Spartan Metals has confirmed the presence of two tungsten skarn zones at the Tungstonia claims within its wholly owned Eagle Tungsten-Silver-Rubidium Project in Nevada, US.
The company reported these results as part of its ongoing exploration programme, which began in May 2026.
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The Eagle Project spans approximately 36.5km² in the Kern Mountains of White Pine County. It covers 9,033 acres and 445 unpatented lode mining claims managed by the US Bureau of Land Management (BLM).
Rock sampling from the historic Yellow Jacket Mine, located within the project area, returned tungsten trioxide grades ranging from 0.89% to 1.87%.
Two samples exceeded past production grades of approximately 1.12% tungsten trioxide.
Additional assays from the mine entrance and dumps detected notable concentrations of zinc (up to 3.3%) and 1,320 parts per million (ppm) beryllium, the latter having not been reported previously at the Eagle Project.
Backpack core drilling at the mine returned a 0.3m interval grading 0.21% tungsten trioxide and 0.33% zinc.
A newly identified tungsten skarn zone was also confirmed at the south-east Tungsten Anomaly, an area of the project where rock chip samples recorded 0.34% tungsten trioxide, 1.9 grams per tonne (g/t) silver and 144ppm beryllium.
Drilling in this area revealed previously unobserved molybdenum levels between 0.01% and 0.08%, and rubidium concentrations ranging from 1,122 to 2,122ppm, along with silver between 1.2 and 3.1g/t.
The confirmed mineralisation, which stretches across an estimated 2km area, comprises tungsten, molybdenum, beryllium and silver.
The drilling targeted altered Guilmette Formation rocks, which are recognised for hosting mineral deposits in Nevada near the Tungstonia Pluton.
Spartan Metals intends to continue exploration, including surface sampling, further backpack drilling, ground geophysical surveys, and approximately 3,000m of diamond core drilling at selected targets from early to mid-August.
Spartan Metals president and CEO Brett Marsh said: “The identification of a new tungsten-skarn occurrence within a previously defined tungsten soil anomaly marks an important exploration milestone at our Tungstonia claims and further validates our systematic targeting approach across the property.
“Particularly encouraging is the discovery [of] molybdenum and beryllium mineralisation associated with the tungsten skarn zones.
“The presence of these critical metals alongside tungsten not only highlights the evolving potential of the Eagle Project but also suggests a larger and more complex mineralising system than was previously recognised.”
