Soto Norte

Location
Santander, Colombia
Mine Type
Underground
Status
PFS Completed
Ownership
100%

One of the Most Attractive Gold Projects in the Americas

Soto Norte is a high-grade, low cost, long-life underground project located in the historic California – Vetas mining district. In September 2025, Aris Mining published a Prefeasibility Study (PFS) outlining robust economics, low operating costs, and leading environmental and social design features.

Preparation of the Environmental and Social Impact Assessment (ESIA) is complete, and community engagement is underway as the Project advances through the environmental licensing process.

Soto Norte is designed as an owner-mined operation, creating direct employment opportunities. Through community engagement, Aris Mining has also identified the environmental impacts of unregulated mineral processing as a key local concern. In response, a portion of the Project’s processing capacity will be dedicated to material from local miners, providing access to modern processing infrastructure and responsible tailings and water management.

Reserves & Resources Technical Report

Prefeasibility Study Results

4.6 Moz

P&P Gold Reserves at 7.0 g/t

7.0 Moz

M&I Gold Resources at 5.6 g/t

Mill Throughput

3,500tpd
Including 750 tpd for local community miners

Mine Life{{1}}

22 years
(mineral reserves)

Life of Mine Gold Production

4.3 Moz

Average Annual Gold Production (Years 2 - 10)

263 koz Au

By-products

Ag, Cu

Key Financial Metrics{{1,2}}

$534/oz

AISC (LOM)

$410M

Average Annual EBITDA (Years 1 to 21)

$625M

Initial Construction Capital

$2.7B

After-tax NPV5%

35.4%

After-tax IRR

  1. At an owner-mining rate of 2,750 tpd.
  2. Assuming a gold price of $2,600/oz (base case)

Our Approach to Responsible Development

We’re focused on generating substantial long‑term value for shareholders, communities, and government partners, while maintaining the highest standards of safety, water protection, and environmental management.

Community Processing Capacity

A processing plant with 20% excess capacity (750 tpd) to facilitate local, small scale miner formalization

Minimal Water Use and Surface Tailings Storage

Recycling system allows 96.5% water reuse. Almost half of the produced tailings to be stored underground

Local Employment

Peak construction will create about 2,300 jobs, with longterm operations sustaining about 675 direct employees

No Cyanide or Mercury

Processing facility will not use cyanide or mercury

Community Engagement Model

Structured engagement model empowering communities to identify priorities and propose initiatives

Environmentally Sound Operations

Use of rope conveyor to reduce truck traffic, dust, and spillage

Water Protection and Improvement

Designed to protect local watercourses

Filtered Tailings Facility

Best practice design according to globally recognized standards

Contract Mining Partners

Soto Norte has been designed to incorporate the same Contract Mining Partner (CMP) model that has been successfully implemented at Segovia, creating a formal and responsible pathway for local miners to participate in the project’s value chain. 

The planned processing facility will have a capacity of 3,500 tonnes per day, including 750 tonnes per day, or more than 20% of total capacity, dedicated to processing material purchased from local community miners.

This dedicated capacity is intended to provide a safe and regulated alternative to traditional processing methods, eliminate the use of mercury, and ensure that tailings and water are managed in accordance with modern environmental standards. The model also supports local economic participation while creating shared value for surrounding communities and the project.

Learn More About Our Contract Mining Partners

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