Overview
| Stage | Permitting |
| Mine Type | Open Pit |
| Commodities |
|
| Mining Method |
|
| Mine Life | 13 years (as of Jan 1, 2022) |
Sierra Rutile also holds one of the world’s largest and highest quality known natural rutile deposits, the Sembehun Project.
Sembehun, located approximately 30 kilometres from the current Area 1 operations, presents an attractive development opportunity with long mine life, good grades, contiguous deposits, and additional exploration potential that can all leverage the extensive Area 1 infrastructure investment.
Sembehun DFS commenced and is being funded by internal cash generation. On track for completion late 2023. |
| Latest News | Sierra Rutile Holdings Delivers 2023 Half Year Results August 24, 2023 |
Source:
Sierra Rutile Holdings Limited (ASX:SRX) was demerged from Iluka Resources Limited (ASX:ILU) in July 2022.
Contractors
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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.
Summary:
Ore will extracted via conventional truck and shovel mining method.
Source:
Summary:
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Projected Production:
| Commodity | Units | Avg. Annual | LOM |
|
Rutile
|
kt
| 176 | 2,235 |
|
Ilmenite
|
kt
| ...... | ...... |
|
Zircon
|
kt
| ...... | |
All production numbers are expressed as mineral in concentrate.
Reserves at December 31, 2021:
As of December 31, 2022, there were no changes in the Mineral Resources and Reserves at Sembehun Expansion compared to December 31, 2021.
A calculated cut-off grade of 0.25% Rutile was applied to the Mineral Resource.
| Category | Tonnage | Commodity | Grade | Contained 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:
| | Commodity | Units | Average |
|
Cash costs
|
Rutile
|
USD
|
......
|
* According to 2022 study / presentation.
† Net of By-Product.
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2022 Study Costs and Valuation Metrics :
| Metrics | Units | LOM Total |
|
Initial CapEx
|
$M USD
|
......
|
|
After-tax NPV @ 8%
|
$M USD
|
......
|
|
After-tax IRR, %
|
|
......
|
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