Summary

Mine Type	Open Pit
Study Completed	Feasibility
Stage	Construction
Commodities	REE
Mining Method	Truck & Shovel / Loader
Project Timeline	...
Mine Life	...
Snapshot	Longonjo is a near-surface, high-grade mine supported by the Lobito Corridor’s world-class rail, hydroelectric power, and port infrastructure. Longonjo main construction commenced. Pensana currently has oversubscribed interest in offtake for the Phase 1 production and has received significant interest towards the proposed expansion to 40,000 t of MREC per annum. Pensana has continued to evaluate downstream opportunities to convert MREC feedstock from Longonjo to oxide, including metallisation and magnet manufacturing. Execution is supported by the US International Development Finance Corporation (DFC) grant and strategic partnerships to develop a Western-facing magnet supply chain. The initial feasibility studies completed to support oxide separation were aimed at the establishment of the Saltend refinery in the UK, although opportunities exist to establish a separation facility elsewhere, independently or through partnerships.

Deposit type

• Carbonatite hosted

Summary:

The Longonjo carbonatite is located within the north-east-orientated Lucapa Lineament of central Angola. Longonjo is a Cretaceous-age, sub-circular carbonatite diatreme, approximately 2.5km in diameter, which is intruded into Neoproterozoic granitic rocks. REEs, including NdPr mineralisation, are widespread across the carbonatite.

A horseshoe-shaped ring of hills surrounds much of the carbonatite and consists of more resistant potassic and sodic-altered granitic country rocks (fenite) and carbonatite ring dykes. High-level explosion breccias of mixed carbonatite and fenite clasts form the bulk of the carbonatite body, with sub-vertical ring dykes and carbonate plugs cutting and intruding the northern and southern margins of the carbonatite and surrounding fenite.

The fenite ring surrounding the carbonatite proper also contains additional fenite bands and fenite-dominated breccias.

Disseminated rare earth mineralisation is particularly enriched in the near surface weathered zone, which forms a sub horizontal residual blanket of soft iron rich material. Mineralisation also occurs in fresh rock beneath the weathered zone horizon.

Natural weathering processes have removed the original carbonate minerals in the weathered zone through dissolution, thereby enriching the NdPr rare earth minerals left behind. The weathered zone and associated veneer of locally transported soil and gravel typically ranges between 20 to 30 metres in thickness but reaches 70 metres in some areas.

Rare earth minerals within the weathered zone are predominantly monazite with some bastnaesite occurring in peripheral areas.

Mining Methods

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Comminution

Crushers and Mills

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Processing

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Commodity Production

Operational metrics

Metrics
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Personnel

Job Title	Name	Profile	Ref. Date
.......................	.......................		Nov 10, 2025
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Employees	Year
......	2025