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United States
Imperial Project

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 Location:
35 km NW from Yuma, California, United States

  Project Contacts:
Suite 970 – 1055 West Hastings Street
Vancouver
British Columbia, Canada
V6E 3E9
Phone  ...  Subscription required
EmailEmail
WebsiteWeb
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Overview

StagePreliminary Economic Assessment
Mine TypeOpen Pit
Commodities
  • Gold
Mining Method
  • Truck & Shovel / Loader
Mine Life7.75 years (as of Jan 1, 2021)
KORE continues to work with the Bureau of Land Management ("BLM") to advance permitting of technical programs and mine development activities at Imperial.


Owners

Source: p. 15
CompanyInterestOwnership
KORE Mining Ltd. 100 % Indirect
The Imperial Gold Project is owned by Imperial USA Corp. (IUC), formerly named, Glamis Imperial Corporation.
In March 2017, Kore Mining acquired Imperial USA Corp. from Newmont Goldcorp for an initial payment of US$150,000, and future payments of US$1,000,000 payable upon the announcement of a revised Preliminary Economic Assessment or similar report, and US$1,000,000 payable 30 days after the date that gold is poured from ore mined from the related properties.

Contractors

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Deposit Type

  • Epithermal


Summary:

The Imperial gold deposit is believed to represent epithermal gold mineralization related to Tertiary-age low angle detachment faults and associated extensional faults. The epithermal gold mineralization is structurally controlled and transitional between low and high-sulphidation systems.

Gold mineralization occurs primarily within haematitic and limonitic altered breccias, microfractures and gouge zones developed in the host biotite gneiss and sericite gneiss units. Minor quartz veining, very-fine grained pyrite pseudomorphs and silicified zones are also common.

The density of fractures, extent of the red-brown to yellow haematitic/limonitic coatings and pyrite pseudomorphs within the host units are notable mineralized features. Logging of coreand cuttings samples from the project site indicated no fresh pyrite or sulphide mineralization is present due to the oxidized state exhibited throughout the deposit.

The deposits were oxidized to a depth in excess of 750 ft indicating that the deposits were oxidized near surface and down dropped by faulting to their current locations.

The majority of gold mineralization occurs stratigraphically above a siliceous breccia horizon. This distinct relationship between the siliceous breccia and the overlying host rock units is traceable across the deposit. Sporadic mineralization is also noted along the cemented gravel and volcanic contacts and in fault structures within the brecciated volcanic ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

The Imperial Mine deposit is planned to be mined using conventional open pit mining methods. The mine design and planning are based on the estimated grade of the resource model and Whittle pit shell analysis.

The mine plan calls for the extraction of run of mine (ROM) potentially economic material from the pits to the heap leach pad at a rate of 12 million short tons per year. The mine plan includes ultimate pit design including ramps and benches, internal phases, production schedule, waste storage, yearly drawings, and capital and operating costs.

Benches are 40 feet in height, matching the block model level sizes. The catch berm on each bench is 23 feet.

The ramp was designed to a 140 feet width. This includes a required 100 feet width based on haul truck operating width multiplied by 4 and an additional 40 feet for wall crumbling in the alluvium. The target grade for ramps is 10%.

WESTEC Inc. (Westec) analyzed the geotechnical properties of the project in a 1997 report. Recommendations from the report assert that the overall pit slopes range from 40°to 50°. When applied to the project, the east pit has an overall slope of 45° in the azimuth range of 115° to 285°, and the west pit has an overall slope of 50° in the azimuth range of 115° to 285°. All other slopes are 40°.

Pit Phases
Initial Whittle analysis showed that high grades could be achieved early on by taking the west pit as one phase, and the east pit in 3 ........


Crushing and Grinding


Processing

Flow Sheet: Subscription required

Summary:

- subscription is required.


Projected Production:

CommodityUnitsAvg. AnnualLOM
Gold koz 1461,167
All production numbers are expressed as metal in doré.

Operational Metrics:

Metrics
Stripping / waste ratio  ......  Subscription required
Daily ore mining rate  ......  Subscription required
Waste tonnes, LOM  ......  Subscription required
Ore tonnes mined, LOM  ......  Subscription required
Annual ore mining rate  ......  Subscription required
* According to 2021 study.
Subscription required - Subscription is required.

Reserves at December 13, 2019:
Reported at a cut-off grade of 0.003oz/t Au using a price of $1,500 /oz Au inside a conceptual pit shell optimized using metallurgical and process recovery of 80%, overall mining costs of $1.40 per ton and processing costs and general and administration costs of $2.30per ton and overall pit slope of 45 degrees.

CategoryTonnage CommodityGradeContained Metal
Indicated 50,379 k tons Gold 0.0174 oz/ton 877 koz
Inferred 100,174 k tons Gold 0.0133 oz/ton 1,336 koz

Commodity Production Costs:

CommodityUnitsAverage
All-in sustaining costs (AISC) Gold USD  ......  Subscription required&nbs
Assumed price Gold USD  ......  Subscription required&nbs
* According to 2021 study / presentation.
Subscription required - Subscription is required.

Operating Costs:

Units2021
OP mining costs ($/ton mined) USD 1.45 *
OP mining costs ($/ton milled) USD  ......  Subscription required
Processing costs ($/ton milled) USD  ......  Subscription required
G&A ($/ton milled) USD  ......  Subscription required
Total operating costs ($/ton milled) USD  ......  Subscription required
* According to 2021 study.
Subscription required - Subscription is required.

2021 Study Costs and Valuation Metrics :

MetricsUnitsLOM Total
Pre-Production capital costs $M USD  ......  Subscription required
Sustaining CapEx $M USD  ......  Subscription required
Closure costs $M USD  ......  Subscription required
OP OpEx $M USD  ......  Subscription required
Processing OpEx $M USD 169.7
G&A costs $M USD 85.4
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
After-tax NPV @ 5% $M USD  ......  Subscription required
After-tax NPV @ 10% $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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Water Supply

Modeling of the heap operation on a monthly basis over the projected mine life indicates that operation of the HLF requires a water supply with an approximate average flow rate of 1,100 gpm (250 m3/hr). An additional 150 gpm (34 m3/h) is required for mine, shop, and office water consumption.


Proposed Heavy Mobile Equipment as of June 10, 2021:
HME TypeModelQuantity
Backhoe ....................... Subscription required
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Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Jun 10, 2021
....................... Subscription required ....................... Subscription required Subscription required Jun 10, 2021
Subscription required - Subscription is required.

Staff:

Total WorkforceYear
Subscription required 2021

Corporate Filings & Presentations:

DocumentYear
Corporate Presentation 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
Subscription required - Subscription is required.

Subscription required - Subscription is required.

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