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Sierra Leone
Sembehun Expansion Project (Sierra Rutile)

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 Location:
96 km SE from Freetown, Sierra Leone

  Project Contacts:
Level 8, 225 St Georges Terrace
Perth
Western Australia, Australia
6000
Phone  ...  Subscription required
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  • Overview
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  • Geology
  • Mining
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  • Production
  • Reserves
  • Costs & Financials
  • Personnel
  • Filings & News

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Overview

StagePermitting
Mine TypeOpen Pit
Commodities
  • Rutile
  • Ilmenite
  • Zircon
Mine Life13 years (as of Jan 1, 2022)
One of the largest and highest-grade natural rutile deposits in the world.


Owners

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

Contractors

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Deposit Type

  • Sedimentary


Summary:

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.


Mining Methods


Summary:

Ore will extracted via conventional truck and shovel mining method.


Crushing and Grinding


Processing

Source: Subscription required

Summary:

- subscription is required.


Projected Production:

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


Reserves at December 31, 2021:

CategoryTonnage CommodityGradeContained Metal
Proven 111 Mt Rutile 1.5 % 1.6 Mt
Proven 111 Mt Ilmenite 0.9 % 1 Mt
Proven 111 Mt Zircon 0.1 % 0.1 Mt
Probable 63 Mt Rutile 1.4 % 0.9 Mt
Probable 63 Mt Ilmenite 0.9 % 0.6 Mt
Probable 63 Mt Zircon 0.1 % 0.1 Mt
Proven & Probable 174 Mt Rutile 1.5 % 2.5 Mt
Proven & Probable 174 Mt Ilmenite 0.9 % 1.6 Mt
Proven & Probable 174 Mt Zircon 0.1 % 0.2 Mt
Measured 134 Mt Rutile 1.4 % 1.9 Mt
Measured 134 Mt Ilmenite 0.9 % 1.2 Mt
Measured 134 Mt Zircon 0.1 % 0.1 Mt
Indicated 167 Mt Rutile 1 % 1.7 Mt
Indicated 167 Mt Ilmenite 0.7 % 1.2 Mt
Indicated 167 Mt Zircon 0.1 % 0.1 Mt
Inferred 207 Mt Rutile 0.9 % 1.9 Mt
Inferred 207 Mt Ilmenite 0.6 % 1.3 Mt
Inferred 207 Mt Zircon 0.1 % 0.1 Mt
Total Resource 508 Mt Rutile 1.1 % 5.5 Mt
Total Resource 508 Mt Ilmenite 0.7 % 3.7 Mt
Total Resource 508 Mt Zircon 0.1 % 0.4 Mt

Commodity Production Costs:

CommodityUnitsAverage
Cash costs Rutile USD  ......  Subscription required *†
* According to 2022 study / presentation.
† Net of By-Product.
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2022 Study Costs and Valuation Metrics :

MetricsUnitsLOM Total
Initial CapEx $M USD  ......  Subscription required
After-tax NPV @ 8% $M USD  ......  Subscription required
After-tax IRR, %  ......  Subscription required
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Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Oct 19, 2022
....................... Subscription required ....................... Subscription required Subscription required Oct 19, 2022
Subscription required - Subscription is required.


Corporate Filings & Presentations:

DocumentYear
Corporate Presentation 2022
Corporate Presentation 2022
Press Release 2022
................................... Subscription required 2020
................................... Subscription required 2019
Press Release 2018
Other 2017
Year-end Mineral Reserves 2017
Corporate Presentation 2016
Press Release 2016
Year-end Mineral Reserves 2012
Subscription required - Subscription is required.

Subscription required - Subscription is required.

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