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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
  • Backfill
Production Start...
Mine Life11 years (as of Jan 1, 2022)
Mana mine was acquired by Endeavour in July 2020 and the focus ever since has been on increasing the mine life to more than ten years, through the expansion of the underground deposits and evaluating local open pit targets.

Owners

Source: p. 50
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

Subscription required - Subscription is required.

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
  • Backfill

Summary:

Two mining methods are employed at the Mana Mine, namely open pit and underground.

UNDERGROUND MINING AT SIOU
Longitudinal sublevel retreat and transverse open stope long-hole mining methods were selected for Siou underground due to the inclination of mineralised lenses and varying widths associated with wide stockwork ore zones. Stopes are designed with suitable allowances for ore recovery and dilution. Transverse open stoping is the main mining method and Cemented Rock Fill (CRF) is used to ensure safe ore recovery from secondary transverse stopes. Waste rock backfill is used in secondary stopes in all levels other than sill levels (5070 and 4995). Large sill pillars have been left in the first horizon under 5070 level and the second horizon under 4995 level. In 2022, the mine commenced with planning the extraction of a number of these sill pillar stopes. The extraction strategy includes a mining sequence that follows Geotechnical recommendations, an assessment of the regional stability in terms of stress re-distribution and a sound void management strategy in terms of the mining sequence and monitoring of the stability of the undercut backfill on the upper levels. These assessments and strategies will be concluded in 2023 prior to the extraction of the first undercut stope.

WSP-Golder was retained to undertake the geotechnical and hydrogeological analysis of the underground project at Siou, including stope dimension, ground support and crown pi ........

Crushing and Grinding
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Processing

Flow Sheet: Subscription required

Summary:

- subscription is required.

Production:

CommodityUnits2023202220212020201920182017
Gold koz  ......  Subscription required ^  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required181206
All production numbers are expressed as metal in doré. ^ Guidance / Forecast.
Subscription required - Subscription is required.

Operational Metrics:

Metrics202220212020201920182017
Daily processing capacity  ......  Subscription required  ......  Subscription required8,000 t8,000 t8,000 t8,000 t
Ore tonnes mined  ......  Subscription required  ......  Subscription required2,216 kt1,437,400 t2,109,700 t2,268,100 t
Waste OP  ......  Subscription required  ......  Subscription required14,742 kt9,253,800 t17,802,100 t16,913,100 t
Waste UG  ......  Subscription required  ......  Subscription required281 kt
Total tonnes mined  ......  Subscription required  ......  Subscription required25.6 Mt
Tonnes processed  ......  Subscription required  ......  Subscription required2,433 kt2,061,200 t2,573,900 t2,739,900 t
Daily ore mining rate  ......  Subscription required  ......  Subscription required7,000 t
Stripping / waste ratio  ......  Subscription required  ......  Subscription required8.4 7.5
Daily mining capacity  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required.

Reserves at December 31, 2022:
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: Mana OP: Not Applicable. Mana UG: Siou cut-off grade: 2.35g/t Au; Wona cut-off grade: 2.23g/t Au.

CategoryTonnage CommodityGradeContained Metal
Proven Mt Gold 1.85 g/t 1 koz
Probable 8.3 Mt Gold 3.19 g/t 852 koz
Proven & Probable 8.3 Mt Gold 3.19 g/t 852 koz
Measured 7.8 Mt Gold 1.83 g/t 460 koz
Indicated 26.1 Mt Gold 2.04 g/t 1,718 koz
Measured & Indicated 34 Mt Gold 1.99 g/t 2,177 koz
Inferred 2.9 Mt Gold 3.48 g/t 326 koz

Commodity Production Costs:

CommodityUnits2023202220212020201920182017
Total cash costs (sold) Gold USD  ......  Subscription required  ......  Subscription required 786 / oz   655 / oz  
Total cash costs (sold) Gold USD  ......  Subscription required  ......  Subscription required
All-in sustaining costs (sold) Gold USD  ......  Subscription required  ......  Subscription required 1,056 / oz   942 / oz  
All-in sustaining costs (sold) Gold USD  ......  Subscription required  ......  Subscription required  ......  Subscription required
^ Guidance / Forecast.
† Net of By-Product.
Subscription required - Subscription is required.

Operating Costs:

Units202220212020201920182017
OP mining costs ($/t mined) USD 6.45  3.74  3.57  
UG mining costs ($/t mined) USD  ......  Subscription required  ......  Subscription required  ......  Subscription required
Processing costs ($/t milled) USD  ......  Subscription required  ......  Subscription required  ......  Subscription required
G&A ($/t milled) USD  ......  Subscription required  ......  Subscription required  ......  Subscription required
Total operating costs ($/t milled) USD  ......  Subscription required  ......  Subscription required  ......  Subscription required
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Financials:

Units2023202220212020201920182017
Capital expenditures (planned) M USD  ......  Subscription required
Sustaining costs M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 49   58.9  
Capital expenditures M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required
Revenue M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 229.7  
Operating Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 2.2  
Subscription required - Subscription is required

Pipelines and Water Supply
Source: Subscription required

- subscription is required.

Heavy Mobile Equipment:
HME TypeModelSizeQuantityStatusLeased or
Contractor		Ref. Date
Backhoe ....................... Subscription required 6.5 cu. m ....................... Subscription required Existing Dec 31, 2017
....................... Subscription required ....................... Subscription required Proposed Leased Dec 31, 2017
Dozer ....................... Subscription required Existing Dec 31, 2017
Drill ....................... Subscription required ....................... Subscription required Existing Dec 31, 2017
Drill ....................... Subscription required ....................... Subscription required Existing Dec 31, 2017
Drill ....................... Subscription required ....................... Subscription required Existing Dec 31, 2017
Drill ....................... Subscription required ....................... Subscription required Existing Dec 31, 2017
Drill ....................... Subscription required ....................... Subscription required Existing Dec 31, 2017
....................... Subscription required ....................... Subscription required ....................... Subscription required Proposed Leased Dec 31, 2017
....................... Subscription required ....................... Subscription required Proposed Leased Dec 31, 2017
Excavator ....................... Subscription required 10 cu. m ....................... Subscription required Existing Dec 31, 2017
Excavator ....................... Subscription required 6.5 cu. m ....................... Subscription required Existing Dec 31, 2017
Excavator ....................... Subscription required ....................... Subscription required Existing Dec 31, 2017
Excavator ....................... Subscription required ....................... Subscription required Existing Dec 31, 2017
Grader ....................... Subscription required Existing Dec 31, 2017
....................... Subscription required ....................... Subscription required ....................... Subscription required Proposed Leased Dec 31, 2017
....................... Subscription required ....................... Subscription required ....................... Subscription required Proposed Leased Dec 31, 2017
Loader ....................... Subscription required Existing Dec 31, 2017
....................... Subscription required ....................... Subscription required ....................... Subscription required Proposed Leased Dec 31, 2017
Scoop Tram ....................... Subscription required ....................... Subscription required Existing Leased Apr 1, 2020
....................... Subscription required ....................... Subscription required Proposed Leased Dec 31, 2017
Truck (haul) 65 t ....................... Subscription required Existing Dec 31, 2017
Truck (haul) ....................... Subscription required 90 t ....................... Subscription required Existing Dec 31, 2017
Truck (haul) ....................... Subscription required ....................... Subscription required Existing Dec 31, 2017
....................... Subscription required ....................... Subscription required Proposed Leased Dec 31, 2017
....................... Subscription required ....................... Subscription required ....................... Subscription required Proposed Leased Dec 31, 2017
Truck (water) 50 cu. m ....................... Subscription required Existing Dec 31, 2017
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Jul 10, 2023
....................... Subscription required ....................... Subscription required Subscription required Jul 10, 2023
....................... Subscription required ....................... Subscription required Subscription required Jul 10, 2023
....................... Subscription required ....................... Subscription required Subscription required Jul 19, 2023
....................... Subscription required ....................... Subscription required Subscription required Jul 10, 2023
Subscription required - Subscription is required.

Staff:

EmployeesContractorsTotal WorkforceYear
Subscription required Subscription required Subscription required 2022
Subscription required 2021
Subscription required 2020

Corporate Filings & Presentations:

DocumentYear
Corporate Presentation 2023
Corporate Presentation 2023
Annual Information Form 2022
Annual Report 2022
Financial Review 2022
Management Discussion & Analysis 2022
Other 2022
Sustainability Report 2022
................................... 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
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