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Cote d'Ivoire
Doropo Project

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 Location:
52 Km NW from Bouna, Cote d'Ivoire

  Project Contacts:
Cocody II Plateaux Vallons
Abidjan
Cote d'Ivoire
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Overview

StagePreliminary Economic Assessment
Mine TypeOpen Pit
Commodities
  • Gold
Mining Method
  • Truck & Shovel / Loader
Production Start...
Mine Life13 years (as of Jan 1, 2021)
The Doropo Project (“Doropo”) consists of seven exploration permits, covering an area of approximately 1,850km2.


Owners

Source: p. 5
CompanyInterestOwnership
Centamin plc. 100 % Indirect
The Doropo Project is contained within seven (7) current exploration permits that were granted to Ampella Mining Cote d’Ivoire and Ampella Mining Exploration Cote d’Ivoire, which are both 100% owned Ivoirian subsidiaries of Centamin. The block of permits covers a total area of 1,847 km2.

Contractors

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Deposit Type

  • Vein / narrow vein


Summary:

The Doropo Project currently includes thirteen distinct mineralised bodies that host the actual resource plus numerous prospects and geochemical surface anomalies yet to be tested, fitting an area of about 170 km2, or within a circular area of 28 km radius.

The mineral occurrences tested to date include two model types, a “classic” shear hosted gold deposit model and a quartz vein hosted gold deposit model.

The granitic complex displays lozenge-shaped arrays of anastomosing shear zones. The shears have a broad South-South-West to North-North-East orientation, dipping shallowly towards the NW. The mineralisation occurs all along the shears, which were all channel ways for the fluid flows, however at a generally lowgrade gold deposition. Significant higher grade mineralisation occurs on specific localised trend orientations, or when shears intersect, and often spatially associated with doleritic dyke swarms (Davis, 2017).

The quartz veins mainly occur along the NW-SE orientation, as sub-vertical or steeply dipping towards the SW. These veins show significant gold grades and often visible gold but have a limited width.

Mineral assemblages distal to the mineralised zones include epidote-chlorite and hematite. Hematite alteration is then pervasive at weak to medium intensity. This hematite alteration can be very strong in the vicinity of the doleritic dykes, making the vectoring towards mineralisation difficult in such areas.


Mining Methods

  • Truck & Shovel / Loader


Summary:

The Project basis is a contract mining operation, delivering nominally 4.0 Mtpa of ore to the ROM pad annually based on 100% fresh ore feed.

An annualised pit production schedule was produced with the primary aim of supplying ore grade material to the processing facility at a rate of 4.0 Mtpa for fresh ore and 4.5 Mtpa for the softer oxide and transition ores.

A contract mining model undertaken with the use of standard open pit mining equipment which includes diggers consisting of back-hoe configured excavators in the 100t to 200t class size, loading into circa 100t off-highway mining dump trucks delivering material to the waste dump, stockpiles and ROM pad locations in line with the material classifications. Drilling and blasting is included within the estimated mining costs as part of the contract mining assumption, with drilling and blasting typicallyassumed to be over 10m bench heights which were planned to be mined in 2.5m to 5m high mining flitches based on grade control determinations for selective mining practices.

Open pit optimisations were completed for each pit and mine production scheduled of the selected shells.

No pit designs were undertaken for this study and the selected pit shells the tonnages of which were factored to simulate ore losses of 5% and waste gains of 10% to simulate anticipated inventories fromdetailed pit designs.

The primary aim of the production schedule was to produce an ore feed within ........


Crushing and Grinding
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Processing

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Summary:

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Projected Production:

CommodityUnitsAvg. AnnualLOM
Gold oz 150,9561,962,432
All production numbers are expressed as metal in doré.

Operational Metrics:

Metrics
Stripping / waste ratio  ......  Subscription required
Waste tonnes, LOM  ......  Subscription required
Ore tonnes mined, LOM  ......  Subscription required
Total tonnes mined, LOM  ......  Subscription required
Tonnes processed, LOM  ......  Subscription required
Annual mining rate  ......  Subscription required
Annual ore mining rate  ......  Subscription required
* According to 2021 study.
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Reserves at October 25, 2022:
Resource estimates have been reported at 0.5 g/t gold cut-off.

CategoryTonnage CommodityGradeContained Metal
Indicated 51.51 Mt Gold 1.52 g/t 2.52 M oz
Inferred 13.67 Mt Gold 1.14 g/t 0.5 M oz

Commodity Production Costs:

CommodityUnitsAverage
Cash costs (sold) Gold USD  ......  Subscription required&nbs
All-in sustaining costs (sold) Gold USD  ......  Subscription required&nbs
Assumed price Gold USD  ......  Subscription required&nbs
* According to 2021 study / presentation.
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Operating Costs:

Units2021
OP mining costs ($/t mined) USD 2.5 *
Processing costs ($/t milled) USD  ......  Subscription required
G&A ($/t milled) USD  ......  Subscription required
* According to 2021 study.
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2021 Study Costs and Valuation Metrics :

MetricsUnitsLOM Total
Initial CapEx $M USD  ......  Subscription required
Sustaining CapEx $M USD  ......  Subscription required
OP OpEx $M USD  ......  Subscription required
Processing OpEx $M USD 647
G&A costs $M USD 146
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
Net revenue (LOM) $M USD  ......  Subscription required
Operating margin (LOM) $M USD  ......  Subscription required
Pre-tax Cash Flow (LOM) $M USD  ......  Subscription required
After-tax Cash Flow (LOM) $M USD  ......  Subscription required
Pre-tax NPV @ 5% $M USD  ......  Subscription required
After-tax NPV @ 5% $M USD  ......  Subscription required
Pre-tax IRR, %  ......  Subscription required
After-tax IRR, %  ......  Subscription required
After-tax payback period, years  ......  Subscription required
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Heavy Mobile Equipment:

Mine Management:

Job TitleNamePhoneProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Dec 5, 2022
....................... Subscription required ....................... Subscription required ....................... Subscription required Subscription required Dec 5, 2022
....................... Subscription required ....................... Subscription required Subscription required Dec 5, 2022
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Corporate Filings & Presentations:

DocumentYear
Corporate Presentation 2022
Corporate Presentation 2022
Corporate Presentation 2022
Year-end Mineral Reserves 2022
................................... Subscription required 2021
................................... Subscription required 2021
Subscription required - Subscription is required.

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