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Peru
Tres Cruces Project

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 Location:
85 km E from Trujillo, Peru

  Project Contacts:
#1090 – 590 Burrard Stree
Vancouver
British Columbia, Canada
V6C 3B9
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  • Overview
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Overview

StagePreliminary Economic Assessment
Mine TypeOpen Pit
Commodities
  • Gold
Mining Method
  • Truck & Shovel / Loader
Mine Life7 years (as of Jan 1, 2022)


Owners

Source: p. 18
CompanyInterestOwnership
Anacortes Mining Corp. 100 % Indirect
Anacortes holds a 100% interest in the Tres Cruces Mineral concessions through its wholly owned subsidiary, Aurífera Tres Cruces S.A. (ATC).

Contractors

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Deposit Type

  • Breccia pipe / Stockwork
  • Vein / narrow vein
  • Epithermal


Summary:

The Tres Cruces property hosts gold deposits that have characteristics of a low- to intermediate-sulphidation type epithermal system. Epithermal gold-silver deposits are shallowly formed vein, stockwork, disseminated, and replacement deposits that are mined primarily for their gold and silver contents; some deposits also contain substantial resources of lead, zinc, copper, and/or mercury. Epithermal gold-silver deposits range in size from 10,000 to >1 billion tonnes and have gold contents of 0.1 to >30.0 g/t, and silver contents of <1 to several thousand g/t. Although epithermal deposits are commonly known for their high gold grades, many bulk tonnage deposits with as little as 1 g/t gold or less are presently being exploited by open-pit mining.

Gold mineralization at Tres Cruces is mainly associated with pyrite, with occasional traces of other sulphide minerals. The auriferous pyrite is very fine grained, gray to blackish gray (commonly called "fine black pyrite”) and is present as disseminations and in very thin veinlets that locally form areas of stockworks (Macedo et al., 2012). Black pyrite also occurs as rims on earlier pyrite forming a colloform-banded texture. Clemson (Battle Mountain Canada Ltd., Tres Cruces Staff, 1999b) noted colloform-banding for this stage of pyrite, often with repetitive oscillatory bands of sooty and crystalline pyrite. The late-stage black pyrite is directly associated with the main-stage gold event. Early formed, non-gold-bea ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

Preliminary mine designs have been developed for mining oxide and transition mineralization for heap leach processing at the Tres Cruces Oxide Project. The designs and production schedule have been based upon Indicated and Inferred Mineral Resources. The resource model described in Section 14 was imported to Hexagon Mining - Mineplan 3D software where a Lerchs Grossmann algorithm was applied to an NSR model to determine possible pit limits.

The mine plan was developed to mine the oxide and transition mineralization from four phases. The assumed processing rate was nominally 6,000 t/d over seven years. The overall mining rate ramps up from 6 Mt/a to 9 Mt/a in Year 2 of the plan after two years of pre-production stripping. The total mine life is nine years with an overall life of mine strip ratio of 2.89:1.

The mine will be a conventional diesel equipment truck and excavator/wheel loader operation. Waste rock will be placed in a storage facility immediately south of the open pit. A small stockpile will be located immediately adjacent to the primary crusher and used as required to ensure a steady supply of mineralized material to the processing facility.

The Tres Cruces mine will be a conventional excavator/wheel loader operation using 50 t capacity offroad trucks. The bench height will be variable 5 m in mineralized material and 10 m in waste. Designs have been prepared for 10 m single bench between berms. Road allowances have been made f ........


Crushing and Grinding
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Processing

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Summary:

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Projected Production:

CommodityProductUnitsAvg. AnnualLOM
Gold Payable metal koz 478
Gold Metal in doré koz 68481

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
Total tonnes mined, LOM  ......  Subscription required
Daily processing rate  ......  Subscription required
Tonnes processed, LOM  ......  Subscription required
Annual processing rate  ......  Subscription required
* According to 2022 study.
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Reserves at March 14, 2022:
Mineral Resources are estimated at a 0.3 g/t Au cut-off, for oxide and transition material, and at a 0.9 g/t cut-off for sulphide mineralization.

CategoryOreTypeTonnage CommodityGradeContained Metal
Indicated Sulphide 31,132 kt Gold 1.84 g/t 1,844 koz
Indicated Transitional 5,707 kt Gold 1.12 g/t 205 koz
Indicated Oxide 9,636 kt Gold 1.37 g/t 425 koz
Indicated Total 46,475 kt Gold 1.65 g/t 2,474 koz
Inferred Sulphide 1,713 kt Gold 1.55 g/t 85 koz
Inferred Transitional 361 kt Gold 0.6 g/t 7 koz
Inferred Oxide 487 kt Gold 0.75 g/t 12 koz
Inferred Total 2,561 kt Gold 1.26 g/t 104 koz

Commodity Production Costs:

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

Units2022
OP mining costs ($/t milled) USD 9.39 *
Processing costs ($/t milled) USD  ......  Subscription required
G&A ($/t milled) USD  ......  Subscription required
Total operating costs ($/t milled) USD  ......  Subscription required
* According to 2022 study.
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2022 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
OP OpEx $M USD  ......  Subscription required
Processing OpEx $M USD 72.7
Refining costs $M USD  ......  Subscription required
Transportation (haulage) costs $M USD 1
G&A costs $M USD 35.2
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
Net Income (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 @ 0% $M USD  ......  Subscription required
Pre-tax NPV @ 5% $M USD  ......  Subscription required
Pre-tax NPV @ 10% $M USD  ......  Subscription required
After-tax NPV @ 0% $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
After-tax payback period, years  ......  Subscription required
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Proposed Heavy Mobile Equipment as of March 14, 2022:
HME TypeModelSizeQuantityLeased or
Contractor
Dozer (crawler) ....................... Subscription required 346 kW ....................... Subscription required Leased
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Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Mar 14, 2022
....................... Subscription required ....................... Subscription required Subscription required Mar 14, 2022
....................... Subscription required ....................... Subscription required Subscription required Mar 14, 2022
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Corporate Filings & Presentations:

DocumentYear
Corporate Presentation 2022
Preliminary Economic Assessment 2022
Subscription required - Subscription is required.

Subscription required - Subscription is required.

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