Orosur Mining Inc Announces Pepas West Developing
Orosur’s Pepas West step-out drilling returned low-grade, narrow assays, casting doubt on northern growth potential as surface samples remain untested.
Orosur Mining Inc. reported five new diamond drill holes (PEP095–PEP099) at the Pepas West prospect, located approximately 100 meters west of the main Pepas deposit. These holes tested the northern extent of the recently discovered zone and returned mixed results, with generally lower-grade intercepts than prior hits at Pepas West. PEP096 was barren.
The best intercepts were PEP098, which returned 17.1 meters at 1.27 grams per tonne gold, and PEP099, which returned 3.95 meters at 1.94 grams per tonne gold. High-grade surface samples, with grades up to 79.6 grams per tonne gold, were discovered approximately 200 meters southwest of the inferred resource, suggesting a possible strike extension. Drilling beneath those samples has begun.
Orosur Mining Inc. (OMI) reported that Pepas West serves as a satellite to the main 219 koz Pepas resource, with prior discovery holes generating modest market interest. New holes testing the northern extension returned grades substantially below the discovery and did not identify thick mineralization. A blank hole adds risk to the area.
Consequently, the thesis that Pepas West could evolve into a meaningful resource addition is weakened. Undrilled surface samples remain only a target and do not offset the weak drilling results. For a very small explorer, this is a minor negative, but the overall investment case still rests on the main Pepas deposit moving to feasibility. The news is not transformational and is slightly negative relative to prior Pepas West results.
Orosur Mining Inc. (OMI) is a pre-revenue gold explorer focused on its 100%-owned Anzá Project, a 330-km² property in Colombia’s Mid-Cauca belt. The project’s flagship Pepas deposit hosts a maiden indicated resource of 1.14 Mt @ 5.46 g/t Au (201 koz), plus a small inferred component, defined by shallow drilling to approximately 100 m depth and amenable to open-pit mining. Additional prospects include APTA, which has been drill-tested but holds no resource yet, and El Cedro, a porphyry target identified by soil geochemistry.
In Argentina, the company holds a 51% interest in the El Pantano epithermal gold project, which is moving to 100% ownership, following the completion of a reconnaissance drill program. The company has exited its Nigerian lithium project. As of Q3-2026, cash stands at US$13.7 M, but ongoing losses and a going-concern warning highlight dependence on further equity financing.