Mining Intelligence and News
Sierra Leone

Sembehun Expansion Project

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Mine TypeOpen Pit
  • Rutile
  • Ilmenite
  • Zircon
Mining Method
  • Truck & Shovel / Loader
Mine Life... Lock
SnapshotSembehun is home to one of the world’s largest and highest grade natural rutile deposits. During the First Quarter of 2023, work continued on the DFS, which was released post quarter end.

The DFS reinforces the strategic value of the project, and has confirmed that once funded and constructed, the project will significantly extend the Company’s mine life, materially lower its cost structure, leverage existing infrastructure, and generate significant long-term value.

The Environmental Protection Agency in Sierra Leone has approved the Environmental, Social and Health Impact Assessment (ESHIA), associated Environmental, Social and Health Management Plan (ESHMP). The approval of the ESHIA and ESHMP is one of the major items required to proceed with the Sembehun project.
Related AssetSierra Rutile


Sierra Rutile Holdings Ltd. 100 % Indirect
Sierra Rutile Holdings Limited (ASX:SRX) was demerged from Iluka Resources Limited (ASX:ILU) in July 2022.

Deposit type

  • Sedimentary


The Sierra Leonean rutile mineralisation is hosted within alluvial and fluvial sedimentary facies of the Bullom Group Sediments. Mineralisation has been derived by the erosion of quartzo-feldspathic gneiss of the Precambrian Kasila group during the Tertiary and redeposited in preincised channel systems and alluvial fans flanking topographically elevated areas of the Kasila Group. The host sediments are typically poorly sorted sandy clay and sandy clays. Rubbly surficial laterite development is prevalent through much of the Bullom Group but does not hinder mining.

If the leading edge of the Sembehun group of deposits is considered as a single mineralised entity then the width of the mineralisation is over 5000m. The deposits length varies from about 1000m to over 6000m. The deposits vary significantly in size from a few mt to over 150mt. In general the mineralisation is present from surface.



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Mining Methods


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Crushers and Mills

Milling equipment has not been reported.



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CommodityUnitsAvg. AnnualLOM
Rutile kt 1762,235
Ilmenite kt 98953
Zircon kt 13
All production numbers are expressed as mineral in concentrate.

Production Costs

Cash costs Rutile USD  ....  Subscribe
* According to 2022 study / presentation.
** Net of By-Product.

Project Costs

MetricsUnitsLOM Total
Initial CapEx $M USD  ......  Subscribe
After-tax NPV @ 8% $M USD  ......  Subscribe
After-tax IRR, %  ......  Subscribe

Heavy Mobile Equipment

Fleet data has not been reported.


Mine Management

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Sep 13, 2023
....................... Subscription required ....................... Subscription required Subscription required Sep 13, 2023


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