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Brazil
Vazante Mine

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 Location:
9 km NE from Vazante, Brazil
  Address:
Rodovia LMG-706 - KM 65
Vazante
Brazil
38780-9000
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WebsiteWeb
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  • Overview
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  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Fleet
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  • Filings & News
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Overview

StageProduction
Mine TypeUnderground
Commodities
  • Zinc
  • Silver
  • Lead
Mining Method
  • Sub-level open stoping (SLOS)
  • Longhole stoping
  • Vertical Crater Retreat
  • Dry waste backfill
Production Start...
Mine Life9 years (as of Jan 1, 2022)
The Vazante Operation consists of two mechanized underground mines, the Vazante Mine and Extremo Norte Mine; and two processing plants, Plant W and Plant C.

The Vazante Operation is one of the largest zinc silicate deposits worldwide.

Owners

Source: p. 41,530
CompanyInterestOwnership
Nexa Resources S.A. 100 % Indirect
Nexa Recursos Minerais S.A. (previously known as Votorantim Metais Zinco S.A.), which is wholly owned by Nexa Resources S.A., owns 100.0% of the Vazante project.

Contractors

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Deposit Type

  • Hydrothermal
  • Carbonate hosted
  • Vein / narrow vein

Summary:

The geology of the Vazante Operation area consists of a sequence of pelitic carbonate rocks belonging to the Serra de Garrote and Serra do Poço Verde formations of the Vazante Group. The currently known mineralization has been traced along a strike length of approximately 10.5 km, extending from the southern end of the Vazante Mine to the northern limits of the Extremo Norte Mine.

MINERALIZATION
The zinc-lead-silver mineralization at the Vazante Operation is hosted by the Vazante Shear Zone which has been traced by drilling and sampling along a strike length of approximately 12 km. The Vazante Shear Zone has a general strike of azimuth 50° and dips approximately 60° to the northwest at surface. The hanging wall lithologies of the Vazante Shear Zone are comprised of dolostone and sericitic phyllite, slates and marl units of the Serra do Poço Verde Formation while the footwall lithologies to the Vazante Shear Zone are dominated by dark grey dolostones of the Upper Morro do Pinheiro Member. Drilling information indicates that the dip of the zinc mineralized zone gradually decreases with depth in the southern portions of the structure.

The zinc mineralization at the Vazante and Extremo Norte mines is composed largely of hypogene zones that are composed mainly of willemite (Zn2SiO4) veins, veinlets, and stockworks that are hosted by sphalerite-rich carbonate. The mineralization typically contains willemite (50% to 70%), dolomite (10% to 30%), siderite ........

Mining Methods

  • Sub-level open stoping (SLOS)
  • Longhole stoping
  • Vertical Crater Retreat
  • Dry waste backfill

Summary:

MINE DESIGN
The Vazante Operation consists of two mechanized underground mines, the Vazante Mine and Extremo Norte Mine, currently operating at a rate of approximately 1.5 Mtpa. The mineralized zones dip between 45° and 70° and the mine extends over a strike length of five kilometres. With the addition of the North Extension, this will increase to approximately 10 km. The Vazante Mine currently extends over a vertical depth of 300 m from surface to the 326 level. The Vazante Mine is being deepened by 186 m to the planned 140 level. There are former open pits along portions of the strike of the Vazante deposit.

There are two access ramps to the Vazante Mine and one to the Extremo Norte Mine. Mine headings range from 5.0 m high by 4.5 m wide ore drives to 6.0 m high by 5.0 m wide main ramps.

The Vazante Operation is designed based upon mechanized longitudinal longhole stoping for areas with a dip greater than 45°. Longhole stopes are developed with footwall access drives parallel to the orebody. Crosscuts are driven from the footwall drive and then the ore is developed along strike. Sublevels are typically 30 m apart though the distance varies depending on the orebody. Long holes are often a combination of downholes or vertical retreat mining (VRM) and uppers or sublevel longhole open stopes (SLOS). Both longhole methods employ a retreat sequence along strike. The SLOS stopes are not backfilled whereas the VRM stopes are backfilled.

Backf ........

Crushing and Grinding
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Processing

Flow Sheet: Subscription required

Summary:

- subscription is required.

Production:

CommodityProductUnits2023202220212020201920182017
Zinc Metal in concentrate t  ......  Subscription required ^  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required140,842135,379
Silver Metal in lead concentrate oz  ......  Subscription required ^  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Lead Metal in concentrate t  ......  Subscription required ^  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Zinc Equivalent Metal in concentrate t  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Zinc Concentrate kt 357349
Lead Concentrate kt  ......  Subscription required  ......  Subscription required
^ Guidance / Forecast.
Subscription required - Subscription is required.

Operational Metrics:

Metrics202220212020201920182017
Daily processing capacity  ......  Subscription required  ......  Subscription required4,400 t4,100 t4,100 t4,100 t
Ore tonnes mined  ......  Subscription required  ......  Subscription required1.62 Mt
Tonnes processed  ......  Subscription required  ......  Subscription required1,622,927 t1,407,199 t1,374,380 t1,321,240 t
Annual processing capacity  ......  Subscription required  ......  Subscription required1.6 Mt
Subscription required - Subscription is required.

Reserves at December 31, 2022:
Mineral Reserves are estimated at a NSR cut-off value of US$ 60.61/t processed. Mineral Reserves are estimated using average metal prices of Zn: US$2,826.35/t (US$1.28/lb); Pb: US$2,043.95/t (US$0.93/lb); and Ag: US$19.93/oz (using an average long term U.S. dollar to Brazilian real exchange rate of 4.96).

Mineral Resources are estimated at various NSR cut-off values appropriate to the mineralization style and mining method. For Supergene Mineralization (Calamine) the resources are estimated at a NSR cut-off value of US$23.13/t for soil and US$28.38/t for fresh rock and transition material. For Aroeira Tailings the resources are estimated at a NSR cut-off value of US$29.40/t and for Hypogene Mineralization (Willeminte) a cut-off value of US$60.61/t for all resources shapes. Forecast long term metal prices used for the NSR calculation are: Zn: US$3,250.31/t (US$1.47/lb), Pb: US$2,350.54/t (US$1.07/lb); and Ag: US$22.92/oz.

CategoryTonnage CommodityGradeContained Metal
Proven & Probable 13.5 Mt Zinc 9.64 % 1,302 kt
Proven & Probable 13.5 Mt Silver 15.2 g/t 6,619 koz
Proven & Probable 13.5 Mt Lead 0.27 % 35.9 kt
Measured & Indicated 4.53 Mt Zinc 6.3 % 285.4 kt
Measured & Indicated 4.53 Mt Silver 8 g/t 1,158 koz
Measured & Indicated 4.53 Mt Lead 0.2 % 9.1 kt
Inferred 15.15 Mt Zinc 9.53 % 1,443 kt
Inferred 15.15 Mt Silver 12.7 g/t 6,184 koz
Inferred 15.15 Mt Lead 0.19 % 29.2 kt

Commodity Production Costs:

CommodityUnits2023202220212020201920182017
Cash costs (sold) Zinc USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 0.38 / lb†   0.44 / lb†  
^ Guidance / Forecast.
† Net of By-Product.
Subscription required - Subscription is required.

Operating Costs:

Units20222021
Total operating costs ($/t milled) USD 47.6  38.8  

Financials:

Units2023202220212020201920182017
Capital expenditures (planned) M USD  ......  Subscription required
Sustaining costs M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 42.4   21.3  
Capital expenditures M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 89.9   55.3  
Subscription required - Subscription is required

Heavy Mobile Equipment as of December 31, 2020:
HME TypeModelSizeQuantity
Bolter ....................... Subscription required
Cable bolter ....................... Subscription required ....................... Subscription required
Drill (long hole) ....................... Subscription required ....................... Subscription required
Grader ....................... Subscription required ....................... Subscription required
Jumbo ....................... Subscription required ....................... Subscription required
Load-Haul-Dump (LHD) ....................... Subscription required 12.5 t ....................... Subscription required
Raise boring rig ....................... Subscription required ....................... Subscription required
Scaler ....................... Subscription required ....................... Subscription required
Scissor Lift ....................... Subscription required ....................... Subscription required
Shotcreter ....................... Subscription required ....................... Subscription required
Trans Mixer ....................... Subscription required ....................... Subscription required
Truck (haul) ....................... Subscription required 30 t ....................... Subscription required
Truck (service) ....................... Subscription required ....................... Subscription required
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required May 25, 2023
....................... Subscription required ....................... Subscription required Subscription required May 25, 2023
....................... Subscription required ....................... Subscription required Subscription required May 25, 2023
....................... Subscription required ....................... Subscription required Subscription required May 25, 2023
....................... Subscription required ....................... Subscription required Subscription required Jun 6, 2023
....................... Subscription required ....................... Subscription required Subscription required May 25, 2023
Subscription required - Subscription is required.

Staff:

EmployeesContractorsTotal WorkforceYear
Subscription required Subscription required Subscription required 2020

Corporate Filings & Presentations:

DocumentYear
Corporate Presentation 2023
Annual Review 2022
Form 20-F 2022
Press Release 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
Annual Report 2018
Form 20-F 2018
Form 20-F 2017
Other 2017
Technical Report 2017
Annual Report 2016
Project Description 2014
Project Description 2013
Other 2006
Subscription required - Subscription is required.

Subscription required - Subscription is required.

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