Orosur Mining (AIM:OMI), the TSXV and AIM-listed gold explorer focused on the Anzá Project in Colombia, released results from six drill holes confirming an extensive, flat lying body of near-surface mineralisation at its Pepas West prospect.
The best result, PEP103, returned 10.2 metres at 5.77 grams per tonne gold from surface, while PEP104 delivered 19.8 metres at 1.77 grams per tonne gold.
Pepas West sits roughly 100 metres west of the main Pepas deposit, for which Orosur published a maiden mineral resource estimate on 10 February.
The company said recent drilling reveals a more complex picture than initially thought, with high-grade surficial mineralisation appearing to be a mix of in situ and heavily weathered material potentially remobilised downslope from Pepas.
Mineralisation grades between 1 and 5 grams per tonne gold across a flat lying zone roughly 10 metres thick, often hidden beneath a thin layer of barren transported soil.
Given the free-digging, oxide nature of the mineralisation, Orosur plans to trial a smaller auger rig in the coming weeks to more rapidly define the zone's volume and grade, while retaining its diamond rig for deeper targets roughly Pepas West.
"The grade is there which in the end is all that matters", said chief executive Brad George, adding that "with Pepas entering feasibility and permitting, additional cheap ounces are worth their weight in gold".
News Intelligence what this means for the company
Orosur's six new drill holes at Pepas West confirm a flat-lying, near-surface gold zone with grades between 1–5 g/t Au across ~10 m thickness, including a best result of 10.2 m at 5.77 g/t Au from surface. The company plans to deploy a faster auger rig to accelerate resource definition of this shallow, oxide-friendly mineralisation while the main Pepas deposit enters feasibility and permitting—a low-cost way to add ounces to the project inventory. On 10 February, Orosur published a maiden mineral resource estimate for the main Pepas deposit, and this extension sits only 100 m away, suggesting the district-scale potential is larger than the initial resource alone.
The discovery of a separate, easily mined shallow zone adjacent to Pepas—with free-digging oxide mineralisation and grades in the 1–5 g/t range—materially expands the project's ore inventory at low exploration cost. This supports the CEO's claim that 'additional cheap ounces' enhance project economics as Pepas moves toward feasibility; however, the company's investment case still hinges on whether the combined Pepas + Pepas West resource can support a profitable mine at Colombian operating costs and permitting timelines.
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