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Chile
Escalones Project

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 Location:
97 km SE from Santiago, Chile

  Project Contacts:
2710 – 200 Granville Street
Vancouver
British Columbia, Canada
V6C 1S4
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EmailEmail
WebsiteWeb
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Personnel
  • Filings & News

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Overview

StagePreliminary Economic Assessment
Mine TypeOpen Pit
Commodities
  • Copper
Mining Method
  • Truck & Shovel / Loader
Mine Life19.5 years (as of Jan 1, 2022)


Owners

Source: p. 17
CompanyInterestOwnership
World Copper Ltd. 100 % Indirect
The Project covers an area of 161 square kilometres, of which 1) 46 km2 are covered by 19 exploitation concessions that are the subject of an option agreement between an indirect, wholly-owned subsidiary of World Copper, TriMetals Mining Chile SCM (“TMI Chile”), and a third- party vendor for a 100% interest in and to the concessions (the “Escalones Option”) and 2) 115 km2 are covered by 40 exploration concessions, owned by TMI Chile.

Contractors

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Deposit Type

  • Porphyry
  • Skarn


Summary:

The Escalones Property lies within the Miocene to Pliocene age Pelambres-El Teniente Porphyry copper belt, which hosts the world’s largest underground copper mine at El Teniente, as well as other large copper deposits at Los Bronces-Andina, Pelambres (Katsura, 2006) and Bajo La Alumbrera in Argentina. Copper mineralization at Escalones occurs in two forms: (1) as skarn and lithologically controlled mineralization hosted by altered sandstone/shale and intrusive dikes and sills and (2) as porphyry-style disseminated and stockwork mineralization hosted by an underlying intrusive granodiorite-diorite stock. Rock geochemistry from surface and drill core shows anomalous levels of gold, silver, and molybdenum that are spatially associated with the copper mineralization. This spatial relationship may also be due to separate pulses of mineralization or zoning within a much larger porphyry system.

Porphyry mineralization is associated with moderate to intense potassic alteration (as secondary biotite) in the granodiorite and adjacent hornfelsed sandstone. The metasomatic replacement or skarn-type mineralization is hosted by calcareous, feldspathic sediments, which form an open, upright, north-trending fold cored by the intrusive porphyry system. High-grade copper was historically mined (15 tonnes at 12% copper (Cu) (Katsura, 2006) at Escalones from exposures of magnetite-chalcopyrite skarn at Escalones Alto and prospects along Escalones Bajo. Previous drilling has demonstrat ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

The Escalones Copper Project will employ conventional open mining techniques using front end loaders, hydraulic shovels, and rear dump rigid frame haul trucks. The mineralized material would be treated using heap leach. The mine plan is designed to deliver an average of 50,000 tonnes of heap leach material per day. The average daily waste production rate over the life of the mine would be 54,000 tonnes per day. Waste rock would be placed in a waste rock storage facility.

Pit Design
Ms. Lane of GRE used a triple bench format consisting of triple 10-metre vertical benches with a horizontal 13-metre catch bench every three vertical benches.

Pit Design Parameters:
- Max Inter-ramp Angle Hard Rock - 50 degrees;
- Max Bench Face Angle - 68 degrees.

Haul roads were designed with a minimum width of 34 metres and a maximum gradient of 10%. Haul ramps and roads have been designed to accommodate two-way traffic using 227-tonne haul trucks, water diversion ditches, and safety berms. Minor sections were narrowed to a single lane of 17 metres and a maximum slope of 15%.

Drilling Blasting
The process material and waste rock material would be drilled and blasted using a rotary crawl driller and ammonium nitrate fuel oil (ANFO). The till waste material would not require drilling and blasting.

Loading and Hauling
The blasted rock and till would be loaded with 20-cubic metre capacity front end loaders and hydraulic ........


Crushing and Grinding
Source: Subscription required

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Processing

Flow Sheet: Subscription required

Summary:

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Projected Production:

CommodityUnitsAvg. AnnualLOM
Copper M lbs 1152,246
All production numbers are expressed as cathode.

Operational Metrics:

Metrics
Stripping / waste ratio  ......  Subscription required
Daily mining rate  ......  Subscription required
Daily ore mining rate  ......  Subscription required
Waste tonnes, LOM  ......  Subscription required
Ore tonnes mined, LOM  ......  Subscription required
Total tonnes mined, LOM  ......  Subscription required
Daily processing rate  ......  Subscription required
Tonnes processed, LOM  ......  Subscription required
Annual ore mining rate  ......  Subscription required
* According to 2022 study.
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Reserves at June 25, 2021:
Mineral resources are reported at a 0.13% Cu cutoff.

CategoryTonnage CommodityGradeContained Metal
Inferred 426,198 kt Copper 0.367 % 3,447 M lbs

Commodity Production Costs:

CommodityUnitsAverage
All-in sustaining costs (AISC) Copper USD  ......  Subscription required&nbs
C1 cash costs Copper USD  ......  Subscription required&nbs
Assumed price Copper USD  ......  Subscription required&nbs
* According to 2022 study / presentation.
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Operating Costs:

Units2022
OP mining costs ($/t mined) USD 1.87 *
Processing costs ($/t milled) USD  ......  Subscription required
G&A ($/t milled) USD  ......  Subscription required
Total operating costs ($/t milled) USD  ......  Subscription required
* According to 2022 study.
Subscription required - Subscription is required.

2022 Study Costs and Valuation Metrics :

MetricsUnitsLOM Total
Initial CapEx $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 1,240
G&A costs $M USD 206
Total OpEx $M USD  ......  Subscription required
Mining Taxes $M USD  ......  Subscription required
Income Taxes $M USD  ......  Subscription required
Total Taxes $M USD  ......  Subscription required
Gross revenue (LOM) $M USD  ......  Subscription required
Net revenue (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 @ 8% $M USD  ......  Subscription required
After-tax NPV @ 5% $M USD  ......  Subscription required
After-tax NPV @ 8% $M USD  ......  Subscription required
Pre-tax IRR, %  ......  Subscription required
After-tax IRR, %  ......  Subscription required
After-tax payback period, years  ......  Subscription required
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Pipelines
TypeMaterialDiameterLengthDescription


Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Aug 9, 2022
....................... Subscription required ....................... Subscription required Subscription required Aug 9, 2022
....................... Subscription required ....................... Subscription required Subscription required Aug 19, 2022
....................... Subscription required ....................... Subscription required Subscription required Aug 19, 2022
Subscription required - Subscription is required.

Staff:

Total WorkforceYear
Subscription required 2022

Corporate Filings & Presentations:

DocumentYear
Preliminary Economic Assessment 2022
Preliminary Economic Assessment 2022
Press Release 2022
Subscription required - Subscription is required.

Subscription required - Subscription is required.

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