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United States
Empire Project

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 Location:
5.5 KM SW from Mackay, Idaho, United States

  Project Contacts:
313 E. Custer Street P.O. Box 329
Mackay
Idaho, United States
83251
WebsiteWeb
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Overview

StagePermitting
Mine TypeOpen Pit
Commodities
  • Copper
  • Zinc
  • Gold
  • Silver
Mining Method
  • Truck & Shovel / Loader
Mine Life10 years (as of Jan 1, 2021)


Owners

Source: p. 15
CompanyInterestOwnership
ExGen Resources Inc. 20 % Indirect
Phoenix Copper Ltd. 80 % Indirect
The ownership of Konnex and the Empire Project is characterized by three agreements between ExGen and Phoenix: the Konnex Option dated July 15, 2015, the Supplemental Option Agreement dated November 9, 2016, and Supplemental Option Agreement No. 2 dated April 21, 2017. The terms of these agreements were fully satisfied as of June 29, 2017, establishing Phoenix’s 80% ownership of Konnex Resources, Inc., and ExGen’s 20% interest in the Project.

Contractors

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Deposit Type

  • Skarn
  • Breccia pipe / Stockwork
  • Vein / narrow vein
  • Hydrothermal


Summary:

Mineralization at the Empire Mine is representative of a polymetallic skarn deposit.

Copper-gold-zinc-silver mineralization at the Empire Mine falls into the skarn-hosted, polymetallic deposit type. In fact, historical results and mining records suggest that skarn mineralization at Empire may exhibit depth zonation with copper giving way to zinc and finally tungsten mineralization. The exact process of this zonation is as yet unknown. This skarn has been overprinted by a later epithermal event along pre-existing structures resulting in the gold and silver mineralization encountered.

Both copper-oxide (carbonates, malachite and azurite) and sulphide (chalcopyrite/chalcocite) mineralization is developed to varying degrees within exoskarn in rafted limestone fragments and endoskarn in porphyry. The copper oxide mineralization occurs as veinlets, stockworks, and disseminated oxide/sulphides. The sulphides have similar characteristics, but also occur as massive lenses, both copper sulphides and magnetite, along skarn-hosted fault breccias. In both breccia types, the degree of mineralization appears to be a function of the amount of contained skarn fragments. The copper and iron were apparently introduced into the skarn during the latter stages of the skarnification processes (Chang, 2003). Brittle faulting/shearing and ductile deformation during the skarnification process likely provided the conduits for mineralizing fluids. These conduits may be exemplified ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

There were no constraints on land boundaries, allowing the pit shell and design pit to encompass and capture the majority of the MI&I resources. The PEA-level phased pit design was based on slopes recommended by Call and Nicholas of 45-degrees in the oxide breccia rock type and 51 degrees in all other rock types.

The pit designs are based on PEA-level operating cost assumptions and appear to be consistent with current labour, fuel, reagent, and general processing costs.

Operating costs were calculated assuming CAT 777 trucks and CAT 992 loaders and DM45 production drills. The work schedule assumes two-12 hour shifts per day, 365 days per year at an assumed 92% availability for haul trucks and loaders, and 85% availability for all other equipment.

The PEA mine plan was designed as a series of four phased push-backs to achieve a balanced production of ore and waste rock over the life of the mine. The mine preproduction requirements at the project are minimal given the presence of mineable mineralization near the bedrock surface. The first pit phases are planned near the crusher area to minimize haulage distances at the beginning of the mine life. Waste material from the pit areas will be utilized for construction of the heap leach pad, crusher area and other infrastructure.


Crushing and Grinding
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Processing

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Summary:

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Projected Production:

CommodityProductUnitsAvg. AnnualLOM
Copper Cathode t 8,55058,183
Zinc Metal t  ......  Subscription required  ......  Subscription required
Gold Payable metal oz  ......  Subscription required  ......  Subscription required
Silver Payable metal oz  ......  Subscription required  ......  Subscription required
Copper Equivalent Cathode t  ......  Subscription required  ......  Subscription required
Gold Equivalent Payable metal oz  ......  Subscription required  ......  Subscription required

Operational Metrics:

Metrics
Daily ore mining rate  ......  Subscription required
Ore tonnes mined, LOM  ......  Subscription required
Total tonnes mined, LOM  ......  Subscription required
Annual processing rate  ......  Subscription required
Annual ore mining rate  ......  Subscription required
* According to 2021 study.
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Reserves at October 30, 2020:
Mineral resources are reported at a 0.292% CuEq cutoff. The CuEq is calculated based on the following assumptions: a long-term copper price of US$3.30/lb; gold price of US$1,650/oz; silver price of US$19.25/oz; zinc price of $1.21/lb; assumed combined operating ore costs of US$15.50/t (process, general and administrative and mining taxes); refining costs of $0.10/lb of CuEq; metallurgical recoveries of 85% for copper, 85% for gold; 65% for silver and 60% for zinc and a 2.5% royalty.

CategoryTonnage CommodityGradeContained Metal
Measured 9,138 k tons Copper 0.418 % 76,407 k lbs
Measured 9,138 k tons Zinc 0.219 % 40,039 k lbs
Measured 9,138 k tons Gold 0.327 g/t 87 koz
Measured 9,138 k tons Silver 11.4 g/t 3,032 koz
Measured 9,138 k tons Copper Equivalent 0.81 % 147,749 k lbs
Indicated 16,115 k tons Copper 0.362 % 116,608 k lbs
Indicated 16,115 k tons Zinc 0.176 % 56,689 k lbs
Indicated 16,115 k tons Gold 0.322 g/t 151.4 koz
Indicated 16,115 k tons Silver 9.7 g/t 4,563 koz
Indicated 16,115 k tons Copper Equivalent 0.72 % 233,487 k lbs
Measured & Indicated 25,253 k tons Copper 0.382 % 193,015 k lbs
Measured & Indicated 25,253 k tons Zinc 0.192 % 96,727 k lbs
Measured & Indicated 25,253 k tons Gold 0.324 g/t 238.4 koz
Measured & Indicated 25,253 k tons Silver 10.3 g/t 7,595 koz
Measured & Indicated 25,253 k tons Copper Equivalent 0.755 % 381,237 k lbs
Inferred 11,698 k tons Copper 0.397 % 92,818 k lbs
Inferred 11,698 k tons Zinc 0.137 % 32,123 k lbs
Inferred 11,698 k tons Gold 0.343 g/t 117.1 koz
Inferred 11,698 k tons Silver 7.4 g/t 2,539 koz
Inferred 11,698 k tons Copper Equivalent 0.75 % 174,832 k lbs

Commodity Production Costs:

CommodityUnitsAverage
Cash costs Copper Equivalent USD  ......  Subscription required&nbs
Cash costs Gold Equivalent USD  ......  Subscription required&nbs
Assumed price Zinc USD  ......  Subscription required&nbs
Assumed price Copper USD  ......  Subscription required&nbs
Assumed price Silver USD  ......  Subscription required&nbs
Assumed price Gold USD  ......  Subscription required&nbs
* According to 2021 study / presentation.
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Operating Costs:

Units2021
OP mining costs ($/t milled) USD 17.7 *
* According to 2021 study.

2021 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 331.9
G&A costs $M USD 28.5
Total OpEx $M USD  ......  Subscription required
Total Taxes $M USD  ......  Subscription required
Net 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 @ 7.5% $M USD  ......  Subscription required
After-tax NPV @ 5% $M USD  ......  Subscription required
After-tax NPV @ 10% $M USD  ......  Subscription required
After-tax NPV @ 7.5% $M USD  ......  Subscription required
Pre-tax IRR, %  ......  Subscription required
After-tax IRR, %  ......  Subscription required
Pre-tax payback period, years  ......  Subscription required
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Proposed Heavy Mobile Equipment as of April 19, 2018:
HME TypeModel
Drill (blasthole) ....................... Subscription required
....................... Subscription required ....................... Subscription required
....................... Subscription required ....................... Subscription required
Subscription required - Subscription is required.

Mine Management:

Job TitleNamePhoneProfileRef. Date
....................... Subscription required ....................... Subscription required ....................... Subscription required Jul 20, 2021
....................... Subscription required ....................... Subscription required Subscription required Nov 3, 2022
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Corporate Filings & Presentations:

DocumentYear
Corporate Presentation 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
Preliminary Economic Assessment 2018
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