Marmato
- Location
- Caldas, Colombia
- Mine Type
- Underground
- Ownership
- 100%
Scaling a Historic Gold Operation for the Future
Building Colombia’s Most Modern Gold Mining Operation
Marmato is Aris Mining’s second producing asset and is being transformed through the development of the Bulk Mining Zone and construction of a new 5,000 tpd carbon-in-pulp (CIP) processing plant. First gold from Marmato’s new CIP plant is expected in Q4 2026. Once Bulk Mining Zone and CIP plant reach steady-state, Marmato is expected to produce approximately 200,000 ounces per year.
3.2 Moz
P&P Gold Reserves at 3.2 g/t
6.0 Moz
M&I Gold Resources at 3.0 g/t
1,000 tpd
Flotation Plant Capacity
5,000 tpd
New CIP plant capacity
29 koz
2025 Gold Production
35 - 50 koz
2026 Gold Production Guidance
200 koz
Expected Annual Gold Production (Steady State)
Q4-26
First Gold Pour Expected from new CIP plant
First Gold On Track for Q4 2026
Mining in the Bulk Mining Zone is already underway and its mill feed is being processed through the existing 1,000 tpd flotation plant, while construction of our new CIP plant remains on schedule, with first gold expected in the fourth quarter of 2026 and ramp-up continuing through 2027.
Underground Development
- Los Indios crosscut completed on April 17, 2026, providing direct access from the Bulk Mining Zone to the new CIP plant, and enabling an additional access and ventilation pathway, more efficient ore and waste haulage between existing and new infrastructure, and initial production ramp-up.
- Construction of main pump station, explosives magazine and main workshop commenced in Q2 2026.
Surface Activities
- Earthworks along with key foundations for the mills, tailings thickener, leach and CIP tanks completed.
- Main civil, mechanical, and electrical works are advancing.
- SAG and ball mills are on site and mechanical installation is underway.
- The crusher area is moving into mechanical installation.
- Leach tanks and CIP circuit are progressing well.
- Tailings thickener mechanically assembled.
- Main substation installation is advancing according to schedule.
Equipment
- All long lead items for first gold ordered.
- Sandvik mining and development fleet starting to arrive in Q3 2026 to supplement the existing fleet.
Contract Mining Partners
At Marmato, Aris Mining is building on the successful Contract Mining Partner (CMP) model that has been operating at Segovia for many years, transitioning the Narrow Vein Mining Zone to CMPs.
Approximately 300 formalized miners across 4 CMPs currently work in the Narrow Vein Mining Zone, with access to technical support and comprehensive training programs. Mill feed produced by the mining partners is processed at Aris Mining’s flotation plant.
Aris Mining is also working with government authorities and key community stakeholders to advance the formalization of artisanal and small-scale miners in the Cerro El Burro area, located above the Marmato Narrow Vein Zone and home to mining activity dating back centuries. Formalization is expected to improve safety, environmental practices and livelihoods, while providing a potential source of additional mill feed at Marmato.
Learn More About Our Contract Mining Partners
