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Namibia
Okanjande/Okorusu Mine

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 Location:
192 km SW from Grootfontein, Namibia

  Project Contacts:
Box 279
Manotick
Ontario, Canada
K4M 1K7
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Fleet
  • Personnel
  • Filings & News

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Overview

StageRestarting
Mine TypeOpen Pit
Commodities
  • Graphite
Mining Method
  • Truck & Shovel / Loader
Production Start...
Mine Life10 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.


Owners

Source: p. 8
CompanyInterestOwnership
Northern Graphite Corp. 100 % Indirect
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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Deposit Type

  • Metamorphic


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 ........


Mining Methods

  • Truck & Shovel / Loader


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 ........


Crushing and Grinding
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Processing

Flow Sheet: Subscription required

Summary:

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Projected Production:

CommodityUnitsAvg. AnnualLOM
Graphite kt 32308
All production numbers are expressed as concentrate.

Operational Metrics:

Metrics
Stripping / waste ratio  ......  Subscription required
Annual mining capacity  ......  Subscription required
Waste tonnes, LOM  ......  Subscription required
Ore tonnes mined, LOM  ......  Subscription required
Total tonnes mined, LOM  ......  Subscription required
Tonnes milled, LOM  ......  Subscription required
Annual milling capacity  ......  Subscription required
Annual ore mining rate  ......  Subscription required
* According to 2022 study.
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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.

CategoryTonnage CommodityGradeContained 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

Commodity Production Costs:

CommodityUnitsAverage
All-in costs Graphite USD  ......  Subscription required&nbs
C2 total cash costs Graphite USD  ......  Subscription required&nbs
Assumed price Graphite USD  ......  Subscription required&nbs
* According to 2022 study / presentation.
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Operating Costs:

Units2022
OP mining costs ($/t mined) USD 4.66 *
OP mining costs ($/t milled) USD  ......  Subscription required
Processing costs ($/t milled) USD  ......  Subscription required
G&A ($/t milled) USD  ......  Subscription required
Total operating costs ($/t milled) USD  ......  Subscription required
* According to 2022 study.
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2022 Study Costs and Valuation Metrics :

MetricsUnitsLOM Total
Initial CapEx $M USD  ......  Subscription required
Expansion CapEx $M USD  ......  Subscription required
Sustaining CapEx $M USD  ......  Subscription required
Working capital $M USD  ......  Subscription required
Closure costs $M USD  ......  Subscription required
Total CapEx $M USD  ......  Subscription required
OP OpEx $M USD  ......  Subscription required
Processing OpEx $M USD 90.1
Transportation (haulage) costs $M USD 37.8
G&A costs $M USD 63.4
Total OpEx $M USD  ......  Subscription required
Income Taxes $M USD  ......  Subscription required
Gross revenue (LOM) $M USD  ......  Subscription required
Net Income (LOM) $M USD  ......  Subscription required
Pre-tax Cash Flow (LOM) $M USD  ......  Subscription required
After-tax Cash Flow (LOM) $M USD  ......  Subscription required
Pre-tax NPV @ 8% $M USD  ......  Subscription required
After-tax NPV @ 8% $M USD  ......  Subscription required
Pre-tax IRR, %  ......  Subscription required
After-tax IRR, %  ......  Subscription required
Pre-tax payback period, years  ......  Subscription required
After-tax payback period, years  ......  Subscription required
Subscription required - Subscription is required.


Proposed Heavy Mobile Equipment as of July 1, 2022:
HME TypeModelSizeQuantityLeased or
Contractor
Dozer (crawler) 40 t ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Sep 20, 2022
....................... Subscription required ....................... Subscription required Subscription required Jul 1, 2022
....................... Subscription required ....................... Subscription required Subscription required Jul 1, 2022
....................... Subscription required ....................... Subscription required Subscription required Oct 20, 2022
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Staff:

EmployeesYear
Subscription required 2022

Corporate Filings & Presentations:

DocumentYear
Corporate Presentation 2022
Preliminary Economic Assessment 2022
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