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Peru
Constancia Mine

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 Location:
52 km NW from Espinar, Peru

  Regional Office:
Av. el Derby Nro. 055 Dpto. 401 (entre Av. Encalada y el Derby)
Santiago de Surco
Peru
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Fleet
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeOpen Pit
Commodities
  • Copper
  • Molybdenum
Mining Method
  • Truck & Shovel / Loader
Production Start...
Mine Life16 years (as of Jan 1, 2021)
The Constancia property also includes Pampacancha, a high-grade satellite copper deposit located only four kilometres from the Constancia mill.

In early April 2021, the company finalized the remaining land user agreement for Pampacancha and gained full access to the site to complete pit development activities. Blasting began in mid-April and first production from Pampacancha was achieved at the end of April.


Owners

Source: p. 20
CompanyInterestOwnership
Hudbay Minerals Inc. 100 % Indirect
Hudbay owns an indirect 100% interest in the property (the Constancia mine), which consists of 36 mining concessions, all of them duly granted by the Peruvian State and recorded in the name of HudBay Peru S.A.C. (“Hudbay Peru”), a wholly-owned subsidiary of Hudbay

Contractors

Subscription required - Subscription is required.


Deposit Type

  • Porphyry
  • Epithermal


Summary:

Constancia mine include the Constancia and Pampacancha deposits

CONSTANCIA
The Constancia deposit is a porphyry copper-molybdenum system which includes copper-bearing skarn mineralization. Multiple phases of monzonites and monzonite porphyry have intruded a sequence of sandstones, mudstones and micritic limestone of Cretaceous age.

The majority of the mineralization is associated with potassic alteration and quartz veining, occurring as chalcopyrite-(bornite)-molybdenite-pyrite mineralization in “A” and “B” type veinlets, and replacing ferromagnesian minerals or filling fractures. Copper grades are highest where fracture-filling style copper mineralization is superimposed on earlier disseminated copper mineralization. The higher-grade hypogene copper mineralization is hosted by a dense A-veinlet stockwork developed in an early porphyry phase. The pyrite/chalcopyrite ratio is typically below 2:1. Molybdenite commonly increases with depth in association to “B” veinlets. Bornite occurs sporadically especially at deeper levels, sometimes associated with some gold values.

Propylitic alteration is transitional to the potassic alteration and extends more than one kilometre from the porphyry intrusive contacts. The propylitic alteration mineral assemblage includes epidote-chlorite-calcitepyrite-rhodochrosite. Subordinate chalcopyrite is also present, filling fractures or replacing mafic minerals. Sphalerite-galena veinlets and veins ar ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

The Constancia mine is an open pit mining operation relying on conventional trucks and shovels. The Constancia ultimate pit design will measure approximately 1.6 km east to west, 1.7 km north to south, and have a maximum depth of around 705 m. The Pampacancha ultimate pit design will measure approximately 0.6 km east to west, 1 km north to south, and have a maximum depth of about 300 m. A primary waste rock facility (WRF), which is located to the south and east of the Constancia pit, is intended to be used for both deposits.

The processing facility is located approximately 1 km west of the Constancia Pit. The NAG waste rock is deposited south of the Constancia pit, while the tailings management facility (TMF) is located 3.5 km southwest of the Constancia pit.

DESIGN CRITERIA
Constancia is mined in nine stages and a two stage pit is planned at Pampacancha. The minimum mining width for each phase is 60 meters; this will allow a shovel, trucks (in two lines) and a drill to work safely and simultaneously.

The haul roads at Constancia and Pampacancha have been designed with a 10% grade and 32 m width for double lane haul roads and 24 m for single lane haul roads.

The final design for waste rock facilyty facility incorporates 20 m high benches with 1.4H:1V (36°) of bench slopes and 32 m wide benches. The overall slope of the stockpile will be about 3.0H:1V (18°). The current remaining capacity of the WRF is estimated ........


Crushing and Grinding
Source: Subscription required

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Processing

Flow Sheet: Subscription required

Summary:

- subscription is required.


Production:

CommodityProductUnits2022202120202019201820172016
Copper Metal in concentrate t  ......  Subscription required ^  ......  Subscription required  ......  Subscription required  ......  Subscription required122,178121,781133,432
Molybdenum Metal in concentrate t  ......  Subscription required ^  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Gold Metal in concentrate oz  ......  Subscription required ^  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Silver Metal in concentrate oz  ......  Subscription required ^  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Copper Concentrate kt  ......  Subscription required  ......  Subscription required  ......  Subscription required513480527
Gold Equivalent Metal in concentrate oz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
^ Guidance / Forecast.
Subscription required - Subscription is required.

Operational Metrics:

Metrics202120202019201820172016
Ore tonnes mined  ......  Subscription required  ......  Subscription required33,308,369 t34,372,156 t29,982,808 t26,519,954 t
Tonnes milled  ......  Subscription required  ......  Subscription required31,387,281 t31,282,610 t28,743,952 t27,032,775 t
Daily milling capacity  ......  Subscription required  ......  Subscription required90 kt90 kt
Daily milling rate  ......  Subscription required  ......  Subscription required86 kt86 kt79 kt74 kt
Subscription required - Subscription is required.

Reserves at January 1, 2021:
Mineral reserves are estimated using a minimum NSR cut-off of $6.40 per tonne.
The open pit resources are using a NSR cut-off of $6.40 per tonne.

CategoryTonnage CommodityGrade
Proven & Probable 532,500,000 t Copper 0.31 %
Proven & Probable 532,500,000 t Molybdenum 89 g/t
Proven & Probable 532,500,000 t Gold 0.066 g/t
Proven & Probable 532,500,000 t Silver 3.04 g/t
Measured & Indicated 260,900,000 t Copper 0.23 %
Measured & Indicated 260,900,000 t Molybdenum 67 g/t
Measured & Indicated 260,900,000 t Gold 0.052 g/t
Measured & Indicated 260,900,000 t Silver 2.27 g/t
Inferred 56,700,000 t Copper 0.27 %
Inferred 56,700,000 t Molybdenum 86 g/t
Inferred 56,700,000 t Gold 0.086 g/t
Inferred 56,700,000 t Silver 2.92 g/t

Commodity Production Costs:

CommodityUnits2022202120202019201820172016
Credits (by-product) Copper USD  ......  Subscription required  ......  Subscription required  ......  Subscription required -0.18 / lb   -0.09 / lb   -0.12 / lb  
Cash costs Copper USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 1.54 / lb   1.37 / lb   1.2 / lb  
Cash costs Copper USD  ......  Subscription required ^†  ......  Subscription required†  ......  Subscription required†  ......  Subscription required† 1.36 / lb†   1.28 / lb†   1.09 / lb†  
^ Guidance / Forecast.
† Net of By-Product.
Subscription required - Subscription is required.

Operating Costs:

Units2021202020192018201720162015
Total operating costs ($/t milled) USD 11.49.469.59.448.838.098.41

Financials:

Units2022202120202019201820172016
Capital expenditures (planned) M USD  ......  Subscription required
Growth Capital M USD  ......  Subscription required  ......  Subscription required
Sustaining costs M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 40   123.8   118  
Capital expenditures M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 42.3   137.8   131.8  
Gross profit M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 240.7  
Subscription required - Subscription is required


Pipelines
TypeMaterialDiameterLengthDescription


Heavy Mobile Equipment as of January 1, 2021:
HME TypeModelSizeQuantityStatus
Bulldozer ....................... Subscription required ....................... Subscription required Existing
Dozer (rubber tire) ....................... Subscription required ....................... Subscription required Existing
Drill ....................... Subscription required 270 mm ....................... Subscription required Existing
Grader ....................... Subscription required ....................... Subscription required Existing
Loader ....................... Subscription required 19 cu. m ....................... Subscription required Existing
Shovel ....................... Subscription required 27 cu. m ....................... Subscription required Existing
Truck (haul) ....................... Subscription required 240 t ....................... Subscription required Existing
....................... Subscription required ....................... Subscription required ....................... Subscription required ....................... Subscription required Proposed
Truck (water) ....................... Subscription required ....................... Subscription required Existing
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Dec 19, 2022
....................... Subscription required ....................... Subscription required Subscription required Dec 19, 2022
....................... Subscription required ....................... Subscription required Subscription required Dec 19, 2022
....................... Subscription required ....................... Subscription required Subscription required Dec 19, 2022
....................... Subscription required ....................... Subscription required Subscription required Dec 19, 2022
Subscription required - Subscription is required.

Staff:

EmployeesYear
Subscription required 2021
Subscription required 2020
Subscription required 2019

Corporate Filings & Presentations:

DocumentYear
Corporate Presentation 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... 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
Corporate Presentation 2018
Management Discussion & Analysis 2018
Press Release 2018
Technical Report 2018
Corporate Presentation 2017
Management Discussion & Analysis 2017
Press Release 2017
Annual Information Form 2016
Corporate Presentation 2016
Management Discussion & Analysis 2016
Form 40-F 2015
Management Discussion & Analysis 2015
Technical Report 2012
Subscription required - Subscription is required.

Subscription required - Subscription is required.

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