Olympio Metals has started a roughly 1,500-metre maiden diamond drilling program at its Jacknife silver project in Idaho, targeting mineralisation linked to more than 3.2 million ounces of historical silver production. The campaign is significant, but the company must still verify old data before it can establish a JORC-compliant resource.
- Approximately 1,500 metres of maiden diamond drilling underway
- Targets the historic Conjecture Mine and nearby shear-zone extensions
- Jacknife has recorded 3.25 million ounces of historical silver production
- Project includes 335 acres of patented mining claims
- Historical foreign estimate remains non-JORC and requires modern verification
Jacknife Drilling Moves from History to Evidence
Olympio Metals Limited (ASX:OLY) has begun diamond drilling at the Jacknife Project in Idaho, opening the first modern exploration campaign across the consolidated claims. The approximately 1,500-metre program will test the historic Conjecture Mine, possible extensions of the Conjecture Shear Zone and other priority targets along the Conjecture and Weber shear zones.
The attraction is plain enough: records compiled by Olympio show six historic mines produced a combined 3,247,794 ounces of silver, alongside smaller quantities of gold, copper, lead and zinc. The Conjecture Mine alone accounted for more than 2 million ounces in production between 1956 and 1964, at a recorded average grade of 22 ounces of silver per tonne. Those figures describe past mining, not a current mineral resource, but they give the drilling a more substantial starting point than an untested surface anomaly.
1,500 Metres Targets Continuity and Strike
Initial holes will focus on the area between historical underground drives to test whether mineralisation continues vertically through the Conjecture Mine. Olympio also plans to investigate a roughly 520-metre western strike extension that, if mineralisation is confirmed, could extend the interpreted Conjecture Shear Zone to about 1 kilometre of strike.
Scout Discoveries Corp, a private US exploration company, is providing the in-country technical and operational support, with its drill rig now mobilised at site. The program is being conducted across a project covering 3,940 acres, including 335 acres of patented mining claims. The company says the patented ground has allowed drilling to advance rapidly, while exploration on the remaining unpatented claims generally requires regulatory permitting.
Historical Estimate Still Falls Outside JORC
The main qualification is the quality and status of the historical information. Olympio has referenced a foreign estimate for the Conjecture deposit based on 1975 and 1981 reports, but it is not reported under the JORC Code 2012. The company says the estimate should be treated only as a guide to the existence of mineralisation, and that further drilling is required before it can seek to define a JORC-compliant mineral resource.
That caveat matters because many historical sampling, drilling and assay records have not been preserved. The announcement says the old data cannot currently be independently verified, while no historical core or samples appear to be available. New drilling, together with modern sampling and verification work, is therefore intended to test not only the presence of silver but also the continuity, widths and grades implied by the historic mine records.
Critical Minerals Theme Adds Strategic Interest
Olympio is also positioning Jacknife within the US critical-minerals push, noting that silver and antimony appear on the 2025 US Geological Survey critical minerals list and linking that designation to a US$12 billion strategic mineral stockpile initiative. The project’s geology includes silver-bearing tetrahedrite and native silver, with galena, sphalerite, chalcopyrite and minor stibnite also recorded historically.
No new assay results or economic assessment accompanied the drilling commencement. The next meaningful test will be whether the modern holes reproduce the historical picture in a form that can support a compliant resource estimate, rather than simply confirming that old workings once contained high-grade veins.
Bottom Line?
The drilling provides a near-term exploration catalyst, but Jacknife’s investment case still depends on modern assays converting historical production records into verifiable, JORC-compliant evidence.
Questions in the middle?
- Will drilling confirm vertical continuity between the historic Conjecture underground drives?
- Can the proposed western extension sustain mineralisation over anything close to the interpreted 520 metres?
- How closely will modern assays match the historic grades once sampling and data verification are complete?