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Canada
Chidliak Project

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 Location:
132 km NE from Iqaluit, Nunavut, Canada

  Project Contacts:
1601 Airport Road NE, Suite 300
Calgary
Alberta, Canada
T2E 6Z8
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Overview

StagePreliminary Economic Assessment
Mine TypeOpen Pit
Commodities
  • Diamond
Mining Method
  • Truck & Shovel / Loader
Mine Life13 years (as of Jan 1, 2018)


Owners

 
CompanyInterestOwnership
De Beers Canada Inc. 100 % Indirect

Contractors

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Deposit Type

  • Kimberlite


Summary:

Kimberlites and lamproites are volcanic and subvolcanic varieties of ultramafic rocks and are the main hosts for terrestrial diamonds. The vast majority of global primary diamond mines are hosted in kimberlite, and this rock type is the target at the Chidliak project. Kimberlites are mantle-derived, volatile-rich ultramafic magmas that transport diamonds from depths of 150 to 200 km to the earth’s surface, together with fragments of mantle rocks from which the diamonds are directly derived (primarily peridotite and eclogite). Kimberlites occur at surface as volcanic pipes, irregular shaped intrusions, or sheet-like intrusions (dykes or sills). Due to the wide range of settings for kimberlite emplacement, as well as varying properties of the kimberlite magma itself (most notably volatile content), kimberlite volcanoes can take a wide range of forms and be infilled by a variety of deposit types, even within a single kimberlite field, like Chidliak.

The Chidliak kimberlites are stratified bodies and different pipes contain different types of infill ranging from VK (Volcaniclastic Kimberlite) only to mixed VK, ACK (Apparent Coherent Kimberlite) and CK (Coherent Kimberlite) deposits (referred to as combined infill pipes). None of the Chidliak pipes contain massive VK-type infills like observed in many southern African kimberlites and in Canadian pipes at Gahcho Kué or Renard (Field and Scott Smith, 1999; Field et al., 2008, Fitzgerald et al., 2009; Hetman et al., 2004) ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

It is planned to open pit (OP) mine the Chidliak CH-6 and CH-7 deposits. Mining of the deposits will produce a total of 9.5 Mt of processing plant feed and 75.1 Mt of waste (7.9:1 overall strip ratio) over a 13-year mine life.

The current life of mine (LOM) plan focuses on achieving consistent plant feed production rates, and early mining of higher value material, as well as balancing grade and strip ratios.

The pit shells for Chidliak were further analyzed and optimizations were conducted in order to better define the possible stage shapes within the ultimate pit limits. It was decided to divide the pit sequence into three stages at CH-6 and two stages at CH-7 for the mine plan development to maximize the grade in the early years, reduce the pre stripping requirements, and to maintain the process facility at full production capacity.

The current LOM plan focuses on achieving consistent processing feed production rates, mining of higher value material early in the schedule, balancing grade and strip ratios, while trying to maximize NPV. Mining would commence at CH-6 and then moves onto CH-7 later in the mine life.

Year -1 represents the planned commencement of pre-stripping at CH-6. The average mining rate over the LOM will be 16,500 t/d, reaching a maximum of 28,200 t/d from Year 1 to Year 6. During full production, the mine, on average, is estimated to produce 1.3 Mct/a with a LOM average mining head grade of 1.8 ct/t.


Crushing and Grinding
Flow Sheet: Source


Processing

Flow Sheet: Subscription required

Summary:

- subscription is required.


Projected Production:

CommodityUnitsAvg. AnnualLOM
Diamond M carats 1.317
All production numbers are expressed as mineral.

Operational Metrics:

Metrics
Ore tonnes mined 9.5 Mt *
Stripping / waste ratio 7.9 *
Daily mining rate 16,500 t *
Daily ore mining rate 2,000 t *
Waste tonnes, LOM 75.1 Mt *
Total tonnes mined, LOM 84.6 Mt *
Plant annual capacity 730,000 t *
Daily processing capacity 2,000 t *
Tonnes processed, LOM 9.5 Mt *
* According to 2018 study.

Reserves at May 23, 2018:

CategoryTonnage CommodityGradeContained carats
Inferred 12.45 Mt Diamond 1.78 carats/t 22.19 M carats

Commodity Production Costs:

CommodityUnitsAverage
Cash costs Diamond CAD 59.6 / carat *  
* According to 2018 study / presentation.

Operating Costs:

Units2018
OP mining costs ($/t milled) CAD 42.8 *
Processing costs ($/t milled) CAD  ......  Subscription required
Total operating costs ($/t milled) CAD  ......  Subscription required
* According to 2018 study.
Subscription required - Subscription is required.

2018 Study Costs and Valuation Metrics :

MetricsUnitsLOM Total
Pre-Production capital costs $M CAD  ......  Subscription required
Sustaining CapEx $M CAD  ......  Subscription required
Closure costs $M CAD  ......  Subscription required
Total CapEx $M CAD  ......  Subscription required
OP OpEx $M CAD  ......  Subscription required
Processing OpEx $M CAD 170.2
Site services costs $M CAD 97
G&A costs $M CAD 179.3
Total OpEx $M CAD  ......  Subscription required
Income Taxes $M CAD  ......  Subscription required
Total Taxes $M CAD  ......  Subscription required
Gross revenue (LOM) $M CAD  ......  Subscription required
Net revenue (LOM) $M CAD  ......  Subscription required
Pre-tax Cash Flow (LOM) $M CAD  ......  Subscription required
After-tax Cash Flow (LOM) $M CAD  ......  Subscription required
Pre-tax NPV @ 0% $M CAD  ......  Subscription required
Pre-tax NPV @ 5% $M CAD  ......  Subscription required
Pre-tax NPV @ 10% $M CAD  ......  Subscription required
Pre-tax NPV @ 7.5% $M CAD  ......  Subscription required
After-tax NPV @ 0% $M CAD  ......  Subscription required
After-tax NPV @ 5% $M CAD  ......  Subscription required
After-tax NPV @ 10% $M CAD  ......  Subscription required
After-tax NPV @ 7.5% $M CAD  ......  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
Subscription required - Subscription is required.


Proposed Heavy Mobile Equipment as of May 23, 2018:
HME TypeModelSizeQuantity
Dozer (crawler) ....................... Subscription required ....................... Subscription required
....................... Subscription required ....................... Subscription required ....................... Subscription required
....................... Subscription required ....................... Subscription required ....................... Subscription required
....................... Subscription required ....................... Subscription required ....................... Subscription required
....................... Subscription required ....................... Subscription required ....................... Subscription required
....................... Subscription required ....................... Subscription required ....................... Subscription required
....................... Subscription required ....................... Subscription required ....................... Subscription required
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required May 23, 2018
....................... Subscription required ....................... Subscription required Subscription required Oct 31, 2022
Subscription required - Subscription is required.


Corporate Filings & Presentations:

DocumentYear
Corporate Presentation 2018
Preliminary Economic Assessment 2018
Press Release 2018
Technical Report 2018
Preliminary Economic Assessment 2016
Press Release 2016
Technical Report 2016
Technical Report 2015
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