An underground-style diamond drill rig works against a hard-rock face in a British Columbia copper exploration setting.
By Salini Krishnan
Published in Hard News
Vizsla Copper Corp. reported a 48.5-metre copper intersection grading 3.32% copper at the Deerhorn deposit in central British Columbia, highlighting a high-grade zone that the company says remains open in multiple directions.
The result came from drill hole DH26-136, which returned the 48.5-metre interval from 320.5 metres to 369.0 metres downhole. The interval sits within a broader 107.7-metre section grading 2.01% copper, itself contained in 266.0 metres grading 0.97% copper from 306 metres downhole.
The release quickly became a focus of mining news coverage. Kalkine reported that Vizsla shares rose 13.53% following the announcement. Other market reports recorded gains of approximately 13% to 14%, with Resource World reporting a 14.3% increase to C$1.52 and Canadian Mining Journal reporting a 13% rise to about C$1.50. Differences reflect the timing and data source used by each market report.
The market reaction underscores investor sensitivity to high-grade copper discoveries, particularly in jurisdictions that could contribute to North American and broader Western supply chains.
DH26-136 identifies a high-grade copper core
Vizsla described the Deerhorn result as the longest high-grade copper intersection drilled to date at its Woodjam Project. The company is advancing Woodjam alongside its Poplar and Palmer projects in western North America.
The lower mineralized section of DH26-136 included:
- 266.0 metres at 0.97% copper, 0.06 grams per tonne gold and 4.29 g/t silver
- Including 107.7 metres at 2.01% copper, 0.13 g/t gold and 8.61 g/t silver
- Including 48.5 metres at 3.32% copper, 0.23 g/t gold and 16.59 g/t silver
- Within the high-grade interval, 21.5 metres graded 5.63% copper, 0.40 g/t gold and 22.56 g/t silver
The hole also cut a shallower mineralized zone of 129.9 metres grading 0.30% copper, 0.21 g/t gold and 0.94 g/t silver from 70.1 metres downhole. That interval included 50 metres grading 0.46% copper, 0.40 g/t gold and 1.43 g/t silver.
Split drill core from a British Columbia copper exploration program with quartz-chalcopyrite stockwork and breccia textures.
The company said the lower zone comprises quartz-chalcopyrite veins and stockwork that transition into semi-massive chalcopyrite and quartz-chalcopyrite breccias. The mineralization is associated with altered monzonite and structural zones within the broader porphyry-related copper-gold system.
The grades were reported as downhole core lengths. Vizsla has not established the true thickness of the mineralization, an important qualification when assessing the potential geometry of an exploration intercept.
Deerhorn sits within Woodjam’s central British Columbia portfolio
Deerhorn forms part of Vizsla Copper’s Woodjam Project, located in the Quesnel terrane of central British Columbia, approximately 50 kilometres east of Williams Lake. The district hosts several established and historical porphyry copper systems, including Imperial Metals’ Mount Polley mine and New Gold’s New Afton operation.
For clarity, Vizsla’s Aug. 26 disclosure identifies Deerhorn as a deposit at Woodjam. It does not describe Deerhorn as part of a separate “Coppercreek” project area. That distinction matters because Copper Creek is also used in connection with unrelated copper assets elsewhere. The company’s own project materials place Deerhorn within the Woodjam portfolio.
Woodjam covers approximately 900 square kilometres and contains the Deerhorn, Takom, Megaton and other exploration targets. The project’s geological setting gives Vizsla exposure to a well-established copper belt with existing regional infrastructure and a history of porphyry exploration.
Deerhorn also carries a historical estimate of 32.8 million tonnes grading 0.22% copper and 0.49 g/t gold. Vizsla cautions that this is a historical estimate and is not treating it as a current mineral resource or mineral reserve. A qualified person has not completed sufficient work to classify it under current National Instrument 43-101 standards.
That limitation is central to interpreting the new result. The drill hole may improve the geological understanding of the deposit, but it does not by itself establish a current resource, mine plan or economic development case.
Why the copper grade matters
Porphyry copper deposits are commonly large but comparatively low grade. A sustained copper interval above 3% therefore stands out, particularly when it occurs within a longer mineralized envelope.
The Deerhorn result also has characteristics that may be relevant to future underground-style assessment. The strongest copper zone begins more than 300 metres downhole, and Vizsla said the drilling extended mineralization approximately 100 metres below the area covered by the historical estimate.
That does not mean Deerhorn is currently an underground mine project. No mining method has been selected, and the company has not published an economic study based on the new intersection. However, deeper, structurally controlled high-grade zones can become important in mine-planning scenarios if follow-up drilling confirms continuity, orientation, metallurgy and sufficient volume.
The result also arrives amid continued attention on copper supply. Grid expansion, electrification, renewable power infrastructure, data centres and industrial investment are increasing long-term demand expectations, while new mine development remains constrained by permitting, capital intensity, construction timelines and declining grades at some mature operations.
Skillings’ coverage of the copper market outlook examines how supply disruptions and energy-transition demand are affecting the sector. The Deerhorn result is relevant to that discussion because it points to the potential value of high-grade discoveries in established mining jurisdictions, even before a project reaches the development stage.
Deerhorn results compared with recent copper and gold-copper hits
The Deerhorn intercept is best compared with other results using caution because drill orientation, geological setting, metal mix, cut-off grades and equivalent-grade assumptions differ.
| Project and hole | Reported length | Reported grade | Main significance |
|---|---|---|---|
| Deerhorn DH26-136 | 48.5 m | 3.32% Cu | High-grade copper zone within 266.0 m at 0.97% Cu |
| Deerhorn DH26-136 | 107.7 m | 2.01% Cu | Broader high-grade copper interval |
| Deerhorn DH26-136 | 266.0 m | 0.97% Cu | Extended mineralized envelope below historical estimate |
| Troilus Z87 | 4.8 m | 8.84 g/t AuEq | High-grade gold-equivalent step-out beyond resource pit shell |
| Deerhorn DH26-136, shallow zone | 129.9 m | 0.30% Cu | Near-surface copper-gold mineralization |
Troilus Mining’s Z87 result in Quebec returned 8.84 g/t gold equivalent over 4.8 metres, including 1.03% copper, in a step-out hole beyond the existing resource pit shell. The Troilus result is a gold-equivalent intercept, while Deerhorn’s headline interval is reported primarily as copper. The two results should therefore be viewed as indicators of exploration momentum rather than direct grade equivalents.
The linkable data point from Deerhorn is the combination of 48.5 metres at 3.32% copper within 266.0 metres at 0.97% copper. That relationship: high grade within a broad mineralized envelope: will be important for future geological modelling and any eventual resource work.
Chalcopyrite-rich veins and breccia textures are visible in copper-bearing exploration core.
Follow-up drilling and pending assays
Vizsla completed an 11-hole, 6,055-metre summer program at Woodjam. Three holes targeted Deerhorn: DH26-134, DH26-136 and DH26-137.
Results from DH26-134 and DH26-137 remained pending in the company’s disclosure, along with assays from eight additional holes at the Three Firs and Great Plains targets. The company plans to relog historical core from the eastern portion of Deerhorn after the pending assays are received.
That work is intended to support a new geological and structural model of the emerging high-grade copper zone. Follow-up drilling will then test its potential continuity and extensions.
The company said the high-grade zone remains open in multiple directions. The next steps will determine whether the DH26-136 result represents a localized high-grade feature or part of a larger, coherent copper system.
Vizsla is also conducting drilling at its other projects. At Poplar in British Columbia, the company is advancing the Thira porphyry discovery, while drilling continues at the Palmer VMS project in southeast Alaska. The broader portfolio gives Vizsla multiple opportunities to generate exploration results, but it also means capital and technical resources are distributed across several assets.
Exploration infrastructure and forest access roads support drilling across central British Columbia’s copper belt.
What the result does: and does not: show
The Deerhorn intercept strengthens the geological case for additional drilling at Woodjam and provides a high-grade copper data point that stands out against the project’s historical average grades.
It does not yet demonstrate economic viability. Further work is required to establish true thickness, continuity, geological controls, metallurgical recovery, resource classification and potential development scenarios. The historical estimate also requires verification or replacement with a current mineral resource estimate.
For investors and mining professionals tracking copper exploration, the immediate indicators to watch are the pending assays, the company’s updated geological model and the spacing and orientation of follow-up holes. Those results will show whether Vizsla can convert a strong drill intersection into a broader discovery narrative.
The shares’ 13.53% move, as reported by Kalkine, indicates that the market viewed the result as material. Sustaining that interest will depend on whether subsequent drilling confirms the extent and consistency of the high-grade zone.
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Vizsla Copper reported 48.5 metres grading 3.32% copper within a broader 266-metre interval at 0.97% copper at Deerhorn in British Columbia. The result extended mineralization below the historical estimate and pushed shares about 13.5% higher, highlighting investor interest in high-grade copper discoveries in established jurisdictions.