Anglogold Ashanti Plc · NYSE:AU

Anglogold Ashanti — Technical Presentation (March 2006)

13 slides from Anglogold Ashanti's technical presentation, March 2006

  1. Slide 1: Obuasi Gold Mine - Underground Production

    ASHANTI Goldfields Company Ltd U/G Tonnes Millions 0.0 0.5 1.0 1.5 2.0 2.5 1986 3.0 1987 1988 1989 1990 1991 1992 1993 1994 1995 Obuasi Gold Mine - Ghana 1996 1997 Year 1998 1999 u/g Head Grade (g/t) 2000 2001 u/g 2002 2003 2004 Underground Production 2004 2005 2006 2007 Underground Production - Yea

  2. Slide 2: Underground Productivity

    Obuasi Gold Mine - Ghana Underground Productivity Underground Productivity Ounces/Manmonth Tonnes/Manmonth ASHANTI Goldfields Company Ltd 60 15 50 40 10 Tonnes/Manmonth Ounces/Manmonth 30 20 5 10 0 0 1996 1997 1998 1999 2000 2001 2002 2003

  3. Slide 3: U/G Production Profile

    Obuasi Gold Mine - Ghana U/G Production Profile Obuasi Underground - % change (Mining Methods) 1995-2003 ASHANTI Goldfields Company Ltd % Production Tonnes 100% 80% sublevel prep Vamping 60% Square Set Stope Prep. 40% Pillar Extr. Reclamation Con. C&F. 20% Mech C& F. Sublevel 0% Open Stope 2001 2002

  4. Slide 4: Long Range Plan

    Long Range Plan

  5. Slide 5: U/G Long Term Production Estimate

    Obuasi Gold Mine - Ghana U/G Long Term Production Estimate Obuasi Mine 2003 LRP The tonnage from above 50 3.000 Level, steadily reduces over time. Deeps Phase I is able to ASHANTI Goldfields Company Ltd 2.500 2.000 maintain an overall 2.4 mtpa Ore Tonnes Phase II Deeps rate. Phase II Deeps is foreca

  6. Slide 6: Processing

    ASHANTI Goldfields Company Ltd Processing

  7. Slide 7: Processing

    Obuasi Gold Mine - Ghana Processing SULPHIDE TREATMENT PLANT Material Source- Underground and Surface sulphide ASHANTI Goldfields Company Ltd Capacity - 2.6 million tonnes per annum OXIDE TREATMENT PLANT Material Source- Surface Oxide Capacity – 2.2 million tonnes p/a TAILINGS TREATMENT PLANT

  8. Slide 8: Capital Projects

    ASHANTI Goldfields Company Ltd Capital Projects

  9. Slide 9: Underground Projects

    Obuasi Gold Mine - Ghana Underground Projects  Connection of Sansu Ramp to u/g workings (Block 8/BSVS) ASHANTI Goldfields Company Ltd  Sansu – Surface Fill Raise  Hydrafill Reticulation to Sansu  Deeps Project  BSVS Equipping  Material transfer from North to 41 Level Haulage drive  De-Commiss

  10. Slide 10: Obuasi Mine Geology & Deeps Exploration

    OBUASI MINE GEOLOGY & DEEPS EXPLORATION

  11. Slide 11: AGC Ltd. - Obuasi Operations Ground Holdings

    AGC LTD. - OBUASI OPERATIONS GROUND HOLDINGS Homase Concession Homase AY ILW RA A AN GH LEGEND Roads Obuasi Railway Concession Pits OBUASI SCALE 0 6000 Metres Kubi Kubi Ayanfuri Concession DUNKWA Concession AYANFURI

  12. Slide 12: Legend

    OBUAST Kwasi Hensah t FISSURE) Shaft 77 ali Timber Adansi Shake Shaft = Sor Ww J, Sonsu ae A —— j Shaft —_F —~ASHoNTy . 7 SPI pS %,< DBAS FISSUpp . PE CTE DR Fis, Legend GCS SURE 1 SCALE 75° = Fissure ee a | Auriferous reef D aa LOCA SIRES ‘Dyke’ — Metaovolconic Mineralized Dyke

  13. Slide 13: Section Through Adansi Shaft

    SECTION THROUGH ADANSI SHAFT ADANSI SHAFT 100m OXIDISED ZONE OBUASI FISSURE INSINTSIAM REEF 8 COTE D'OR 0 FISSURE ASHANTI 12 FISSURE -100m 16 20 KE -200m 22 DY E UR 26 ISS Scale F -300m EEF E.T.S. 0 100Metres ORE BODY IN R 30 folded MA S.V.S. phyllite -400m ORE BODY and LEGEND siltstone granulated A

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