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Brazil
Antas (Antas North) Mine (Carajás East Operation)

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 Location:
20 km SW from Parauapebas, Brazil

  Regional Office:
Alameda Oscar Niemeyer, 119 – 7th Floor (Office 703) – Vila da Serra
Nova Lima
Brazil
34006-056
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Personnel
  • Filings & News

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Overview

StatusClosing / Closed
Mine TypeOpen Pit
Commodities
  • Copper
  • Gold
Mining Method
  • Truck & Shovel / Loader
Production Start...
Mining at the Antas open pit was completed in June 2021 and it is transitioning into the first hub at Carajás East. Its existing processing plant will continue to be used to process ore from new satellite mines, including Pedra Branca.

Activities focussed on decommissioning the Antas facility through transferring existing tailings to the exhausted mine pit.


Owners

Source: p. 6
CompanyInterestOwnership
OZ Minerals Ltd. 100 % Indirect
OZ Minerals operate the Pedra Branca underground copper mine in the state of Para, within the Carajás East Hub in Brazil.

Contractors

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Deposit Type

  • IOCG


Summary:

In the Carajás Hub, tailings are now deposited in the depleted Antas open pit.

The Antas North iron oxide copper gold deposit is hosted within the Carajás Mineral Province which is located in the southern part of the Amazon Craton. Locally the craton is overlain by metavolcanic–sedimentary units of the Rio Novo Group and the 2.76 Ga Itacaiúnas Supergroup. The Itacaiúnas Supergroup hosts all the known Carajás iron oxide copper gold deposits and is thought to have been deposited in a marine rift environment. The Carajás Mineral Province represents one of the best endowed mineral districts in the world and contains the world’s largest known concentration of iron oxide copper gold deposits including the, Salobo, Igarapé Bahia, Alemão, Cristalino, Gameleira, Furnas, Alvo 118, Antas, Pedra Branca and Pantera deposits.

The Antas North deposit is a structurally controlled iron oxide copper gold deposit which is spatially related to (WNW-ESE) regional shear zones, specifically the Carajás fault and the Cinzento shear system. Mineralisation is hosted within hydrothermal brecciated and altered felsic and mafic volcanic units. Mineralised fluids have been sourced from nearby large granitoid bodies and have been focussed along structural conduits resulting in the deposition of high grade (greater than 10 per cent copper) massive sulfide zones immediately adjacent to or within the interpreted main structural zone. These high-grade massive sulfide zones are commonly 2 ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

Mining of the Antas North open pit was completed in June 2021. The Company will continue to reclaim and process the remaining surface stockpiles into 2022 as the ramp-up and transition to full Pedra Branca feed occurs. The re-purposing of the Antas North open pit void as a tailings storage facility to support the future Carajás East hub operations has commenced. It will be available for use in 2022.


Crushing and Grinding


Processing

Source: Subscription required

Summary:

- subscription is required.


Production:

CommodityProductUnits20202019201820172016
Copper Metal in concentrate M lbs  ......  Subscription required  ......  Subscription required263125
Copper Concentrate kt  ......  Subscription required  ......  Subscription required445140
Gold Metal in concentrate oz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required.

Operational Metrics:

Metrics20212020201920172016
Total tonnes mined  ......  Subscription required7,027,085 t6,497,037 t
Ore tonnes mined  ......  Subscription required  ......  Subscription required468,732 t642,366 t629,026 t
Waste  ......  Subscription required  ......  Subscription required4,849,538 t
Tonnes processed  ......  Subscription required  ......  Subscription required773,602 t708,113 t510,830 t
Subscription required - Subscription is required.

Reserves at June 30, 2022:

CategoryTonnage CommodityGradeContained Metal
Indicated 0.4 Mt Copper 0.8 %
Indicated 0.4 Mt Gold 0.2 g/t
Inferred 1 Mt Copper 0.4 %
Inferred 1 Mt Gold 0.1 g/t
Total Resource 1.3 Mt Copper 0.5 % 6.2 kt
Total Resource 1.3 Mt Gold 0.1 g/t 6 koz

Commodity Production Costs:

CommodityUnits2020201920182017
Credits (by-product) Copper USD  ......  Subscription required  ......  Subscription required -0.47 / lb   -0.43 / lb  
Total cash costs Copper USD  ......  Subscription required†  ......  Subscription required† 1.78 / lb†  
All-in sustaining costs (AISC) Copper USD  ......  Subscription required†  ......  Subscription required† 1.94 / lb†  
C1 cash costs Copper USD  ......  Subscription required†  ......  Subscription required† 1.5 / lb†   1.64 / lb†  
† Net of By-Product.

Financials:

Units2020201920172016
Capital expenditures M AUD  ......  Subscription required  ......  Subscription required
Revenue M  ......  Subscription required  ......  Subscription required 96.4  USD 59.3  USD
Gross profit M 31.7  USD 20.9  USD
Pre-tax Income M 3.3  USD 1  USD
EBITDA M  ......  Subscription required  ......  Subscription required 23.6  USD 16.7  USD



Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Mar 9, 2023
....................... Subscription required ....................... Subscription required Subscription required Mar 7, 2023
Subscription required - Subscription is required.

Staff:

EmployeesContractorsTotal WorkforceYear
Subscription required Subscription required Subscription required 2021

Corporate Filings & Presentations:

DocumentYear
Annual Report 2022
Quarterly Report 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
Quarterly Report 2018
Annual Report 2017
Financial Review 2017
Annual Report 2016
Press Release 2016
Fact Sheet 2014
Subscription required - Subscription is required.

Subscription required - Subscription is required.

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