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Canada
Prairie Creek Project

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 Location:
95 km NW from Nahanni Butte, Northwest Territories, Canada

  Project Contacts:
701 West Georgia Street, Suite 1875
Vancouver
British Columbia, Canada
V7Y 1C6
Phone  ...  Subscription required
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Fleet
  • Personnel
  • Filings & News

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Overview

StagePermitting
Mine TypeUnderground
Commodities
  • Zinc
  • Lead
  • Silver
Mining Method
  • Longhole open stoping
  • Longitudinal retreat
  • Uppers Retreat
  • Paste backfill
Mine Life20.3 years (as of Jan 1, 2021)
The Prairie Creek Mine is a remote, isolated site, with existing site infrastructure that requires upgrade, expansion or replacement where necessary.
Latest NewsNorZinc Announces Closing of Plan of Arrangement     December 13, 2022


Owners

Source: p. 47
CompanyInterestOwnership
RCF VI CAD LLC 100 % Indirect
NorZinc is the 100% owner of the Property.

Contractors

Subscription required - Subscription is required.


Deposit Type

  • Breccia pipe / Stockwork
  • Vein / narrow vein
  • Mississippi Valley Type
  • Stratabound
  • Hydrothermal


Summary:

Four main styles of base metal mineralization have been identified on the Property:
• Hydrothermal Quartz Veins (MQV);
• Stockwork (STK);
• Stratabound (SMS); and
• Mississippi Valley type (MVT).

MQV Mineralization
Vein-type mineralization developed within the cherty dolomites of the Ordovician-Silurian age Upper Whittaker Formation and shaly dolomites of the lower Road River Formation, along the axial plane of the Prairie Creek Anticline (PCA).

MQV type mineralization comprises massive to disseminated galena and sphalerite with lesser pyrite and tetrahedrite-tennantite in a quartz-carbonate-dolomite matrix. Secondary oxidation is variably developed, yielding mainly cerussite (lead oxide) and smithsonite (zinc oxide); tetrahedrite-tennantite has undergone only minor oxidation. Silver is present in solid solution with tetrahedrite-tennantite and to a lesser extent with galena. Veins dip steeply to the east; widths generally vary between less than 0.1 m up to 5 m, with an average horizontal thickness of approximately 2.7 m.

The MQV is the most extensively developed of the known mineral zones. Underground development and diamond drilling have demonstrated the continuity of the MQV over a horizontal strike length of 2.3 km. The MQV trends approximately north-south and dips between vertical and 40º east (average dip is 65º east). It remains open to the north and may continue for a further 4 km to the Rico showing. Diamond d ........


Mining Methods

  • Longhole open stoping
  • Longitudinal retreat
  • Uppers Retreat
  • Paste backfill


Summary:

Prairie Creek will be an underground mine extracting the majority of mineralized material from the steeply-dipping, narrow MQV. Smaller mineralized material quantities will be mined from the STK and SMS zones, generally later in the mine life. Three levels of adits (970 L, 930 L, 883 L) were established previously. Five shrinkage stopes were partly mined above the 930 and 883 levels, giving a stockpile of about 10,000 tonnes of mixed mill feed and waste that is currently located adjacent to the mill.

The MQV zone area covers a strike distance of about 2,100 m and a vertical distance of about 400 m. Below 883 L, mining levels will be established at generally 60 m intervals with 20 m sublevels. Initial stoping will start from the 883 L. As mining on the MQV progresses to depth, mineralized material mined will be supplemented by the STK and SMS zones. Lower levels will be developed to depth through ramp access over the first approximately five years of operation.

Mining will be by Longhole Open Stoping Longitudinal Retreat (LHOS) in the MQV vein and in the STK area. Longhole Upper Retreat Stoping (LUR) will be employed in the SMS area. An average mining rate of 2,400 tonnes per day of mineralized material is projected. At steady-state, approximately 864,000 tonnes of mineralized material per year will be mined. Mine life is projected to be 20.1 years from start-up of the processing plant.

MQV material will be the majority of mill feed producti ........


Crushing and Grinding
Source: Subscription required

- subscription is required.


Processing

Flow Sheet: Subscription required

Summary:

- subscription is required.


Projected Production:

CommodityProductUnitsDailyAvg. AnnualLOM
Zinc Concentrate kt  ......  Subscription required2,283
Zinc Payable metal M lbs 1222,481
Zinc Metal in concentrate M lbs 2,919
Lead Concentrate kt  ......  Subscription required  ......  Subscription required
Lead Payable metal M lbs  ......  Subscription required  ......  Subscription required
Lead Metal in concentrate M lbs  ......  Subscription required
Silver Payable metal koz  ......  Subscription required  ......  Subscription required
Silver Metal in concentrate koz  ......  Subscription required
Zinc Equivalent Payable metal M lbs  ......  Subscription required  ......  Subscription required

Operational Metrics:

Metrics
Daily ore mining rate  ......  Subscription required
Ore tonnes mined, LOM  ......  Subscription required
Daily processing capacity  ......  Subscription required
Tonnes processed, LOM  ......  Subscription required
Annual processing capacity  ......  Subscription required
Annual ore mining rate  ......  Subscription required
* According to 2021 study.
Subscription required - Subscription is required.

Reserves at October 15, 2021:
Mineral Resources are stated at a cut-off grade of 8% ZnEq based on prices of $1.15/lb for zinc, $1.00/lb for lead, and $20/oz for silver.

CategoryTonnage CommodityGrade
Measured 1,031,000 t Zinc 12.6 %
Measured 1,031,000 t Lead 10.3 %
Measured 1,031,000 t Silver 193 g/t
Measured 1,031,000 t Zinc Equivalent 28.7 %
Indicated 8,724,000 t Zinc 9.4 %
Indicated 8,724,000 t Lead 8.6 %
Indicated 8,724,000 t Silver 133 g/t
Indicated 8,724,000 t Zinc Equivalent 22 %
Measured & Indicated 9,755,000 t Zinc 9.7 %
Measured & Indicated 9,755,000 t Lead 8.8 %
Measured & Indicated 9,755,000 t Silver 139 g/t
Measured & Indicated 9,755,000 t Zinc Equivalent 22.7 %
Inferred 6,403,000 t Zinc 12.9 %
Inferred 6,403,000 t Lead 6.7 %
Inferred 6,403,000 t Silver 150 g/t
Inferred 6,403,000 t Zinc Equivalent 24.1 %

Commodity Production Costs:

CommodityUnitsAverage
C1 cash costs Zinc Equivalent USD  ......  Subscription required&nbs
C1 cash costs Zinc USD  ......  Subscription required *†
C3 fully allocated costs Zinc Equivalent USD  ......  Subscription required&nbs
C3 fully allocated costs Zinc USD  ......  Subscription required *†
Assumed price Lead USD  ......  Subscription required&nbs
Assumed price Zinc USD  ......  Subscription required&nbs
Assumed price Silver USD  ......  Subscription required&nbs
* According to 2021 study / presentation.
† Net of By-Product.
Subscription required - Subscription is required.

Operating Costs:

Units2021
UG mining costs ($/t milled) USD 54 *
Processing costs ($/t milled) USD  ......  Subscription required
G&A ($/t milled) USD  ......  Subscription required
Total operating costs ($/t milled) USD  ......  Subscription required
* According to 2021 study.
Subscription required - Subscription is required.

2021 Study Costs and Valuation Metrics :

MetricsUnitsLOM Total
Initial CapEx $M USD  ......  Subscription required
Sustaining CapEx $M USD  ......  Subscription required
Closure costs $M USD  ......  Subscription required
Total CapEx $M USD  ......  Subscription required
UG OpEx $M USD  ......  Subscription required
Processing OpEx $M USD 457
Transportation (haulage) costs $M USD 982
G&A costs $M USD 208
Total OpEx $M USD  ......  Subscription required
Income Taxes $M USD  ......  Subscription required
Total Taxes $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
Subscription required - Subscription is required.


Heavy Mobile Equipment as of October 15, 2021:
HME TypeModelSizeQuantityStatusLeased or
Contractor
Bolter ....................... Subscription required Proposed Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required ....................... Subscription required Proposed
Dozer ....................... Subscription required ....................... Subscription required Existing
....................... Subscription required ....................... Subscription required Proposed Leased
....................... Subscription required ....................... Subscription required Proposed Leased
....................... Subscription required ....................... Subscription required Proposed Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Proposed
Grader ....................... Subscription required Existing
....................... Subscription required ....................... Subscription required Proposed Leased
....................... Subscription required ....................... Subscription required Proposed Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Proposed
Loader (FEL) ....................... Subscription required ....................... Subscription required Existing
....................... Subscription required ....................... Subscription required ....................... Subscription required Proposed Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Proposed Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Proposed Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Proposed
....................... Subscription required ....................... Subscription required Proposed Leased
....................... Subscription required ....................... Subscription required Proposed Leased
....................... Subscription required ....................... Subscription required Proposed Leased
Truck (dump) 20 t ....................... Subscription required Existing
....................... Subscription required ....................... Subscription required Proposed Leased
....................... Subscription required ....................... Subscription required Proposed
....................... Subscription required ....................... Subscription required ....................... Subscription required Proposed Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Proposed Leased
....................... Subscription required ....................... Subscription required Proposed Leased
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Nov 8, 2022
....................... Subscription required ....................... Subscription required Subscription required Nov 8, 2022
....................... Subscription required ....................... Subscription required Subscription required Oct 15, 2021
....................... Subscription required ....................... Subscription required Subscription required Oct 15, 2021
....................... Subscription required ....................... Subscription required Subscription required Nov 8, 2022
Subscription required - Subscription is required.

Staff:

Total WorkforceYear
Subscription required 2021

Corporate Filings & Presentations:

DocumentYear
Corporate Presentation 2022
Corporate Presentation 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
Feasibility Study Report 2017
Press Release 2017
Pre-Feasibility Study Report 2016
Subscription required - Subscription is required.

News:

NewsDate
NorZinc Announces Closing of Plan of Arrangement December 13, 2022

Subscription required - Subscription is required.

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