Endurance Gold’s Reliance PEA: zone extensions and UG potential for mine planners
Reviewed by Tom Sullivan

First reported on MINING.com
30 Second Briefing
Endurance Gold has extended the Imperial and Lower Imperial zones at its Reliance project in British Columbia, intersecting gold-antimony mineralisation as it advances a PEA on an initial 19.6 million inferred tonnes at 2.3 g/t gold (1.45 million oz). Key intercepts include DDH26-140 with 5.2 metres at 5.89 g/t gold and 0.19% Sb from 405 metres, and DDH26-137 with 16.2 metres at 2.24 g/t gold and 0.06% Sb from 526 metres, extending the zones 50–55 metres along strike. Over 10,200 metres of drilling in 25 holes across the Eagle, Crown and Imperial zones is defining multiple narrow, high-grade footwall structures along the Royal Shear, supporting potential underground resource growth.
Technical Brief
- DDH26-130A tested an under-drilled Royal Shear contact, returning 11.1 m at 2.97 g/t Au, 0.03% Sb from 432 m.
- Within DDH26-130A, an 8 m sub-interval averaged 2.42 g/t Au with elevated 0.31% Sb.
- DDH26-134A intersected 10.9 m at 3.96 g/t Au and 1.92% Sb from 304.5 m depth.
- Over 10,200 m of drilling in 25 holes has now been completed across Eagle, Crown and Imperial.
- Multiple narrow, high-grade footwall structures are being delineated adjacent to the Royal Shear, beyond earlier mineralised envelopes.
- Antimony mineralisation is consistently reported in new holes but remains excluded from the current gold-only inferred resource.
- Reliance is a brownfield site with historic Minto mine production of ~17,500 oz Au between 1934–1940.
- Project lies ~180 km northeast of Vancouver, implying road-accessible logistics for future underground development scenarios.
Our Take
Endurance Gold’s Reliance drilling in 2026, which includes step-outs such as 14.7 metres at 7.67 g/t gold and 0.13% antimony, suggests that the current 1.45-million-oz inferred gold resource at the Reliance brownfield project may still be conservative if these newer high-grade hits can be brought into the model.
With pit-constrained inferred tonnes at Reliance grading 2.23 g/t gold in British Columbia, the project sits at the higher-grade end of open-pittable gold entries in our Mining–Projects coverage, which could give it resilience against cost inflation if strip ratios and geotechnical conditions along the Royal Shear fault contact remain manageable.
The consistent presence of antimony in intervals at Eagle, Crown and Imperial zones positions Reliance as one of the relatively few gold–antimony stories in our database, which may become strategically relevant if Canadian or US critical minerals policy begins to favour domestic antimony-bearing deposits alongside gold.
Prepared by collating external sources, AI-assisted tools, and Geomechanics.io’s proprietary mining database, then reviewed for technical accuracy & edited by our geotechnical team.
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