Burkina Faso

Mana Mine

Click for more information

Categories

Overview

Mine TypeOpen Pit & Underground
Commodities
  • Gold
Mining Method
  • Truck & Shovel / Loader
  • Longitudinal retreat
  • Transverse open stoping
  • Longhole stoping
  • Avoca
Backfill type ... Lock
Production Start... Lock
Mine Life... Lock
ShapshotThe Mana operation is an open pit and underground mining operation with Maoula open pit and Siou and Wona underground mines.

The the Maoula open pit is expected reaches the end of its mine life during Q2-2024.

The focus since acquisition has been on increasing the mine life beyond 10 years, through the expansion of the underground deposits and evaluation of satellite open pit targets.

Owners

SourceSource
CompanyInterestOwnership
Government of Burkina Faso 10 % Indirect
Endeavour Mining plc 90 % Indirect
SEMAFO Burkina Faso S.A. (operator) 100 % Direct
Endeavour Mining’s mineral rights comprise of one mining exploitation permit (the ‘Mana Licence’). The Mana Licence is held by SEMAFO Burkina Faso SA (‘SEMAFO BF’). The Company 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

Lock

- 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, Wona, Nyafé, Fofina, Yaho and Siou, are hosted in different rock types. The lithostratigraphic succession is typical of greenstone belts and is characterised 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 characteristic of typical West African, shear-hosted orogenic gold deposits. The major sulphides associated with the gold mineralisation are pyrite and arsenopyrite. Free visible gold is encountered at the Wona and Siou deposits. Magnetite occurs as small millimetric prisms along schistosity planes in the walls of mineralised zones. The five major deposits of the Mana property are described herein.

The Wona deposit is hosted in a series of deformed sedimentary, volcano-sedimentary and metavolcanic rocks. The gold mineralisation has developed along a major northeast-southwest subvertical fault zone of regional extent. The shear zone is about 200 m wide in the Wona pit sector. The original stratigraphic sequence is a succession of pelitic sediments with graphitic horizons and volcanoclastics. They have been affected by a pervasive schistosity associated with vertical movements along the fault (the east block rising with respect to the west one) as well as sinistral lateral movements. Those foliated rocks are cut by mafic to intermediate dykes. The mineralisation appears to be associated with movement along the fault accompanied by hydrothermal fluid circulation and intense silicification.

The Nyafé and related Filon 67 deposits are hosted in a purely volcanic sequence of basalt and mafic tuffs. The original stratigraphic sequence is sub-horizontal and overturned, with pillow lava at the bottom, pillow breccias and finally massive lava at the top. Several subvertical decimetre scale dykes crosscut the volcanic sequence. The Filon 67 (F67) deposit, adjacent to Nyafé is composed of quartz veins associated to shear zones, with dextral motion within a package of greenschist rocks. These composite veins show textures indicative of several successive phases of mineralisation.

The Fofina deposit is divided into two sectors separated by a zone of volcaniclastic/mafic volcanic rocks. The western zones are located in a sheared sedimentary unit dipping moderately west and trending north-northeast. They are related to a rheological contact with a massive basalt unit to the east. The eastern zones are within the basaltic lavas and have similar characteristics to the Nyafé deposit.

The Yaho deposit is hosted in a wide north-striking and steeply west-dipping sandstone unit flanked by shales and siltstones to the west and basaltic flows to the east. The mineralisation is associated with silicified and sericitized corridors within the sandstone which also contain increased amounts of sulphides (pyrite and arsenopyrite).

The Siou deposit is a typical shear-hosted quartz vein deposit. The two principal zones are the Siou and No. 9 zones. The Siou zone is hosted in a single quartz vein located within the Siou Granitic Intrusive, but near the contact with sandstones and shales to the west. The No. 9 zone is located at the contact between the sediments and the Siou Intrusive and generally consists of quartz veining and veinlets intruding the granitic intrusive. Both the Siou and No. 9 zones are north-striking and moderately east-dipping.

Reserves

Lock

- subscription is required.

Mining Methods

Lock

- subscription is required.

Comminution

Crushers and Mills

Lock

- subscription is required.

Processing

Lock

- subscription is required.

Production

CommodityUnits2024202320222021202020192018201720162015
Gold koz  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe136181206240256
All production numbers are expressed as metal in doré. ^ Guidance / Forecast.

Operational metrics

Metrics202320222021202020192018201720162015
Daily processing capacity  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe8,000 t8,000 t8,000 t8,000 t8,000 t
Ore tonnes mined  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe1,437,400 t2,109,700 t2,268,100 t
Waste OP  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe9,253,800 t17,802,100 t16,913,100 t
Waste UG  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe
Tonnes processed  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe2,061,200 t2,573,900 t2,739,900 t2,753,300 t2,399,100 t
Daily ore mining rate  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe
Stripping / waste ratio  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe8.4 7.5
Daily mining capacity  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe110,000 t100,000 t

Production Costs

CommodityUnits20242023202220212020201920182017
Total cash costs (sold) Gold USD  ....  Subscribe 762 / oz   786 / oz   655 / oz  
Total cash costs (sold) Gold USD  ....  Subscribe  ....  Subscribe  ....  Subscribe
All-in sustaining costs (sold) Gold USD  ....  Subscribe 1,095 / oz   1,056 / oz   942 / oz  
All-in sustaining costs (sold) Gold USD  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe
^ Guidance / Forecast.
** Net of By-Product.

Operating Costs

Currency2023202220212020201920182017
OP mining costs ($/t mined) USD 4.68  6.45  3.74  3.57  
UG mining costs ($/t mined) USD  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe
Processing costs ($/t milled) USD  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe
G&A ($/t milled) USD  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe
Total operating costs ($/t milled) USD  ....  Subscribe  ....  Subscribe  ....  Subscribe

Financials

Units20242023202220212020201920182017
Capital expenditures (planned) M USD  ....  Subscribe
Sustaining costs M USD  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe 43.9   49   58.9  
Capital expenditures M USD  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe
Revenue M USD  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe 180   229.7  
Operating Income M USD  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe 16.8   2.2  

Heavy Mobile Equipment

Lock

- subscription is required.


AV - Autonomous

Personnel

Mine Management

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required May 6, 2024
....................... Subscription required ....................... Subscription required Subscription required May 6, 2024
....................... Subscription required ....................... Subscription required Subscription required May 6, 2024
....................... Subscription required ....................... Subscription required Subscription required May 1, 2024
....................... Subscription required ....................... Subscription required Subscription required May 1, 2024
....................... Subscription required ....................... Subscription required Subscription required May 6, 2024

EmployeesContractorsTotal WorkforceYear
...... Subscription required ...... Subscription required ...... Subscription required 2023
...... Subscription required ...... Subscription required ...... Subscription required 2022
...... Subscription required 2021
...... Subscription required 2020

Aerial view:

Lock

- subscription is required.