PROJECT

Keystone Polymetallic Project

Pershing and Humboldt Counties, Nevada, USA

OVERVIEW

Summit Minerals’ Keystone Polymetallic Project is located along the emergent Pershing Trend, transgressing the boundary between the Pershing and Humboldt Counties in Northern Nevada, USA. Nevada is widely recognised as a mining destination endowed with world-class precious and base metals projects within the Basin and Range Province geological system, in regionally extensive "trends" such as the Carlin, Getchell, Independence, and Battle Mountain Trends. The Keystone Project is located close to the major regional centre of Winnemucca, with direct access to energy and water, and has a road running directly to the project from a major local highway (10km away).

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PROJECT HIGHLIGHTS

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High-grade silver, plus tungsten, gold and zinc mineralisation

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Total project area covers approximately 1036 acres, 635 of which is deeded (privately held by Summit) land.

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Proximity to established infrastructure, including water, power, roads and ports, facilitating efficient transportation and logistics

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Exceptional silver grades from historic production (>1,000 g/t Ag)

Last phase of production 1917-1943, 36,000 oz Ag produced from just 1,700 tonnes

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Outcropping mineralisation across project, multiple untested veins

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Exceptional WO3 grades from historical (1940) drill-core intercepts, never followed up due to WWII

Samples range in grade between 0.4% to 2.25% WO3 within 22 ft (~6.7 m) interval

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Experienced US based team actively implementing initial geophysical and field based campaign early 2026

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Mineralisation at Keystone

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Keystone Geology