Oceanagold Corporation · TSX:OGC

Oceanagold — Denver Gold Forum 2011

19 slides from Oceanagold's conference presentation, Sep 20, 2011

1. Slide 1: Transforming OceanaGold

   Transforming OceanaGold MD &CEO, Mick Wilkes Denver Gold Forum September 20, 2011

2. Slide 2: Cautionary Notes

   Cautionary Notes Cautionary Notes - Information Purposes Only The information contained in this presentation is provided by OceanaGold Corporation (“OGC”) for informational purposes only and does not constitute an offer to issue or arrange to issue, or the solicitation of an offer to issue, securiti

3. Slide 3: Agenda

   Agenda Vision 2016  Organic growth opportunities OceanaGold today  Current producing assets Transformation of OceanaGold  Development and Construction activities  Exploration 3

4. Slide 4: OceanaGold Vision 2016

   OceanaGold Vision 2016  High performing, growth orientated, Asia Pacific gold company  Explore, develop and operate quality assets in a safe & sustainable manner Our Vision 2016 Enablers  Superior returns to shareholders  Innovative team culture  Annual production of 600Koz gold  Acting on opp

5. Slide 5: OceanaGold Investment Proposition

   OceanaGold Investment Proposition EXPERIENCED GOLD PRODUCER ORGANIC GROWTH STRATEGY ASIA PACIFIC FOCUS  Solid production growth with declining cash cost profile  Largest gold producer in New Zealand  Construction commenced of high grade gold - copper porphyry in Philippines to commission in Q4 20

6. Slide 6: Organic Growth Potential

   Organic Growth Potential Project Development Drilling Scoping Feasibility Development Production Macraes Measured Didipio expansion Didipio Frasers Indicated Macraes Superpit Reefton Inferred Blackwater Greenfield Underground Big River Open Pit 6 Note: Conceptual growth potential

7. Slide 7: Production Growth Potential

   Production Growth Potential Our Vision: 600Koz gold production by 2016 700 600 500 Gold Production Koz 400 300 200 100 0 2011E 2012E 2013E 2014E 2015E 2016E Didipio Stage II Blackwater Big River Macraes Superpit Didipio Reef ton Macraes Goldf ields 7 Note: Conceptual growth potential

8. Slide 8: Current Producing Assets

   Current Producing Assets Successful long term presence in New Zealand Macraes Frasers Reefton Macraes Frasers Reefton Mine Type Open Pit Underground Open Pit Resources1 Gold (Moz) 4.31 0.90 1.20 Reserves1 Gold (Moz) 1.53 0.15 0.47 Estimated Mine Life ~2019 ~2014 ~2015 - 2017 Gold Production (ounces)

9. Slide 9: Didipio Gold-Copper Project

   Didipio Gold-Copper Project Construction commenced June 2011  Mine life: 16 years  Annual production 100Koz Au + 14Kt Cu (LOM Av.)  Gold reserves 1.68Moz  Copper reserves 229Kt  Ore reserves 50.7Mt @ 1.03g/t Au and 0.45% Cu  Years 1-6: Negative cash cost of US$(79)/oz Au  LOM: Cash cost US$35

10. Slide 10: Didipio: Construction Progress

    Didipio: Construction Progress July: Road upgrade progressing well July: Accommodation sites nearing completion July: Process site preparation August: Ball mill shells being transferred from August: Roadside gabion work Singapore to Manila August: Construction office fit out 10

11. Slide 11: Didipio Stage II Concept

    Didipio Stage II Concept 6 300  Increase plant from 5 250 3.5Mtpa to 5Mpta Throughput Mtpa 4 200  Nominal production Gold Koz 3 150 rate 2 100 1 50  150Koz Gold 0 0  20Kt Copper 2013E 2014E 2015E 2016E Throughput Gold Production Total Gold Equivalent Production  Add ball mills, flotation, power

12. Slide 12: Significant Near Mine Exploration Potential

    Significant Near Mine Exploration Potential Drilling program to commence end 2011  Additional porphyry systems in the exploration lease  Multiple drilling targets  Exploration team established in country  Forecast $5-10M p.a. 12

13. Slide 13: Macraes Superpit Concept

    Macraes Superpit Concept  Larger open pit  New process plant  Higher mining rate and plant throughput  Lower unit operating costs  Possible Reserve increase to +2.6Moz  Additional production circa 100koz p.a. + tungsten bi-product  Significant potential for defining additional open pitable or

14. Slide 14: Reefton – Enormous Potential in an Historic District

    Reefton – Enormous Potential in an Historic District  30km strike length of goldfield  10 million oz mined historically  Reserves up 28% in 2010  High priority targets identified from new geological models 14

15. Slide 15: Blackwater Project

    Blackwater Project  5km decline from surface  Narrow vein mining  Process at Reefton plant  Drilling commencing Q4 2011  Definitive feasibility study 2013  Construction from 2014 – 2 years  Potential production 50koz p.a. @sub $600/oz 15

16. Slide 16: Big River Discovery

    Big River Discovery  Significant high grade mineralisation intersected  Strong potential for BR008, 1.2 m @ 12.1 g/t vertical extent BR003, 1.1 m @ 1.6 g/t BR004, 15.1 m @ 8.18 g/t  Close to existing plant BR006, 0.5 m @ 1.49 and infrastructure at g/t BR005, 4 m @ 3.18 g/t Reefton BR009 BR007, 0.

17. Slide 17: Experienced Management Team

    Experienced Management Team Mick Wilkes MD & Chief Executive Officer Martyn Creaney Project Director Philippines • 27 years industry experience • >30 years construction and project management • Developed major projects in Australia and SE Asia mainly in mining industry • Strong Operations background

18. Slide 18: OceanaGold – Innovation, Performance & Growth

    Qy OCEANAGOLD INNOVATION, PERFORMANCE & GROWTH

19. Slide 19: Mineral Resources and Reserves

    Mineral Resources and Reserves RESOURCE MEASURED INDICATED MEASURED & INDICATED INFERRED RESOURCE AREA Mt Au g/t Au Moz Cu % Cu Mt Mt Au g/t Au Moz Cu % Cu Mt Mt Au g/t Au Moz Cu % Cu Mt Mt Au g/t Au Moz Cu % Cu Mt MACRAES TOTAL 27.16 1.36 1.18 . . 78.42 1.08 2.72 . 105.58 1.15 3.90 . . 37.6 1.1 1.3

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