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Mali
Diba & Lakanfla Project

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 Location:
15 km S from Sadiola, Mali

  Project Contacts:
1020 - 800 West Pender
Vancouver
British Columbia, Canada
V6C 2V6
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EmailEmail
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Fleet
  • Personnel
  • Filings & News

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Overview

StagePermitting
Mine TypeOpen Pit
Commodities
  • Gold
Mining Method
  • Truck & Shovel / Loader
Mine Life4.7 years (as of Jan 1, 2022)
19 April 2022 – Mining Licence granted on the Diba gold project.


Owners

Source: p. 15
CompanyInterestOwnership
Elemental Altus Royalties Corp. 100 % Indirect
In 2018 Altus Strategies completed a Plan of Arrangement with Legend Gold, and the licence is now held by Altus's 100% owned subsidiary LGN Holdings (BVI) Ltd.

August 16, 2022 – Elemental Royalties Corp. is pleased to announce the completion of the previously announced share-for-share merger of equals with Altus Strategies plc to create a global gold royalty champion.

Elemental intends to change its name to ‘Elemental Altus Royalties Corp.’ and its trading symbol on the TSX-V will remain as ELE. On the OTCQX, the ticker remains ELEMF.

Contractors

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Deposit Type

  • Stratabound
  • Orogenic
  • Sediment-hosted


Summary:

Mining Plus visited the site on 6 and 7 June 2022 and can confirm the deposit type as described in Woodman and van Osta (Woodman, 2007). They describe the principal deposit at Diba and Diba NW as analogous to the Sadiola Gold Mine, located 20km north of the Diba & Lakanfla project. However, the Sadiola deposit occurs in rocks assigned to the Kofi Formation, whereas the Diba discovery occurs in rocks assigned to the Kéniébandi Formation. Until the discovery at Diba, no significant gold deposits had been recognized in the Kéniébandi Formation of western Mali.

Common features of the orogenic gold deposits in the Kéniéba-Kédougou inlier are their shear-hosted character, the intimate association of the gold mineralization with permeable lithologies and fractured host rocks, producing stratabound mineralized bodies, and the link between gold mineralization and carbonatisation and Fe-rich alteration.

The source of orogenic gold has been strongly debated. In particular, the composition and source of hydrothermal fluids that sourced the gold mineralizationin Mali had been poorly studied until very recently. Simon and Pizarro (Simon, 2013)reviewed a detailed geological study at Loulo, which included fluid-inclusion investigations, and determined that low-salinity, reduced, CO2-rich metamorphic fluids were associated with gold mineralization at Loulo, which is consistent with many orogenic gold fluid studies worldwide. The geological study considered the hyper-sali ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

The pit optimisation was completed based on a selling price of USD$1,750/oz Au.

Pit shell selection was performed for mine design and planning. At Diba Pit 99 with a profit factor of 100% was selected. At Lakanfla Pit 57 was chosen with a profit factor of 83%.

Tonnage of PMI content inside the selected Diba pit shell includes 6,080 kt of PMI with an average grade of 1.22 g/t of Au and includes a stripping ratio (waste:PMI) of 1.04. Lakanfla pit shell includes 3,420 kt of PMI with an average grade of 0.70 g/t of Au and includes a stripping ratio (waste:PMI) of 0.99.

A conceptual mine design has been completed based on the optimal pit shell generated, assuming the use of rigid off road trucks with ~100t tray capacity. The pit design was prepared using a minimum mining width of 30m with a ramp width of 16m single lane; 25m dual lane and 10% gradient. Face angles used are 50° for the oxide zone, 60° for the transitional and 65° for the fresh rock zone.

The mining plan requires limited initial waste stripping using a PC1250-8 and a CAT365 excavator. Mining would be via conventional open-pit methods (drilling, blasting, loading, haulage and ancillary services). It is expected that oxide material is free dig and will not require blasting, however a blasting cost has been applied to 15% of oxide tonnage in case of any difficult ground. The use of a mining contractor for earth movement has been assumed for both mine plans

Min ........


Crushing and Grinding
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Processing

Flow Sheet: Subscription required

Summary:

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Projected Production:

CommodityUnitsAvg. AnnualLOM
Gold oz 54,380271,898
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
Daily processing rate  ......  Subscription required
Tonnes processed, LOM  ......  Subscription required
Annual processing rate  ......  Subscription required
Annual ore mining rate  ......  Subscription required
* According to 2022 study.
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Reserves at July 28, 2022:
Mineral Resources are reported within a pit shells and are reported to a base-case grade cut-off of 0.5 g/t Au.

CategoryTonnage CommodityGradeContained Metal
Indicated 7.8 Mt Gold 1.24 g/t 312 koz
Inferred 12.7 Mt Gold 0.87 g/t 362 koz
Total Resource 20.6 Mt Gold 1.01 g/t 673 koz

Commodity Production Costs:

CommodityUnitsAverage
All-in sustaining costs (AISC) Gold USD  ......  Subscription required&nbs
All-in costs Gold USD  ......  Subscription required&nbs
Assumed price Gold USD  ......  Subscription required&nbs
* According to 2022 study / presentation.
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Operating Costs:

Units2022
OP mining costs ($/t milled) USD 8.55 *
Processing costs ($/t milled) USD  ......  Subscription required
G&A ($/t milled) USD  ......  Subscription required
Total operating costs ($/t milled) USD  ......  Subscription required
* According to 2022 study.
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2022 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 62.4
G&A costs $M USD 28.2
Total OpEx $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
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
Pre-tax payback period, years  ......  Subscription required
After-tax payback period, years  ......  Subscription required
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Heavy Mobile Equipment as of July 28, 2022:
HME TypeModelSizeQuantityStatusLeased or
Contractor
Drill 102 mm Existing Leased
....................... Subscription required ....................... Subscription required Proposed Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required ....................... Subscription required Proposed Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required ....................... Subscription required Proposed Leased
....................... Subscription required ....................... Subscription required Proposed Leased
Subscription required - Subscription is required.

Mine Management:

Job TitleNamePhoneEmailProfileRef. Date
....................... Subscription required ....................... Subscription required ....................... Subscription required ....................... Subscription required Subscription required Jul 28, 2022
....................... Subscription required ....................... Subscription required Subscription required Aug 29, 2022
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Corporate Filings & Presentations:

DocumentYear
Preliminary Economic Assessment 2022
Press Release 2022
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
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