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Mexico
Cozamin Mine

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 Location:
3 km N from Zacatecas, Zacatecas, Mexico

  Address:
Cerro de San Roberto Ejido Hacienda Nueva Morelos
Zacatecas
Zacatecas, Mexico
98100
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Fleet
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeUnderground
Commodities
  • Copper
  • Silver
  • Zinc
  • Lead
  • Gold
Mining Method
  • Longhole open stoping
  • Paste backfill
Production Start...
Mine Life2031


Owners

Source: p. 5
CompanyInterestOwnership
Capstone Gold, S.A. De C.V. (operator) 100 % Direct
Capstone Copper Corp. 100 % Indirect
Capstone Gold, S.A. de C.V., a wholly owned Mexican subsidiary, owns and operates the polymetallic Cozamin Mine located in Zacatecas, Mexico.

On March 23, 2022, Capstone Mining and Mantos Copper completed the business combination announced on November 30th, 2021. The resulting company was renamed Capstone Copper Corp. (“Capstone Copper”, or “Capstone”). Capstone’s shares continue to be listed on the Toronto Stock Exchange under the ticker symbol “CS”.

Contractors

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Deposit Type

  • Vein / narrow vein
  • Epithermal


Summary:

Deposit Types
All mineralization at Cozamin occurs in veins, and fracture-controlled systems of veinlets. Currently mined mineralization at Cozamin is best described as intermediate sulphidation. The copper-rich intermediate sulphidation mineralization is an early phase that is enveloped, overprinted or brecciated by zinc-rich intermediate sulphidation mineralization. The copper veins are inferred to be higher temperature, have significantly fewer vugs and can be massive pyrrhotite-pyrite-chalcopyrite with little gangue. Zinc-rich veins also tend to be sulphide rich, like the copper-rich ones, but with slightly more gangue. Well-banded quartz, or quartz-carbonate veins are inferred to be lower temperature and best classified as low sulphidation. They often have open space filling textures with quartz druse vug linings and typically gold and silver rich with lesser base metals and are generally not being mined today, but were historically important.

This transition from intermediate sulphidation copper-dominant mineralization to intermediate sulphidation zinc-dominant mineralization is thought to be the result of an evolving, telescoped hydrothermal system. Blocks or fragments of massive chalcopyrite-pyrite-pyrrhotite mineralization enveloped by zinc-dominant mineralization are observed in drill core and in mine workings. This telescoping system is closely associated with the district’s largest center of rhyolite flow domes which may be the shallow expression ........


Mining Methods

  • Longhole open stoping
  • Paste backfill


Summary:

Cozamin uses LHOS as the primary bulk mining method, supported by horizontal drifting to develop the access for stoping. Historically, Cut-and-Fill mining methods and a version of the Modified AVOCA mining method have been employed at Cozamin but are not used in this Mineral Reserve estimate. The LHOS mining method has proven to be a scalable method for use at Cozamin, allowing production to steadily increase since Capstone took ownership. Major levels are separated by sill pillars and extend along strike to each extent of the vein domain being mined.

Longitudinal long-hole open stoping operates along or parallel to the strike of the vein. The orientation of the method means that the hangingwall and footwall of the vein will form the sidewalls of the stope. The method is commonly used in narrow-vein mines where the orebody continues for a large extent along strike and dip. LHOS requires competent rock in the hangingwall and footwall in order to support a large void. As employed at Cozamin, the LHOS method is entirely bottom-up extraction on retreat within stoping panels. Although the method requires high capital development ramp to access the development levels, much of the sublevel development necessary to expose stopes is mined economically as ore production as the cuts can be kept within the vein.

Cozamin backfills each stoping sublevel prior to mining the sublevel above. The backfill used is unconsolidated waste development rock from other areas of t ........


Crushing and Grinding
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Processing

Flow Sheet: Subscription required

Summary:

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Production:

CommodityProductUnits2022202120202019201820172016
Copper Payable metal M lbs  ......  Subscription required ^  ......  Subscription required  ......  Subscription required  ......  Subscription required353530
Copper Metal in concentrate M lbs  ......  Subscription required  ......  Subscription required  ......  Subscription required363732
Copper Concentrate kt  ......  Subscription required  ......  Subscription required  ......  Subscription required636154
Silver Metal in concentrate koz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Zinc Concentrate kt  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Zinc Metal in concentrate M lbs  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Lead Concentrate kt  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Lead Metal in concentrate M lbs  ......  Subscription required  ......  Subscription required  ......  Subscription required
Gold Metal in concentrate oz  ......  Subscription required
^ Guidance / Forecast.
Subscription required - Subscription is required.

Operational Metrics:

Metrics202120202019201820172016
Ore tonnes mined  ......  Subscription required  ......  Subscription required1,143 kt989 kt912 kt996 kt
Tonnes milled  ......  Subscription required  ......  Subscription required1,146 kt986 kt912 kt1,001 kt
Daily milling rate  ......  Subscription required  ......  Subscription required3,140 t2,702 t2,499 t2,736 t
Daily milling capacity  ......  Subscription required  ......  Subscription required
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Reserves at December 31, 2020:
Mineral resources are reported at a cut-off of NSR US$50/tonne.

CategoryTonnage CommodityGradeContained Metal
Probable 13,966 kt Copper 1.77 % 247 kt
Probable 13,966 kt Silver 44 g/t 19,945 koz
Probable 13,966 kt Zinc 0.54 % 76 kt
Probable 13,966 kt Lead 0.21 % 29 kt
Measured & Indicated 29,399 kt Copper 1.52 % 446 kt
Measured & Indicated 29,399 kt Silver 43 g/t 41,016 koz
Measured & Indicated 29,399 kt Zinc 1.1 % 325 kt
Measured & Indicated 29,399 kt Lead 0.32 % 95 kt
Inferred 13,866 kt Copper 0.54 % 75 kt
Inferred 13,866 kt Silver 39 g/t 17,381 koz
Inferred 13,866 kt Zinc 2.23 % 309 kt
Inferred 13,866 kt Lead 0.74 % 103 kt

Commodity Production Costs:

CommodityUnits2022202120202019201820172016
Credits (by-product) Copper USD  ......  Subscription required  ......  Subscription required  ......  Subscription required -0.94 / lb   -0.5 / lb   -0.27 / lb  
All-in sustaining costs (AISC) Copper USD  ......  Subscription required†  ......  Subscription required†  ......  Subscription required† 1.5 / lb†   1.9 / lb†   1.88 / lb†  
C1 cash costs Copper USD  ......  Subscription required ^†  ......  Subscription required†  ......  Subscription required†  ......  Subscription required† 0.75 / lb†   1.16 / lb†   1.48 / lb†  
All-in costs Copper USD 1.9 / lb†   1.88 / lb†  
^ Guidance / Forecast.
† Net of By-Product.
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Operating Costs:

Units2021202020192018201720162015
Total operating costs ($/t milled) USD 43.942.748.549.450.541.742.4

Financials:

Units2022202120202019201820172016
Capital expenditures (planned) M USD  ......  Subscription required
Sustaining costs M USD  ......  Subscription required  ......  Subscription required
Capital expenditures M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 20.1   18.1   10  
Revenue M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 121.2   108.4   72  
Operating Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 39.7   39.5   9  
After-tax Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 24.4   28.2   3.5  
EBIT M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 39.8   39.2   6.6  
Subscription required - Subscription is required



Heavy Mobile Equipment as of October 31, 2020:
HME TypeModelSizeQuantityLeased or
Contractor
Backhoe ....................... Subscription required ....................... Subscription required
Drill ....................... Subscription required ....................... Subscription required
Drill ....................... Subscription required ....................... Subscription required
Drill ....................... Subscription required ....................... Subscription required
Drill ....................... Subscription required ....................... Subscription required
Drill ....................... Subscription required ....................... Subscription required
Drill jumbo (single boom) ....................... Subscription required Leased
Grader ....................... Subscription required ....................... Subscription required
Load-Haul-Dump (LHD) ....................... Subscription required Leased
Load-Haul-Dump (LHD) ....................... Subscription required 4.6 ....................... Subscription required
Load-Haul-Dump (LHD) ....................... Subscription required 3 cu. m ....................... Subscription required
Rock bolter ....................... Subscription required
Rock bolter ....................... Subscription required ....................... Subscription required
Scaler ....................... Subscription required ....................... Subscription required
Truck (haul) ....................... Subscription required ....................... Subscription required
Truck (haul) ....................... Subscription required Leased
Truck (haul) 5 cu. m ....................... Subscription required Leased
Truck (haul) 14 cu. m ....................... Subscription required Leased
Truck (underground) ....................... Subscription required 18 cu. m ....................... Subscription required
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Oct 31, 2020
....................... Subscription required ....................... Subscription required Subscription required Oct 31, 2020
....................... Subscription required ....................... Subscription required Subscription required Nov 21, 2022
....................... Subscription required ....................... Subscription required Subscription required Nov 21, 2022
....................... Subscription required ....................... Subscription required Subscription required Nov 21, 2022
....................... Subscription required ....................... Subscription required Subscription required Nov 21, 2022
Subscription required - Subscription is required.

Staff:

Total WorkforceYear
Subscription required 2017
Subscription required 2016

Corporate Filings & Presentations:

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

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