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Tanzania

Mahenge Project

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Summary

Mine TypeOpen Pit
Study CompletedFeasibility
StagePermitting
Commodities
  • Graphite
Mining Method
  • Truck & Shovel / Loader
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Mine Life... Lock
SnapshotMahenge has one of the largest graphite Resources in the world and the 2nd largest graphite Reserve.

Since the default notice was lifted on 12 May 2025, Black Rock Mining has met with the Mining Commission to discuss next steps and has submitted a revised development schedule. The Company continues to believe that the Government of Tanzania remains committed to encouraging investment in the mining sector of Tanzania and, subject to funding, the Company remains committed to developing the Mahenge Graphite Project as soon as possible.

As of 2025, key Government Agreements in place and all key permits in hand.

Black Rock Mining continues to evaluate all options raise further funds to meet its financial obligations and progress the Mahenge Graphite Project to a Final Investment Decision.

First production expected to be 24 months from Final Investment Decision.

Owners

SourceSource
CompanyInterestOwnership
Government of Tanzania 16 % Indirect
Black Rock Mining Ltd. 84 % Indirect
Black Rock Mining Limited has an 84% interest in the Mahenge Graphite Project through its subsidiary, Faru Graphite Corporation.

In December 2021, Black Rock signed a Framework Agreement with the Government of Tanzania confirming a 16% Free Carried Interest shareholding, agreed to consolidate its Mining Licenses into a Special Mining Licence (SML). The SML for Mahenge was issued in September 2022.

Contractors

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Deposit type

  • Metamorphic

Summary:

The Project is located within the rocks of the Proterozoic Mozambique Orogenic Belt that extends throughout eastern Africa. It consists of high-grade mid-crustal rocks with a Neoproterozoic metamorphic overprint. The Mozambique Belt is divided into the Western Granulite and the Eastern Granulite. The two granulites are separated by flat-lying thrust zones and younger sedimentary basins of the Karoo.

The belt has undergone granulite phase metamorphism that has been subsequently retrograded to upper amphibolite facies. Structurally, the Mahenge region has undergone intense deformation forming a tight poly-phase sequence of marble, mafic and felsic gneisses and graphitic schists as part of the km-scale Mahenge Synform. The Mineral Resources are located on the western flank of the synform where the bedding and foliation dip between 60° and 80° towards the east. The units typically strike to the north and rotate to the northeast as they wrap around the fold nose.

The deposit type is described as schist hosted flaky graphite. The mineralisation is hosted within upper amphibolite facies gneiss of the Mozambique Mobile Belt.

Over 95% of the exposures within the tenement comprise 3 main rock types that include alternating sequences of:
• Graphitic schist – feldspar and quartz rich varieties.
• Marble.
• Biotite and hornblende granulites.
• Less common rock types include quartzite.

Dimensions
The modelled mineralized zone for Ulanzi has dimensions of 2,500m (surface trace striking 020°) with four zones averaging in thickness of between 50-60m and ranging between 400m and 760m RL (AMSL).

The modelled mineralized zone for Epanko has dimensions of 1,025m (surface trace striking 000°) averaging in thickness of between 55-80m and ranging between 640m and 1,025m RL (AMSL).

The modelled mineralized zone for Cascade has dimensions of 900m (surface trace striking 020°) averaging in thickness 70m and ranging between 560m and 900m RL (AMSL).

Reserves

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Mining Methods

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Required Heavy Mobile Equipment

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Comminution

Crushers and Mills

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Processing

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Commodity Production

CommodityUnitsAvg. AnnualLOM
Graphite kt 3477,400
All production numbers are expressed as concentrate.

Operational metrics

Metrics
Annual processing capacity  ....  Subscribe
Stripping ratio  ....  Subscribe
Ore tonnes mined, LOM  ....  Subscribe
Tonnes processed, LOM  ....  Subscribe
* According to 2022 study.

Production Costs

CommodityUnitsAverage
All-in sustaining costs (AISC) Graphite USD  ....  Subscribe
C1 cash costs Graphite USD  ....  Subscribe
Assumed price Graphite USD  ....  Subscribe
* According to 2022 study / presentation.

Project Costs

MetricsUnitsLOM Total
Initial CapEx $M USD  ......  Subscribe
Net revenue (LOM) $M USD  ......  Subscribe
EBITDA (LOM) $M USD  ......  Subscribe
After-tax NPV @ 10% $M USD  ......  Subscribe
After-tax IRR, %  ......  Subscribe
After-tax payback period, years  ......  Subscribe

Personnel

Mine Management

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Aug 16, 2025
....................... Subscription required ....................... Subscription required Subscription required Aug 16, 2025
....................... Subscription required ....................... Subscription required Subscription required Aug 16, 2025

Workforce

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