Overview
Stage | Permitting |
Mine Type | Open Pit |
Commodities |
|
Mining Method |
|
Mine Life | 15.5 years (as of Jan 1, 2022) |
The Nachu Project represents one of the largest Mineral Resources of large flake graphite in the world.
Ausenco Services Pty Ltd completed its work on the Definitive Feasibility Study for the Nachu Project in Tanzania. This was filed with the ASX in October 2022. This paved the way for progressing the negotiation of the Framework Agreement which when completed will see 16% of the project being ceded to the Government of Tanzania in accordance with the Mining Act of Tanzania. The negotiations remain on-going although the only matter outstanding to the execution and the commencement of production is the approval of the financial model for the project. Magnis has retained its Special Exconiomic Zone registration where part of the purification of the natural graphite will occur. There are benefits from tax and other imposts from having this registration and to some extent that has caused Magnis to take longer to finalise the Framework Agreement negotiations. |
Source:
p. 10
Special Mining Licence (SML) has been granted to Uranex Tanzania Ltd, the 100% owned Tanzanian subsidiary of Magnis.
Contractors
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Summary:
The Nachu project is situated in graphitic schist with associated dolomites and gneisses.
The majority of EM modelling and geological intercepts indicate open folded anticlines with various dips to fold limbs in each resource Block.
The graphite mineralization is mostly associated with the schist, and is metamorphic (meta- sedimentary) in origin.
The Nachu deposit comprises five mineralized areas, being Blocks B, D, F, F South Limb, and J.
These deposit cover a combined strike length of 5.5 km and an average plan width of up to 300 m for B,D,J, F South and 800 m for F (often comprising multiple mineralized horizons separated by barren or low grade horizons), to depths between 150 m and 250 m below surface.
The mineralization occurs at or near surface.
Summary:
Orelogy Consulting (Orelogy) completed a mine planning study in August 2022, largely updating the work performed by Orelogy for the BFS. The updated parameters included:
- costs of processing, sales and mining;
- processing recovery;
- concentrate grade; and
- product pricing.
The mining scope included pit optimisation, mine design, scheduling and cost estimation.
The 2022 optimisation analysis demonstrated that the 2016 F and FS shells were still valid (i.e. demonstrated sufficient value) and therefore the 2016 mine plan (pit designs, mining and processing schedules, ore reserves) could be adopted for the current 2022 study.
Mine Design
Pits, waste dumps and haul roads were designed for the life of the Project as part of the 2016 BFS and these were carried over into the 2022 update. The design criteria governing slope designs, ramp widths and minimum mining widths remained valid. Locations for Run of Mine (RoM) and low grade ore stockpiles were also allocated.
The life-of-mine strip ratio is estimated at 1.5:1. Mining is set to be undertaken by the relatively conventional open pit mining method of drill, blast, shovel and truck. Base mine planning involves the use of 90 tonne excavators and 40 tonne articulated trucks. However ramp construction design parameters allow for the use of larger 90 tonne trucks.
Designs and cutbacks have been designed to suit 100t excavators and 91t payload rigid dump ........
Source:
Summary:
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Projected Production:
Commodity | Units | Avg. Annual |
Graphite
|
kt
| 236 |
All production numbers are expressed as concentrate.
Operational Metrics:
Metrics | |
Annual milling capacity
| ...... |
Stripping / waste ratio
| ...... |
Waste tonnes, LOM
| ...... |
Ore tonnes mined, LOM
| ...... |
Total tonnes mined, LOM
| ...... |
* According to 2022 study.
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Reserves at February 1, 2016:
Mineral Resource Cut-off of 3% graphitic carbon.
Mineral Resources are reported inclusive of Mineral Reserves.
Category | Tonnage | Commodity | Grade | Contained Graphite |
Proven
|
50.5 Mt
|
Graphite
|
4.6 %
|
|
Probable
|
25.7 Mt
|
Graphite
|
5.1 %
|
|
Proven & Probable
|
76.3 Mt
|
Graphite
|
4.8 %
|
3.6 Mt
|
Measured
|
63.5 Mt
|
Graphite
|
4.7 %
|
|
Indicated
|
61 Mt
|
Graphite
|
5.8 %
|
|
Inferred
|
49.6 Mt
|
Graphite
|
5.7 %
|
|
Total Resource
|
174 Mt
|
Graphite
|
5.4 %
|
|
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