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Burkina Faso
Bissa Mine (Bissa-Bouly Operation)

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 Location:
88 km N from Ouagadougou, Burkina Faso

  Address:
11 BP 1229 CMS OUAGA 11 783 Rue de la Chambre de Commerce
15 618 commune de Ouagadougou Ouaga 2000
Ouagadougou
Burkina Faso
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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
Commodities
  • Gold
Mining Method
  • Truck & Shovel / Loader
Production Start...
Mine Life7 years (as of Jan 1, 2020)


Owners

Source: p. 90
CompanyInterestOwnership
Government of Burkina Faso 10 % Indirect
Nord Gold plc 90 % Indirect
Bissa Gold SA (operator) 100 % Direct
Nord Gold plc. owns 90% interest in the Bissa and Bouly mines through Bissa Gold SA and the remaining 10% is owned by the government of Burkina Faso.

Contractors

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Deposit Type

  • Orogenic
  • Vein / narrow vein


Summary:

The Bissa and Bouly gold deposits all occur within an approximate 90 km NW-SE zone, comprising Birimian volcano-sedimentary rocks of the Boromo greenstone belt. The belt consists of mafic volcanic rock, minor felsic volcanic rock and extensive sedimentary units, intruded by Eburnean granitoids, all of which have undergone incipient to low greenschist facies metamorphism (Huot and Sattran, 1987).

The Bissa Hill, SW, IOSE, Z51, Z52 and Boken Zandkom deposits all fall within an approximate 9km NE-SW oriented corridor (“the Bissa-Zandkom corridor”) in the northeastern portion of the Boromo greenstone belt. This corridor comprises a series of interbedded argillaceousarenaceous sediments, alongside sequences of mafic volcanic rock. The thick metasedimentary sequence represents the principal host to mineralisation. Structurally, the lithological assemblage at Bissa-Zandkom appears to be tightly folded, with a broad NE to ENE trend, and is offset by several large-scale faults that trend NW-SE. At least two phases of deformation can be identified at the mine-scale, including an earlier D1 and later D2, resulting in a re-folded fold sequence.

Mineralisation at the Bissa and Bouly deposits is primarily orogenic and structurally controlled, with a secondary lithological control. The most significant mineralised zones are associated with anastomosing networks of quartz and quartz-carbonate veins (or stacked, parallel “arrays” of veins) developed within major brittle- ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

The operation envisages open pit mining, utilising drill & blast with a truck and shovel approach to ore and waste haulage. Mining operations at Bissa are focused on a number of different open pits. Bissa gold mine operates a typical modern open pit operation with drilling and blasting followed by load and haul allowing for selective mining of the ore. The material lithologies are divided into four main categories: Laterite, Saprolite, Transition, and Fresh. Fleet capacity is sufficient, with only rebuilding and some replacement capital necessary during the LoM. There are currently 39 trucks with a payload of 100 t that are used for production from the open pits. Assumed cycle times average 24 minutes. The mine has several significant opportunities to extend the LoM but this will depend on the exploration program and the gold price. The ramps have been designed at a gradient of 10% at 23 m width. The mining benches are between 8 m and 16 m high and are loaded out in 4 m fletches.


Crushing and Grinding
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Processing

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Summary:

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Production:

CommodityUnits2021202020192018201720162015
Gold koz  ......  Subscription required  ......  Subscription required  ......  Subscription required155196186235
All production numbers are expressed as metal in doré.
Subscription required - Subscription is required.

Operational Metrics:

Metrics202020192018201720162015
Total tonnes mined  ......  Subscription required43,120 kt41,680 kt37,526 kt
Ore tonnes mined  ......  Subscription required5,494 kt5,184 kt6,254 kt3,948 kt4,545 kt
Waste  ......  Subscription required37,626 kt36,496 kt31,272 kt
Stripping / waste ratio  ......  Subscription required7 5 5.2 8.79 4.5
Tonnes processed  ......  Subscription required4,750 kt4,861 kt4,184 kt4,097 kt
Annual processing capacity  ......  Subscription required
Subscription required - Subscription is required.

Reserves at December 31, 2020:
Cut-off grades for resources range from 0.36 to 0.72 g/t Au depending on deposit.
Cut-off grades for reserves are variable.

CategoryTonnage CommodityGradeContained Metal
Proven 3,308 kt Gold 1.2 g/t 128 koz
Probable 28,349 kt Gold 1.1 g/t 1,015 koz
Proven & Probable 31,657 kt Gold 1.1 g/t 1,144 koz
Measured 6,808 kt Gold 1.52 g/t 333 koz
Indicated 51,783 kt Gold 1.27 g/t 2,119 koz
Measured & Indicated 58,591 kt Gold 1.3 g/t 2,451 koz
Inferred 12,614 kt Gold 1.31 g/t 530 koz
Total Resource 71,205 kt Gold 1.3 g/t 2,982 koz

Commodity Production Costs:

CommodityUnits20202019
Total cash costs Gold USD  ......  Subscription required†  ......  Subscription required†
All-in sustaining costs (AISC) Gold USD  ......  Subscription required†  ......  Subscription required†
† Net of By-Product.
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Operating Costs:

Units20202019201820172016
Processing costs ($/t milled) USD 9.369.588.938.549.75

Financials:

Units20202019201820172016
Sustaining costs M USD  ......  Subscription required  ......  Subscription required 54   33.2   34.8  
Capital expenditures M USD  ......  Subscription required  ......  Subscription required 61.4   35.7   35.6  
Revenue M USD  ......  Subscription required  ......  Subscription required 197.4   246.5   230.4  



Heavy Mobile Equipment:
HME TypeModelSizeQuantityRef. Date
Bulldozer ....................... Subscription required ....................... Subscription required Jul 20, 2012
Bulldozer ....................... Subscription required ....................... Subscription required Jul 20, 2012
Excavator ....................... Subscription required ....................... Subscription required Jul 20, 2012
Excavator ....................... Subscription required ....................... Subscription required Jul 20, 2012
Excavator ....................... Subscription required ....................... Subscription required Jul 20, 2012
Grader ....................... Subscription required ....................... Subscription required Jul 20, 2012
Loader (FEL) ....................... Subscription required ....................... Subscription required Jul 20, 2012
Loader (FEL) ....................... Subscription required ....................... Subscription required Jul 20, 2012
Loader (FEL) ....................... Subscription required ....................... Subscription required Jul 20, 2012
Truck (dump) 100 t ....................... Subscription required Jun 3, 2021
Truck (dump) ....................... Subscription required 50 t ....................... Subscription required Jul 20, 2012
Truck (water) ....................... Subscription required ....................... Subscription required Jul 20, 2012
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Aug 12, 2022
....................... Subscription required ....................... Subscription required Subscription required Aug 12, 2022
....................... Subscription required ....................... Subscription required Subscription required Aug 12, 2022
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Staff:

EmployeesYear
Subscription required 2016
Subscription required 2015

Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
Annual Report 2018
Annual Report 2017
Press Release 2017
Integrated Report 2016
Corporate Presentation 2015
Technical Report 2012
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