• Data Access
  • Your Email  
  • Your Email  
Keep me signed in.
Forgot your password?
Close
  • Forgot Your Password?
  • Enter the email you signed up with and we'll email it to you.
  • Your Email  
Close
Back
MDO
Mining Data Solutions
  • Home
  • Database
  • Subscribe
  • Sign In
  • Sign In
Mali
Sadiola Mine

This page is not tailored to
devices with screen width under 750 px.
 Location:
67 km SW from Kayes, Mali

  Regional Office:
Hamdallaye ACI 2000
Bamako
Mali
Phone  ...  Subscription required
WebsiteWeb
Additional Resources for Suppliers & Investors
Drill results over 30 g/t Au
Stay on top of recent discoveries.
Search drill results by commodity and grade.
Largest mines in the Americas
Mining and mill throughput capaciites.
Full profiles of select mines and projects.
Deepest underground mines
Shaft depth and mill throughput data.
Full profiles of select mines and projects.
Heavy mobile equipment
HME type, model, size and quantity.
Full profiles of select mines and projects.
Permitting and construction projects
Projects at the permitting or construction stage. Full profiles of select projects.
Mines with remote camps
Camp size, mine location and contacts.
Full profiles of select mines and projects.
Mines & projects in Mali
A list of country's mines and projects.
Full profiles of select mines and projects.
  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Personnel
  • Filings & News

Thank you for browsing through mine profiles compiled by the Mining Data Online team.

Would you like to subcribe or schedule a Demo?
  • Name:
     
  • Company:
     
  • Position:
     
  • Phone:
  • Email:
  • Message:

Overview

StatusClosing / Closed
Mine TypeOpen Pit
Commodities
  • Gold
Mining Method
  • Truck & Shovel / Loader
Processing
  • Gravity separation
  • Concentrate leach
  • Agitated tank (VAT) leaching
  • Carbon in pulp (CIP)
  • AARL elution
  • Solvent Extraction & Electrowinning
  • Cyanide (reagent)
Mine Life2019
Processing of ore stockpile expected to end mid-2019.
Should an agreement not be reached with the Government of Mali, the operation will be placed on suspended operations.
Latest NewsIAMGOLD Completes Sale of Its Interest in the Sadiola Gold Mine     December 30, 2020


Owners

Source:
CompanyInterestOwnership
Government of Mali 20 % Indirect
Allied Gold Corp. 80 % Indirect
Societe D'exploitation Des Mines D'or De Sadiola S.A. 100 % Direct
December 30, 2020 - IAMGOLD Corporation (TSX: IMG) (NYSE: IAG) ("IAMGOLD" or the "Company") announces that the Company, together with joint venture partner, AngloGold Ashanti Limited ("AGA"), have completed the previously announced sale (see news release dated December 23, 2019) of our collective interests in Société d'Exploitation des Mines d'Or de Sadiola S.A. ("SEMOS") to Allied Gold Corp ("Allied Gold") (the "Transaction"). SEMOS' principal asset is the Sadiola Gold Mine, located in the Kayes region of Western Mali.

Prior to the completion of the Transaction, IAMGOLD and AGA each held a 41% interest in SEMOS with the remaining 18% interest held by the Republic of Mali. Pursuant to the Transaction and immediately prior to Completion, the Republic of Mali acquired a further 2% interest in SEMOS (1% each from IAMGOLD and AGA) (the "Republic Transaction"). Consequently, upon Completion, IAMGOLD and AGA each sold a 40% interest in SEMOS to Allied Gold.

Deposit Type

  • Orogenic
  • Mesothermal


Summary:

The Sadiola deposit is considered a mesothermal shear-hosted gold deposit and can be correlated with an Ashanti-type orogenic gold model.

The Sadiola gold deposits are located within the Malian portion of the Keniéba-Kedougou Inlier, a major early Paleoproterozoic Birimian window along the north-east margin of the Kenema-Man shield. The deposits are in the north of the inlier and positioned in the Kofi formation, just east of the Senegalo-Malian Shear Zone terrane boundary. Regional metamorphism is to greenschist facies with amphibolite facies metamorphism observed in the contact aureoles around major intrusions.

The Sadiola gold system displays the Sadiola Hill-style Au-As-Sb mineralisation. Within the Sadiola Main Pit the bulk of the ore is hosted within the brittle-ductile Sadiola Fracture Zone and impure footwall carbonates. Mineralisation also occurs along the array of NNE-trending shears although gold grade decreases with increasing distance from the Sadiola Fracture Zone.

Mineralisation is shear-hosted and associated with a polyphase hydrothermal alteration history comprising an early calc-silicate phase followed by a potassic alteration stage. The metal associations of the ore typically comprise As-Au Sb and minor to trace amounts of Cu-W-Mo-Ag-Bi Zn-Pb-Te-Fe-bearing mineral species.

The geometry of the extensive, soft, oxide deposit and its supergene enrichment of gold relates almost exclusively to the weathering history of the primary mineralisation. Intense tropical weathering has produced deep troughs of white to grey, decarbonated, kaolinrich saprolite, locally abundant nontronite and relative gold enrichment. Penetration of groundwater has caused oxidation of the primary sulphides and the formation of sulphuric acid, further promoting deeper argillisation of the bedrock.

Drilling of the (unweathered) primary mineralisation has allowed detailed investigation of major and minor hydrothermal alteration processes that were active during the formation of the deposit. Primary gold is extremely fine grained, dominantly less than 15µm, with rare grains approaching 50µm. Visible gold is rare.

The gold mineralisation in the Sadiola main pit is related to the interaction of the north striking Sadiola Fracture Zone (SFZ) and a northnortheast-striking fault array. The SFZ follows the competency contrast between the brittle hangingwall greywacke and the ductile footwall marbles and is mineralised over a drilled strike length of approximately 2,500km. The stratigraphy is intruded by discontinuous diorite and quartz-feldspar porphyry dykes. Mineralisation occurs in all four rock types although most of the mineralisation is hosted in the footwall adjacent to the SFZ. The deposit has been intensely weathered to a maximum depth of 200m.


Mining Methods

  • Truck & Shovel / Loader


Summary:

Current operations are focused on the mining of oxide material from the FN pits, north of the Sadiola main pit, which is supplemented with the low/marginal grade ore from the stockpiles. Mining from the Sadiola main pit has stopped as the oxide Ore Reserve is depleted although this pit remains a key project in the extension of the life of mine plan with the Sadiola Sulphide Project (SSP) awaiting board approval.


Crushing and Grinding


Processing

  • Gravity separation
  • Concentrate leach
  • Agitated tank (VAT) leaching
  • Carbon in pulp (CIP)
  • AARL elution
  • Solvent Extraction & Electrowinning
  • Cyanide (reagent)

Source: Subscription required

Summary:

Gold processing uses the conventional plant consisting of crushing, milling, leach adsorption and elution. The elution uses AARL process. The plant consists of two twin streams capable to process soft oxide and soft sulphide with a limited amount of hard component.

There are two primary mills receiving fresh ore from the ore reception by conveyor belt transportation. The primary mills can run on open or close circuit. The mills are running in open circuit when the underflow of the primary mill cyclones feeds the regrind mill. But when the cyclone underflow returns back into the mill, thus the mill is on close circuit.

A gravity plant installed since December 2008 consists of a screening facility, a falcon concentrator and a Gekko unit used for intensive cyanidation in the leach reactor. A second falcon concentrator installed in 2010 is used in conjunction with the first falcon to extract coarse gold which is fed into the Gekko unit. The pregnant solution from t ........

Recoveries & Grades:

CommodityParameter201920182017201620152014
Gold Recovery Rate, %  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Gold Head Grade, g/t 0.890.890.961.151.11.28
Subscription required - Subscription is required.

Production:

CommodityUnits201920182017201620152014
Gold koz  ......  Subscription required  ......  Subscription required154171168205
All production numbers are expressed as metal in doré.
Subscription required - Subscription is required.

Operational Metrics:

Metrics201920182017201620152014
Tonnes milled  ......  Subscription required  ......  Subscription required  ......  Subscription required4.91 Mt5.06 Mt5.1 Mt
Total tonnes mined  ......  Subscription required  ......  Subscription required  ......  Subscription required12,775 kt15,583 kt
Plant annual capacity  ......  Subscription required  ......  Subscription required  ......  Subscription required4.9 Mt4.8 Mt
Subscription required - Subscription is required.

Reserves at December 31, 2019:

CategoryTonnage CommodityGradeContained Metal
Proven & Probable 59,751 kt Gold 2 g/t 3,860 koz
Indicated 113,725 kt Gold 1.9 g/t 6,793 koz
Inferred 17,642 kt Gold 1.7 g/t 956 koz

Commodity Production Costs:

CommodityUnits201920182017201620152014
Total cash costs Gold USD  ......  Subscription required  ......  Subscription required 900 / oz 991 / oz 818 / oz 1,028 / oz
All-in sustaining costs (sold) Gold USD  ......  Subscription required  ......  Subscription required 1,019 / oz 1,066 / oz 886 / oz 1,133 / oz
Subscription required - Subscription is required.

Financials:

Units201620152014
Capital expenditures M USD  ......  Subscription required 4.9   14.6  


Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required May 23, 2019
Subscription required - Subscription is required.

Staff:

EmployeesContractorsTotal WorkforceYear
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
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2018
................................... Subscription required 2018
................................... Subscription required 2018
................................... Subscription required 2018
................................... Subscription required 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
Subscription required - Subscription is required.

News:

NewsDate
IAMGOLD Completes Sale of Its Interest in the Sadiola Gold Mine December 30, 2020
IAMGOLD Agrees to Sell Its Interest in the Sadiola Gold Mine December 23, 2019

Aerial view:

Subscription required - Subscription is required.

Terms of Use Privacy Policy © 2020 MDO Data Online Inc.