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THE TELFER GOLD INTRODUCTION Marco Zolezzi – General Mana

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  • 1THE TELFER GOLD MINE

    INTRODUCTION

    Marco Zolezzi General Manager

  • 2UNDERGROUND

    SHAFT SYSTEM Sinking and Lining completed 28 Feb 05 Cable equipping completed 23 Mar 05 Winder building, winder and sky shaft installation commenced

    UNDERGROUND FIXED CAPITAL PLANT Civil contract awarded Mechanical and electrical bids received and under evaluation

    From Telfer To: Direct km

    Nifty 70

    Woodie Woodie 110

    Gregory Range 110

    Marble Bar 270

    Newman 320

    Port Hedland 450

    Perth 1,300

  • 3Telfer Gold Mine Licence to Operate

  • 4Telfer Safety LTIFR of 3.9. (0.98 injuries per 100 employees) Our approach to safety is forward looking and

    involves engaging with the workforce (Target Zero) Safety Behaviour Observations (SBOs) one per week for

    all trained personnel. Close out of investigations after three weeks 100%. Close out of corrective actions after four weeks 100%. Six Target Zero working groups operational with employee

    participation. Ensuring contractor participation in our safety programs

  • 5Environmental Overview

    Environmental Management at Telfer Gold Mine includes; The Port Hedland Copper concentrate facility The Port Hedland to Telfer Gas Pipeline Telfer Gold Mine itself

  • 6Environmental Overview

    Port Hedland Copper Concentrate Facility Includes an Environmental Management Plan (EMP) that addresses mostly dust,

    waste water and clean up post loading Recent upgrades to improve environment include internal dust extraction

    upgrades, installation of man cooler fans, and industrial strength roller doors

    PH to Telfer Gas Pipeline Operated and environmentally managed by Gasnet Transmission services (WA) Fibre optic cable installation, via Telstra, scheduled to commence mid July 2006

  • 7Telfer Gold Mine Environmental Mgt Mine lease conditions current. Recent DoIR audit highlighted ARD management as

    major issue and sighted R&D work associated with rehabilitation as positive Site wide Environmental Risk Assessment conducted October 2005. All issues

    identified are actioned through each departments EMP (1 implemented, and 4 pending). Level III and IV risk has capital plan

    Environmental Non-compliances

    No Cat III or IV incidents for 2005/2006

  • 8Environment Programs New 6 year plus Class II landfill commissioned New waste transfer and recycling area fully operational; recyclables to

    date includes 20 m3 of Al, 447 m3 of cardboard and 120 m3 of scrap steel (last two months of data). 15% of revenues donated to charity. WA govt. vision is for zero waste 2020

    Dingo Management Plan nominated for DoIR Golden Gecko award Wildlife Hospital and partnership with Kanyana - nominated for DoIR

    Golden Gecko award

    Mesa landform for closure (possible Banksia award)

  • 9Native Title/Community

    Mine Site & Infrastructure Corridor Agreements with Native Title Groups

    MOU & Community Benefits Agreement in place with Traditional Owners - Martu

    Community Programs with Martu Agreements Implemented, WIP Training and Employment Opportunities

  • 10

    Native Title / Community

    Training commenced annual programs Employment skills register Contracting opportunities for existing business Business Development setting up new business Cultural Awareness presented by Martu Community programs with Town of Port Hedland ,

    Government & Others

  • 11

    Telfer Today

  • 12

    Planned PitMAIN DOME

    Planned PitWEST DOME

    1 km

    Telfer Tomorrow

  • 13

    The Telfer Re-Development Open pit mine to produce 13-15 million tonnes of ore/annum Underground mine to produce 4 million tonnes of ore/annum Twin train concentrator to treat 17-19 million tonnes of

    ore/annum to produce gold dore and copper/gold concentrate. 120Mw Gas fired power station with gas pipeline from Port

    Hedland Ancillary services & utilities to support the mining &

    treatment plant operations Upgrades to Telfer access road and village accommodation

  • 14

    Telfer Gold Mine Statistics

    Ore Reserve* of 17 million ounces of gold

    Ore Resource* of 26 million ounces of gold

    23 year operating life based on ore reserve

    Average annual production

    770,000 ounces of gold

    27,800 tonnes of copper

    Operating workforce 1100 people

    * Resources & Reserves as at 30 June 2005

  • 15

    Telfer Project ProgressOpen Pit Mine- Operating Commenced stripping Operations in May 2003 Supplying ore to the plant at 21Mtpa 05/06 Planning 15Mtpa 06/07Underground Mine - Developing Delays in commissioning the underground mine Expect 4 Mtpa rate by 4th Quarter 2006/07Concentrator In Production First ore train commissioned in Nov 2004 Second ore train commissioned in Feb 2005 Both trains exceeded design capacity in less than a month

  • 16

    Successes Challenges Open Pit Mine exceeds

    Feasibility Targets Concentrator exceeds

    Nameplate Capacity Concentrate Marketability

    Arsenic and Cobaltite Gravity Gold Recovery

    (25%)

    Supergene Reserve Grade (Minimal Impact on LOM) Delayed Underground Mine Skill Shortage and Staff Turnover

  • 17

    Human Resources Key Issues Experienced operations management team in place New employees recruited job ready Federal Australian Workplace Agreements implemented for

    employees Use of contractors in specialist areas Turnover 2005/06 ~30% (Prior year ~40%) Recruitment of Skilled Employees Focus Group improve roster and reviewed remuneration

  • 18

    THE TELFER GOLD MINE

    Key Statistics2005/06

  • 19

    Open Pit - 2005/06 ProductionActual Feasibility

    Ore Mined Mtn 22.1 15.5

    Dump Leach Mined Mtn 0.7 1.1

    Waste Mined Mtn 23.9 30.2

    Total Material Mined Mtn 46.7 46.8

    LOM Strip Ratio 2.87

  • 20

    Ore Processing Full Year 2005/06Actual Feasibility

    Open Pit Ore Milled Mtn 20.2 15.5

    Underground Ore Milled Mtn 0.2 3.1

    Total Ore Milled Mtn 20.4 18.6

    Dump Leach Ore Treated Mtn 0.0 1.3

    Total Ore Treated Mtn 20.4 19.9

    Milled Grade Cu % 0.28 0.34

    Gold Recovery % 81.0 92.0

    Milled Grade Au g/t 1.18 1.81

    Copper Recovery % 66.6 82.7

  • 21

    Ore Processing Full Year 2005/06 Gold Production

    Actual Feasibility

    Open Pit koz 640 682

    Underground koz 10 316

    Total Concentrator koz 650 998

    Dump Leach koz 0.0 19

    Total Gold Produced koz 650 1,017

  • 22

    Ore Processing Full Year 2005/06 Copper Production

    Actual Feasibility

    Open Pit Ktn 37.8 36.7

    Underground Ktn 0.6 19.8

    Total Copper Produced Ktn 38.4 56.5

  • 1TELFER ORE PROCESSING

    Mike Nelson Ore Processing Manager

  • 2Ore Processing - Introduction Concentrator originally designed to process 17-19Mtpa

    Two trains of processing 15 Hectare site (15 times the footprint of the old Telfer

    concentrator) Conventional Processing technology used

    Crushing SAG and Ball mill with recycle crushing (SABC) Flotation circuit, (150 m3 tank cells) Leaching circuit for pyrite concentrate Copper concentrate and bullion produced on site

    Copper concentrate trucked to Port Hedland for shipping. Single circular tailings dam

    490 Hectare area Sufficient for Life of Mine (with wall lifts throughout life)

  • 3Ore Processing

  • 4

  • 5Ore Processing - Overview Continued to maintain a high environmental and safety

    performance.

    Milled tonnage continues to exceed feasibility FY05 throughput of 8.8Mt at an operating time of 75.5% FY06 throughput of 20.6Mt at an operating time of 90.9% FY07 forecasts similar throughputs with continuing improvement

    in operating times allowing for harder underground ore.

    Pyrite leaching circuit commissioned Feb 2006, and first major campaign on sequential ore from underground and Open Pit planned for August 2006.

  • 6Ore Processing - Overview Overall recovery of gold and copper lower than feasibility,

    influenced by; Supergene ore grade Ore treatment mode Copper concentrate grade requirements

    Gravity Recovery remains lower than feasibility Intensive Leach Reactor successfully commissioned Grind size in upper ores contributing to finer gold production

    which is less efficiently recovered in primary gravity units Initial trials on changing feed source to primary gravity units

    shows promise

  • 7Ore Processing - Overview Reduction of Arsenic in concentrate shows good progress

    FY06Q4 showed a reduction to 28% of high-grade Arsenic concentrate

    Increased proportion of underground ore in FY07 will assist in increasing the proportion of concentrate with low Arsenic.

    Two Concentrates pilot trials complete and successful. Was usedto treat one train in Q4 and significantly contributed to the lower amount of concentrate at high Arsenic levels.

  • 8Ore Processing Cost Distribution FY06

    0%

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    FY06 Costs = $6.36/tonne milled

  • 9Metallurgy Focus FY07 Pyrite Leaching

    Underground and lower Open Pit sulphidic ores to be treated in sequential mode from August 2006.

    Sequential flotation: A separate copper concentrate and pyrite concentrate produced Pyrite concentrate is leached and recovered gold is shipped as dore Expect 10-15% of the gold in these ores to be recovered via pyrite leach.

    Leaching circuit optimisation Cyanide consumption will be a key economic driver of the leach circuit

    Have involved external experts including CSIRO to assist in optimisation of the circuit leach chemistry.

    Circuit has been proven in terms of throughput capacity earlier this year.

  • 10

    Metallurgy Focus FY07 Recovery

    Gold Recoveries have been lower than feasibility Ore treatment route

    Four main treatment routes bulk float, copper only, pyrite only, sequential Majority of ore treated in FY06 has been upper Open Pit ore (supergene),

    planned to be treated as a bulk float ore. Copper-only mode has been used predominantly due to higher concentrate

    grade targets. Use of cyanide to depress pyrite in this ore, and a specific copper

    collector to float off copper minerals As a result, gold and copper recovery (associated with pyrite) have

    suffered. FY07 will see an improved recovery of gold and copper due to normalisation of

    production reducing the amount of copper only treatment.

  • 11

    Metallurgy Focus FY07

    Gravity Gold Target gold to gravity has been 40%. But achieving closer to 25%.

    Gold distribution to flotation has been much higher than feasibility 75% of gold in concentrate is liberated of which 25% is gravity

    recoverable.

    Oxidised and softer Supergene ores have led to overgrinding, and slimes generation

    Reducing potential to recover to gravity (gold too fine) Over 80% of the gravity recoverable gold in concentrate is flattened

    and is less effectively recovered in Knelson/Falcon centrifugal concentrators.

  • 12

    Metallurgy Focus FY07

    Gravity Gold Actions taken to date

    Intensive Leach Reactor (ILR) installed to leach gold room tails Prevents this stream entering final concentrate ILR available to leach other high grade low mass streams

    Mobile gravity units (two 30 Knelson concentrators) Trial done on final concentrate stream

    Lower recoveries than expected (flat gold escaping?)

    Primary gravity unit performance (Falcon concentrators in grinding) Improved availability (wear issues have been significant) Ordered fourth unit for each train to increase recovery

  • 13

    Metallurgy Focus FY07 Gravity Gold

    Actions still to take Trial mobile Knelsons on other flotation streams

    Primary gravity recovery Install and commission fourth Falcon per train (H1, FY0607) Trial cyclone underflow to these units rather than cyclone feed as

    designed and current configuration. This currently underway on one train Results are encouraging May result in utilising cyclone underflow as feed to gravity units

    rather than cyclone feed.

  • 14

    Metallurgy Focus FY07 Gravity Gold

    Actions still to take Further optimisation to minimise overgrinding of ore and gold particles.

    Coarsen grind in SAG mill (only by varying level of grinding media)

    Coarsen grind in ball mill (by reducing amount of grinding media or increasing size of grinding media)

    Potential to decrease Open Pit powder factors on softer ores

  • 15

    QUESTIONS & ANSWERS

  • May 2006All rights reserved Newcrest Mining Ltd

    TELFER OPEN PIT

    Steve Batman Open Pit Manager

  • May 2006All rights reserved Newcrest Mining Ltd

    Open Pit Operations - Introduction

    2 pits: Main Dome & West Dome Commenced mining in the Main Dome Main Dome dimensions 3km x 1.5km x 650m Open pit has mined 136 Mt since May 2003 Current depth 180m

  • May 2006All rights reserved Newcrest Mining Ltd

    T e l f e r P r o j e c t J u n e 2 0 0 3 2

    M i n i n g S t a g e s F i r s t 4 Y e a r sM I N E S C H E D U L I N G

    Open Pit Mine Schedule

  • May 2006All rights reserved Newcrest Mining Ltd

    Total Tonnes by Mining Stage

    0.0

    1.0

    2.0

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    6.0

    1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

    Production Month

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    Stage 4Stage 3Stage 2.3Stage 2.2Stage 2.1Stage 2Stage 1

    Mine Scheduling

  • May 2006All rights reserved Newcrest Mining Ltd

    Open Pit Fleet

    Newcrest owned fleet workforce of 160 operators

    Contract Maintenance (Westrac & Leibherr)

    19 Caterpillar 793 Haul trucks, 4 more to be delivered

    Liebherr - 2 995 Excavators and 1 996 Face Shovel, 2nd 996 ordered as an Excavator

    3 Driltech D75K Blasthole drills and 1 Pantera 1500 on site, A New D55SP (Single Pass) to be delivered.

    Moving towards a longer term hire agreement on the small fleet.

  • May 2006All rights reserved Newcrest Mining Ltd

    Strategy to Minimize Dilution and Ore Loss

    Mining method utilised has changed from initial bulk mining to selective mining at high production rates

    Planning Allowing maximum mining width through areas to prevent tight spots that force poor technique

    Digging direction From Hanging wall to Footwall

    Digging direction Mining squarely across the boundary

    Size of Block mark out and orientation for machine size

    Correct Block number entered in Dispatch

  • May 2006All rights reserved Newcrest Mining Ltd

    M10 exposed

  • May 2006All rights reserved Newcrest Mining Ltd

    Digging direction

    ORE

    WASTE

    CONTACT

    Rill angle will approximate ore\waste contact

    CORRECT DIGGING DIRECTION

  • May 2006All rights reserved Newcrest Mining Ltd

    Digging direction

    ORE

    WASTE

    INCORRECT DIGGING DIRECTION

    RILL SLOPE

    ORE LOSS

  • May 2006All rights reserved Newcrest Mining Ltd

    Example - Focus for Operators

    Dozing direction and timing Dozing should always be done north-south Dozer and digger operators need to communicate with each

    other the best time for floor cleanup i.e. if ore block already faced up, dont push waste into it.

    Sheeting Ore zones should not be sheeted Sheeting can be carried out, but only after consultation with a

    geologist

  • May 2006All rights reserved Newcrest Mining Ltd

    Dilution Due to Blasting

    Blast MovementIssue : Blast Movement monitoring to assist dilution reduction.

    Actions : To measure and define the direction of Blasting Movements inproduction blasting.

    All blasting is semi-parallel to strike of Ore body, unless approved by Mining Manager.

    Looking at blast vector indicators (BVIs) for a large trial.

    Supplied from JKTech. System has shown 1-3 m of horizontal movement. More senders on order

  • May 2006All rights reserved Newcrest Mining Ltd

    BMT Unit

  • May 2006All rights reserved Newcrest Mining Ltd

    Production Costs Open Pit2005/06 Telfer Open Pit Costs

    $2.10 per tonne mined

    0.0%

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    30.0%

    Westrac Liebherr Diesel Labour Tyres BulkExplosives

    GET Lubes

    Cost Center

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  • May 2006All rights reserved Newcrest Mining Ltd

    The Bottom Line

    To continue to feed the mill at 45-50 ktpd at a strip ratio of 2.87:1 ( Stage 3) requires a Mining Rate of 175 to 194 ktpd

    Transitioning into Stage 4 next July requires 225 to 250 ktpd.

    Improvements are being implemented in multiple areas and additional equipment is being delivered (4 Trucks Currently)

  • May 2006All rights reserved Newcrest Mining Ltd

    Operating Improvements

    Mining Production Rates Quick Shift Change has been well accepted and improved truck

    utilisation. Additional Capacity to be Added

    4 x 793 Cat Haul Trucks 1 x 996 Excavator

    Dump Optimization Using results of Dump Solver for operating costs savings

    Refuelling Near Pit Refuelling system purchased. Reduces delays.

  • May 2006All rights reserved Newcrest Mining Ltd

    QUESTIONS & ANSWERS

  • 1Telfer Underground

    Grant Davidson Chief Underground Transition Manager

  • 2Shaft, to 1126m @ 7m dia loading stn at 1100m,

    6.5 Mtpa Two exhaust shafts

    4.5m dia, centrifugal fans

    Gyrator crusher; 54x74 Metso

    Truck loading chutes; 2 commd, 6 in total

    Main Pumps; 3 Apex, total installed

    capacity of 135 l/sLevel interval 25m

    X-cut at 14m centres

  • 3Exhaust system

    complete (red)

    Crusher has been

    commissioned

    Shaft requires a sheave shaft change out for statutory compliance,

    18 days shutdown

    Undercut

    Mining undercut and second level

    2nd Level

    2 of 6 ore passes with truck chutes

    are being commissioned

    (yellow)

    East

    West

    ShaftCooled intake airway & hoisting

    VR10Exhaust

    VR 11Exhaust

    Decommissioned

    0 50 100

    Scale, metres

  • 4Comparison with RidgewayTelfer Deeps Characteristics: Differences with Ridgeway:

    Immediate production ramp up post commissioning of hoisting system

    Undercut extracted prior to commissioning ore handling system

    Longer strike length; 50+ cross cuts 20 cross cuts

    High grade in reefs with surrounding stockworks,39Mtonnes, Au 2.7g/t, Cu 0.50%

    Porphyry; at the end of Feasibility, 32Mtonnes, Au 2.7g/t, Cu 0.76%

    Starting depth; undercut at 850m Undercut at 500m

    Open pit interaction No open pit interaction

    LHD/truck haulage/hoisting/conveyor LHD/LHD/conveyor

  • 5Changes since Oct 2003 analyst visit

    New portal proposed from the western side of the open pit did not proceed New decline to surface completed; decoupled UG/Operations

    Infrastructure/access to the SLC established on the east; Retains potential of mineralisation to the west of the SLC

  • 6Mining Contractor Change Over

    Mining targets were not being met under previous contract arrangement

    Alliance agreement established with Byrnecut (BCM) September 2005 Offers Newcrest greater flexibility Confident that operating targets can be achieved in 06/07

    Results so far; Integrated scheduling & co-ordination, improved development

    performance Reduced workforce turn over

    Underground site numbers; 330 NCM 40, BCM 231, Other Contractors 9, Remaining capital works 50

  • 7 Good quality services & infrastructure Development capability is in place and will accelerate with

    new infrastructure taking shape Ore handling system now commissioned Operations well planned

    Detailed design & scheduling Deployment schedules are targeting critical areas with good

    compliance to target

    SLC undercut production commenced in March 2006

    Sound Fundamentals are in Place

  • Undercut Level

  • Undercut Level Development Planned to Sept 2006

  • 2nd Mining Level

  • 2nd Mining Level Development Planned to Sept 2006

  • 12

    Production OutlookWith the ore handling system fully functional, post completion of the sheave shaft replacement, planning is focussed on achieving a 4 Million tonnes per annum rate by March 2007.

    Critical drivers are: 1. Development Advance

    2. Caving initiation

    3. SLC recovery

  • 13

    Production Outlook2. Caving Initiation. Empirical models indicated initiation of caving

    by Feb 07. The undercut area is 30% larger than the estimated threshold Localised geotechnical data from the undercut implies potential for

    reduced hydraulic radius A range of monitoring systems are in place or planned Current micro-seismic system, effective for cave column height of 350m Planned Extension of the monitoring system

  • 14

    Production Outlook3. SLC Recovery. Estimation processes similar to Ridgeway Initially estimated recovery curves used, that require validation by

    planned marker trials Build on knowledge gained at Ridgeway

    Marker trial program established July 2002 at Ridgeway; 70 plus sets of results; provides insight into primary, secondary, tertiary recovery

    Telfers Marker Trial Program: Facilitate an assessment of recovery (timing and location); Better understanding of ore flow to drawpoints, resource recovery, and hence

    ability to predict/calibrate recovery life of mine Ability to design and implement strategies to improve recovery

    Tools for drill and blast optimisation, and draw control management

  • 15

    QUESTIONS & ANSWERS

  • 3 August 2006 All rights reserved Newcrest Mining Ltd

    TELFER - TECHNICAL SERVICES

    Review and Update on the Mineral Resource

    August 2006

  • 3 August 2006 All rights reserved Newcrest Mining Ltd

    Telfer Geology

  • 3 August 2006 All rights reserved Newcrest Mining Ltd

    Telfer

    Nifty

    Montana

    East Trotmans

    Munro

    Iron Hill

    Minyari

    Weenoo Granites

  • 3 August 2006 All rights reserved Newcrest Mining Ltd

    Paterson Province Regional Setting

  • 3 August 2006 All rights reserved Newcrest Mining Ltd

    Telfer Main Dome Aerial View ~1974

  • 3 August 2006 All rights reserved Newcrest Mining Ltd

    Stratigraphy of the Yeneena Supergroup

    WilkieQuartzite

    Kaliranu Beds(InformalName) 9000m

    8000m

    7000m

    6000m

    5000m

    4000m

    2000m

    3000m

    1000m

    0m

    PuntapuntaFormation

    MaluQuartzite

    IsdellFormation

    BroadhurstFormation

    Coolbro Sandstone

    UPP

    ER Y

    ENEE

    NA

    SUB

    -GR

    OU

    PLO

    WER

    YEN

    EEN

    ASU

    B-G

    RO

    UP

    RUDALLMETAMORPHIC COMPLEX

    Telfer Fm

    DOLOMITELIMESTONE

    MUDSTONE

    SANDSTONE

    CONGLOMERATE

    TELFERGOLDDEPOSITS

    NIFTY (Cu)

    KINTYRE (U)

  • 3 August 2006 All rights reserved Newcrest Mining Ltd

    TELFER PROJECTRESOURCE POTENTIAL

    Looking NNE

    TELFER PROJECTRESOURCE POTENTIAL

    Looking NNE

  • 3 August 2006 All rights reserved Newcrest Mining Ltd

    Telfer Dome Mineralisation

    Main Dome E-Reefs & MVR

    I30 Monocline (SLC)

    West Dome E-ReefsMVR

    LLU

    Telfer Dome Fold Axis

  • 3 August 2006 All rights reserved Newcrest Mining Ltd

    Monocline Pit Shell in Relation to Drilling

    Main Dome M-Reef Resource Potential

    Monocline Pit Shell Dictated by Drilling

  • 3 August 2006 All rights reserved Newcrest Mining Ltd

    Telfer Resource Interpretation

    Review of dominant mineralisation styles incorporating new (June 2006) gold interpretation

  • 3 August 2006 All rights reserved Newcrest Mining Ltd Reef

    Stockwork OreBoundary OreWasteReef

    Stockwork OreBoundary OreWaste

  • 3 August 2006 All rights reserved Newcrest Mining Ltd

  • 3 August 2006 All rights reserved Newcrest Mining Ltd

    Telfer Supergene Mineralisation

    Oxide and Transition zones more complicated mineralogically thanexpected

    Complex suite of sulphide minerals including arsenic species Mining practices in place to manage arsenic grade presented to mill Upper, more complicated remnant areas of the open pit mined to date

  • 3 August 2006 All rights reserved Newcrest Mining Ltd

    New Geological Interpretation Key findings

    Increased geological data has improved confidence in interpretation

    Mining to date has been through mineralisation styles dominantly parallel to stratigraphy with localised domains of sub-horizontal enrichment

    June 06 interpretation identifies broader sub-horizontal high gold grade mineralisation styles evident in areas

    since beginning of May 06 potential for northerly extension to known mineralisation beyond Monocline Pit

    shell

    Existing Monocline Pit shell is constrained by extents of existing resource definition drilling

  • 3 August 2006 All rights reserved Newcrest Mining Ltd

    Telfer Open Pit Feasibility & June 2006 Au Interpretation

    TELFER OPEN PITCross-section looking North

    Dominant stratigraphic control parallel to E-reefs

    Consistent broad domains of stockwork mineralisation as well as reef development

    EOM April 06 wireframe

    0.8 g/t Gold Contours

  • 3 August 2006 All rights reserved Newcrest Mining Ltd

    Telfer Main Dome Pit June 2006

    5344mRL 5344mRL

    Dominant stratigraphic control parallel to E-reefs

    Consistent broad domains of stockwork mineralisation as well as reef development

    TELFER OPEN PITCross-section looking North

    0.8 g/t Gold Contours

  • 3 August 2006 All rights reserved Newcrest Mining Ltd

    Arsenic and Cobalt Mineral Associations

    AsSCoS Ratios

  • 3 August 2006 All rights reserved Newcrest Mining Ltd

    Testwork Results

    Arsenic and cobalt are primarily hosted by Cobaltite, Gersdorffite, and inclusions within Pyrite

    Arsenic and Cobaltite in concentrate deports to the 53 to 25 micron size fraction confirmed by Met studies and is the basis of the 2-Con project

    Arsenic and cobalt-bearing mineral associations in:Main Dome Pit (upper ore zones - transition) are primarily hosted by CobaltiteMain Dome Pit (lower ore zones - primary) are primarily hosted by PyriteTelfer Deeps underground are primarily hosted by PyriteWest Dome Pit are primarily hosted by Pyrite

    Plant testwork results show arsenic hosted by pyrite (primary mineralisation) can be suppressed in Sequential Float treatment mode

  • 3 August 2006 All rights reserved Newcrest Mining Ltd

    Grade Control Processes

  • 3 August 2006 All rights reserved Newcrest Mining Ltd

    Grade Control Processes

    Grade Control process improvements in 2006

    24/7 supervision of ore extraction since March 2006

    RC Grade Control 100% of all samples since early 2006

    Validation of interpretation ongoing with RC data testing boundaries and grades of marginal (Boundary Ore) domains

    QAQC of data and coverage of ore mining 24 hours

    Selective removal of HW waste from reefs (M10/12) under direct control of geologist

    Ore Loss, dilution and bench height studies completed

  • 3 August 2006 All rights reserved Newcrest Mining Ltd

    Resource / Reserve Statement

  • 3 August 2006 All rights reserved Newcrest Mining Ltd

    MAIN DOME

    TELFER OPEN PITTELFER OPEN PIT

    TELFER DEEPSTELFER DEEPSTELFER DEEPS

    Over 1 million samples from ~20,000 drillholes were utilised to produce the Open Pit resource estimate

    Over 33,000 samples from 200 drillholes were utilised to produce the Telfer Deeps resource estimate

    WEST DOME

    MAIN DOME

    TELFER OPEN PITTELFER OPEN PIT

    TELFER DEEPSTELFER DEEPSTELFER DEEPS

    Over 1 million samples from ~20,000 drillholes were utilised to produce the Open Pit resource estimate

    Over 33,000 samples from 200 drillholes were utilised to produce the Telfer Deeps resource estimate

    WEST DOME

    59819.90.131.4444Resource (2005)

    Cu (Kt)

    Au (Moz)

    Cu (%)Au (g/t)

    Tonnes (Mt)

    59819.90.131.4444Resource (2005)

    Cu (Kt)

    Au (Moz)

    Cu (%)Au (g/t)

    Tonnes (Mt)

    3085.30.522.859Resource (2005)

    Cu (Kt)

    Au (Moz)

    Cu (%)Au (g/t)

    Tonnes (Mt)

    3085.30.522.859Resource (2005)

    Cu (Kt)

    Au (Moz)

    Cu (%)Au (g/t)

    Tonnes (Mt)

  • 3 August 2006 All rights reserved Newcrest Mining Ltd

    MAIN DOME

    TELFER OPEN PIT Proved and Probable ReserveTELFER OPEN PIT Proved and Probable Reserve

    TELFER DEEPS

    WEST DOME

    TELFER DEEPS Probable ReserveTELFER DEEPS Probable Reserve

    MAIN DOME

    TELFER OPEN PIT Proved and Probable ReserveTELFER OPEN PIT Proved and Probable Reserve

    TELFER DEEPS

    WEST DOME

    TELFER DEEPS Probable ReserveTELFER DEEPS Probable Reserve

    46113.90.141.4320Open Pit Total

    Cu (Kt)

    Au (Moz)

    Cu (%)Au (g/t)Tonnes (Mt)

    46113.90.141.4320Open Pit Total

    Cu (Kt)

    Au (Moz)

    Cu (%)Au (g/t)Tonnes (Mt)

    2003.40.52.739Telfer Deeps

    Cu (Kt)

    Au (Moz)Cu (%)Au (g/t)

    Tonnes (Mt)

    2003.40.52.739Telfer Deeps

    Cu (Kt)

    Au (Moz)Cu (%)Au (g/t)

    Tonnes (Mt)

    (2005)

    (2005)

  • 3 August 2006 All rights reserved Newcrest Mining Ltd

    QUESTIONS & ANSWERS

  • Telfer Gold Mine Fact Sheet Location: Great Sandy Desert, 480km ESE, Port Hedland

    1900km North of Perth by road Geological Setting: Gold and copper mineralisation hosted within reef and

    stockwork domains in Proterozoic sediments, weakly metamorphosed, structurally deformed by folding and faulting, and intruded by granites.

    (As at 30 June 2005) Resource:

    Open Pit Measured 150 Mt @ 1.3 g/t Au, 0.15% Cu Indicated 200 Mt @ 1.6g/t Au, 0.13% Cu Inferred 94 Mt @ 1.1 g/t Au, 0.12% Cu Underground Indicated 48 Mt @ 2.9 g/t Au, 0.54% Cu Inferred 11 Mt @ 2.4 g/t Au, 0.44% Cu

    Proved Reserve: Open Pit - Main Dome 110 Mt @ 1.4 g/t Au, 0.18% Cu West Dome 37 Mt @ 1.0 g/t Au, 0.08% Cu

    Probable Reserve: Open Pit - Main Dome 120 Mt @ 1.5 g/t Au, 0.15% Cu West Dome 49 Mt @ 1.1 g/t Au, 0.08% Cu Underground 39 Mt @ 2.7 g/t Au, 0.50% Cu

    Total Production Gold Copper Average Production Gold Copper

    18.4 Moz 640 kt 770,000 ounces pa 27,800 tonne pa

    Mine Life: Open pit 23 years Underground 10 years

    Capex Stage 1 & 2: A$1,472 million Pre Development Capex: A$170 million Total Throughput: 20-22Mtpa on softer ore

    17Mtpa on hard ore including Telfer Deeps 4Mtpa

    Process Facilities: - 1370 x 1880mm gyratory crusher (nominal P80 120mm) - Two parallel process trains - 2 x 15 MW (11m dia.) SAG mills - 2 x 13 MW (7.5m dia.) Ball Mills - Gravity gold concentration circuit - Copper Gold Flotation - Pyrite Flotation/Leach - Power

    3 x 47MW LM 6000 gas turbines on site 450km gas pipeline, 138MW capacity

    Open Pit Mining Method: - Conventional truck and hydraulic excavator operation, with excavators in backhoe configuration for selective mining in reef areas

    - 12m benches for bulk mined mineralised areas - 4m lifts for selective mining - Mining Fleet

    19 x 240 tonne haul trucks 1 x 630 tonne shovel 2 x 430 tonne shovel 1 x 230 tonne shovel 3 x D75S rotary drills

    Pit Depth: - Main Dome 650m Started Production: November 2004 Underground Mining Method: Sub-level caving (SLC)

    - between 900 1100m below surface - sub-level intervals of 25m

    Shaft Dimensions: 700m west of Telfer Deeps SLC 7 m diameter x 1100m deep Possible Shaft Extension: to 1450m Workforce: Operating 1150 Dump Leach Material: 31Mt treated over LOM Ore Hardness (Bond Work Index): 13.7kWh/t (Range 7-16 kWh/t) Optimum Grind Size: 106m to 120 m Gold Recovery: 85% - 95% Copper Recovery: 75 86% Concentrate Production (Av): 130,000 170,000 dmt pa Concentrate Grade: 21 25% Cu