ASX-listed Olympio Metals (ASX:OLY) has begun a maiden diamond drilling campaign at its Jacknife Silver Project in Idaho’s historic Silver Valley, the first modern exploration on the ground there since 2012. The roughly 1,500 metre program is testing high-grade silver mineralisation at the Conjecture Mine and its surrounding shear zone, in a district that has already produced more than 3.2 million ounces of silver from six historic mines. For ASX investors watching the sector, it is another sign that Australian explorers are chasing brownfields silver in established North American camps while global supply stays historically tight.
A Historic Camp Gets a Modern Look
Olympio secured an 80 percent stake in Jacknife in July, and 335 acres of patented mining claims let the company move from acquisition to drill rig in about two months, avoiding the lengthy federal permitting that often slows US exploration. The program is testing vertical continuity beneath the old Conjecture workings, a roughly 520 metre strike extension, and further targets across four shear zones spanning some seven kilometres. A historical, non JORC compliant estimate from the 1970s pointed to more than 8 million ounces of silver at Conjecture alone, and the drilling aims to convert that legacy data into a modern resource, echoing recent brownfields work by ASX peer Investigator Silver at its Paris project in Utah.
Antimony Sharpens the Strategic Angle
Jacknife is not a pure silver play. Its shear zones also carry antimony, and both metals sit on the US Geological Survey’s 2025 list of critical minerals, tied to Washington’s push to secure supply chains away from Chinese processing. With the US government backing a multi billion dollar critical minerals stockpiling effort, an Idaho project offering both silver ounces and antimony credits gives Olympio a policy tailwind a straightforward gold explorer would not have.
What It Means for ASX Silver Investors
The drilling arrives against persistent tightness in the physical silver market, with the metal recently trading near $64 an ounce. The Silver Institute expects 2026 to mark a sixth straight year of global deficit, a backdrop encouraging smaller ASX explorers to hunt ounces in known, high-grade camps rather than greenfields ground. Jacknife is still early stage and assay results are not yet in hand, so normal exploration risk applies, but its production history and lack of modern drilling make it one worth watching this quarter.
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