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Chile
Santo Domingo Project

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 Location:
9 km SE from Diego de Almagro, Chile

  Project Contacts:
Isidora Goyenechea 2800, Office 4103, Las Condes
Santiago
Chile
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Overview

StagePermitting
Mine TypeOpen Pit
Commodities
  • Copper
  • Gold
  • Iron (magnetite)
  • Cobalt
Mining Method
  • Truck & Shovel / Loader
Mine Life18 years (as of Jan 1, 2020)
Scoping level work is being performed by the Santo Domingo and Mantos teams starting in late Q4 2021 to identify and refine potential synergies between the Santo Domingo Project with the Mantoverde mine (owned 70% by Mantos).

The Mantoverde-Santo Domingo synergies study and integration plan is expected in September 2022.

At Santo Domingo, the updated feasibility and mine plan including the cobalt feasibility study is also expected to be released in Q4 2022.


Owners

Source: p. 5
CompanyInterestOwnership
Capstone Copper Corp. 100 % Indirect
On March 24, 2021, Capstone consolidated a 100% ownership interest in 0908113 B.C. Ltd. (“Acquisition Co.”) by purchasing the remaining 30% ownership interest from Korea Resources Corporation (“KORES”), resulting in the elimination of the non-controlling interest (“NCI”) in Acquisition Co. Minera Santo Domingo SCM, a wholly owned Chilean subsidiary of Acquisition Co, holds the Santo Domingo copper-iron project in Chile.

On 23 March, 2022, Mining Corp. (“Old Capstone”) announced the successful completion of transaction combining Old Capstone and Mantos Copper (Bermuda) Limited (“Mantos”), (the “Transaction”). Mantos has been renamed Capstone Copper Corp. (“Capstone Copper”), is headquartered in Vancouver, B.C.

Contractors

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Deposit Type

  • IOCG
  • Vein / narrow vein
  • Skarn


Summary:

Mineralization at Santo Domingo occurs primarily as iron oxide–copper–gold (IOCG) deposits with related vein and skarn bodies.

To date, four deposits, three of which support Mineral Reserves, and a number of prospects have been identified in the Project area.

Santo Domingo Sur
The andesitic flows and tuffs are the primary host to mineralization at Santo Domingo Sur. Mineralization consists of thick semi-massive to massive iron oxide mantos that have replaced the tuffaceous rocks. The stratigraphic sequence of andesitic flows and tuffs dips gently (at an angle of approximately 15°) towards the north–northwest under gravel cover.

Mineralization occurs in the form of copper-bearing semi-massive to massive iron oxide mantos with minor veins and breccias. The mantos are zoned from an outer rim of specular hematite toward a magnetite-rich core.

Drilling has identified a 150 m to 500 m thick, copper-bearing, specularite–magnetite sequence covering an area of approximately 1,300 m by 800 m, and traced to a depth of approximately 525 m below surface. Mineralization consists of stacked chalcopyrite bearing, specularite-magnetite mantos within tuff and tuffaceous sediments overlain by andesitic flows.

The mantos consist of semi-massive to massive specularite and magnetite layers with clots and stringers of chalcopyrite, that range in thickness from approximately 4 m to 20 m. The upper parts of the manto sequence dire ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

The mine is scheduled to work 7 days per week, 365 days per year. Each day will consist of two 12-hour shifts. Four mining crews will cover the operation.

The final pit design was based on a LG shell that used a copper price of $3.00/lb and $100/t for magnetite concentrate. Two pits, the Santo Domingo pit and the Iris Norte pit, were designed. The Santo Domingo pit will have four phases; three mining phases are planned for the Iris Norte pit. These values were used only for mine design not the economic analysis.

A road width of 40 m was selected to accommodate 290 t trucks. NCL used a 10% road gradient which is common in the industry for this type of truck. The current mine plan is designed with 12 m benches stacked to 24 m (i.e. double benching) for the fresh rock material. Mining costs are based on blasting 12 m benches for the waste zones and for the ore.

Additional 40 m wide safety berms were included in the design when the slope height exceeds 100 m at the east wall and 150 m elsewhere and are in accordance with geotechnical recommendations.

The Santo Domingo pit will have two exits on the west side to provide access to the run-of-mine (ROM) pad area and the primary crusher. On the east side there will be another exit to access the main waste rock storage area. The final pit will be 2,200 m long in the north–south direction and 1,500 m wide in the east–west direction. The pit bottom will be at the 676 m elevation. The high ........


Crushing and Grinding
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Processing

Flow Sheet: Subscription required

Summary:

- subscription is required.


Projected Production:

CommodityProductUnitsAvg. AnnualLOM
Copper Concentrate kt 1963,758
Copper Metal in concentrate M lbs 1312,400
Gold Metal in concentrate koz  ......  Subscription required  ......  Subscription required
Iron (magnetite) Concentrate kt  ......  Subscription required  ......  Subscription required

Operational Metrics:

Metrics
Daily milling rate  ......  Subscription required
Daily milling capacity  ......  Subscription required
Waste tonnes, LOM  ......  Subscription required
Ore tonnes mined, LOM  ......  Subscription required
Total tonnes mined, LOM  ......  Subscription required
Tonnes milled, LOM  ......  Subscription required
Annual production capacity  ......  Subscription required
Annual mining rate  ......  Subscription required
Annual milling rate  ......  Subscription required
* According to 2020 study.
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Reserves at February 13, 2020:
Mineral Resources for the Santo Domingo Sur, Iris, Iris Norte and Estrellita deposits are reported using a cut-off grade of 0.125% copper equivalent (CuEq).

CategoryTonnage CommodityGradeContained Metal
Proven & Probable 392.3 Mt Copper 0.3 % 1,167 kt
Proven & Probable 392.3 Mt Gold 0.04 g/t 506.7 koz
Proven & Probable 392.3 Mt Iron (magnetite) 28.2 % 75.1 Mt
Measured & Indicated 537 Mt Copper 0.3 %
Measured & Indicated 537 Mt Gold 0.039 g/t
Measured & Indicated 537 Mt Iron (magnetite) 25.7 %
Measured & Indicated 537 Mt Cobalt 229 ppm
Measured & Indicated 537 Mt Copper Equivalent 0.52 %
Inferred 48 Mt Copper 0.19 %
Inferred 48 Mt Gold 0.025 g/t
Inferred 48 Mt Iron (magnetite) 23.6 %
Inferred 48 Mt Cobalt 197 ppm
Inferred 48 Mt Copper Equivalent 0.41 %

Commodity Production Costs:

CommodityUnitsAverage
Credits (by-product) Copper USD  ......  Subscription required&nbs
C1 cash costs Iron (magnetite) USD  ......  Subscription required&nbs
C1 cash costs Copper Equivalent USD  ......  Subscription required&nbs
C1 cash costs Copper USD  ......  Subscription required&nbs
C1 cash costs Copper USD  ......  Subscription required *†
Assumed price Iron (magnetite) USD  ......  Subscription required&nbs
Assumed price Copper USD  ......  Subscription required&nbs
Assumed price Gold USD  ......  Subscription required&nbs
* According to 2020 study / presentation.
† Net of By-Product.
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Operating Costs:

Units2020
OP mining costs ($/t milled) USD 6.68 *
Processing costs ($/t milled) USD  ......  Subscription required
G&A ($/t milled) USD  ......  Subscription required
Total operating costs ($/t milled) USD  ......  Subscription required
* According to 2020 study.
Subscription required - Subscription is required.

2020 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 2,548
Refining costs $M USD  ......  Subscription required
G&A costs $M USD 402.8
Total OpEx $M USD  ......  Subscription required
Total Taxes $M USD  ......  Subscription required
Royalty payments $M USD  ......  Subscription required
Net revenue (LOM) $M USD  ......  Subscription required
Operating margin (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 @ 10% $M USD  ......  Subscription required
Pre-tax NPV @ 8% $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
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Pipelines
Source: Subscription required


Proposed Heavy Mobile Equipment as of February 19, 2020:
HME TypeModelSizeQuantity
Backhoe ....................... Subscription required
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Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Feb 19, 2020
....................... Subscription required ....................... Subscription required Subscription required Feb 19, 2020
....................... Subscription required ....................... Subscription required Subscription required Nov 1, 2022
Subscription required - Subscription is required.


Corporate Filings & Presentations:

DocumentYear
Press Release 2022
Press Release 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
Corporate Presentation 2018
Feasibility Study Report 2018
Press Release 2018
Annual Information Form 2017
Management Discussion & Analysis 2017
Management Discussion & Analysis 2016
Annual Information Form 2015
Feasibility Study Report 2014
Management Discussion & Analysis 2014
Subscription required - Subscription is required.

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