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Peru
Hilarion Project

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 Location:
74 km SE from Huaraz, Peru

  Project Contacts:
Av. Circunvalación del Golf los Incas 170 Santiago de Surco
Lima
Peru
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WebsiteWeb
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Overview

StagePreliminary Economic Assessment
Mine TypeUnderground
Commodities
  • Zinc
  • Lead
  • Silver
Mining Method
  • Sub-level stoping
  • Transverse stoping
  • Dry waste backfill
  • Paste backfill
Mine Life16 years (as of Jan 1, 2020)


Owners

Source: p. 38
CompanyInterestOwnership
Nexa Resources S.A. 83.48 % Indirect
Nexa Resources Perú S.A.A. owns 100.0% of the Hilarión project.

Nexa Resources S.A. owns a total of 83.48% in the Project that corresponds to the sum of Nexa’s direct interest in Nexa Perú (0.17%) and Nexa’s indirect interest in Nexa Perú (83.38%) through its controlled company Nexa Resources Cajamarquilla S.A. (99.91%).

Contractors

Subscription required - Subscription is required.


Deposit Type

  • Skarn


Summary:

The mineralization at Hilarión is found in association with a Zn-Pb-Ag skarn system. Skarn mineralization is hosted by contact, metasomatic calc-silicate rocks proximal to intrusive rocks. They typically form by contact metamorphism of a carbonate rich rock.

The Project is located in the Central Andes in Peru. The Central Andes developed as a typical Andean-type orogen through subduction of oceanic crust and volcanic arc activity. The Central Andes includes an ensialic crust and can be subdivided into three main sections which reveal different subduction geometry as well as different uplift mechanisms. The Northern Sector of the Central Andes, which hosts the Project, developed through extensional tectonics and subduction during early Mesozoic times. The sector was uplifted due to compression and deformation towards the foreland. In the last 5 Ma, a flat-slab subduction developed (Peruvian Flat Slab Segment).

The mineralization at Hilarión–El Padrino occurs along the contacts of dikes but also as discrete tabular vertical zones. The zones are elongated parallel to the main northwestsoutheast structures, which is also the direction of most of the dikes. The Hilarión deposit consists of multiple zones that vary from 3 m to 65 m in thickness and from 100 m to 1,500 m along strike.

The alteration and mineralization assemblage at Hilarión–El Padrino show overlapping phases of hydrothermal mineral formation, confirming the typical multi-pulse sty ........


Mining Methods

  • Sub-level stoping
  • Transverse stoping
  • Dry waste backfill
  • Paste backfill


Summary:

The Project contemplates the underground exploitation of the polymetallic Mineral Resources of the Hilarión and El Padrino deposits. This PEA report considers only the mining of the Hilarion deposit, and the El Padrino deposit would be considered in future studies.

Proposed mining methods include Sub-level Longhole Stoping (SLS) with backfill and Transverse Longhole Stoping (TLS), which are suitable for the ground conditions and geological setting of the Hilarión deposit.

The LOM indicates an average overall production rate of 7,800 tpd over the full 16 years of the LOM with a production rate in excess of 10,000 tpd for a ten-year period from year two to year eleven of the LOM. Over the ten-year period at the higher production rate the backfill is split almost 50/50 between the paste fill and loose rock fill. Make-up rock fill will be required as waste rock from mine development will account for approximately 50% of that required. Additional operating costs were included to allow for waste rock from a surface source nearby.

Production ore will be made up of 37% from transverse primary and secondary stopes, 54% from sub-level longhole stopes and 8% from development headings in ore.

The Hilarión Project will be accessed using multiple ramp entry points, a 3 km conveyor tunnel, and a system of internal ramps.

Mineralized material would pass through a primary gyratory crusher located underground prior to being transported to ........


Crushing and Grinding


Processing

Flow Sheet: Subscription required

Summary:

- subscription is required.


Projected Production:

CommodityProductUnitsLOM
Zinc Payable metal M lbs 3,063
Zinc Metal in zinc concentrate M lbs 3,141
Zinc Concentrate kt 2,850
Lead Payable metal M lbs  ......  Subscription required
Lead Metal in lead concentrate M lbs  ......  Subscription required
Lead Concentrate kt  ......  Subscription required
Silver Payable metal oz  ......  Subscription required
Silver Metal in lead concentrate oz  ......  Subscription required

Operational Metrics:

Metrics
Waste tonnes, LOM  ......  Subscription required
Ore tonnes mined, LOM  ......  Subscription required
Total tonnes mined, LOM  ......  Subscription required
Daily processing capacity  ......  Subscription required
Daily processing rate  ......  Subscription required
Tonnes processed, LOM  ......  Subscription required
Annual processing capacity  ......  Subscription required
Annual ore mining rate  ......  Subscription required
* According to 2020 study.
Subscription required - Subscription is required.

Reserves at December 31, 2019:
Mineral Resources are estimated at an NSR cut off value of US$35/t for SLS resource shapes for Hilarión Deposit, and an NSR cut-off value of US$45.00/t for SLS resource shapes and US$50.00/t for R&P resource shapes for El Padrino Deposit.

Mineral Resources are estimated using an average long-term metal prices of Zn: US$2,956.65/t (US$1.34/lb); Pb: US$2,303.14/t (US$1.04/lb); Cu: US$7,523.30/t (US$3.41/lb); and Ag: US$19.61/oz. 4. A minimum mining width of three metres was used for Hilarión and El Padrino.

CategoryTonnage CommodityGradeContained Metal
Measured 24.73 Mt Zinc 3.43 % 847.2 kt
Measured 24.73 Mt Lead 0.72 % 177.3 kt
Measured 24.73 Mt Silver 32.8 g/t 26,107 koz
Indicated 34.23 Mt Zinc 3.61 % 1,237 kt
Indicated 34.23 Mt Lead 0.58 % 197.7 kt
Indicated 34.23 Mt Silver 25.7 g/t 28,326 koz
Measured & Indicated 58.96 Mt Zinc 3.53 % 2,084 kt
Measured & Indicated 58.96 Mt Lead 0.64 % 374.9 kt
Measured & Indicated 58.96 Mt Silver 28.7 g/t 54,433 koz
Inferred 25.34 Mt Zinc 3.52 % 891.2 kt
Inferred 25.34 Mt Lead 0.69 % 174.3 kt
Inferred 25.34 Mt Silver 28.4 g/t 23,144 koz

Commodity Production Costs:

CommodityUnitsAverage
Assumed price Lead USD  ......  Subscription required&nbs
Assumed price Zinc USD  ......  Subscription required&nbs
Assumed price Silver USD  ......  Subscription required&nbs
* According to 2020 study / presentation.
Subscription required - Subscription is required.

Operating Costs:

Units2020
UG mining costs ($/t milled) USD 18.2 *
Processing costs ($/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
UG OpEx $M USD  ......  Subscription required
Processing OpEx $M USD 592.3
G&A costs $M USD 134.1
Total OpEx $M USD  ......  Subscription required
Mining Taxes $M USD  ......  Subscription required
Income 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 @ 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
Subscription required - Subscription is required.

Pipelines
TypeMaterialDiameterLengthDescription


Proposed Heavy Mobile Equipment as of February 14, 2020:
HME TypeModelSizeQuantityLeased or
Contractor
ANFO Loader ....................... Subscription required ....................... Subscription required
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....................... Subscription required ....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required May 17, 2022
....................... Subscription required ....................... Subscription required Subscription required Feb 14, 2020
....................... Subscription required ....................... Subscription required Subscription required Feb 14, 2020
....................... Subscription required ....................... Subscription required Subscription required Feb 14, 2020
....................... Subscription required ....................... Subscription required Subscription required May 17, 2022
....................... Subscription required ....................... Subscription required Subscription required May 17, 2022
Subscription required - Subscription is required.


Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
Annual Report 2015
Other 2014
Subscription required - Subscription is required.

Subscription required - Subscription is required.

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