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Burkina Faso
Nabanga Project

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 Location:
250 km SE from Ouagadougou, Burkina Faso

  Project Contacts:
Sector 13, Babanguida Avenue Benda Street, Door # 211
01 PO Box 390
Ouagadougou
Burkina Faso
Phone  ...  Subscription required
Fax(011)-226-50-36-95-87
EmailEmail
WebsiteWeb
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Personnel
  • Filings & News

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Overview

StagePreliminary Economic Assessment
Mine TypeOpen Pit & Underground
Commodities
  • Gold
Mining Method
  • Truck & Shovel / Loader
  • Longhole stoping
  • Longitudinal stoping
  • Cemented backfill
Mine Life9 years (as of Jan 1, 2019)
The Nabanga Project was acquired by Endeavour in July 2020 as part of the SEMAFO transaction. The previous owners completed a Preliminary Economic Study on the project in September 2019. Endeavour is evaluating this project in the context of its overall exploration portfolio and will determine next steps.


Owners

Source: p. 986
CompanyInterestOwnership
Government of Burkina Faso 10 % Indirect
Endeavour Mining plc 90 % Indirect
The Nabanga exploration permit (also known as Nabangou and the Nabanga Permit) is registered under the name of Birimian Resources, in which the Endeavour Mining plc has a 90% equity interest with the remaining 10% reflecting a carried ownership of the GoBF.

Contractors

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Deposit Type

  • Vein / narrow vein
  • Intrusion related
  • Mesothermal


Summary:

The Yactibo Permit Group straddles a major NE-trending shear separating the Youga Belt in the northwest from the Diapaga Belt in the southeast. The Nabanga deposit is located to the southeast of the shear, in the Diapaga Belt, which is the easternmost Belt in Burkina Faso.

The Diapaga Belt is dominantly comprised of metamorphosed intermediate volcanic rocks, sediments, foliated or migmatitic granite and gneiss, with less common mafic volcanic rocks and mafic-ultramafic intrusive complexes. Conglomeratic sediments are present and are mapped as Tarkwaian equivalents. Early banded or and/or foliated granitoids, which may be ascribed to the TTG Group, are also very common.

The overall strike of the Nabanga mineralized structure is NE-SW and the dip varies between 55° and 70° toward the northwest. It has an average horizontal thickness of 3.2 m. A large proportion of the high gold values are contained within the quartz vein. The mineralization is arranged as a series of shoots plunging at 45º to the NE. The mineralization is often lower-grade and/or narrower where the main zone is hosted in the amphibolite.

The Nabanga deposit is divided into the North, Central and Southern Extension Zones. A subparallel, 800 m long structure referred to as the Nabanga North Lode is present to the NW.

The main feature on the Property is the granodiorite hosting the mineralization. The intrusion is in contact on the north with an assemblage of volcanic ........


Mining Methods

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


Summary:

The Nabanga deposit will be mined by the use of the Open Pit and Underground mining methods.

A conventional truck/shovel operation will be used for all open pits. Drill and blast will be required almost at the beginning of the excavation work because there is almost no overburden (saprolite). Given the expected short life of the Open Pit operation, it is anticipated that a contractor will be selected and be responsible for all aspect of surface mining (operation, maintenance, office, garage erection and management).

The ramps and haul roads were designed with an overall width of 15.5 m. For double lane traffic industry practice indicates the running surface width to be a minimum of 2.5 times the width of the largest truck. The overall width of a 50-tonne haul truck is 3.9 m which results in a running surface of 9.75 m. The allowance for berms and ditches increases the overall haul road width to 15.5 m. A maximum ramp grade of ten (10) % was used. This grade is acceptable for a 50-tonne haul truck.

The open pit mining will be completed during Year 2 of the operation, and the total duration of the open pit operation is expected to be approximately 31 months.

All of the underground mining will be contracted as a turnkey project. The contractor will oversee all mining aspects including mobile, fixed equipment and the maintenance, mine services and facilities.

The underground mine has been designed for a 1,000 t/d production ........


Crushing and Grinding
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Processing

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Summary:

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Projected Production:

CommodityUnitsAvg. AnnualLOM
Gold oz 70,000570,768
All production numbers are expressed as metal in doré.

Operational Metrics:

Metrics
Stripping / waste ratio 22.8 *
Waste tonnes, LOM 14,058,323 t *
Ore tonnes mined, LOM 2,980,434 t *
Total tonnes mined, LOM 17,038,757 t *
Daily processing capacity 1,080 dmt *
Tonnes processed, LOM 2,980,434 t *
Annual processing capacity 360,000 dmt *
* According to 2019 study.

Reserves at December 31, 2019:
Cut-off grade 3.0 g/t Au.

CategoryTonnage CommodityGradeContained Metal
Inferred 3,402,000 t Gold 7.69 g/t 841,000 oz

Commodity Production Costs:

CommodityUnitsAverage
Total cash costs Gold USD  ......  Subscription required&nbs
All-in sustaining costs (AISC) Gold USD  ......  Subscription required&nbs
Assumed price Gold USD  ......  Subscription required&nbs
* According to 2019 study / presentation.

Operating Costs:

Units2019
OP mining costs ($/t mined) USD 44.9 *
UG mining costs ($/t mined) USD  ......  Subscription required
Combined mining costs ($/t mined) USD  ......  Subscription required
Processing costs ($/t milled) USD  ......  Subscription required
G&A ($/t milled) USD  ......  Subscription required
* According to 2019 study.
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2019 Study Costs and Valuation Metrics :

MetricsUnitsLOM Total
Pre-Production capital costs $M USD  ......  Subscription required
Sustaining CapEx $M USD  ......  Subscription required
Closure costs $M USD  ......  Subscription required
OP/UG OpEx $M USD  ......  Subscription required
Processing OpEx $M USD 139.1
G&A costs $M USD 39.9
Total OpEx $M USD  ......  Subscription required
Royalty payments $M USD  ......  Subscription required
Gross revenue (LOM) $M USD  ......  Subscription required
EBITDA (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
Pre-tax NPV @ 10% $M USD  ......  Subscription required
Pre-tax NPV @ 8% $M USD  ......  Subscription required
After-tax NPV @ 5% $M USD  ......  Subscription required
After-tax NPV @ 10% $M USD  ......  Subscription required
After-tax NPV @ 8% $M USD  ......  Subscription required
Pre-tax IRR, %  ......  Subscription required
After-tax IRR, %  ......  Subscription required
Pre-tax payback period, years  ......  Subscription required
After-tax payback period, years  ......  Subscription required
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Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Nov 14, 2019
....................... Subscription required ....................... Subscription required Subscription required Mar 31, 2022
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Staff:

Total WorkforceYear
Subscription required 2019

Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2019
................................... Subscription required 2019
Subscription required - Subscription is required.

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