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Mali
Segala (Tabakoto) Mine

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 Location:
11 km N from Kenieba, Mali

  Regional Office:
Hamdallaye ACI 2000 Pres de l'Ex Collège Horizon , Immeuble Conseil Malien des Chargeurs, 2eme Etage
Bamako
Mali
BPE 2800
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  • Overview
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  • Filings & News

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Overview

StageProduction
Mine TypeOpen Pit & Underground
Commodities
  • Gold
Mining Method
  • Truck & Shovel / Loader
  • Longhole stoping
  • Cemented backfill
Production Start...
Mine Life5 years (as of Jan 1, 2021)
On December 24, 2018, 80% interest in the Tabakoto Mine was purchased by Nguvu Holdings Limited (formerly known as BCM Investments Limited).

Production reports have not been publicly available since then.


Owners

Source: p. 1
CompanyInterestOwnership
Government of Mali 20 % Indirect
Nguvu Holdings Ltd. 80 % Indirect
Ségala Mining Corporation S.A. 100 % Direct
On December 24, 2018, Endeavour Mining completed the sale of its interest in the non-core Tabakoto mine to Algom Resources Limited, a subsidiary of Nguvu Holdings Limited (formerly known as BCM Investments Limited), as previously announced on September 4, 2018.

The share capital is 80% owned by Nguvu Holdings Ltd. and 20% by the Republic of Mali.

The mine operates in two permits: Segala Mining Cooperation (SEMICO) and Mines de Kofi (MIKO). Semico permit has one open-pit (Fougala) and two underground mines (Tabakoto and Segala) in operation. Miko permit has two operating open-pit mines (Baboto and Betea).

As part of the development of the deposits of the MIKO SA permit, the Nguvu Holdings group majority shareholder of MIKO SA and SEMICO SA has entrusted to Semico SA the processing of ore extracted from MIKO deposits.

Contractors

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Deposit Type

  • Vein / narrow vein
  • Orogenic


Summary:

The gold deposits of the Tabakoto project are dominantly hosted in the Birimian, turbiditic sedimentary rocks of the Kofi Formation. These rocks have been intruded by multiple generations of dikes and sills ranging from felsic to mafic composition. The entire package of rocks have been deformed and metamorphosed during the Eburnean orogeny. While individual structures associated each of the deformational events can host mineable deposits, multiple generations of structure enhances the probability of mineable ore.

The deposits can be further divided into three broad types as follows:
- Shear Zone hosted (Ségala and Ségala NW);
- Fracture and cross structure hosted (Dar Salam, Tabakoto, Dioulafoundou and Kofi C), and;
- Intrusive hosted (Djambaye II).

SHEAR ZONE HOSTED DEPOSITS
The Ségala and Ségala NW deposits are considered to be part of a structurally controlled alteration and mineralization system that is hosted by the core of an isoclinal anticline whose axial trace trends ESE (approx. 110°) and dips steeply to the south at approximately -80°. The anticline is made up of somewhat deformed and altered meta-sediments (greywacke and argillite) that display variable intensities of alteration of chlorite, carbonate, sericite, sulphide and silica. A series of quartz stringers and veins intrude this package.

BRITTLE FRACTURE ZONE HOSTED DEPOSITS
At the Dar Salam, Tabakoto and Dioulafoundou and Kofi C Deposits, a geologica ........


Mining Methods

  • Truck & Shovel / Loader
  • Longhole stoping
  • Cemented backfill


Summary:

Production comes from both underground and open pits:
– Tabakoto Underground;
– Segala Underground;
– Kofi B Open Pit;
– Tabakoto North Open Pit.

Mining activity is by owner mining.

There are five veins being exploited by means of underground mining methods. These are:
- The Ségala Main Zone, where transverse long hole stoping is preferred and either cemented rock fill (“CRF”) or unconsolidated rock fill is utilized to enhance local and overall ground stability;
- The Ségala Footwall Zone, where longitudinal long-hole stoping is the design together with cemented rock fill or unconsolidated rock fill;
- The Tabakoto North West veins where there are more than five closely spaced veins. Selective longitudinal long-hole stoping is used to extract ore from the top down without using fill;
- The Tabakoto North East veins where two main veins are separated by about 10m and long hole stoping is also used to extract ore from the top down without fill, and;
- The Tabakoto South vein, which is relatively long and narrow with better grades. Long-hole stoping moves from the bottom upwards as opposed to a top down approach. Waste fill is also used in this instance.

Mining – Segala Underground
- Ségala is at full production producing just over 40ktpm from underground.
- One access portal, and two ventilation portals near the bottom of Segala open pit. Decline access is from a portal located 25 m a ........


Crushing and Grinding
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Processing

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Summary:

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Production:

CommodityUnits202020192018201720162015
Gold koz  ......  Subscription required  ......  Subscription required115144163151
All production numbers are expressed as metal in doré.
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Operational Metrics:

Metrics20182017201620152014
Total tonnes mined 5,352 kt7,397 kt8,399 kt10,658 kt
Ore tonnes mined 1,173 kt1,403 kt1,593 kt1,371 kt1,445 kt
Waste 3,996 kt5,753 kt6,449 kt8,787 kt
Tonnes milled 1,714 kt1,640 kt1,588 kt1,588 kt1,485 kt
Stripping / waste ratio 6.98 8.89 9.94 17.2
Daily processing capacity 4,000 t4,000 t4,000 t
Annual processing rate 1.4 Mt1.4 Mt

Reserves at December 31, 2021:

CategoryTonnage CommodityGradeContained Metal
Proven 4.53 Mt Gold 2.67 g/t 389,130 oz
Probable 3.453 Mt Gold 2.2 g/t 256,624 oz
Proven & Probable 7.983 Mt Gold 2.45 g/t 645,754 oz

Commodity Production Costs:

CommodityUnits201820172016
Cash costs (sold) Gold USD 1,055 / oz   929 / oz   821 / oz  
All-in sustaining costs (sold) Gold USD 1,369 / oz   1,148 / oz   1,027 / oz  

Operating Costs:

Units2018201720162015
OP mining costs ($/t mined) USD 3.73.463.62.79
UG mining costs ($/t mined) USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Processing costs ($/t milled) USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
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Financials:

Units201820172016
Sustaining costs M USD 20.8   21.2  
Revenue M USD 142.8   181.4   200.4  
Operating Income M USD -24.3   -12.7   27.3  
After-tax Income M USD -174   6.8  



Heavy Mobile Equipment as of November 1, 2017:
HME TypeModelQuantity
Dozer (crawler) ....................... Subscription required ....................... Subscription required
Dozer (crawler) ....................... Subscription required ....................... Subscription required
Drill (long hole) ....................... Subscription required ....................... Subscription required
Excavator ....................... Subscription required ....................... Subscription required
Excavator ....................... Subscription required ....................... Subscription required
Excavator ....................... Subscription required ....................... Subscription required
Excavator ....................... Subscription required ....................... Subscription required
Grader ....................... Subscription required ....................... Subscription required
Grader ....................... Subscription required ....................... Subscription required
Jumbo ....................... Subscription required ....................... Subscription required
Loader ....................... Subscription required ....................... Subscription required
Loader ....................... Subscription required ....................... Subscription required
Loader ....................... Subscription required ....................... Subscription required
Loader ....................... Subscription required ....................... Subscription required
Loader ....................... Subscription required ....................... Subscription required
Loader ....................... Subscription required ....................... Subscription required
Truck (dump) ....................... Subscription required ....................... Subscription required
Truck (haul) ....................... Subscription required ....................... Subscription required
Truck (water) ....................... Subscription required ....................... Subscription required
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Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Feb 7, 2023
....................... Subscription required ....................... Subscription required Subscription required Feb 7, 2023
....................... Subscription required ....................... Subscription required Subscription required Feb 7, 2023
....................... Subscription required ....................... Subscription required Subscription required Feb 7, 2023
....................... Subscription required ....................... Subscription required Subscription required Feb 7, 2023
....................... Subscription required ....................... Subscription required Subscription required Feb 7, 2023
....................... Subscription required ....................... Subscription required Subscription required Feb 7, 2023
....................... Subscription required ....................... Subscription required Subscription required Feb 7, 2023
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Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2020
................................... Subscription required 2019
Corporate Presentation 2018
Corporate Presentation 2018
Management Discussion & Analysis 2018
Press Release 2018
Press Release 2018
Annual Report 2017
Corporate Presentation 2017
Corporate Presentation 2017
Annual Report 2016
Management Discussion & Analysis 2015
Other 2015
Technical Report 2015
Annual Report 2014
Technical Report 2013
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