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Burkina Faso
Mana Mine

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 Location:
25 km SW from Safane, Burkina Faso

  Address:
Sector 13, Babanguida Avenue Benda Street, Door # 211
Ouagadougou
Burkina Faso
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Fax(011)-226-50-36-95-87
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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
  • Longhole stoping
  • Transverse open stoping
  • Longitudinal retreat
  • Cemented backfill
Production Start...
Mine Life10 years (as of Jan 1, 2021)


Owners

Source: p. 48
CompanyInterestOwnership
Government of Burkina Faso 10 % Indirect
Endeavour Mining plc 90 % Indirect
SEMAFO Burkina Faso S.A. (operator) 100 % Direct
Mana's mineral rights comprise of one mining exploitation permit. The Mana License is held by Semafo Burkina Faso. Endeavour, indirectly through its subsidiary Semafo (Barbados) Ltd., holds a 90% stake in Semafo BF. The remaining 10% interest in Semafo BF is held by the State of Burkina Faso.

Contractors

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Deposit Type

  • Vein / narrow vein
  • Orogenic


Summary:

The Mana district is located in the northern part of the Houndé greenstone belt. Five gold deposits, WonaKona, Nyafé, Fofina, Yaho and Siou, are hosted in different rock types. The lithostratigraphic succession is typical of greenstone belts and is characterized at the base by a major tholeiitic basaltic suite with some intercalations of argillic sedimentary rocks that are overlain by predominant pelagic and detrital sedimentary rocks (shale, sandstones, greywacke and volcanoclastics). The Mana district basalt unit has undergone submarine hydrothermal alteration with epidote, chlorite and local albite, and shows zones of strong silicification, some of which are anomalous in gold. The Paleoproterozoic formations are affected by polyphase deformation and greenschist facies metamorphism with amphibolite facies assemblages that locally occur as metamorphic aureoles around some later formed granitoids.

All deposits on the Mana property are characterized as typical West African, shear-hosted orogenic gold deposits. The major sulphides associated with the gold mineralization are pyrite and arsenopyrite. Free visible gold is encountered at the Wona-Kona and Siou deposits. Magnetite occurs as small millimetric prisms along schistosity planes in the walls of mineralized zones. The five major deposits of the Mana property are described below.

The Wona-Kona deposit is hosted in a series of deformed sedimentary, volcano-sedimentary and metavolcanic rocks. The gold mi ........


Mining Methods

  • Truck & Shovel / Loader
  • Longhole stoping
  • Transverse open stoping
  • Longitudinal retreat
  • Cemented backfill


Summary:

Two mining methods are employed at the Mana Mine, namely open pit and underground. Open pit mining will continue in 2021 in the Wona South pit, and underground mining at Siou. Following completion of the updated PFS, underground mining will be employed below the Wona open pit, in addition to the existing Siou underground mine.

OPEN PIT MINING
Open pit mine production at Mana averages approximately 5,000 t/d of ore (bedrock), and mining has been mainly active in the Wona and Siou pits prior to 2021.

The Siou open pit was exhausted in 2020, and open pit production will focus on the southern half of the Wona pit in 2021 and 2022, through to completion of that pit. Mining is carried out using a mix of ‘owner’ and ‘rental’ fleets. The equipment ranges from 120-250 t backhoe excavators, loading 90 t rigid dump trucks. Drilling is currently carried out using a combination of Endeavour owned and contracted drill rigs.

The current stages of the open pit mining require waste stripping (Stage 3) for approximately eight months, to remove ~8Mt of waste before reaching ore. During this waste stripping, ore supply to the plant will be from the underground mining at Siou and the open pit mining of Wona South (Stage 2).

Production drilling and blasting is carried out on 10m benches. Loading and hauling is carried out in four flitches each measuring 2.5 m. The highly weathered zone of oxide (clays and saprolite) and transitional zone with a d ........


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 required181206240
All production numbers are expressed as metal in doré. ^ Guidance / Forecast.
Subscription required - Subscription is required.

Operational Metrics:

Metrics202120202019201820172016
Total tonnes mined  ......  Subscription required  ......  Subscription required
Ore tonnes mined  ......  Subscription required  ......  Subscription required1,437,400 t2,109,700 t2,268,100 t
Waste  ......  Subscription required  ......  Subscription required9,253,800 t17,802,100 t16,913,100 t
Stripping / waste ratio  ......  Subscription required  ......  Subscription required6.9 8.4 7.5
Daily ore mining rate  ......  Subscription required  ......  Subscription required
Tonnes processed  ......  Subscription required  ......  Subscription required2,061,200 t2,573,900 t2,739,900 t2,753,300 t
Daily processing capacity  ......  Subscription required  ......  Subscription required8,000 t8,000 t8,000 t8,000 t
Daily mining capacity  ......  Subscription required  ......  Subscription required110,000 t
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Reserves at December 31, 2021:
Cut-off grades for the resources are as follows: open pit for oxide at 0.41g/t Au to 0.56g/t Au, for transitional 0.44g/t Au to 0.69 g/t Au, and sulphide at 0.72g/t Au to 2.54g/t Au.

Cut-off grades for the reserves are as follows: OP: oxide: 0.50g/t Au; transitional: 0.60g/t Au; fresh: 1.20g/t Au; UG: Siou: 2.50g/t Au; Wona: 2.30g/t Au.

CategoryTonnage CommodityGradeContained Metal
Proven 1.3 Mt Gold 3.54 g/t 150 koz
Probable 10.1 Mt Gold 3.09 g/t 1,007 koz
Proven & Probable 11.5 Mt Gold 3.14 g/t 1,157 koz
Measured 7.5 Mt Gold 1.48 g/t 359 koz
Indicated 30.1 Mt Gold 1.99 g/t 1,928 koz
Measured & Indicated 37.6 Mt Gold 1.89 g/t 2,287 koz
Inferred 7.8 Mt Gold 2.27 g/t 570 koz

Commodity Production Costs:

CommodityUnits2022202120202019201820172016
Total cash costs (sold) Gold USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 786 / oz   655 / oz   548 / oz  
All-in sustaining costs (sold) Gold USD  ......  Subscription required&nbs  ......  Subscription required  ......  Subscription required  ......  Subscription required 1,056 / oz   942 / oz   720 / oz  
^ Guidance / Forecast.
Subscription required - Subscription is required.

Operating Costs:

Units20212020201920182017
OP mining costs ($/t mined) USD 3.743.57
UG mining costs ($/t mined) USD  ......  Subscription required  ......  Subscription required
Processing costs ($/t milled) USD  ......  Subscription required  ......  Subscription required
G&A ($/t milled) USD  ......  Subscription required  ......  Subscription required
Total operating costs ($/t milled) USD  ......  Subscription required  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required.

Financials:

Units202220212020201920182017
Capital expenditures (planned) M USD  ......  Subscription required
Capital expenditures M USD  ......  Subscription required  ......  Subscription required
Sustaining costs M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 49   58.9  
Revenue M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 229.7  
Operating Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 2.2  
Subscription required - Subscription is required



Heavy Mobile Equipment as of December 31, 2017:
HME TypeModelSizeQuantityStatusLeased or
Contractor
Backhoe ....................... Subscription required 6.5 cu. m ....................... Subscription required Existing
....................... Subscription required ....................... Subscription required Proposed Leased
Dozer ....................... Subscription required Existing
Drill ....................... Subscription required ....................... Subscription required Existing
Drill ....................... Subscription required ....................... Subscription required Existing
Drill ....................... Subscription required ....................... Subscription required Existing
Drill ....................... Subscription required ....................... Subscription required Existing
Drill ....................... Subscription required ....................... Subscription required Existing
....................... Subscription required ....................... Subscription required ....................... Subscription required Proposed Leased
....................... Subscription required ....................... Subscription required Proposed Leased
Excavator ....................... Subscription required 10 cu. m ....................... Subscription required Existing
Excavator ....................... Subscription required 6.5 cu. m ....................... Subscription required Existing
Excavator ....................... Subscription required ....................... Subscription required Existing
Excavator ....................... Subscription required ....................... Subscription required Existing
Grader ....................... Subscription required Existing
....................... Subscription required ....................... Subscription required ....................... Subscription required Proposed Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Proposed Leased
Loader ....................... Subscription required Existing
....................... Subscription required ....................... Subscription required ....................... Subscription required Proposed Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Proposed Leased
....................... Subscription required ....................... Subscription required Proposed Leased
Truck (haul) 65 t ....................... Subscription required Existing
Truck (haul) ....................... Subscription required 90 t ....................... Subscription required Existing
Truck (haul) ....................... Subscription required ....................... Subscription required Existing
....................... Subscription required ....................... Subscription required Proposed Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Proposed Leased
Truck (water) 50 cu. m ....................... Subscription required Existing
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Apr 1, 2022
....................... Subscription required ....................... Subscription required Subscription required Apr 1, 2022
....................... Subscription required ....................... Subscription required Subscription required Apr 1, 2022
....................... Subscription required ....................... Subscription required Subscription required Apr 1, 2022
Subscription required - Subscription is required.

Staff:

EmployeesYear
Subscription required 2021
Subscription required 2020

Corporate Filings & Presentations:

DocumentYear
................................... 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
................................... Subscription required 2019
Annual Information Form 2018
Annual Information Form 2017
Pre-Feasibility Study Report 2017
Annual Information Form 2016
Annual Information Form 2015
Annual Information Form 2014
Technical Report 2013
Subscription required - Subscription is required.

Subscription required - Subscription is required.

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