Name of the Project
Kamoa-Kakula copper mine development project.

Location
The project is located in the Kolwezi district of Lualaba province, in the Democratic Republic of Congo (DRC).

Project Owner/s
The project is a joint venture (JV) between Ivanhoe Mines, Zijin Mining Group Co, the DRC government and Crystal River Global.

Project Description
A prefeasibility study (PFS) on the Kakula copper mine and the expanded preliminary economic assessment (PEA) for the overall development of the Kamoa and Kakula copper discoveries at the Kamoa-Kakula project have reinforced that Kamoa-Kakula is one of world’s best undeveloped copper discoveries.

The total Kamoa-Kakula deposit hosts indicated resources of 1.39-billion tonnes grading 2.64% copper and inferred resources of 316-million grading 1.76% copper.

Kakula, which has mineral reserves of 119.7-million tonnes, benefits from an ultra­high, average feed grade of 6.4% copper over the first ten years of operations, and 5.5% copper on average over a 25-year mine life.

The Kakula 2019 PFS proposes the development of an initial six-million-tonne-a-year mine at the Kakula deposit, in the southerly portion of the Kamoa-Kakula project’s discovery area. The study envisages an average production of 291 000 t/y of copper for the first ten years of operation and peak copper production of 360 000 t in Year 4.

Mining at the Kakula deposit will be undertaken by drift-and-fill using paste backfill, and room-and-pillar methods. The method has been chosen to maximise the extraction of high-grade Kakula ore and is suitable for large-scale bulk mechanised mining.

Mine access to the Kakula deposit will be through twin declines on the north side, which have been completed, and a decline on the south side of the deposit. One of the north declines will serve as the primary mine access while the other will include the conveyor haulage system.

The south decline will provide additional ventilation, serve as a secondary operational ingress/egress and will facilitate critical early mine development.

The Kakula concentrator will be built in a phased approach, with two three-million-tonne-a-year modules as the mining operations ramp up to full production of six-million tonnes a year. The Kakula concentrator design incorporates a run-of-mine stockpile, followed by crushing and screening, high-pressure grinding rolls, ball milling, flotation, concentrate thickening and filtration.

The Kamoa-Kakula 2019 PEA presents the sequential development plan of the Kamoa-Kakula’s high-grade copper deposits.

Initial production is proposed to occur at six-million tonnes a year from the Kakula mine before increasing to 12-million tonnes a year, with mill feed from the Kansoko mine. A third six-million-tonne-a-year mine will then be developed at Kakula West, bringing total production to 18-million tonnes a year.

As resources at Kakula and Kansoko are mined, the PEA envisages that production will begin at several mines in the Kamoa North area to maintain the 18-million-tonne-a-year throughput over a 37-year mine life.

Each mining operation is expected to be a separate underground mine with a shared processing facility and surface infrastructure located at Kakula.

Included in this scenario is the construction of a direct-to-blister flash copper smelter – with a capacity of one-million tonnes of copper concentrate a year to be funded from in-house cash flows – at the Kakula plant site.

This would be completed in Year 5 of operations, achieving significant savings in treatment charges and transportation costs.

The 18-million-tonne-a-year scenario delivers average production of 472 000 t/y of copper over the life-of-mine with peak production of 740 000 t/y by Year 12.

Potential Job Creation
Not stated.

Net Present Value/Internal Rate of Return
The Kakula PFS estimates an after-tax net present value (NPV), at an 8% discount rate, of $5.4-billion and an internal rate of return (IRR) of 46.9%, with a project payback of 2.6 years.

The Kamoa-Kakula PEA estimates an after-tax NPV, at an 8% discount rate, of $10-billion and an IRR of 41%, with a payback of 2.9 years.

Capital Expenditure
The Kakula PFS estimates a peak project funding of $1.1-billion.

The Kamoa-Kakula three-phase sequential operation envisages a peak funding capital of $1.1-billion.

Planned Start/End Date
Not stated.

Latest Developments
Ivanhoe Mines has extended the strike length of the Kamoa-Kakula mining licence.

The company’s drilling has extended the strike length of the shallow, thick copper discovery at the Kamoa North Bonanza zone by 200 m to at least 550 m, with an implied strike length of at least 2.7 km and a width of up to 60 m across strike.

Additionally, new assays have returned copper grades of up to 13.8% over 15.5 m in the central discovery area.

The company has recently reported on drilling its best intercept ever on the entire mining licence, at Kamoa North returning grades of 18% copper over 18.9 m at a 2% cutoff grade.

The company now has six rigs operating at Kamoa North to extend the strike length further and fast-track a resource estimate.

Meanwhile, drilling on Ivanhoe’s wholly owned Western Foreland licences, which are north of the Kamoa-Kakula mining licence, has resulted in the discovery of the extension of the Kamoa Far North high-grade shallow copper corridor for at least 400 m.

Key Contracts and Suppliers
Amec Foster Wheeler E&C Services, DRA Global, KGHM Cuprum R&D Centre, OreWin, Stantec Consulting International and SRK Consulting (PFS and PEA).

On Budget and on Time?
Not stated.

Contact Details for Project Information
Ivanhoe Mines, tel +1604 688 6630 (North America)/+27 11088 4300 (South Africa) or email info@ivanhoemines.com.