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Mali
Sadiola Mine

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 Location:
67 km SW from Kayes, Mali

  Address:
Hamdallaye ACI 2000
Bamako
Mali
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Fax(223)44-98-04-18
WebsiteWeb
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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
Commodities
  • Gold
Mining Method
  • Truck & Shovel / Loader
Production Start...
Mine Life2042
In 2021, Allied purchased an 80% stake in SEMOS (the entity that owns Sadiola Mine) from IAMGOLD Corporation and AngloGold Ashanti Limited.

Upon acquisition, the Sadiola Mine site was preparing for closure after more than two decades of operation. Mining activity had ceased in 2018 and the Mining Convention was due to lapse. In 2021 mining was restarted and the Mining Convention was extended for 20 years.


Owners

Source: p. 9
CompanyInterestOwnership
Government of Mali 20 % Indirect
Allied Gold Corp. 80 % Indirect
In 2021, Allied Gold Corp. Ltd purchased an 80% stake in SEMOS (the entity that owns Sadiola) from IAMGOLD Corporation and AngloGold Ashanti Limited. The balance of ownership is held by the Republic of Mali (20%).

Contractors

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Deposit Type

  • Orogenic
  • Mesothermal


Summary:

The Property covers a sedimentary package belonging to the Kofi Formation, which comprises argillaceousbanded carbonates and an overlying suite of arkose or greywacke where the variable content of feldspar grains is the most abundant detrital mineral rather than quartz or lithic fragments. Irrespective, both lithologies may be mineralised.

The Sadiola deposits are hosted in the Kofi Formation on the northern portion of the Kédougou-Kéniéba Inlier, on the eastern side of the SMSZ. The Kofi Formation comprises impure limestones, sandstones, black shales, pelites and greywackes as well as minor felsic to intermediate hypabyssal intrusions intruded as numerous felsic to intermediate dykes and stocks. Southwest of the main Sadiola deposit, the Kofi Formation is capped by intermediate to mafic diorites. Seven kilometres east of the Main pit, the carbonate sequence is overlain by sandstones of the Neoproterozoic Taoudeni basin that form a prominent escarpment along the strike of the inlier.

Mineralisation
Currently known gold mineralisation within the Sadiola Exploitation Permit is hosted within two major trends, the Sadiola trend in the west of the permit area and the Farabakouta East (known locally as “FE”) trend in the east.

On the Sadiola trend, gold mineralisation is associated with the north-striking Sadiola Fracture Zone (SFZ) that exploits the faulted contact between the greywacke to the west and the carbonate on the east along a 4 km st ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

Sadiola ceased mining operations in March 2018 with processing of low-grade stockpiles continuing into 2021. Mining recommenced in 2021 with the mining of oxide ore from Tambali and Sadiola Main.

Currently Sadiola consists of two open pit mines, Sadiola Main and FE3, which continue to mine oxide and transitional ore to feed the existing oxide processing facility at a rate of 5.0 Mt/a. The Tambali Mineral Reserve was mined out in 2022. Mining will expand to 10 Mt/a when the processing of primary ore commences in Q1 2026.

Mining of FE3 North will be complete in 2025 and the open pit will be used to store tailings material from the new plant until 2028. FE3 South and FE4 can receive tailings material from 2029.

Mining of the Sadiola Main and FE3 Mineral Reserves will be carried out conventional open pit extraction methods until 2038, after which low-grade stockpiles will be treated until 2041. Mining will use 300-tonne class excavators and 91-tonne class haul equipment for mining of oxide ore and the continued mining of primary ore. Studies show that there is no material upside benefit realized by using larger equipment.

A mining contractor has been contracted for the oxide mining and current contractor rates are applied to the mining of most of the pit stages apart from the deeper Sadiola Main Stages 12 and 13. Contractor budget costs were applied for mining of the primary orebodies. Allied has considered owner mining but concluded th ........


Crushing and Grinding
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Processing

Flow Sheet: Subscription required

Summary:

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Production:

CommodityUnits202220212019201820172016
Gold koz  ......  Subscription required  ......  Subscription required  ......  Subscription required144154171
All production numbers are expressed as metal in doré.
Subscription required - Subscription is required.

Operational Metrics:

Metrics20222021201920182017
Plant annual capacity  ......  Subscription required4.9 Mt4.9 Mt
Ore tonnes mined  ......  Subscription required  ......  Subscription required
Waste  ......  Subscription required  ......  Subscription required
Tonnes milled  ......  Subscription required  ......  Subscription required4,773 kt5,183 kt5,029 kt
Total tonnes mined  ......  Subscription required  ......  Subscription required2,766 kt13,156 kt
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Reserves at December 31, 2022:
The cut-off grades used for Mineral Reserves reporting were informed by a $1,500/oz gold price and vary from 0.31 to 0.73 g/t Au for different ore types due to differences in recoveries, costs for ore processing and ore haulage.

The Sadiola Mineral Resource Estimate is listed at 0.5 g/t Au cut-off grade, constrained within an $1,800/oz pit shell and depleted to December 31, 2022.

CategoryTonnage CommodityGradeContained Metal
Proven 13,138 kt Gold 0.91 g/t 384 koz
Probable 136,363 kt Gold 1.57 g/t 6,866 koz
Proven & Probable 149,501 kt Gold 1.51 g/t 7,250 koz
Measured 13,236 kt Gold 0.91 g/t 385 koz
Indicated 202,275 kt Gold 1.54 g/t 10,042 koz
Measured & Indicated 215,511 kt Gold 1.5 g/t 10,427 koz
Inferred 12,040 kt Gold 1.15 g/t 446 koz

Commodity Production Costs:

CommodityUnits20222021201920182017
Total cash costs (sold) Gold USD  ......  Subscription required  ......  Subscription required
Total cash costs Gold USD  ......  Subscription required 938 / oz†   900 / oz†  
All-in sustaining costs (sold) Gold USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 990 / oz†   1,019 / oz†  
† Net of By-Product.
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Operating Costs:

Units20222021
OP mining costs ($/t mined) USD 2.75  3.03  
Processing costs ($/t milled) USD  ......  Subscription required  ......  Subscription required
G&A ($/t milled) USD  ......  Subscription required  ......  Subscription required
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Financials:

Units202220212016
Sustaining costs M USD  ......  Subscription required  ......  Subscription required
Capital expenditures M USD  ......  Subscription required  ......  Subscription required 17.1  
Revenue M USD  ......  Subscription required  ......  Subscription required
Gross profit M USD  ......  Subscription required  ......  Subscription required
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Pipelines and Water Supply
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Heavy Mobile Equipment as of June 12, 2023:
HME TypeModelSizeQuantityStatusLeased or
Contractor
Dozer (crawler) ....................... Subscription required ....................... Subscription required Existing Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Proposed Leased
Drill (blasthole) ....................... Subscription required ....................... Subscription required Existing Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Proposed Leased
Excavator ....................... Subscription required ....................... Subscription required Existing Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Proposed Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Proposed Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Proposed Leased
Grader ....................... Subscription required ....................... Subscription required Existing Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Proposed Leased
Loader (FEL) ....................... Subscription required ....................... Subscription required Existing Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Proposed Leased
Truck (haul) ....................... Subscription required 91 t ....................... Subscription required Existing Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Proposed Leased
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Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Sep 6, 2023
....................... Subscription required ....................... Subscription required Subscription required Sep 6, 2023
....................... Subscription required ....................... Subscription required Subscription required Sep 6, 2023
....................... Subscription required ....................... Subscription required Subscription required Sep 6, 2023
....................... Subscription required ....................... Subscription required Subscription required Sep 6, 2023
....................... Subscription required ....................... Subscription required Subscription required Sep 6, 2023
Subscription required - Subscription is required.

Staff:

EmployeesContractorsTotal WorkforceYear
Subscription required Subscription required Subscription required 2022
Subscription required Subscription required Subscription required 2021
Subscription required Subscription required Subscription required 2018
Subscription required Subscription required Subscription required 2017
Subscription required Subscription required Subscription required 2016
Subscription required Subscription required Subscription required 2015
Subscription required Subscription required Subscription required 2014

Corporate Filings & Presentations:

DocumentYear
Corporate Presentation 2023
Press Release 2023
Press Release 2023
Technical Report 2023
Annual Information Form 2022
Financial Review 2022
Management Discussion & Analysis 2022
Sustainability Report 2022
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
Fact Sheet 2018
Integrated Report 2018
Management Discussion & Analysis 2018
Year-end Mineral Reserves 2018
Year-end Mineral Reserves 2018
Annual Report 2017
Annual Report 2017
Management Discussion & Analysis 2017
Year-end Mineral Reserves 2017
Management Discussion & Analysis 2016
Other 2016
Press Release 2016
Year-end Mineral Reserves 2016
Annual Report 2015
Year-end Mineral Reserves 2015
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