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Senegal
Boto Project

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 Location:
88 km E from Kedougou, Senegal
  Project Contacts:
Route des Almadies, Zone 9, Villa 20
Dakar
Senegal
Phone  ...  Subscription required
Fax+(221) 33-820-3283
WebsiteWeb
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Fleet
  • Personnel
  • Filings & News
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Overview

StageConstruction
Mine TypeOpen Pit
Commodities
  • Gold
Mining Method
  • Truck & Shovel / Loader
Mine Life10.7 years (as of Jan 1, 2020)
The Boto Gold Project is a shovel ready development project. The project is located on an exploitation permit granted in late 2019 for an initial 20-year period.

The 2022 scope of work included the completion of preliminary works started in 2021 (works package for the completion of a road to provide permanent access to the site, engineering for critical plant equipment). During the fourth quarter 2022, the on-site hydrogeological study to further understand and model water flow was completed, for which the final report is expected in early 2023.

As at December 31, 2022, the Boto Gold project met the criteria to be classified as held for sale.

Owners

Source: p. 136
CompanyInterestOwnership
IAMGOLD Corp. 90 % Indirect
The IAMGOLD has several mineral rights in the Boto Gold Project mining lease held indirectly by its subsidiary, IAMGOLD Boto SA. IAMGOLD owns a 90% interest in IAMGOLD Boto SA., while the Government of Senegal has a 10% free-carried interest.

Contractors

Subscription required - Subscription is required.

Deposit Type

  • Vein / narrow vein
  • Orogenic

Summary:

The Project consists of four (4) deposits, Malikoundi/Boto 2, Boto 5, Boto 4 and Boto 6, all of the late orogenic type.

Boto can be divided into three north trending litho-structural domains (020° N) that are well delineated in both induced polarization (IP) and magnetic surveys. From west to east, the three domains are:
• Western Flyschoid Domain.
• Central Deformation Corridor.
• Eastern Siliciclastic Domain.

Malikoundi/Boto2, Boto 4, and Boto 6.
At Malikoundi/Boto 2, Boto 4 and Boto 6, the regolith is composed of pedolith (soil, ferricrete, and laterite), saprolite, and transition weathering profiles (saprock) that average 8 m, 20 m, and 10 m in thickness, respectively. The detailed study of regolith has made it possible to distinguish between transported and in-situ regolith. The assay results from up-dip expressions of mineralized zones, confirm in-situ mineralized regolith. Mineralization in fresh rock is mainly associated with pervasive albite alteration and pyrite.

Interpretation of structural data collected from oriented drill core has shown differences between Malikoundi/Boto 2, Boto 4, and Boto 6. Boto 6 is characterized by a bedding strike of 025° N, whereas Malikoundi/Boto 2 appears to have two bedding strike directions of 015° N and 030° N. The two bedding strike directions observed at Malikoundi/Boto 2 may result from ductile deformation within the impure marbles and laminated detrital sediments. Contrary to ........

Mining Methods

  • Truck & Shovel / Loader

Summary:

Pit designs were developed for the Boto pit areas – Malikoundi, Malikoundi North and Boto 5 pits. The pit optimization shells used to determine the ultimate pits were also used to outline areas of higher value for targeted early mining and phase development.

Geotechnical berms of 12 m to 20 m in width were designed in the Malikoundi and Malikoundi North pits at the base of the weathering (transition) zone. For Boto 5, flatter slopes on the hangingwall material were recommended and ramps were incorporated in this material to act as geotechnical berms.

Equipment sizing for ramps and working benches is based on the use of 95 t rigid frame haul trucks. The operating width used for the truck is 6.9 m. This means that single lane access is 21.4 m (2x operating width plus berm and ditch) and double lane widths are 28.3 m (3x operating width plus berm and ditch). Ramp gradients are 10% in the pit for uphill gradients. Working benches were designed for 35 m to 40 m minimum on pushbacks, although some pushbacks in the Malikoundi pit did work in a retreat manner to facilitate access.

The Malikoundi pit is designed as four phases within the main pit. Malikoundi North is designed with two phases. Boto 5 is a single-phase pit.

Various rock types are present in the material mined within the final pits. They include the weathering profile of laterite, saprolite, transition and hard rock. Ferricrete is present in some areas and will be utilize ........

Crushing and Grinding
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Processing

Flow Sheet: Subscription required

Summary:

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Projected Production:

CommodityUnitsAvg. AnnualLOM
Gold koz 1291,424
All production numbers are expressed as metal in doré.

Operational Metrics:

Metrics
Daily processing capacity 7,534 t *
Annual mining capacity 38 Mt *
Annual processing capacity 2.75 Mt *
Stripping / waste ratio 7.5 *
Waste tonnes, LOM 218,300 kt *
Ore tonnes mined, LOM 29,040 kt *
Total tonnes mined, LOM 247,341 kt *
Tonnes milled, LOM 29,040 kt *
* According to 2020 study.

Reserves at December 31, 2020:
The Mineral Resources and Reserves as at 31th December 2022 at Boto are unchanged from December 31, 2020.

Boto Gold Mineral Reserves has been estimated as of December 31, 2020 using $1200/oz gold price and Mineral Resources have been estimated as of December 31, 2020 using a $1500/oz gold price.

CategoryTonnage CommodityGradeContained Metal
Probable 29,040 kt Gold 1.7 g/t 1,593 koz
Indicated 40,567 kt Gold 1.6 g/t 2,033 koz
Inferred 8,196 kt Gold 1.8 g/t 469 koz

Commodity Production Costs:

CommodityUnitsAverage
Total cash costs Gold USD  ......  Subscription required
All-in sustaining costs (AISC) Gold USD  ......  Subscription required
Assumed price Gold USD  ......  Subscription required
* According to 2020 study / presentation.

Operating Costs:

Units2020
OP mining costs ($/t milled) USD 16.8 *  
Processing costs ($/t milled) USD  ......  Subscription required
G&A ($/t milled) USD  ......  Subscription required
Total operating costs ($/t milled) USD  ......  Subscription required
* According to 2020 study.
Subscription required - Subscription is required.

2020 Study Costs and Valuation Metrics :

MetricsUnitsLOM Total
Initial CapEx $M USD  ......  Subscription required
Sustaining CapEx $M USD  ......  Subscription required
Total CapEx $M USD  ......  Subscription required
OP OpEx $M USD  ......  Subscription required
Processing OpEx $M USD 396
G&A costs $M USD 108
Total OpEx $M USD  ......  Subscription required
Income Taxes $M USD  ......  Subscription required
Royalty payments $M USD  ......  Subscription required
Gross revenue (LOM) $M USD  ......  Subscription required
Pre-tax Cash Flow (LOM) $M USD  ......  Subscription required
After-tax Cash Flow (LOM) $M USD  ......  Subscription required
After-tax NPV @ 5% $M USD  ......  Subscription required
After-tax NPV @ 10% $M USD  ......  Subscription required
After-tax NPV @ 6% $M USD  ......  Subscription required
After-tax IRR, %  ......  Subscription required
After-tax payback period, years  ......  Subscription required
Subscription required - Subscription is required.
Water Supply
Source: Subscription required

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Proposed Heavy Mobile Equipment as of February 10, 2020:
HME TypeSizeQuantity
Backhoe 7 cu. m ....................... Subscription required
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Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Apr 10, 2023
....................... Subscription required ....................... Subscription required Subscription required Feb 10, 2020
....................... Subscription required ....................... Subscription required Subscription required Feb 10, 2020
....................... Subscription required ....................... Subscription required Subscription required Apr 10, 2023
....................... Subscription required ....................... Subscription required Subscription required Apr 10, 2023
Subscription required - Subscription is required.

Corporate Filings & Presentations:

DocumentYear
Press Release 2023
Annual Information Form 2022
Financial Review 2022
Management Discussion & Analysis 2022
Year-end Mineral Reserves 2022
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
Corporate Presentation 2018
Feasibility Study Report 2018
Management Discussion & Analysis 2018
Press Release 2018
Subscription required - Subscription is required.

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