Objectives and Outline Objectives Geology and controls World-class class characteristics World Outline Significance and history Geologic setting Deposit geology
Location
N Yanacocha Cajamarca
area enlarged
Lagunas Norte
Trujillo Huaraz
Pacific Ocean
CAJAMARCA
Pierina
Otuzco Trujillo j
Lima
LA LIBERTAD
Huamachuco
Lagunas Norte
ANCASH
Pierina Huaraz
Lagunas Norte Snapshot High-sulfidation epithermal
Open pit at 4,000m elevation
4.9Moz produced(1)
Oxide heap leach operation
Grassroots discovery
First production – June 2005
(1) to year end 2009
History of Development 1998: Barrick first interested in area 2000 Sep: Coal concession opened for tender – 15 companies reviewed, only Barrick bid
2001 Feb: Drill program begins 2002 Apr: p Initial resource @ 3.5 Moz 2002 Dec: Reserve @ 6.5 Moz 2004 July: Start construction 2005 Q2:
End of construction
– Cost C t off construction: t ti US$340 M
2005 June: First gold bar 2009 Dec: ~4.9 Moz produced
4.5 years
Importance
In 2009 – 1.01 Moz @ 1.65 g/t – Cash cost US$138/oz – Strip ratio 0.07 (w/o)
Au (M Moz )
Endowment(1) – 6.2Moz contained mined @1.98 gp gpt,, 7.5Moz Reserves @ 1.10 gpt, 0.7Moz Resources (M&I) @ 0.59 gpt – Overall Average Grade 1 1.29 29 g/t Au – In top 5 HS deposits globally
HS deposits >5Moz 60
50
40
30
Barrick 20
10
0
(1) see final slide #1
Production + reserves
Corona
Regional Setting
Minas Conga Michiq.
Cenozoic volcanics over older basement Well-mineralized Well mineralized district
Yanacocha Lagunas Norte Pataz
– Au HS epithermal – Cu-Au C A porphyries po ph ies – Au Mesothermal veins
HS deposits – Mid-Miocene Mid Miocene event – Near edge of volcanics – Near unconformity
50 km CZ intrusion CZ volcanic rock MZ intrusion i t i MZ sediment. rocks PC & PZ basement
Pierina
Deposit Geology
Dacitic - andesitic tuffs domes, tuffs, domes diatreme
Lower Crretaceous s
Unconformity y Chimu sandstone + mudstone, coal
Upp per Jura asic
Mioce ene
Andesitic tuffs, flows, domes
Chicama siltstone, (mudstone, ( d t sands) d )
Diatreme
500 m
Deposit Geometry 5200NW
Deposit Geometry
5200
4200
Host Rocks (sedimentary) 4200NW
Laminated siltstone
200 m
Host Rocks 4200NW B A
200 m
A
B
Host Rocks 5200NW
Unconformity
200 m
Miocene Volcanics
Cretaceous basement
Alteration Typical of HS deposits – Silicification (vuggy) – Alunite ± dickite – Au with silicification
Differences – Lower abundance of alunite-dickite – Limited silicification of sandstone d t – Pyrophyllite in mudstones
Mineralization
Dominant Style
Disseminated 15% & breccias
85%
Fractures & breccias
Grade-Thick. GradeAu (g/t x m) 500 - 1000 250 - 500 125 - 250 75 - 125
Faults
50 - 75 25 - 50
500 m
Mineralization (oxide) In sedimentary rocks
4200NW
Oxide Sulfide
200 m
3.7 g/t Au
Mineralization >0.2 g/t Au Sedimentary rocks Volcanic rocks k
20 cm
2 cm
Mineralization (oxide) 5200NW
In volcanic rocks
Oxide Sulfide 200 m
Mineralization >0.2 g/t Au Sedimentary rocks Volcanic rocks k
Mineralization (sulfide) 4200NW
Oxide Sulfide
200 m Sandstone
Breccia
1 cm
1 cm
Volcanic rock
2 cm
Summary World-class deposit 4.9Moz Prod. + 7.5Moz Reserves(1), flat lying, mainly oxide High production rates, low cost operation
Key aspects of deposit
Associated with diatreme – dome complex Mid Mi Mid-Miocene Near unconformity Mainly l in sandstone d – Subdued alteration footprint – Different mineralization style
(1) see final slide #1
Lagunas Norte - Peru Thank you for your attention
Footnotes 1. Total endowment refers to past production, proven and probable reserves, and measured and indicated resources. Reserves calculated as at December 31, 2009 in accordance with National Instrument 43-101 as required q byy Canadian securities regulatory g y authorities. For a breakdown of reserves and resources byy category and additional information relating to reserves and resources, see pages 23 to 33 of Barrick’s 2009 Form 40-F/Annual Information Form on file with the U.S. Securities and Exchange Commission and Canadian provincial securities regulatory authorities.
