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Canada
Eskay Creek Project

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 Location:
294 km NW from Smithers, British Columbia, Canada

  Project Contacts:
Suite # 650 - 1021 West Hastings Street
Vancouver
British Columbia, Canada
V6E 0C3
Phone  ...  Subscription required
Fax(604)-558-7695
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Overview

StagePermitting
Mine TypeOpen Pit
Commodities
  • Gold
  • Silver
Mining Method
  • Truck & Shovel / Loader
Mine Life9 years (as of Jan 1, 2022)


Owners

Source: p. 494
CompanyInterestOwnership
Skeena Resources Ltd. (operator) 100 % Indirect
On December 18, 2017, Skeena and Barrick entered into an Option Agreement on the Eskay Creek Property. On October 5, 2020, Skeena and Barrick agreed to amend the terms of the original option agreement on the Eskay Creek Property. Skeena acquired 100% ownership of Eskay Creek.

Contractors

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Deposit Type

  • VMS
  • Epithermal


Summary:

The Eskay Creek deposit is generally classified as an example of a high-grade, precious metals-rich epithermal volcanogenic massive sulphide (VMS) deposit; however, it has also been suggested to be an example of a subaqueous hot spring gold-silver deposit.

Several distinct styles of stratiform and discordant mineralization are present at the Eskay Creek Project, defined over an area approximately 1,400 m long and up to 500 m wide. The main body of mineralization, which was mined out by previous operators, is the 21B Zone, is a stratiform tabular body of gold-silver-rich mineralization roughly 900 m long, 60 to 200 m wide, and locally exceeding 20 m thick. Individual clastic sulphide beds range from 1–100 cm thick and become progressively thinner up sequence. Mineralized zones are composed of beds of clastic sulphides and sulphosalts containing variable amounts of barite, rhyolite, and mudstone clasts. Imbricated, laminated mudstone rip-up clasts were observed locally at the base of the clastic sulphide-sulphosalt beds, indicating turbiditic emplacement of some beds. In the thickest part of the orebody, pebble and cobble-sized clasts occur in a northward trending channel overlying the Eskay Rhyolite.

Gold and silver occur as electrum and amalgam while silver mainly occurs within sulphosalts. Precious metal grades generally decrease proportionally with decrease in total sulphides and sulphosalts. Clastic sulphoside beds contain fragments of coarse-graine ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

The Project is located predominantly to the south of Tom Mackay Creek with a small portion extending to the north. Infrastructure will be located on the south side of Tom Mackay Creek, with the pit extending to the north beyond Tom Mackay Creek. Underground mining has previously been conducted in the northern portion of the Project at depth. The potential for underground development beneath the open pit was examined in preliminary evaluations during the 2021 PFS but was not included as part of the PFS. There is still potential for the inclusion of underground mining in future mining studies.

Pit designs were developed for the north and south pit areas. The initial phases were designed for the purpose of obtaining a technical sample and necessary NAG waste material to create supporting infrastructure. The north pit will consist of an additional three main phases, while the south pit will only contain a single small phase. The pit optimization shells used to determine the ultimate pits were also used to outline areas of higher value for targeted early mining and phase development. The south pit is significantly smaller than the north pit and is likely to be mined near the end of the mine schedule. The south pit generally has harder rock and lower gold grades. Rhyolite is the dominant rock type that will remain in the mined-out pit walls before reclamation.

Each pit phase was designed to accommodate the proposed mining fleet. Mining will occur on 10 m benc ........


Crushing and Grinding
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Processing

Flow Sheet: Subscription required

Summary:

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Projected Production:

CommodityProductUnitsAvg. AnnualLOM
Gold Payable metal koz 2,083
Gold Metal in concentrate koz 2692,419
Silver Payable metal koz  ......  Subscription required
Silver Metal in concentrate koz  ......  Subscription required  ......  Subscription required
Gold Equivalent Payable metal koz  ......  Subscription required
Gold Equivalent Metal in concentrate koz  ......  Subscription required  ......  Subscription required

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 milled, LOM  ......  Subscription required
Daily processing capacity  ......  Subscription required
Annual processing capacity  ......  Subscription required
Annual ore mining rate  ......  Subscription required
* According to 2022 study.
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Reserves at June 30, 2022:
An NSR cut-off of C$24.45/t was used to define reserves based on preliminary processing costs of $18.22/t ore and G&A costs of C$6.23/t ore.
Open Pit Constrained Mineral Resource Statement Reported at 0.7g/t AuEQ Cut-Off Grade by Domain.
Underground Mineral Resource Statement Reported at a 2.4 g/t AuEQ Cut-Off Grade for Long-Hole Mining and 2.8 g/t AuEQ Cut-Off Grade for Drift and Fill Mining.

CategoryOreTypeTonnage CommodityGradeContained Metal
Proven In-Situ (OP) 17.3 kt Gold 3.64 g/t 2.02 M oz
Proven In-Situ (OP) 17.3 kt Silver 99 g/t 55.1 M oz
Proven In-Situ (OP) 17.3 kt Gold Equivalent 4.92 g/t 2.73 M oz
Probable In-Situ (OP) 12.6 kt Gold 2.1 g/t 0.85 M oz
Probable In-Situ (OP) 12.6 kt Silver 50 g/t 20.5 M oz
Probable In-Situ (OP) 12.6 kt Gold Equivalent 2.75 g/t 1.12 M oz
Proven & Probable In-Situ (OP) 29.9 kt Gold 2.99 g/t 2.87 M oz
Proven & Probable In-Situ (OP) 29.9 kt Silver 79 g/t 75.5 M oz
Proven & Probable In-Situ (OP) 29.9 kt Gold Equivalent 4 g/t 3.85 M oz

Commodity Production Costs:

CommodityUnitsAverage
Total cash costs Gold Equivalent USD  ......  Subscription required&nbs
Total cash costs Gold USD  ......  Subscription required *†
All-in sustaining costs (AISC) Gold Equivalent USD  ......  Subscription required&nbs
All-in sustaining costs (AISC) Gold USD  ......  Subscription required *†
Assumed price Silver USD  ......  Subscription required&nbs
Assumed price Gold USD  ......  Subscription required&nbs
* According to 2022 study / presentation.
† Net of By-Product.
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Operating Costs:

Units2022
OP mining costs ($/t mined) CAD 3.7 *
OP mining costs ($/t milled) CAD  ......  Subscription required
Processing costs ($/t milled) CAD  ......  Subscription required
G&A ($/t milled) CAD  ......  Subscription required
Total operating costs ($/t milled) CAD  ......  Subscription required
* According to 2022 study.
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2022 Study Costs and Valuation Metrics :

MetricsUnitsLOM Total
Initial CapEx $M CAD  ......  Subscription required
Expansion CapEx $M CAD  ......  Subscription required
Equipment leasing 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 505.4
G&A costs $M CAD 125.1
Total OpEx $M CAD  ......  Subscription required
Total Taxes $M CAD  ......  Subscription required
Royalty payments $M CAD  ......  Subscription required
Gross revenue (LOM) $M CAD  ......  Subscription required
Net revenue (LOM) $M CAD  ......  Subscription required
EBITDA (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 @ 5% $M CAD  ......  Subscription required
Pre-tax NPV @ 10% $M CAD  ......  Subscription required
Pre-tax NPV @ 8% $M CAD  ......  Subscription required
After-tax NPV @ 5% $M CAD  ......  Subscription required
After-tax NPV @ 10% $M CAD  ......  Subscription required
After-tax NPV @ 8% $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
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Pipelines
TypeMaterialDiameterLengthDescription


Proposed Heavy Mobile Equipment as of September 6, 2022:
HME TypeSizeQuantityLeased or
Contractor
Dozer (crawler) 474 kW ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Sep 20, 2022
....................... Subscription required ....................... Subscription required Subscription required Sep 6, 2022
....................... Subscription required ....................... Subscription required Subscription required Sep 6, 2022
....................... Subscription required ....................... Subscription required Subscription required Sep 20, 2022
Subscription required - Subscription is required.

Staff:

EmployeesYear
Subscription required 2022

Corporate Filings & Presentations:

DocumentYear
Corporate Presentation 2022
Feasibility Study Report 2022
................................... Subscription required 2021
................................... Subscription required 2019
Subscription required - Subscription is required.

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