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Highlights
• Drill hole FURN-DD-00284 returned 105 meters at 1.54% CuEq, including 63 meters at 1.84% CuEq
• Step-out drilling extended known mineralization down to 730 meters from surface
• Phase 2 drill campaign underway with minimum 17,000 meters planned

Ero Copper Corp. (TSX:ERO, NYSE:ERO) has completed the 28,000-meter Phase 1 drill program at its Furnas Copper-Gold Project, located in Brazil’s Carajás Mineral Province. The program yielded multiple mineralized intercepts, including a standout result of 105 meters grading 1.17 percent copper and 0.77 grams per tonne gold, equivalent to 1.54 percent copper equivalent (CuEq), in hole FURN-DD-00284. This included a 63-meter section at 1.84 percent CuEq.

About the company: Ero Copper is earning a 60 percent interest in the Furnas Project under a definitive agreement with Salobo Metais S.A., a subsidiary of Vale Base Metals. The project spans 2,400 hectares and lies within 15 kilometers of existing infrastructure. A National Instrument 43-101 mineral resource estimate effective June 30, 2024, outlined 35.2 million tonnes of indicated resources at 1.36 percent CuEq and 61.3 million tonnes of inferred resources at the same grade.

The Phase 1 program focused on confirming continuity of high-grade zones and extending known limits of mineralization through step-out drilling. Assay data received for roughly 10,000 meters confirmed down-dip extensions to as deep as 730 meters, compared to the 580-meter maximum depth used in the prior mineral resource estimate. Only one of the 66 drill holes failed to intersect mineralization.

Hole FURN-DD-00271, located about 70 meters down-dip from prior intercepts, returned 75 meters at 1.30 percent CuEq, including 15 meters at 3.06 percent CuEq. Additional intercepts include 27 meters at 3.71 percent CuEq in FURN-DD-00269 and 91 meters at 1.20 percent CuEq in FURN-DD-00293.

Phase 2 drilling has commenced with eight active rigs. This phase targets a minimum of 17,000 meters with a heavier emphasis on step-out drilling. The results from Phase 1 will support both an updated NI 43-101 mineral resource estimate and a preliminary economic assessment scheduled for completion in the first half of 2026.

Ero’s earn-in commitment includes sole funding of exploration, engineering, and development over a five-year period, and granting Vale Base Metals up to an 11.0 percent free carry on future construction capital. Further results from the ongoing program are pending.