Aris Mining Connects Decline to Marmato Underground in Colombia

Why It Matters

The connection removes a critical logistical bottleneck, accelerating Marmato’s path to commercial production and bolstering Aris Mining’s growth trajectory in the high‑grade Latin American gold sector.

Key Takeaways

• Los Indios cross‑cut links new surface decline to Marmato underground
• 5,000‑ton‑per‑day CIP plant under construction at surface
• First gold pour expected in Q4 2026, on schedule
• Expansion aims for ~500,000 ounces annual output
• Project supports Aris Mining’s growth strategy in Latin America

Pulse Analysis

Aris Mining’s Marmato project reflects a broader shift toward large‑scale underground gold operations in South America, where high‑grade deposits are increasingly favored over open‑pit mining. Colombia’s stable regulatory environment and supportive mining policies have attracted several junior explorers, but few have progressed to the complex engineering stage that Marmato now demonstrates. By completing the Los Indios cross‑cut, Aris not only validates its underground development expertise but also positions the mine to integrate a modern 5,000‑ton‑per‑day CIP plant, a capacity that rivals many senior producers in the region.

The newly established decline‑to‑underground link streamlines material flow, allowing ore to be hauled directly from the surface processing hub to the existing network of tunnels. This continuity reduces haulage costs, shortens cycle times, and improves worker safety by limiting surface‑to‑subsurface transfers. With the first gold pour slated for Q4 2026, the project’s timeline aligns with the company’s broader ramp‑up plan, which targets a combined 500,000 ounces per year from Marmato and the adjacent Segovia mine. Such output would place Aris among the top mid‑tier gold producers, enhancing its reserve base and cash‑flow profile.

For investors, the milestone signals de‑risking of a capital‑intensive venture and underscores Aris’s capacity to deliver on schedule—a critical factor in a sector where delays can erode market confidence. The anticipated production scale could attract institutional capital seeking exposure to high‑margin, low‑cost gold assets, especially as global gold demand remains robust amid inflationary pressures. Moreover, Marmato’s underground model offers a template for future expansions in similar geological settings, potentially opening pathways for Aris to replicate this success across other Colombian or Andean projects.