic alteration halo offers a powerful, underutilized search space. By applying chlorite and epidote mineral chemistry -- particularly proximitor ratios validated at the nearby Resolution deposit -- we hope to be able to systematically vector toward the magmatic-hydrothermal centre even under cover, refining targets with a precision that complements traditional mapping, geophysics and drilling."

"Bringing Prof. Wilkinson on board represents a major step forward for Prismo's next phase of drilling at Silver King," said Alain Lambert, chief executive officer of Prismo Metals. "His expertise in using trace-element chemistry of chlorite and epidote to vector within green-rock alteration, proven in the blind test at Resolution only 3.4 kilometres away in the same Laramide host rocks, directly strengthens our ability to locate concealed porphyry systems at Silver King. Having Prof. Wilkinson working with our team will enable us to generate high-confidence, data-driven targets for phase 2 drilling."

"The green-rock targeting methodologies are a perfect fit for our evolving model at Silver King," added Dr. Craig Gibson, PhD, CPG, chief exploration officer. "Integrating high-resolution mineral chemistry vectors with our phase 1 drilling results, mapping of pyrite halos and hydrothermal breccias, and geophysical data -- in close collaboration with Dr. Linus Keating -- will provide a robust framework to locate the porphyry source. This scientific approach significantly enhances our exploration in this highly prospective district."

About Prof. Wilkinson

Prof. Jamie J. Wilkinson, PhD, is a leading economic geologist specializing in the geochemistry of hydrothermal systems and the development of mineral chemistry tools for porphyry exploration. He is professor of geology at Imperial College London and co-founder of the London Centre for Ore Deposits and Exploration (LODE), a joint initiative between Imperial College and the Natural History Museum in London. He is currently also a senior consultant in mineral exploration, working globally with Barrick Mining Corp. He was involved in the development of the green-rock targeting methodology (Wilkinson et al., 2015) and has been involved in its successful application across a range of porphyry systems, including the blind test validation at Resolution in Arizona (Cooke et al., 2020). This work has shown that chlorite and epidote trace-element chemistry can define large exploration footprints and deliver quantitative vectors even in distal or covered propylitic environments.

About Prismo Metals Inc.

Prismo is a mining exploration company focused on advancing its copper porphyry Silver King project in Arizona.

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