Skip to content skip to secondary navigation

Materials and waste

EN1

Global Compact ICMM

The information below provides disclosure under the Global Reporting Initiative (GRI) indicator EN1: Materials used by weight or volume

Input materials

The primary raw materials used by the group include the ore processed during the extraction and recovery of gold from its host rock (direct raw materials). Primary process materials used include non-renewable materials such as liquid fossil fuels, lubricants and solid fossil fuels and renewable materials such as cyanide, explosives, acids and alkalis. These bulk materials are used or consumed during gold processing and are relevant to environmental management in that these must be controlled by the operations to avoid environmental impacts. Cyanide is managed under the guidelines provided by the International Cyanide Management Code.

Direct raw materials
Ore processed (kilotonnes) 2011 2010
South Africa 16,418 17,254
Vaal River13,585 14,457
West Wits2,833 2,797
Continental Africa 30,694 29,844
Ghana
Iduapriem4,310 3,391
Obuasi 2,006 2,635
Guinea
Siguiri 11,454 10,328
Mali
Sadiola 4,827 4,371
Yatela4,371 2,933
Namibia
Navachab1,411 1,492
Tanzania
Geita3,863 4,694
Australasia 3,554 3,617
Australia
Sunrise Dam3,554 3,617
Americas 24,256 24,350
Argentina
Cerro Vanguardia1,061 1,001
Brazil
AGA Mineração1,700 1,561
Serra Grande 1,168 1,190
USA
CC&V 20,327 20,598
Group 74,922 75,065
  Liquid fossil fuels (ML) Lubricants (kL)
Process materials 2011 2010 2011 2010
South Africa 1.71 5.99 910 2,440
Vaal River 1.50 4.41 366 1,375
West Wits 0.21 1.58 544 1,065
Continental Africa 233.72 232.79 2,962 3,645
Ghana
Iduapriem22.3319.12-156
Obuasi -2.01NR NR
Guinea
Siguiri 56.2357.39144 93
Mali
Sadiola 8.5546.65 935 886
Yatela 15.6313.42 254421
Namibia
Navachab3.409.1124133
Tanzania
Geita87.5885.11,5061,956
Australasia 42.0630.73NRNR
Australia
Sunrise Dam42.0630.73NRNR
Americas 73.2162.8726062,156
Argentina
Cerro Vanguardia18.7016.06433378
Brazil
AGA Mineração7.055.88561445
Serra Grande 3.593.76196 76
USA
CC&V 43.8737.171,416 1,257
Group 350.69 332.38 6,479 8,241
  Cyanide (t) Explosives (t) Total acid
consumption (t)
Total alkali
consumption (t)
Process materials 2011 2010 2011 2010 2011 2010 2011 2010
South Africa 3,9134,5755,5296,68566,80075,896 46,014 57,275
Vaal River3,0273,6122,7203,27466,22375,317 43,70955,006
West Wits 886 963 2,809 3,411 577 579 2,305 2,305
Continental Africa 13,83112,797 28,03726,653 10,6002,170 81,42551,483
Ghana
Iduapriem1,5941,5947,6406,466489304 4,1013,345
Obuasi3,8883,562--1028741 31,96325,636
Guinea
Siguiri2,9931,5501,3738411,93084 19,55410,899
Mali
Sadiola 1,8602,143 8257,925 6,961698 5,7107,741
Yatela 1,1121,199 1,096213-- 16,92030
Namibia
Navachab638620324899520.716 188300
Tanzania
Geita1,7462,47113,85610,213171.2327 2,9923,532
Australasia 1,3791,4441,3513,9183674418,94312,718
Australia
Sunrise Dam1,3791,4441,3513,918367441 8,94312,718
Americas 4,7954,53128,41727,4581,8291,994 129,709139,268
Argentina
Cerro Vanguardia4444805,9786,7551,2591,359 2,4822,167
Brazil
AGA Mineração3313051,6661,443136169 9,6278,620
Serra Grande5445581,4851,6292523 1,6641,295
USA
CC&V3,4763,18819,28817,631409.21443 115,937115,937
Group 23,91723,347 63,33564,714 79,59580,501 266,093260,744

NR = Not reported


EN2

Global Compact

The information below provides disclosure under the Global Reporting Initiative (GRI) indicator
EN2: Percentage of materials used that are recycled input materials.

Recycled input materials

As a gold mining company, AngloGold Ashanti produces gold, either as a bullion (typically 80-95% gold) or refined (99.5+%) bars, as well as silver and uranium as by-products. These are, by definition, original metal. Owing to the nature of mining, companies use manufactured products, such as steel, fossil fuels, chemicals and explosives, and natural resources, such as water, timber and mined rock, as well as electricity, to produce their commodities. There is therefore limited opportunity to substitute recycled or secondary materials on a meaningful scale, except where suppliers have already incorporated recycled materials into the product, for example, recycled steel into piping, liners and steel balls.

Consequently, measuring the extent of use of recycled input materials is not deemed meaningful.


EN22

Limited Assurance

The information below provides disclosure under the Global Reporting Initiative (GRI) indicator
EN22:
Total weight of waste by type and disposal method

Waste

Hazardous waste (2011)
Tonnes (unless noted otherwise) Battery waste Chemical
and solvent
waste
Fluorescent
lighting
waste
Hydro–carbon
waste (m3)
Other
hazardous
waste
South Africa          
Vaal River Recycle [icon] 5.8 Offsite landfill [icon] 9.7 Offsite landfill [icon] 4.5 Recycle [icon] 64.6 Offsite landfill [icon] 17
        Offsite landfill [icon] 48  
West Wits Recycle [icon] 54.92 Offsite landfill [icon] 3.2 Recycle [icon] 34 Offsite landfill [icon] 16
Continental Africa          
Ghana          
Iduapriem
Obuasi Offsite landfill [icon] 65 Onsite landfill  [icon] 1.43 Recycle [icon] 10,433
  Recycle [icon] 7,064     Offsite landfill [icon] 6.66  
Guinea          
Siguiri
Mali          
Sadiola
Yatela Recycle [icon] 145 Onsite landfill [icon] 171
Namibia          
Navachab NR Offsite landfill [icon] 0.4 Offsite landfill [icon] 15.3
      Recycle [icon] 59  
Tanzania          
Geita Recycle [icon] 605 Offsite landfill [icon] 0.74
          Onsite landfill  [icon] 6.23
Australasia          
Australia          
Sunrise Dam Offsite landfill [icon] 3.9 Offsite landfill [icon] 13 Offsite landfill [icon] 0.27 Offsite landfill [icon] 209.8 Offsite landfill [icon] 0.98
           
Americas          
Argentina          
Cerro Vanguardia Recycle [icon] 294.3 Offsite landfill [icon] 170.4
        Offsite landfill [icon] 452.1  
Brazil          
AGA Mineração Recycle [icon] 18.66 Recycle [icon] 2.15 Recycle [icon] 138.41 Recycle [icon] 222.68
          Onsite landfill [icon] 20 376
Serra Grande Recycle [icon] 1.02 Recycle [icon] 27.56 Recycle [icon] 88.25
USA          
CC&V Recycle [icon] 0.19 Recycle [icon] 0.1 Recycle [icon] 443.49 Offsite landfill [icon] 21.07
  1. Recycle [icon] Note: Recycled
  2. Offsite landfill [icon] Offsite landfill
  3. Onsite landfill  [icon] Onsite landfill
  4. NR= Not reported
Non-hazardous waste (2011)
Tonnes (unless noted otherwise) Ferrous metal waste General waste Non-ferrous metal waste
South Africa      
Vaal River Recycle [icon] 5,519 Onsite landfill [icon]26,535 Recycle [icon] 295.9
    Recycle [icon] 371.2  
West Wits Recycle [icon] 4,941 Onsite landfill [icon]4,554 Recycle [icon] 275.7
    Recycle [icon] 969.34  
Continental Africa      
Ghana      
Iduapriem
Obuasi Offsite landfill [icon] 685 Offsite landfill [icon] 31,119 Offsite landfill [icon] 44.3
Guinea      
Siguiri Onsite landfill [icon]894.54
Mali      
Sadiola
Yatela Onsite landfill [icon]1,152.13
Namibia      
Navachab Recycle [icon] 193 Recycle [icon] 4.2
    Onsite landfill [icon]180  
Tanzania      
Geita Recycle [icon] 6,267 Onsite landfill [icon]3,059
Australasia      
Australia      
Sunrise Dam Offsite landfill [icon] 216.07 Onsite landfill [icon]127
    Offsite landfill [icon] 19.16  
Americas      
Argentina      
Cerro Vanguardia Offsite landfill [icon] 233.8 Recycle [icon] 127
  Recycle [icon] 125.5 Offsite landfill [icon] 648.2  
    Onsite landfill [icon]631.7  
Brazil      
AGA Mineração Recycle [icon] 852.11 Recycle [icon] 45.6 Recycle [icon] 255.23
    Offsite landfill [icon] 398.7  
Serra Grande Recycle [icon] 547.37 Recycle [icon] 310.57 Recycle [icon] 11.57
    Onsite landfill [icon]77.78  
USA Recycle [icon] 336.1 Recycle [icon] 1,073.79
CC&V   Offsite landfill [icon] 1,375  
    Onsite landfill [icon]1.13  
  1. Recycle [icon] Note: Recycled
  2. Offsite landfill [icon] Offsite landfill
  3. Onsite landfill  [icon] Onsite landfill
  4. NR= Not reported

MM3

Global Compact ICMM Reasonable Assurance

MM3: The approach to the management of overburden, rock, tailings, and sludges, residues, including assessment of risks, structural stability of storage facilities, metal leaching potential, and hazardous properties

Total amounts of overburden, rock, tailings, and slimes and their associated risks

We were not able to collate this data in 2011. However, the masses of overburden, tailings, waste rock and sludges should be reported from the 2012 financial year. Various waste materials are produced during the mining cycle. Internal Tailings and Heap Leach Management Frameworks set the standard as well as provide guidance to which tailings and heap leach facilities must be constructed and operated. Internal geotechnical engineers are responsible for ensuring the structural stability of tailings, heap leach facilities and waste rock dumps.

During the design phase, appropriate handling and placement considerations have to be factored into the project design to ensure satisfactory protection of the environment and the safety of neighbouring communities. Risk assessments, environmental impact assessments, stakeholder engagement processes and other studies are used to identify appropriate mitigation measures and controls. During the operational phase, monitoring and audit processes are used to establish trends, identify emerging issues and to ensure conformance to the defined standard operating procedures and operating licence requirements for these various facilities, for example stability assessments, water quality and dust monitoring, hydrogeological and geochemical modelling etc., are carried out to monitor the effectiveness of the design and controls.

Closure considerations are generally defined at the design phase, continually revised throughout and finalised during the operational phase. These controls are then implemented during the closure phase (with appropriate post-closure monitoring).