For personal use only - Home - Australian Securities ... NATAL MARTABE CORPORATE SEPON MARTABE REGIONAL EXPLORATION GOLDEN GROVE PROMINENT HILL DEVELOPMENTS For personal use only NORTH

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Diggers and Dealers, Kalgoorlie Owen L Hegarty Managing Director and CEOAUGUST 2007F

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2Oxiana - value, growth, performance orientation

CORPORATE SEPON REGIONAL EXPLORATION GOLDEN GROVE PROMINENT HILL

Shares: 1,529 MillionUnlisted options: 23 MillionTurnover: 15m Shares/dayMarket Cap: A$5.5 Billion

DEVELOPMENTSMARTABE

Nth America

7%

UK/Europe22%

Asia 2% Other

1%

Australia68%

Management3%

Retail47%

Institutions50%

Ownership

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Mkt Cap Price

First gold at Sepon

Acquired Prominent Hill

First copper at Sepon

Acquired Golden Grove

Construction start Prominent Hill

Acquired Agincourt

Listed: ASXCode & Index: OXR, S&P ASX 100ADR Listing USA: OXFLYShare Price 02/08/07: A$3.69

‘Digger of the Year’

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3Quality assets, quality people, Australia - Asia - Pacific focus

VISIONTo build a major mining company

STRATEGYAsia, Australia, PacificBase and Precious metals High margin, long life, upside Organic growthAcquisition

PERFORMANCE MISSIONQuadruple bottom line excellence

VALUESRespect and OpennessAction and Performance

Sepon Gold and Copper Operations, Laos

Prominent Hill Copper-Gold Mine Development Australia

Yunnan & Sichuan JVs, China MinMetals MOU

Operation

Development

Exploration

Shin Ha JV, Cambodia

Golden GroveZinc, Copper, Precious Metals

Operation, Australia

Exploration JVs, QLD & SA

Kalimantan, Indonesia

Lake Way – 57%

Thai Goldfields JV, Thailand

Martabe – Indonesia

CORPORATE SEPON REGIONAL EXPLORATION GOLDEN GROVE PROMINENT HILL DEVELOPMENTSMARTABE

17% of Royalco ResourcesPhilippines

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4Commodities the winners

Average Annual GDP Growth Forecasts 2012-2016Source: Access Economics, Consensus Economics

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8%

German

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Eurozo

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Japa

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New

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Korea

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China

World economic expansion

Source: Macquarie Research, April 2007

1950-1960 1960-1970 1970-1980 1980-1990 1990 - 2000 2000 - 2010 2010 - 2020-1000

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Total

Copper demand growth by decade

Driven by China

Source: © Brook Hunt 2005, UBS estimates

Head grade - existing copper mines

Forecast

1990 1994 1998 2002 2006 2010 2014 2018

0.80

1.00

1.20

1.40

1.60 Trend in decline in head grade for existing global copper mine production

Supply constrained

% Change in industry cash costs: June '03 to June '06

0%10%20%30%40%50%60%70%80%

Copper Gold Aluminium Nickel

Source Global Mining Research

Cost increases


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5Growth to increase via 6 Development Headings

Sepon – copper and gold expansions

Golden Grove underground and open pit expansions

Prominent Hill – underground extensions

Exploration – competitive advantage

Business and corporate developments

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Martabe – gold mine


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6Sepon gold and copper plants overview

Oxygen plant CCD Train

Copper ROM Pad

Leach Area

Electro-winningSolvent Extraction

Khanong copper open pitDiscovery East Gold pit

Crush and Grind

Gold Plant

• Resources: 3.3Moz

• Production: 174,000oz (2006)

• Expansion feasibility study

Copper Plant• Resources: 1.7Mt

• Production: 60,800t cathodes (2006)

• Expansion feasibility study


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7Sepon: a new mineral field

CURRENT MINING AREANakachan

11.8m @ 9.8g/t Au10.7m @ 6.3g/t Au

Ban Mai9m @ 4.3g/t Au14m @ 4.7g/t Au

Phu Xo3m @ 2.9g/t Au1.3m @ 9.12g/t Au

Houay Yeng43.8m @ 8.7g/t Au23m @ 15.9g/t AuResources pending

Dankoy32.3m @ 2.5g/t Au17m @ 5.2g/t AuResources pending

2.5km

N

Houay Bang13m @ 3.0g/t4m @ 6.44g/t

Pha Vat North Resource 165,000 oz AuLatest Results:34m @ 2.8g/t Au31m @ 2.98g/t Au

Thengkham North167,000oz

Pha Bing15m @ 5.51% Cu7m @ 7.98% CuResources pending

Thengkham South West9m @ 20.5g/t Au18m @ 2.6g/t Au

Sepon Copper Expansion• Incremental addition to production• From Thengkham first• Plant expansion underway• ~ 100,000 t/a• Commencing 2009

Sepon Primary Gold Expansion• Resources 2.2 million ounces and growing• Flotation / pressure oxidation• Feasibility Study due end 07• Commencing 2009

Phavat18m @ 2.8g/t Au28m @ 1.7% Cu

Thengkham SouthResource 327,000t Cu


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8Golden Grove – high grade VHMS, significant upside Mine: Underground

Processing: 1.3Mt/a

Product: Zinc concentrateCopper concentrateHigh Precious Metals concentrate

Forecast Production 2007:(contained)140,000 to 150,000t zinc12,000 to 15,000t copper50,000 to 55,000oz gold3,000,000 to 3,500,000oz silver10,000 to 13,000t lead


Concentrates exported to

Asian smelters

GOLDEN GROVEMINE

Zinc Copper

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1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007

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Mill Throughput

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9Golden Grove – major extensions unfolding

Gossan Hill South

Untested

Georgette


51.1m @ 1.82% Zn, 6.48% Cu

[email protected]%Zn

8.2m @ 18.7% Zn 45.7m @ 2.4% Cu6.5m @ 26.6% Zn

6.0m @ 12.2% Zn3.4m @ 18.7% Zn

9m @ 3.3% Cu 16.6m @ 3.2% Cu11.1m @ 11.7% Zn

29.4m @ 19.5% Zn, 1.6% Cu, 32.5m @ 8.4% Cu

9.6m @ 15.2% Zn, 52.2m @ 3.2% Cu

65.3m @ 7.4% Cu, 5.8m @ 25% Zn

44.5m @ 4.8% Cu, 6.5m @ 5.3% Zn

24m @ 24.9% Zn

Drill holes

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10Significant near surface copper resource

Gold oxide pit900kt @ 3.2g/t Au, 91g/t Ag

Copper open pit3Mt @ 2% copper oxide8Mt @ 2% copper sulphideProduction from 2009

Gold oxide pit

Copper oxide pitCopper sulphide pit


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11Golden Grove Current Scenario

Gossan Hill Budget

Scuddles Budget

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12Golden Grove – New underground ore sources add to production

Gossan Hill Budget

Gossan Hill Exploration

Scuddles Budget

Scuddles Extensions

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13Open pit production extends life

Gossan Hill Budget

Gossan Hill Extension

Scuddles Budget

Scuddles Extensions

Cu Oxide Pit

Primary Pit Cu

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14Mill improvements bring production forward

Gossan Hill BudgetGossan Hill Extension

Scuddles

Scuddles Extensions

Cu Oxide Pit

Primary Cu Pit

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15Significant upside – regional potential

35km of Golden Grove volcanic stratigraphy

126 sq kms of tenements

Most prospective Archaean VHMS province in Australia

Limited regional exploration

Regional exploration JV with Legend Mining


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16Prominent Hill - world’s next significant copper-gold mine now under construction

Competitive Fundamentals• 100% ownership• Attractive jurisdiction• Nearby infrastructure• Suitable scale


Status: Construction

Mine: Open pit

Plant: 8Mt/a crush, grind, flotation plant

Forecast production:90,000t/a Cu LOM average 115,000oz/a Au

First shipment: September 2008

• High grade• Excellent metallurgy • Significant upsideF

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17Prominent Hill – a major new mine


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18Prominent Hill – a major long life copper-gold mine

POTENTIAL

Underground

Sub-level open stoping

Potential 1-2Mt/a

CURRENT

10year planned pit

8Mt/a

UntestedPOTENTIAL

High tonnage

Bulk cave mining operation


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19Prominent Hill Strategic Plan - Project Schedule

Open Pit Construction

Open Pit Production

Upper Level Concurrent Underground

Feasibility Studies

Construction

Production

Lower Level Caving Operation

Prefeasibility Study

Feasibility Studies and Construction

Production

2007 2018 2019 20202014 2015 20162008 2009 2010 20172011 2012 2013


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20Excellent potential for more ‘Prominent Hills’

4,175km2 of highly prospective tenements.

Remains under explored.

Detailed gravity surveys undertaken

Multiple Prominent Hill style targets

20 targets for drill testing.

Gravity (1st vertical derivative)

Neptune

Joes Dam

Manxman

Manxman B

Peculiar Knob North

Blaze

Danae Danae HillHillTorchTorch

Quaoar

Pluto

Venus

Mt WoodsMt Woods

Armstrong

Scorch

Taurus

Yellow Dog

EL 3079EL 3079

EL 3056EL 3056

EL EL 29012901

EL 3162EL 3162

EL 3229EL 3229

Wildfire

0 20

kilometres

Mount Woods Inlier1VD Gravity

Prospect to be drilled

20km

N PROMINENT HILLPROMINENT HILL


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21Indonesia - Martabe: on track to be a major gold producer

Resource base 6Moz gold, 60Moz silver

Feasibility study

CIL processing

First production 2009

Potential for +250,000oz/a

INDONESIA

Lake Toba

Contract of Work

MEDAN

TEBING TINGGI

KABANJAHE

PEMATANGSIANTAR

PARAPAT

TARUTUNG

SIBOLGA

PADANGSIDEMPUAN

KOTANOPANNATAL

MARTABE


NORTH SUMATRA

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1000 Kilometres

Regional advantage in under - explored Asia


Woolgar

Warroo

Kalimantan Gold Corporation JV

Philippines

YJLM JV

Sichuan JangtzeJiang Minerals

Golden GroveSouth Australia

Martabe

Thai Goldfields JV

Cambodia Sepon

Rexing JV

Wiluna

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23Development project pipeline


2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Prominent Hill Open Pit

Golden Grove Copper Oxide Pit

Sepon Copper

Expansion Martabe Gold Open Pit

Prominent Hill UG

Xantho Extended & Cervantes UG at

Golden Grove

Golden Grove Copper

Sulphide Pit

Prominent Hill Bulk

Mining

Sepon Primary

Gold

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24Oxiana - growth and performance oriented

Oxiana has:• High quality operations• Full development pipeline• Regional competitive advantage• Major exploration commitment• Financial strength• Skilled and committed workforce

Continued growth through:• Improving operations• Expanding operations• Discovering new resources• Developing new resources• Business development

MAJORMININGCOMPANY.


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www.oxiana.com.auTHANK YOU

Disclaimer: This Corporate Update is not a disclosure document nor does it constitute the provision of financial product advice. None of Oxiana Limited (“Oxiana”), its related bodies corporate, officers, employees and advisors makes or gives any representation, warranty or guarantee in relation to this Corporate Update (whether orally, in document form or in any form whatsoever) (“Information”) to the recipient of this Corporate Update (“Recipient”) or any of its related bodies corporate, officers, employees and advisors. The Information is provided expressly on the basis that the Recipient will carry out its own independent inquiries into the Information and make its own independent decisions about the affairs, financial position or prospects of Oxiana. Oxiana reserves the right to update, amend or supplement the Information at any time in its absolute discretion (without incurring any obligation to do so).

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For personal use only - Home - Australian Securities ... NATAL MARTABE CORPORATE SEPON MARTABE REGIONAL EXPLORATION GOLDEN GROVE PROMINENT HILL DEVELOPMENTS For personal use only NORTH