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Mali
Kalana Main Project

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 Location:
Kalana, Mali

  Project Contacts:
Hotel Palm Club Croisement Boulevard Latrille et rue du Lycée Technique
Abidjan
Cote d'Ivoire
08 BP 872
Phone  ...  Subscription required
WebsiteWeb
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Fleet
  • Personnel
  • Filings & News

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Overview

StageFeasibility
Mine TypeOpen Pit
Commodities
  • Gold
Mining Method
  • Truck & Shovel / Loader
Processing
  • Gravity separation
  • Agitated tank (VAT) leaching
  • Concentrate leach
  • Carbon in leach (CIL)
  • AARL elution
  • Carbon adsorption-desorption-recovery (ADR)
  • Solvent Extraction & Electrowinning
  • Cyanide (reagent)
Mine Life18 years (as of Jan 1, 2016)
Latest NewsEndeavour Reports Positive PFS Results For Both Fetekro and Kalana, Confirming Strong Organic Growth Pipeline     February 23, 2021


Owners

Source: p. 6, 59, 76
CompanyInterestOwnership
Endeavour Mining Corp. 80 % Indirect
On September 18, 2017, the Corporation completed the acquisition of Avnel Gold Mining Ltd. The Corporation acquired 100% of the share capital of Avnel with an issuance of 7,218,964 common shares. Avnel owns 80% of the Kalana gold project in Mali.

The Kalana Project is owned by Société d’Exploitation des Mines d’Or de Kalana, S.A. (“SOMIKA”). Avnel has an 80% equity interest in SOMIKA and the Malian Government holds a beneficial interest in the remaining 20%, which has anti-dilution and free-carry rights.

Deposit Type

  • Vein / narrow vein
  • Sedimentary - Volcanogenic
  • Mesothermal


Summary:

The Kalana. Kalanako and Djirila gold deposits occur within Birimian aged volcanosedimentary sequence of rocks that are known to host several Eburnean orogenic gold deposits. The Kalana study area is underlain by geology considered to be similar to that of the surrounding Birimian-age volcano-sedimentary sequences. Orogenic gold deposits in West Africa are shear hosted and developed along strike-slip fault systems linked to late stage, non-orthogonal. crustal thinning.

Mineralisation is structurally and lithologically controlled in association with regional- scale deformation zones. Gold mineralisation within this type of deposit often has a high fraction of coarse gold, significantly increasing the variability of the mineralisation and grade. In the Kalana-Yanfolila volcano-sedimentary basin, the dominance of low porosity brittle lithologies favour quartz vein-related mineralisation; the mid-crust level of initial emplacement favours mesothermal type gold deposits.

Gold mineralisation occurs within a stacked set of quartz veins and stockworks hosted by the Birimian age meta-sediments, and the intrusive diorite stock and trend northwest-southeast. The mineralised vein system extends over an area of about 1,200 m east by 1,000 m north and current exploration information suggests it to be restricted to a block bound by northwest and northeast trending faults. Mineralisation has been identified by diamond drilling from surface down to a depth of 600 m, the limit of drilling.

The Kalana deposit contains several mineralised bodies that can display four types of mineralisation:
1)Flat dipping (an average dip of less than 35°) quartz veins and vein sets in the meta-sediments and diorite stock
2)Steeply dipping quartz veins and vein zones (an average dip of more than 70°)
3)Disseminated mineralisation (around both flat and steeply dipping veins)
4)Stockwork mineralisation at the contact of the diorite.


Mining Methods

  • Truck & Shovel / Loader


Summary:

The mine plan provides for mining production from the Kalana Open Pit deposit, from a single open pit with 12 stages. The most appropriate mining method is conventional open pit mining using trucks and excavators.


Crushing and Grinding


Processing

  • Gravity separation
  • Agitated tank (VAT) leaching
  • Concentrate leach
  • Carbon in leach (CIL)
  • AARL elution
  • Carbon adsorption-desorption-recovery (ADR)
  • Solvent Extraction & Electrowinning
  • Cyanide (reagent)

Source: Subscription required

Summary:

Kalana processing plant design is based on a typical two stage crushing and ball milling circuit and gravity recovery followed by a CIL plant, electrowinning and gold smelting. This process flowsheet is well known in industry. and has historically been proven as a processing route for various gold ores.

The primary jaw crusher product will bypass the secondary crusher when treating saprolite or highly weathered feedstock, while more competent saprock feedstock and fresh ore feeds will be routed to a closed circuit secondary crusher prior to entering the milling circuit.

A gravity recovery circuit will treat the full ball mill discharge to recover coarse free gold from the mill recirculating load. The gravity concentrate will be treated in an Acacia reactor to leach out gravity gold which will be recovered in the electrowinning circuit Gravity tailings will be returned to the mill classification circuit.

The milled product (cyclone overflow) will gravit ........

Recoveries & Grades:

CommodityParameterAvg. LOM
Gold Recovery Rate, % 92.7
Gold Head Grade, g/t 2.81

Projected Production:

CommodityUnitsAvg. AnnualLOM
Gold koz 1011,821
All production numbers are expressed as metal in doré.

Operational Metrics:

Metrics
Stripping / waste ratio 9.9 *
Annual mining capacity 12 Mt *
Waste tonnes, LOM 207.8 Mt *
Ore tonnes mined, LOM 21 Mt *
Total tonnes mined, LOM 229 Mt *
Tonnes processed, LOM 21.8 Mt *
Annual processing rate 1.26 Mt *
* According to 2016 study.

Reserves at December 31, 2018:

CategoryTonnage CommodityGradeContained Metal
Proven 5.1 Mt Gold 3 g/t 492 koz
Probable 16.6 Mt Gold 2.76 g/t 1,472 koz
Proven & Probable 21.7 Mt Gold 2.81 g/t 1,964 koz
Measured 9.5 Mt Gold 4.19 g/t 1,280 koz
Indicated 16.3 Mt Gold 3.74 g/t 1,964 koz
Measured & Indicated 25.8 Mt Gold 3.92 g/t 3,254 koz
Inferred 1.9 Mt Gold 4.41 g/t 265 koz

Commodity Production Costs:

CommodityUnitsAverage
Cash costs Gold USD 648 / oz *
Total cash costs Gold USD 695 / oz *
All-in sustaining costs (AISC) Gold USD 784 / oz *
Assumed price Gold USD 1,200 / oz *
* According to 2016 study / presentation.

Operating Costs:

Units2016
OP mining costs ($/t mined) USD 2.83 *
OP mining costs ($/t milled) USD  ......  Subscription required
* According to 2016 study.
Subscription required - Subscription is required.

Financials:

Units2019
Capital expenditures (planned) M USD  ......  Subscription required
Subscription required - Subscription is required

2016 Study Costs and Valuation Metrics :

MetricsUnitsLOM Total
Pre-Production capital costs $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 353.6
Refining and transportation $M USD  ......  Subscription required
G&A costs $M USD 172.3
Total OpEx $M USD  ......  Subscription required
Royalty payments $M USD  ......  Subscription required
Gross revenue (LOM) $M USD  ......  Subscription required
Net revenue (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 @ 8% $M USD  ......  Subscription required
After-tax NPV @ 8% $M USD  ......  Subscription required
Pre-tax IRR, %  ......  Subscription required
After-tax IRR, %  ......  Subscription required
After-tax payback period, years  ......  Subscription required
Subscription required - Subscription is required.

Proposed Heavy Mobile Equipment as of March 30, 2016:
HME TypeSizeQuantity
Dozer (crawler) 50 t 3
....................... Subscription required ....................... Subscription required 1
....................... Subscription required ....................... Subscription required 4
....................... Subscription required ....................... Subscription required 4
....................... Subscription required ....................... Subscription required 1
....................... Subscription required ....................... Subscription required 2
....................... Subscription required ....................... Subscription required 3
....................... Subscription required 1
....................... Subscription required 31
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Mar 22, 2021
....................... Subscription required ....................... Subscription required Subscription required Mar 22, 2021
....................... Subscription required ....................... Subscription required Subscription required Mar 22, 2021
Subscription required - Subscription is required.


Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2020
................................... Subscription required 2019
Management Discussion & Analysis 2018
Press Release 2018
Corporate Presentation 2017
Management Discussion & Analysis 2017
Press Release 2017
Technical Report 2016
Subscription required - Subscription is required.

News:

NewsDate
Endeavour Reports Positive PFS Results For Both Fetekro and Kalana, Confirming Strong Organic Growth Pipeline February 23, 2021

Subscription required - Subscription is required.

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