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Brazil
Serra Grande Mine

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 Location:
3 km S from Crixas, Brazil

  Address:
Rodovia GO 336, s/nº - Km 97 Zona Rural
Crixas
Brazil
76510-000
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeOpen Pit & Underground
Commodities
  • Gold
Mining Method
  • Truck & Shovel / Loader
  • Cut & Fill
  • Sub-level stoping
  • Room-and-pillar
Production Start...
Serra Grande comprises three mechanised underground mines, Mina III, Mina Nova and Mina Palmeiras, and an open pit as well as a dedicated metallurgical plant.


Owners

Source: p. 119
CompanyInterestOwnership
AngloGold Ashanti Ltd. 100 % Indirect
Mineracao Serra Grande S.A. (operator) 100 % Direct
Mineração Serra Grande is wholly-owned subsidiary of AngloGold Ashanti.

Contractors

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Deposit Type

  • Vein / narrow vein
  • Orogenic
  • Mesothermal


Summary:

The Serra Grande gold deposits are hosted in a typical greenstone belt sequence. The mineralisation is hosted by metasedimentary and metavolcanoclastic rocks, with quartz veins and massive or disseminated sulphides that have economic potential when controlled by geological structures. Two main deformational events control the mineralisation and have been identified in the region: - The first, a thrusting event (D1 from west to east), developed with irregular thrust ramp geometry. This event was responsible for stacking and inverting the stratigraphic sequences. - The second event (D2), was the thrusting of the Santa Terezinha sequence over the Crixás Greenstone Belt, folding the rocks (F2) and generating the structural controls for gold mineralisation, generally parallel to the fold axis. Deposit type The Serra Grande gold deposit is an orogenic mesothermal deposit, associated with the development of shear zones that belong to the Upper Archaean Crixás Group. Gold mineralisation is associated with metasediments and metavolcanics from the Ribeirão das Antas and Rio Vermelho Formations respectively. The Crixás Greenstone Belt is surrounded by granitic gneiss terrains from the Ribeirão das Antas and Caiamar complexes and metasedimentary rocks from the Santa Terezinha Group, which is part of the Goiás magmatic arc. Mineralisation style The mine is in the Crixás Greenstone Belt sequence, in the central portion of Brazil, and the main host rocks are metasedimentary sequences as ........


Mining Methods

  • Truck & Shovel / Loader
  • Cut & Fill
  • Sub-level stoping
  • Room-and-pillar


Summary:

The Serra Grande operation comprises three underground mines, namely Mina III (including orebody IV, V, and Ingá), Mina Nova (including Pequizão orebody) and Mina Palmeiras. The open pits mine the outcrop of Mina III Inferior and Structure IV zones, and Pequizão. Three mining methods are used underground: sub- level stoping (bottom-up and top-down), cut and fill, and room and pillar. The open pits use standard drill and blast, followed by truck load and haul.


Crushing and Grinding


Processing

Source: Subscription required

Summary:

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Production:

CommodityUnits2022202120202019201820172016
Gold koz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required130133132
Subscription required - Subscription is required.

Operational Metrics:

Metrics202220212020201920182017
Daily milling capacity  ......  Subscription required  ......  Subscription required3,800 t
Plant annual capacity  ......  Subscription required  ......  Subscription required1.5 Mt1.5 Mt1.5 Mt1.5 Mt
Total tonnes mined  ......  Subscription required  ......  Subscription required
Tonnes processed  ......  Subscription required  ......  Subscription required1.5 Mt1.3 Mt1.1 Mt1.4 Mt
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Reserves at December 31, 2022:
Mineral Reserves cut-off grades are 2.13 g/t Au for underground and 1.59 g/t Au for open-pit.

CategoryTonnage CommodityGradeContained Metal
Proven & Probable 7.15 Mt Gold 2.41 g/t 0.55 M oz
Total Resource 38.35 Mt Gold 2.95 g/t 3.64 M oz

Commodity Production Costs:

CommodityUnits202220212020201920182017
Total cash costs Gold USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 660 / oz†   764 / oz†  
All-in sustaining costs (sold) Gold USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 945 / oz†   1,103 / oz†  
All-in costs Gold USD  ......  Subscription required  ......  Subscription required
† Net of By-Product.
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Financials:

Units2022202120202019201820172016
Capital expenditures M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 35   38   43  
Sustaining costs M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 21   18  
Revenue M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 92   95  
Operating Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 21   11  
Gross profit M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 26   15  
EBIT M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 21   12  
EBITDA M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 46   41  
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Water Supply
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Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Jun 22, 2023
....................... Subscription required ....................... Subscription required Subscription required Jul 13, 2023
....................... Subscription required ....................... Subscription required Subscription required Jul 13, 2023
....................... Subscription required ....................... Subscription required Subscription required Jul 13, 2023
....................... Subscription required ....................... Subscription required Subscription required Jun 22, 2023
....................... Subscription required ....................... Subscription required Subscription required Jul 13, 2023
Subscription required - Subscription is required.

Staff:

EmployeesContractorsTotal WorkforceYear
Subscription required Subscription required Subscription required 2022
Subscription required Subscription required Subscription required 2021
Subscription required Subscription required Subscription required 2020
Subscription required Subscription required Subscription required 2019
Subscription required Subscription required Subscription required 2018
Subscription required Subscription required Subscription required 2017
Subscription required Subscription required Subscription required 2016
Subscription required Subscription required Subscription required 2015
Subscription required Subscription required Subscription required 2014

Corporate Filings & Presentations:

DocumentYear
Fact Sheet 2022
Financial Review 2022
Form 20-F 2022
Integrated Report 2022
Other 2022
Other 2022
Year-end Mineral Reserves 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 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
Annual Report 2018
Fact Sheet 2018
Other 2018
Year-end Mineral Reserves 2018
Annual Report 2017
Year-end Mineral Reserves 2017
Annual Report 2016
Corporate Presentation 2016
Year-end Mineral Reserves 2016
Annual Report 2015
Fact Sheet 2015
Year-end Mineral Reserves 2015
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