Summary

Mine Type	Open Pit
Study Completed	Feasibility
Study in Progress	Feasibility Update
Stage	Construction
Commodities	Iron Ore
Mining Method	Truck & Shovel / Loader
Project Timeline	...
Mine Life	...
Snapshot	The Simandou iron ore project in Guinea c largest known undeveloped high-grade low-impurity iron ore deposits. The Simandou site is divided into four mining blocks, broken up into two projects: Simandou North (blocks 1 and 2) and Simandou South (blocks 3 and 4). Winning Consortium Simandou (WCS) is the owner of Simandou Blocks 1 and 2. Rio Tinto and its Simfer joint venture (JV) partners have determined key agreements with the Republic of Guinea and WCS on the trans-Guinean infrastructure for the Simandou project. The Simandou South (Blocks 3 and 4) consists of Pic de Fon and Ouéléba iron deposits. The feasibility study for Ouéléba is completed. Pic de Fon deposit will undergo an additional feasibility study. During 2024, Significant progress has been made on the SimFer mine, rail spur and port, enabling the completion of major project construction interim milestones agreed with the Guinean Government. The project is advancing at a rapid pace and on schedule.

Deposit type

• Banded iron formation

Summary:

The Mineral Resources are based on the Pic de Fon and Ouéléba deposits which are typical of supergeneenriched itabirite hosted iron deposits. The deposits are part of a supracrustal belt with the banded iron formation (BIF) proto-ore likely deposited in a shallow marine setting within a forearc basin.

The deposits are located in the Simandou Range on a prominent ridge. The Simandou Range is the result of multi-phase ductile deformation represented by tight synformal fold keels and sheared antiformal structures. The ridge consists of a formation of itabirites (metamorphosed BIF) and phyllites within the Simandou Group overlying basement gneiss and amphibolite. The itabirites and phyllites have been deeply weathered and identifying stratigraphy is difficult, with the only discernible contact being that between the itabirites and phyllites.

The following domains have been interpreted for the itabirites: laterite, carapace, transitional mineralisation, friable hematite goethite mineralisation, friable enriched itabirite, friable poor itabirite and compact poor itabirite.

Phyllite domains have been interpreted for very weak phyllite, soil strength phyllite, weak phyllite, compact pyritic phyllite, weak quartzite and compact quartzite.

Laterite and carapace are sub-horizontal with the laterite overlying all other lithologies and the carapace overlying the mineralisation and enriched itabirite lithologies.

The itabirites and phyllites are interpreted to be folded with the axial planes of the fold hinges dipping moderately to steeply towards the west.

The high-grade mineralisation at Pic de Fon and Ouéléba is located on the top of the ridge, and typically consists of hematite-martite and hematite-goethite mineralisation respectively. Drilling has confirmed that the high-grade mineralisation extends to over 400 m from the surface.

The high-grade mineralisation at both deposits transitions downwards into a partially enriched, generally friable, itabirites and then into unenriched itabirites which also transition from friable to compact with increasing depth away from the mineralisation front.

A surface covering of weathered mineralisation typically up to 20 m to 30 m in depth is found over the high-grade mineralisation at Pic de Fon. At Ouéléba much deeper pervasive weathering is observed with a weathered carapace (goethite, clay and limonite rich) and a transitional weathering/mineralisation zone are observed over the high-grade mineralisation. These zones are typically between 30 m to 100 m thick but can be over 300 m thick in some locations.

The Ouéléba deposit strikes approximately north-northeast/south-southwest with an along strike extent of 9.8 km, with a width of approximately 0.8 km at the widest. The resource mineralisation extends from surface to a vertical depth of approximately 600 m.

The Pic de Fon deposit strikes approximately north-northwest/south-southeast with an along strike extent of 7.5 km, with a width of approximately 1 km at the widest extent (approximately 0.5 km on average). The resource mineralisation extends from surface to a vertical depth of approximately 500 m.

Supergene-enriched itabirite hosted iron ore deposits. The deposits are part of a supracrustal belt with the banded iron formation proto-ore likely deposited in a shallow marine setting within a forearc basin. The age of deposition is considered to be between 2.7Ga and 2.2Ga.

Mining Methods

- subscription is required.

Comminution

Crushers and Mills

Processing

- subscription is required.

Commodity Production

Operational metrics

Metrics
Annual ore mining rate	....

Personnel

Job Title	Name	Profile	Ref. Date
.......................	.......................		Mar 28, 2025
.......................	.......................		Mar 28, 2025
.......................	.......................		May 21, 2024
.......................	.......................		Mar 28, 2025
.......................	.......................		Mar 28, 2025
.......................	.......................		Mar 28, 2025
.......................	.......................		Mar 28, 2025
.......................	.......................		Mar 28, 2025
.......................	.......................		Mar 28, 2025
.......................	.......................		Mar 28, 2025