Overview
| Status | Care and Maintenance |
| Mine Type | Open Pit & Underground |
| Commodities |
|
| Mining Method |
- Truck & Shovel / Loader
- Sub-level stoping
|
| Production Start | ...  |
The Córrego do Sítio, a part of the AngloGold Ashanti Mineração mining complex.
The Córrego do Sítio complex comprises one surface (oxide) and two underground (sulphide) mines, as well as a heap leach pad and sulphide plant.
August 25, 2023 - The Córrego do Sítio (CDS) mine in Brazil’s Minas Gerais state has for a sustained period reported challenging operating results characterised by poor production and costs that remain well above the gold price. The mine has been unable to sustain itself or to fund the capital needed to ensure its long-term future.
AngloGold Ashanti Brasil, a wholly-owned subsidiary of AngloGold Ashanti, has therefore taken the difficult decision to place CDS on care and maintenance. |
Source:
p. 117
| Company | Interest | Ownership |
|
AngloGold Ashanti Ltd.
|
100 %
|
Indirect
|
|
Anglogold Ashanti Corrego Do Sítio Mineracao SA.
(operator)
|
100 %
|
Direct
|
The Corrego do Sitio (CdS) mine is wholly-owned and operated by AngloGold Ashanti.
Contractors
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Deposit Type
- Orogenic
- Vein / narrow vein
- Hydrothermal
- Metamorphic hosted
- Banded iron formation hosted
Summary:
Geology
The Corrego do Sitio (CdS) gold deposit is located in the eastern part of the Lower to Middle Greenschist Facies of the Rio das Velhas Archaean, in the Iron Quadrangle region, on the southern margin of the São Francisco Craton in Brazil.
Deposit type
CdS is an orogenic gold deposit hosted in intensely deformed clastic, volcanoclastic, carbonaceous schists and metagreywackes in an approximately 30km northeast-southwest striking shear zone. Hydrothermal alteration phases associated with the mineralisation are dominated by sericite and carbonate.
Mineralisation style
The CdS I, II and III, gold deposits and associated targets are located in a gold trend that extends for approximately 14km in a north-easterly direction, from Grota Funda (CdS I) in the south to Anomalia (CdS III) in the north, which developed in a compressional tectonic regime. Gold is associated with quartz and fine-grained acicular arsenopyrite. The main gold targets and deposits are distributed over three trends, namely the CdS Trend and Cristina Trend hosted in metasedimentary rocks, and the Donana Trend hosted in BIF.
At CdS I, the main orebodies are Rosalino, Cachorro Bravo, Laranjeiras and Carvoaria, which constitute the current production sources and most of the Mineral Resource. At CdS II, the main orebodies are São Bento, Pinta Bem (both BIF-hosted) and Sangue de Boi (metasedimentary-hosted). At CdS III, where limited exploration has taken place, the Anomalia I orebodies are the best understoo ........
Mining Methods
- Truck & Shovel / Loader
- Sub-level stoping
Summary:
The Corrego do Sitio (CdS) complex is located in the municipalities of Santa Barbara and Barão de Cocais in Minas Gerais State, in the southeast of Brazil and consists of open pit and underground mines.
The underground mining method for CdS is sub-level stoping. Each panel consists of three levels with secondary development drives that range from 100 to 600m along strike. The stopes are around 15m high and the mining sequence method varies between top-down and bottom-up, which is only used in specific areas. Geotechnical parameters require that sill pillars are 4 to 7m high, and rib pillars 5m wide. The access into CdS I underground is by decline, and access into CdS II underground is by shaft.
The open pit operation uses conventional bench mining, with a bench height of 8m (mined in 4m flitches) and 3.2m berms. The material transport (ore and waste) is done by trucks and the excavation by a back-hoe loader. The rock breaking method varies according to the rock hardness, using either explosives or mechanical excavation.
Source:
p.5-6
Source:
- subscription is required.
Flow Sheet:
Summary:
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Combined production numbers are reported under
AGA Mineracao Operation
Operational Metrics:
| Metrics | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 |
|
Plant annual capacity
| ...... | ...... | 1.6 Mt | 1.6 Mt | 1.6 Mt | 1.1 Mt |
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Reserves at December 31, 2022:
Reserves cut-off grades are 3.27 g/t Au for underground and vary from 0.31 to 1.35 g/t Au for open-pit depending on deposit and ore type. Cut-off grades for stockpiled ore are 0.30 g/t Au (oxides), 0.30 g/t Au (transitional) and 3.27 g/t Au (sulphide).
| Category | Tonnage | Commodity | Grade | Contained Metal |
|
Proven & Probable
|
3.37 Mt
|
Gold
|
3.84 g/t
|
0.42 M oz
|
|
Total Resource
|
35.84 Mt
|
Gold
|
3.8 g/t
|
4.37 M oz
|
Source:
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Corporate Filings & Presentations:
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