Copper One Resources has reported high copper concentrations from underground sampling at its Majuba Hill Copper-Silver-Gold Project in Pershing County, Nevada, US.
According to results from a recent breccia mapping programme within the historic Middle Adit, sample MHR-793 yielded assay values of 10.5% copper and 188 grams per tonne (g/t) silver.
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The samples, collected as part of a spring 2026 surface geological mapping campaign, were taken to study breccia textures at 15 different locations.
Eight rock samples previously collected from the area in 2016 returned values ranging from 0.39% to 1.6% copper.
The company stated that sample MHR-793, along with adjacent sample MHR-794, included oxide copper identified as azurite within intrusive breccias containing tourmaline matrix.
Underground mapping in the Middle Adit also confirmed breccia characteristics seen in earlier surface mapping and exposed both a known north-east-trending breccia system and a previously under-reported north-north-west-trending breccia corridor.
Copper One says this new geological understanding boosts its 2026 drill programme by clarifying structural targets and suggesting new areas where high-grade copper mineralisation may be present.
Prior drill-holes have intersected copper and silver-bearing hydrothermal-magmatic breccias.
These include MHB-2, which returned 44.5m grading 1.41% copper and 97.6g/t silver, and MHB-32, which reported 115.7m at 0.33% copper and 16.97g/t silver, with a higher-grade interval of 12.2m at 1.36% copper and 13.33g/t silver.
Majuba Hill covers approximately 9,684 acres and is situated roughly 113km south-west of Winnemucca, Nevada, and 251km north-east of Reno.
The site is reached by county roads and supported by infrastructure such as roads, power, water and access to skilled personnel.
Copper One president and CEO David Greenway said: “Majuba Hill has entered an exciting new phase with drilling now under way on our initial ExploreTech AI-designed core hole.
“Recent underground mapping within the historic Middle Adit has strengthened our geological model by confirming breccia-hosted copper mineralisation and its relationship to surface structures.”
Last month, the company began drilling the first diamond drill core hole designed using AI at its Majuba Hill project.
