Overview
| Stage | Restarting |
| Mine Type | Open Pit |
| Commodities |
|
| Mining Method |
|
| Production Start | ...  |
| Mine Life | 10 years (as of Jan 1, 2022) |
Mining started at Okanjande in 2017 and the ROM product was transported to the idle Okorusu Fluorspar mine site (“Okorusu”) for processing over an 18-month period, before the Okanjande Mine was placed on care and maintenance in October 2018. |
Source:
p. 8
Northern Graphite Corporation (“Northern” or the “Company”), a Canadian company listed on the TSX Venture Exchange (“TSX- V”), recently acquired 100 per cent ownership of Imerys Gecko Holdings (Pty) Ltd (“Holdings”) which in turn owns a 100 per cent interest in Imerys Gecko Graphite (Namibia) (Pty) Ltd (“IGG”) and a 100 per cent interest in Imerys Gecko Okanjande Mining (Pty) Ltd (“IGOM”).
IGOM holds Mining Licence (“ML”) 196 (the “Property”) which covers the Okanjande graphite deposit.
Contractors
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Summary:
The Okanjande deposit fits the description of a crystalline flake graphite deposit in a paragneiss. The original rocks at the Okanjande deposit were arkoses, feldspathic quartzites and ortho-quartzites that have been subjected to high grade metamorphism to become feldspathic-quarzitic gneisses and graphitic quartzites.
The Okanjande deposit is a massive deposit with shallow dipping layering to the southeast. Its surface extent is approximately 900 m northeast to southwest and up to 820 m from northwest to southeast. The mineralization extends from surface and has been defined by drilling up to a depth of 90 m below surface. The mineralization is open at depth.
The Okanjande deposit reaches its highest grade and is thickest in the centre, with graphitic carbon grades and mineralization thickness decreasing towards the peripheries. The contacts of the graphite units are difficult to define as they tend to be transitional. The graphite mineralization is typically defined over zones of significant total graphitic carbon grade rather than discrete lithologies, since the mineralized and non-mineralized rocks can be petrographically and stratigraphically the same. Unmineralized / waste zones are typically graphitic poor gneisses/quartzite, interbedded within the graphitic gneiss/quartzite or irregular intrusive pegmatites and granites. Two other waste rocks identified at the Okanjande deposit include a pinkish coloured, phlogopite-rich quartzite, which is typic ........
Summary:
The Okanjande graphite deposit lends itself to being mined by opencast mining methods. The intention is to mine at an average rate of 631,450 tonnes of mineralised material per year which will be transported to the Okorusu plant for treatment.
The Okanjande Deposit was mined from August 2017 until October 2018, when mining ceased and the Okanjande Mine was placed on care and maintenance. The run of mine (“RoM”) graphite-bearing material was trucked to Okorusu for processing.
The intention is to mine the Okanjande deposit by making use of contractors who will supply their own mining equipment to deliver the graphite-bearing material to a product stockpile and the balance to a waste rock dump. Overburden will be stockpiled on a separate overburden stockpile. It is not envisaged that any waste material will be backfilled into the pit at this stage as there is further fresh graphite-bearing material at depth; this fresh graphite-bearing material will be the subject of a future economic assessment.
The mining contractors will also be responsible for crushing the ore (single-stage jaw crusher) and loading into side tippers to be transported to the plant at Okorusu.
The Minex geological model, which was reviewed by the MSA Mineral Resources team, was uploaded into Deswik mine design software. A pit shell was defined incorporating only the weathered graphite-bearing material and using geotechnical parameters as defined in the previous mine ........
Source:
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Flow Sheet:
Summary:
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Reserves at November 29, 2021:
Weathered Mineral Resource at a cut-off grade of 2.6% TGC as at 29 November 2021.
Fresh Mineral Resource at a cut-off grade of 3.1% TGC as at 29 November 2021.
| Category | Tonnage | Commodity | Grade | Contained Metal |
|
Measured
|
9 Mt
|
Total Graphitic Carbon
|
5.7 %
|
512 kt
|
|
Indicated
|
22.2 Mt
|
Total Graphitic Carbon
|
4.8 %
|
1,076 kt
|
|
Measured & Indicated
|
31.3 Mt
|
Total Graphitic Carbon
|
5.1 %
|
1,588 kt
|
|
Inferred
|
7.8 Mt
|
Total Graphitic Carbon
|
4.8 %
|
378 kt
|
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