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Burkina Faso
Yaramoko Mine

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 Location:
42 S from Safane, Burkina Faso

  Address:
Province des Balé - Région de la Boucle Du Mouhoun 438, Rue Worg-Ntondo, Secteur 22 Zone du Bois
Ouagadougou
Burkina Faso
01 BP 4861
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Fleet
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeUnderground
Commodities
  • Gold
Mining Method
  • Longhole stoping
  • Longitudinal stoping
  • Cemented backfill
Production Start...
Mine Life6 years (as of Jan 1, 2021)
The Yaramoko Mine Complex consists of two high- grade underground gold mines: the 55 Zone and Bagassi South.

Recent exploration drilling and a review of mine engineering designs in 2020 and 2021 supports the development of an open pit mine, at the completion of the 55 Zone underground mine, which includes the mining of near surface mineralization remaining in the crown pillar and remnant mineralization from earlier underground mining. Open pit mining would only commence at the conclusion of underground mining due to the need to remove certain key surface infrastructure associated with the underground mine.
Latest NewsFortuna reports on Yaramoko’s updated reserves and resources evaluation work and its Brownfields exploration program     January 27, 2023


Owners

Source: p. 14, 15, 35, 52
CompanyInterestOwnership
Government of Burkina Faso 10 % Indirect
Fortuna Silver Mines Inc. 90 % Indirect
Roxgold SANU S.A. (operator) 100 % Direct
Fortuna Silver Mines Inc. operates the underground Yaramoko mine in southwestern Burkina Faso.
Roxgold SANU S.A. is the principal subsidiary of the Fortuna Silver Mines.
Roxgold SANU S.A. – operates the Yaramoko gold mine.
The non-controlling interest represents a 10% interest in the legal entity that owns the Yaramoko property, by the Burkina Faso government.

Contractors

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Deposit Type

  • Orogenic
  • Vein / narrow vein
  • Hydrothermal


Summary:

Primary gold deposits in Burkina Faso occur within the Paleoproterozoic Birimian belt. Mineralization was synchronous with regional metamorphism and deformation. Gold deposits found within the Birimian greenstone belts of the West African shield are typically late orogenic hydrothermal deposits that exhibit a strong relationship with regional arrays of major shear zones. The gold mineralization is typically associated with an organized network of quartz veins containing subordinate amounts of carbonate, tourmaline, sulphides, and native gold. In these deposits, the gold is typically free milling. Alternatively, gold mineralization can also be associated with disseminated sulphides in strongly deformed alteration zones. In the alteration zones, gold may be free milling, but also refractory.

Gold mineralization is related to regional arrays of alteration and deformation zones, commonly located at major lithological discontinuities. The local controls on the distribution of the gold mineralization are structural and lithological.

In Burkina Faso, the weathering profile is deep and typically results in extensive surface oxidation of bedrock to a depth reaching more than 100 metres locally. In such areas, gold deposits typically comprise a surface oxide zone, an intermediate transition zone, and a deeper fresh rock zone. Gold is typically free milling in the oxide zone.

The gold mineralization found at the 55 Zone and Bagassi South Zone deposits i ........


Mining Methods

  • Longhole stoping
  • Longitudinal stoping
  • Cemented backfill


Summary:

Mining operations at Yaramoko are comprised of the 55 Zone underground mine, which was commissioned in 2016, and Bagassi South underground mine, which was commissioned in 2019.

Longitudinal longhole stoping with delayed cemented rockfill is the primary mining method adopted for both underground mines. Other than sill pillar stopes, up holes are drilled to breakthrough and surveyed to ensure drilling accuracy prior to production blasting. Sill pillar stopes are drilled as blind up hole stopes as these are the final level to be mined in a panel of four or three for 55 Zone and Bagassi South respectively. A longitudinal stope mining sequence, along strike from vein extremities retreating to a central access in an east and west direction.

Each stope is mined in this fashion over a 25 m strike length for 55 zone and 10 m strike length for Bagassi South.

Blast holes generally consist of parallel up holes utilizing a dice five or zipper drilling pattern due to the narrow nature of the orebody. Holes range from 12 m to 17 m in length, with some drillholes fanned out where vein widths exceed 5.0 m. Drill factors average 2.5 t to 3.5 t per drill meter, common factor for narrow vein ore bodies. Blast holes are loaded with ammonium nitrate fuel oil (ANFO) and low-density ANFO for perimeter control to a powder factor ranging from 1.00 to 1.50 kg per tonne for the initial void firings and 0.50 to 1.00 kg/t for ring firings. Any wet holes are charged with ........


Crushing and Grinding
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Processing

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Summary:

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Production:

CommodityUnits2022202120202019201820172016
Gold koz  ......  Subscription required ^  ......  Subscription required  ......  Subscription required  ......  Subscription required13312775
All production numbers are expressed as metal in doré. ^ Guidance / Forecast.
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Operational Metrics:

Metrics202220212020201920182017
Tonnes processed  ......  Subscription required  ......  Subscription required  ......  Subscription required466,157 t307,591 t266,599 t
Daily processing rate  ......  Subscription required  ......  Subscription required  ......  Subscription required730 t
Ore tonnes mined  ......  Subscription required  ......  Subscription required  ......  Subscription required479,929 t351,689 t319,855 t
Plant annual capacity  ......  Subscription required  ......  Subscription required  ......  Subscription required400 kt400 kt270 kt
Daily processing capacity  ......  Subscription required  ......  Subscription required  ......  Subscription required1,100 t
^ Guidance / Forecast.
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Reserves at December 31, 2021:
Mineral Reserves for Yaramoko are reported at a cut-off grade of 0.9 g/t Au for the 55 Zone open pit, 3.4 g/t Au for 55 Zone underground and 3.0 g/t Au for Bagassi South underground.

Yaramoko Mineral Resources are reported in situ at a gold grade cut-off grade of 0.5 g/t Au for the 55 Zone open pit and 2.7 g/t Au for underground.

CategoryTonnage CommodityGradeContained Metal
Proven 300 kt Gold 3.78 g/t 36 koz
Probable 1,826 kt Gold 7.27 g/t 427 koz
Proven & Probable 2,126 kt Gold 6.78 g/t 464 koz
Measured 48 kt Gold 5.83 g/t 9 koz
Indicated 456 kt Gold 5.8 g/t 85 koz
Measured & Indicated 504 kt Gold 5.8 g/t 94 koz
Inferred 247 kt Gold 4.41 g/t 35 koz

Commodity Production Costs:

CommodityUnits2022202120202019201820172016
Cash costs Gold USD  ......  Subscription required  ......  Subscription required 426 / oz   438 / oz   375 / oz  
Cash costs (sold) Gold USD  ......  Subscription required ^†  ......  Subscription required†
Total cash costs (sold) Gold USD  ......  Subscription required  ......  Subscription required 485 / oz   491 / oz   431 / oz  
All-in sustaining costs (sold) Gold USD  ......  Subscription required  ......  Subscription required 740 / oz   740 / oz   705 / oz  
All-in sustaining costs (sold) Gold USD  ......  Subscription required ^†  ......  Subscription required†
All-in costs Gold USD  ......  Subscription required†
^ Guidance / Forecast.
† Net of By-Product.
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Operating Costs:

Units20202019201820172016
Total operating costs ($/t milled) USD 152149184208196

Financials:

Units202220202019201820172016
Capital expenditures (planned) M USD  ......  Subscription required
Capital expenditures M USD  ......  Subscription required  ......  Subscription required 75.7   30.9  
Revenue M USD  ......  Subscription required  ......  Subscription required 168.9   159.4   41.4  
Operating Income M USD  ......  Subscription required  ......  Subscription required 69.1   44.6   8.8  
Pre-tax Income M USD  ......  Subscription required  ......  Subscription required 66.9   30.4   -1.8  
After-tax Income M USD  ......  Subscription required  ......  Subscription required 45   23.2   -1.1  
Subscription required - Subscription is required



Heavy Mobile Equipment as of December 31, 2021:
HME TypeModelQuantityLeased or
Contractor
Drill ....................... Subscription required Leased
Drill (long hole) ....................... Subscription required Leased
Drill jumbo (single boom) ....................... Subscription required Leased
Drill jumbo (two boom) ....................... Subscription required Leased
Grader ....................... Subscription required Leased
Loader ....................... Subscription required ....................... Subscription required Leased
Loader ....................... Subscription required ....................... Subscription required Leased
Shotcreter ....................... Subscription required Leased
Trans Mixer ....................... Subscription required Leased
Truck (service) ....................... Subscription required Leased
Truck (underground) ....................... Subscription required ....................... Subscription required Leased
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Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Dec 31, 2021
....................... Subscription required ....................... Subscription required Subscription required Dec 31, 2021
....................... Subscription required ....................... Subscription required Subscription required Mar 25, 2022
....................... Subscription required ....................... Subscription required Subscription required Mar 25, 2022
....................... Subscription required ....................... Subscription required Subscription required Mar 25, 2022
....................... Subscription required ....................... Subscription required Subscription required Mar 25, 2022
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Corporate Filings & Presentations:

DocumentYear
Corporate Presentation 2022
Corporate Presentation 2022
Press Release 2022
................................... 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 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
Annual Information Form 2018
Financial Review 2018
Management Discussion & Analysis 2018
Press Release 2018
Feasibility Study Report 2017
Financial Review 2017
Management Discussion & Analysis 2017
Management Discussion & Analysis 2016
Feasibility Study Report 2014
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News:

NewsDate
Fortuna reports on Yaramoko’s updated reserves and resources evaluation work and its Brownfields exploration program January 27, 2023

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