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Namibia
Otjikoto Mine

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 Location:
48 km SW from Otavi, Namibia

  Regional Office:
20 Nachtigal Street Ausspannplatz,
P.O Box 80363
Windhoek
Namibia
9000
Phone  ...  Subscription required
Fax+264-61-295-8799
WebsiteWeb
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Fleet
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeOpen Pit & Underground
Commodities
  • Gold
Mining Method
  • Truck & Shovel / Loader
  • Transverse open stoping
  • Cemented backfill
  • Paste backfill
Production Start...
Mine Life2025
The Otjikoto Mine is comprised of two open pits, Otjikoto and Wolfshag.

Development of the Wolfshag underground mine commenced in late 2020, and ore production is scheduled for the first half of 2022.


Owners

Source: p. 18
CompanyInterestOwnership
B2Gold Corp. 90 % Indirect
B2Gold Namibia (Pty) Ltd. (operator) 100 % Direct
B2Gold Namibia is a joint operation between a Canadian company, B2Gold, that holds 90% shares, and local mining company, EVI Mining, with 10% shares.

Contractors

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Deposit Type

  • Vein / narrow vein
  • Orogenic


Summary:

The Otjikoto deposit is located within the Damara Mobile Belt, within the northern portion of the northeasterly-striking “Intracratonic Branch” of the belt. It is considered to be an example of an orogenic-style gold deposit.

The Otjikoto area is predominantly underlain by lithologies belonging to the Neoproterozoic Swakop Group. The Okonguarri Formation hosts the gold mineralization and is overlain and underlain by glacial diamictite horizons of the Ghaub and Chuos Formations, respectively. The Okonguarri Formation consists primarily of thick units of dark grey carbonaceous marble, biotite-schist, graphitic schist and calc-silicate horizons. The schist units are derived from semi-pelitic, pelitic, marl and psammitic units in a turbiditic sedimentary package. The rocks in the Otjikoto area have experienced at least three phases of moderate to tight folding and some thrust faulting. They have also been affected by extensive metasomatism, followed by prograde regional metamorphism that has reached upper greenschist to lower amphibolite facies.

Mineralization in the main Otjikoto deposit is hosted by a north–northeast striking sheeted sulphide (+ magnetite)–quartz + carbonate vein system that has a strike length of about 2.6 km, and extends at depth to at least 475 m below surface. The gold occurs in a series of thin (commonly <10 cm) sheeted veins in the Upper and Middle Okonguarri Formation. The veins and associated mineralization form a series of en-ec ........


Mining Methods

  • Truck & Shovel / Loader
  • Transverse open stoping
  • Cemented backfill
  • Paste backfill


Summary:

The Otjikoto Mine is currently an owner-operated conventional open pit operation. Development of the Wolfshag underground mine commenced in late 2020, and ore production is scheduled for the first half of 2022.

Open pit Mineral Reserves will be mined from the Otjikoto and Wolfshag pits for three years, including 2022. The current underground mine plan projects that Mineral Reserves will be mined from the Wolfshag deposit for approximately four years starting in 2022.

The mining operations use conventional open pit mining methods and equipment. Mining is based on a phased approach with stockpiling to bring high-grade forward and provide operational flexibility.

Ten geotechnical domains have been defined in two oxidation domains (calcrete and oxidized; fresh rock), and pit slope angles vary by geotechnical domain. Inter-berm angles range from 30–60º. Beginning at the 1465 RL, 15 m wide geotechnical berms are included in the design on 60 m intervals. These criteria were the basis for the OSA applied in the optimization analysis.

Groundwater is actively extracted ahead of mining from a single dewatering borehole situated between the Otjikoto and Wolfshag pits. Excess water that accumulates in the pit due to groundwater seepage and rainwater accumulation is collected in sumps located in low spots in each pit and pumped to the return water dam.

Where possible, ramps were located in the east wall of both pits to mitigate potent ........


Crushing and Grinding
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Processing

Flow Sheet: Subscription required

Summary:

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^ Guidance / Forecast.

Production:

CommodityUnits2022202120202019201820172016
Gold oz  ......  Subscription required ^  ......  Subscription required  ......  Subscription required  ......  Subscription required167,346191,534166,285
All production numbers are expressed as metal in doré. ^ Guidance / Forecast.
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Operational Metrics:

Metrics202120202019201820172016
Tonnes milled  ......  Subscription required  ......  Subscription required3,415,475 t3,445,932 t3,492,285 t3,468,488 t
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Reserves at December 31, 2021:
Mineral Reserves to be mined using open pit methods or in stockpiles are reported above a cut-off grade of 0.45 g/t Au.
Mineral Reserves to be mined using underground methods are reported above a cut-off grade of 2.68 g/t Au.
Mineral Resources that are amenable to open pit mining are reported at a cut-off grade of 0.27 g/t Au.
Mineral Resources that are amenable to underground mining are reported at cut-off grades of 1.5, 2.25 or 3.25 g/t Au and a minimum thickness of 1.5 m.

CategoryTonnage CommodityGradeContained Metal
Probable 11,600 kt Gold 1.66 g/t 620 koz
Indicated 48,200 kt Gold 0.88 g/t 1,370 koz
Inferred 6,600 kt Gold 1.8 g/t 380 koz

Commodity Production Costs:

CommodityUnits202220212020201920182017
Cash costs (sold) Gold USD  ......  Subscription required&nbs  ......  Subscription required  ......  Subscription required  ......  Subscription required 508 / oz  
Cash costs Gold USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 502 / oz   468 / oz  
Total cash costs (sold) Gold USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 559 / oz  
Total cash costs Gold USD 553 / oz   512 / oz  
All-in sustaining costs (sold) Gold USD  ......  Subscription required&nbs  ......  Subscription required  ......  Subscription required  ......  Subscription required 724 / oz  
All-in sustaining costs (AISC) Gold USD 719 / oz   715 / oz  
^ Guidance / Forecast.
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Operating Costs:

Units20162015
OP mining costs ($/t mined) USD 1.54
OP mining costs ($/t milled) USD  ......  Subscription required
Processing costs ($/t milled) USD  ......  Subscription required  ......  Subscription required
Total operating costs ($/t milled) USD  ......  Subscription required
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Financials:

Units2022202120202019201820172016
Capital expenditures (planned) M USD  ......  Subscription required
Capital expenditures M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 50.8   41.2   39.2  
Revenue M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 213.1   235.9   207.7  
After-tax Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 6.4   46.9   57  
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Pipelines
TypeMaterialDiameterLengthDescription


Heavy Mobile Equipment:
HME TypeModelQuantityLeased or
Contractor
Ref. Date
Dozer (crawler) ....................... Subscription required ....................... Subscription required Dec 31, 2018
Dozer (crawler) ....................... Subscription required ....................... Subscription required Dec 31, 2018
Dozer (crawler) ....................... Subscription required ....................... Subscription required Dec 31, 2018
Dozer (rubber tire) ....................... Subscription required ....................... Subscription required Dec 31, 2018
Drill (blasthole) ....................... Subscription required ....................... Subscription required Dec 31, 2018
Drill (blasthole) ....................... Subscription required ....................... Subscription required Dec 31, 2018
Drill (long hole) ....................... Subscription required ....................... Subscription required Leased Apr 11, 2022
Excavator ....................... Subscription required ....................... Subscription required Dec 31, 2018
Excavator ....................... Subscription required ....................... Subscription required Dec 31, 2018
Excavator ....................... Subscription required ....................... Subscription required Dec 31, 2018
Grader ....................... Subscription required ....................... Subscription required Dec 31, 2018
Grader ....................... Subscription required ....................... Subscription required Dec 31, 2018
Jumbo ....................... Subscription required ....................... Subscription required Leased Apr 11, 2022
Jumbo ....................... Subscription required ....................... Subscription required Leased Apr 11, 2022
Loader ....................... Subscription required ....................... Subscription required Leased Apr 11, 2022
Loader ....................... Subscription required ....................... Subscription required Dec 31, 2018
Loader ....................... Subscription required ....................... Subscription required Dec 31, 2018
Shovel ....................... Subscription required ....................... Subscription required Dec 31, 2018
Truck (haul) ....................... Subscription required ....................... Subscription required Dec 31, 2018
Truck (haul) ....................... Subscription required ....................... Subscription required Dec 31, 2018
Truck (service) ....................... Subscription required Dec 31, 2018
Truck (underground) ....................... Subscription required ....................... Subscription required Leased Apr 11, 2022
Truck (water) ....................... Subscription required ....................... Subscription required Dec 31, 2018
Truck (water) ....................... Subscription required ....................... Subscription required Dec 31, 2018
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Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Apr 11, 2022
....................... Subscription required ....................... Subscription required Subscription required Apr 11, 2022
....................... Subscription required ....................... Subscription required Subscription required Apr 11, 2022
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Corporate Filings & Presentations:

DocumentYear
Other 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
Annual Information Form 2018
Management Discussion & Analysis 2018
Press Release 2018
Technical Report 2018
Annual Information Form 2017
Financial Review 2017
Management Discussion & Analysis 2017
Press Release 2017
Annual Information Form 2016
Management Discussion & Analysis 2016
Annual Information Form 2015
Management Discussion & Analysis 2015
Feasibility Study Report 2013
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