140901 ogc corporate presentation september north america final

September 2014

Corporate Presentation

OceanaGold Corporation Innovation Performance Growth 2

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, securities of OGC or other financial products. The information contained

herein is not investment or financial product advice and has been prepared without taking into account the investment objectives, financial situation or

particular needs of any particular person. The views, opinions and advice provided in this presentation reflect those of the individual presenters only.

No representation or warranty, express or implied, is made as to the fairness, accuracy, completeness or correctness of the information, opinions and

conclusion contained in this presentation. To the maximum extent permitted by law, none of OGC or any of its directors, officers, employees or agents

accepts any liability, including, without limitation, any liability arising out of fault or negligence, for any loss arising from the use of the information

contained in this presentation. Furthermore, this presentation does not constitute an offer of shares for sale in the United States or to any person that

is, or is acting for the account or benefit of, any U.S. person (as defined in Regulation S under the United States Securities Act of 1933, as amended

(the "Securities Act")) ("U.S. Person"), or in any other jurisdiction in which such an offer would be illegal. OGCs shares have not been and will not be registered under the Securities Act.

Technical Disclosure

The Mineral Resources for Didipio and Blackwater (within the Reefton Goldfield) were prepared by, or under the supervision of, J. G. Moore, whilst the

Mineral Resources for Macraes and Reefton were prepared by S. Doyle. The Mineral Reserves for Didipio were prepared under the supervision of

R.Corbett, while the Mineral Reserves for Macraes and Reefton were prepared by, or under the supervision of, K Madambi. C. Bautista is Exploration

Manager for the Philippines. S. Doyle, K. Madambi, and J. G. Moore are Members and Chartered professionals with the Australasian Institute of

Mining and Metallurgy and each is a qualified person for the purposes of NI 43-101. R. Corbett is a Registered Professional Engineer (Ontario) and is a qualified person for the purposes of NI 43-101. C. Bautista is a member of the AIG and is a qualified person for the purposes of NI 43-101. Messrs Moore, Doyle, Corbett, Madambi and Bautista have sufficient experience, which is relevant to the style of mineralisation and type of deposits under

consideration, and to the activities which they are undertaking, to qualify as Competent Persons as defined in the 2012 Edition of the Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves (JORC Code).

The resource estimates for the El Dorado Project were prepared by Mr. Steven Ristorcelli, C.P.G., of Mine Development Associates, Reno, Nevada

(who is an independent Qualified Person as defined in NI 43-101) and conforms to current CIM Standards on Mineral Resources and Reserves.

For further scientific and technical information (including disclosure regarding mineral resources and mineral reserves) relating to the Reefton Project,

the Macraes Project and the Didipio Project please refer to the NI 43-101 compliant technical reports available at sedar.com under the Companys name. For further scientific and technical information (including disclosure regarding mineral resources and mineral reserves) relating to the El

Salvador Project please refer to the reports publicly available on SEDAR (www.sedar.com) prepared for Pacific Rim.


OceanaGold Today

Emerging multinational gold and copper producer with strong free cash flow

Macraes New Zealand Didipio Philippines Reefton New Zealand

90-Day Average Daily Liquidity2

2.6m shares

Stock Exchanges

TSX, ASX, NZX Ticker: OGC

Market Capitalisation2

C$790

Shareholder Geo. Breakdown1

North America

61%

Australia & NZ

19%

Europe 18%

Asia 2%

1. Internal Report as at 31 Jul 2014

2. Metrics as at 11 Sep 2014

Shares Outstanding2

301m


OceanaGold Value Proposition

MANAGEMENT

STRATEGY

OPERATIONS GROWTH

SOCIAL LICENSE

Commitment Experience

Execution Discipline

Free Cash Flow


Mining engineer with over 28 years of experience working in Australia and Argentina

Broad operational experience in underground and open pit gold, copper, lead, zinc and nickel mines

Recent experience with Xstrata Copper

Practising lawyer, joined OGCs legal and company secretarial team in 2009

Broad range legal experience including corporate, equity and debt financing and general commercial law

24 years Human Resources experience

Industry experience includes Eldorado Gold and Sino Gold Mining Ltd

Significant Asian experience with multinational corporations

>30 years financial experience

Capital markets

Financial and risk management expertise

17 years industry experience including senior finance roles at Newcrest Mining and Western Mining Corp.

Over 30 years industry experience

Developed major projects in Australia & SE Asia

Strong Operations background in hard rock mining

Strong in Community and Government relations

Extensive SE Asian experience

Metallurgist with >30 years industry experience

Mineral processing

Precious metals and Sulphide minerals

Joined predecessor company in 1991 and has held various technical and operations responsibilities

International capital markets experience in metals and mining

Appointed VP Investor Relations in 2007 and current role in 2011

Responsible for identifying & evaluating external growth opportunities; & capital markets interface

Experienced Management Team

Liang Tang Company Secretary & Corporate Counsel

Yuwen Ma Head of Human Resources

Mick Wilkes Managing Director & Chief Executive Officer

Mark Cadzow Chief Development Officer

Darren Klinck Head of Business Development

Michael Holmes Chief Operating Officer

Mark Chamberlain Chief Financial Officer


OceanaGold Vision & Strategy

We will be a mid-tier, multinational gold producer delivering superior shareholder returns in a

safe and sustainable manner by developing and operating high quality assets. We will be the

partner, employer and mining company of choice.

Maximising

value from

existing

assets

Operating

efficiently

Spending

judiciously capital discipline

Investing in

high quality

assets

CORE

VALUES

Optimise mines

Strategic

capital allocation

Commitment to

Sustainability

Strengthen

balance sheet


Strategy on Growth

Invest in high quality organic and external value add opportunities

Effective use of capital through investment in

first and second quartile assets

Leveraging in-house expertise to identify and

evaluate new opportunities

Focus on accretive transactions that increase

shareholder wealth

Leveraging experience and capabilities

Clear definition of investment criteria

Accretive investment to increase

shareholder wealth

Focus on Asia-Pacific and Americas regions


2014

Guidance YTD Jun 2014 Q2 2014

Combined Didipio New

Zealand Company Didipio

New

Zealand Company

Gold

production oz

275,000 to

305,000 45,266 102,133 147,399 14,786 46,045 60,831

Copper

production t

21,000 to

24,000 11,185 11,185 4,706 4,706

Gold sales oz 54,010 112,334 166,344 17,746 54,548 72,294

Copper sales t 12,925 12,925 5,173 5,173

Cash costs $/oz 400 to 4501 (412)1 843 4351 (254)1 1,114 7781

All-In

Sustaining

Costs2 $/oz 750 to 8501 (150)1 1,226 7791

First Half 2014 Results Summary

1.Net of by-product credits

2.All-in Sustaining Costs (AISC) based on WGC methodology; expansionary and growth capital expenditures are excluded from the AISC


2014 Guidance

Didipio Consolidated

1.Costs at Didipio are NEGATIVE net of copper by-product credits and assumes copper price of $3.20/lb

2.Assumes NZD/USD exchange rate of 0.80

3.All-in Sustaining Costs based on WGC methodology. expansionary and growth capital expenditures are excluded from the AISC

Cash Cost Guidance (per ounce)

All-In Sustaining Costs3

(per ounce)

($725) ($650)1

New Zealand

Combined

$400 $4501,2

$750 $8501,2

85,000 95,000 Gold Production

Guidance (ounces)

Copper Production

Guidance (tonnes)

21,000 24,000

190,000 210,000

275,000 305,000

21,000 24,000

$840 $9252

($240) ($210)1 $1,170 $1,2902

On track to meet full year guidance


Financial Position (as at 30 Jun 2014)

Strengthening balance sheet from strong free cash flow generation

LIQUIDITY

Cash $46m

Undrawn Revolving Credit Facility $82m

TOTAL LIQUIDITY $128m

CORE DEBT

Revolving Credit Facility $118m

Equipment leases $38m

TOTAL DEBT $156m

Repaid approximately $95m in core debt

over past 18 months

Repaid over $30m in debt in 2014

Revolving credit facility of $200m with

competitive fiscal terms, expires in mid-

2017

Banking syndicate: Barclays, BNP

Paribas, Citibank, HSBC, Nedbank

Continue to repay debt and increase cash

position


Macro &

Comparatives


Share Price Performance Comparative

Effective execution of strategy: strong results & enhanced shareholder value

Source: Bloomberg

-80%

-60%

-40%

-20%

0%

20%

40%

60%

80%

100%

120%

Sem

afo

In

c.

No

rth

ern

Sta

r R

eso

urc

es

Ocea

naG

old

Corp

.

Ce

nta

min

plc

Rio

Alto M

inin

g

Prim

ero

Min

ing C

orp

.

De

tou

r G

old

Co

rpora

tio

n

OZ

Min

era

ls

AuR

ico G

old

Ne

w G

old

Inc.

Barr

ick G

old

B2G

old

Corp

.

Gold

co

rp

Gold

en

Sta

r

Ne

wcre

st

Min

ing

Du

nd

ee P

recio

us M

eta

ls

Ala

cer

Go

ld C

orp

.

Evolu

tio

n M

inin

g

Yam

an

a G

old

IAM

GO

LD

Arg

on

aut

Gold

Inc.

Ala

mos G

old

Pers

eu

s M

inin

g

Bea

dell

Reso

urc

es

Kin

gsg

ate

Con

so

lidate

d

Me

dusa

Min

ing

Re

gis

Reso

urc

es

Share Price Performance (Last 12 months as at 5 September 2014)

Gold Spot Price (US$/oz) Market Vectors Junior Gold Miners ETF


Price to Cash Flow per Share Comparative

P/CFPS multiple demonstrates opportunity for share price growth

Source: CIBC Research (9 Sep 2014)

0

2

4

6

8

10

12

14

16

18

Ocea

naG

old

Ce

nte

rra

Gold

Kin

ross

IAM

GO

LD

Ala

cer

Go

ld

Du

nd

ee P

recio

us

Centa

min

Barr

ick G

old

Yam

an

a G

old

Arg

on

aut

Gold

B2G

old

De

tou

r G

old

New

Gold

AuR

ico

SE

MA

FO

Prim

ero

Min

ing

Agn

ico

Ea

gle

Gold

co

rp

Eld

ora

do G

old

Gold

en

Sta

r

Ala

mos G

old

Price to Cash Flow per Share Multiples 2014E 2015E


Free Cash Flow Yield Comparative

Well positioned to strengthen balance sheet and invest in further value creation

Source: Macquarie Research (7 Sep 2014)

-15%

-10%

-5%

0%

5%

10%

15%

20%

25%

30%

35%

40%

Bea

dell

Ocea

naG

old

Ne

wcre

st

SE

MA

FO

Barr

ick G

old

Agn

ico

-Eag

le

Yam

an

a

Ala

cer

Ala

mos

Arg

on

aut

Re

gis

Reso

urc

es

De

tou

r G

old

Prim

ero

Eld

ora

do

Gold

co

rp

IAM

GO

LD

No

rth

ern

Sta

r

Pers

eu

s

AuR

ico

Me

dusa

Free Cash Flow Yield Estimates

2014 2015


-800

-600

-400

-200

0

200

400

600

800

1,000

1,200

1,400

1,600

0 10 20 30 40 50 60 70 80 90 100

All

-in

Su

sta

inin

g c

ost

($/o

z A

u)

Cumulative Production (Percentile)

Q1 Q4 Q3 Q2

Didipio

Global AISC Curve Comparative

Source: Goldman Sachs Research (1 Sep 2014)

Gold Price (as at 10 Sep 2014)

All-In Sustaining Cost Curve

OceanaGold Consolidated AISC 2014 Range

1st quartile AISC demonstrates strong profitability even at lower commodity prices


Philippines

Operations


Didipio Mine

High quality, low-cost transformative asset generating significant free cash flow

First FTAA signed & in production

Open pit (currently) plus underground

Current Mine Life: 2029

Nominal production of 100 koz gold, 14 kt

copper per year over life of mine

Lepanto / Goldfields

Manila

DIDIPIO

San Fernando (Port)

Mindanao

Luzon

1. Complete Reserve & Resource Table on page 39

P&P Reserves1 of 1.59 Moz gold, 210 kt

copper


Didipio Overview

Production increasing in H2 as operations

advance Stage 3 into a higher grade zone of

the ore body

Increasing throughput rate to planned 3.5

Mtpa by end of 2014

Power grid connection development work

advancing well lower operating costs early 2016

Didipio Optimisation Study complete with

strong results

Conducting exploration geophysical survey at

depths greater than 500 metres near mine-site

in Q3

2014 Didipio Results H1 2014

Gold produced oz 45,266

Copper produced t 11,185

Gold equivalent ounces

produced oz 104,506

Cash costs

(by-product) per oz ($412)

Cash costs

(co-product) per oz $565

AISC (by-product)

per oz ($150)

AISC (co-product) per oz $678


Didipio Optimisation Study Highlights

Access to high grade material

brought forward by 2 years Q3 17

Optimised design of underground

and open pit resulting in 70 Mt in

reduced waste

Crown pillar moved higher by 80 m,

underground expanded deeper by

170 m two mining domains est.

Underground development to

commence 1 year earlier Q1 15

Increased mining rate to 1.6 Mtpa

(previously 1.2 Mtpa) by 2020 Note: Not to scale.

Original Open Pit Design Optimised Open Pit Design

Larger Underground Mine


Optimised Didipio Design

Development: Q1 2015

Production: Q3 2017

Full ramp-up: 2020

Revised Plan

Mining rate: 1.6 Mtpa

Mining type: long-hole open stope

w/paste backfill

Technical Design

Update NI43-101: Late Oct

Resource drilling: Immediate

Resource Statements: w/NI43-101

Next Steps

Pre-production: $110m / 3 yrs

Annual Sustaining: $7m to $8m

Capex

Study identifies significant value to be unlocked at Didipio

Limit of

Oxidation

Dark

Diorite Dark

Diorite

Previous

Stage 5/6

Pit Design

AuEq g/t

New Stage 5 & 6

Pit Designs

Underground

Mine

Note: Not to scale.


New Zealand

Operations


New Zealand Optimisation

Mine optimisation and operating efficiencies

over $100m in cost savings

Production de-risked with zero cost collar

hedging over next 18 months

Evaluating organic growth opportunities

New Zealand Financial De-risking Program

Macraes Reefton

Remaining ounces

hedged1 154.5 koz 53.7 koz

Hedge period Jan/14 Jan/16 Jun/13 Jun/15

Put Option Price

NZ$1,500/oz NZ$1,600/oz

Call Option Price NZ$1,600/oz NZ$1,787/oz

Strong New Zealand dollar persists, partly

offset by hedging program in NZD

1. As at 30 Jun 2014

Focused on margin by mining less waste

Mitigated downside risk of a lower gold price, optionality with a higher gold price


New Zealand Assets

Macraes Frasers Reefton NZ Combined

Mine Type Open pit Underground Open pit

Nominal production koz 90 120 40 55 50 70 180 245

P&P Reserves1

Moz 1.23 0.12 0.19 1.54

M&I Resources1

Moz 3.15 0.86 0.74 4.98

Inferred Resources1

Moz 1.5 0.6 0.9 3.18

Ore milled Mtpa 5.0 0.8 1.6 7.4

Head grade g/t 0.9 1.1 2.0 2.2 1.4 1.5 1.0 1.4

Estimated mine life end of 2017 end of 2015 end of 2015

Over 8 million ounces in resource provide optionality with a higher gold price

1. Complete Reserve & Resource Table on page 39


New Zealand Studies

Round Hill Gold/Tungsten

M&I Resource1 of 1.26 Moz gold, sterilised by current

location of process plant

Evaluating new, organic growth opportunities in New Zealand

1) Refer to 2013 AIF

Resource definition and metallurgical test work

underway

Conceptual design includes build of new but relocated

3.0 Mtpa process plant w/Au stream and WO3 stream

Blackwater

Inferred Resource1 of 0.7 Moz Au grading 23 g/t

Drill program tested for continuity below historic

workings

Preliminary Economic Assessment near finalisation

Near Reefton

At Macraes


Sustainability


Foundation of Our Success

Open and transparent communications,

particularly during economic downturn

Unique and tailored programs for a diverse

group of stakeholders

Engagement throughout all stages of the

lifecycle

Operating to highest of environmental

standards

Continuous improvement to enhance social

licence

A strong social license underpins success in socially complex, emerging countries


Investing in Our Local Communities

Education Infrastructure

Teachers salaries Scholarship programs

New roads and improvements Bridges, waterways

Enterprise Development Building Capacity

DiCorp: Provides mine services, employs 300 locally

Didipio Training Academy Leadership training

Working together with our communities to leave a positive, long lasting legacy

Employment

Hire locally policy 98% Filipino workforce

Investing in the reconstruction after Typhoon Haiyan

Support


Sustainable Development Today and Beyond

Water Management

Water treatment plant at Didipio

Raise 10,000 trout a year at foot of Macraes tailings facility

Environment Rehabilitation

ISO14001 EMS at Didipio Reducing GhG emissions

Restoring lands to match area Supporting agriculture

Partnering with likeminded organisations such as the IRF

An unwavering commitment to our social responsibilities beyond mining

Agroforestry

Planting one million trees Commercial plantations


Looking Ahead

Well on track to achieve full year production and

cost guidance

Increasing throughput rates to planned 3.5 Mtpa

by year end at Didipio

Identify and evaluate new value add opportunities

Continue to repay debt while increasing cash

position

Continue to deliver positive results through effective execution of strategy

Finalise the Didipio Optimisation Study including

an update to the NI 43-101

Significant

cash flow

generation

Strengthen

the balance

sheet

Increase

shareholder

wealth

Finalise the Blackwater Preliminary Economic

Assessment


Upcoming Events

Denver Gold Forum Denver September 15 to 17, 2014

Goldman Sachs Mining & Metals Conference New York November 19 to 20, 2014

Canaccord Global Resources Conference New York October 15 to 16, 2014

Q3 Financial and Operating Results Release and Webcast October 31, 2014

Didipio & New Zealand Site Visits TBD - Late Nov/early Dec,

2014

Innovation Performance Growth

oceanagold.com


Board of Directors

Jim Askew (Chairman) - Mr. Askew is a mining engineer with over 35 years broad international experience as a Director/CEO

for a wide range of international publicly listed mining, mining finance, and other mining related companies. He has served on

the board of numerous resource public companies, which currently include Evolution Mining and Asian Mineral Resources Ltd.

Mick Wilkes (MD & CEO) Mr. Wilkes is a mining engineer with over 30 years of broad international experience across Asia and Australia. Prior to OGC, Mick was Executive General Manager of Operations at OZ Minerals where he was responsible for

the evaluation studies, construction and operation of the Prominent Hill copper gold project in South Australia. Preceding this, he

was General Manager of the Sepon gold copper project for Oxiana in Laos. Earlier experience was in Papua New Guinea in

senior roles and, at the outset of his career, at Mount Isa Mines in operations and design.

Denham Shale (Lead Director) - Mr. Shale is a lawyer in practice in Auckland, New Zealand. He has been a director of listed

companies for over 20 years and is President and an Accredited Fellow of the Institute of Directors in New Zealand Inc.

Joey Leviste (Director) - Mr. Leviste is the current Chairman of OceanaGold's wholly-owned subsidiary company in the

Philippines, OceanaGold (Philippines), Inc and Philippine resident of the Australia-Philippines Business Council. He has also

been appointed by the President of the Philippines as private sector member of Governing Council of the Philippines Council for

Agriculture, Aquatic and Natural Resource.

Bill Myckatyn (Director) - Mr. Myckatyn is a professional mining engineer with over 30 years experience in mine development

and operations. He was the former Chairman of Quadra FNX Mining Ltd., until its takeover in 2012, a company he co-founded as

CEO in 2002. He is currently on the Board for First Point Minerals, San Marco Resources and Delta Gold.

Dr Geoff Raby (Director) - Dr. Raby is the former Australian Ambassador to The Peoples Republic of China from 2007 2011. Dr. Raby joined the Australian public service in 1986 and has held various postings throughout Asia and Europe prior to his

posting in Beijing. Dr. Raby is also a non-executive director of ASX listed Fortescue and SmartTrans.

Paul Sweeney (Director) Mr Sweeney has over 35 years experience in financial management of mining and renewable energy companies. He held management roles with Placer Dome and Gibraltar Mines, board roles with Pan American Silver and

New Gold. He currently sits on the boards of Tahoe Resources, Grenville Strategic Royalty Corp., Magma Energy Corp, and

Mongolia Growth Group Ltd.


Analyst Coverage

North America Analyst

BMO Capital Markets Brian Quast

CIBC Jeff Killeen

Cormark Securities Mike Kozak

Macquarie Bank Michael Siperco

National Bank Financial Raj Ray

PI Financial Brian Szeto

Australia Analyst

Canaccord Genuity Reg Spencer

CIMB David Coates

Citigroup Trent Allen

Credit Suisse Michael Slifirski

GMP Securities Conrad Mulherin

Goldman Sachs Brett Cottrell

JP Morgan Mark Busuttil

Macquarie Bank Ben Crowley

New Zealand Analyst

Forsyth Barr Andrew Harvey-Green


USDm Q2 2014 Q1 2014 YTD

Jun 2014

YTD

Jun 2013

Revenue 127.5 170.4 297.8 226.9

Operating costs1 (97.9) (69.4) (167.2) (137.3)

EBITDA2 29.6 101.0 130.6 89.6

Depreciation & amortisation (31.4) (33.4) (64.8) (69.4)

Net interest & finance costs (2.8) (2.4) (5.3) (12.7)

Earnings before tax2 (4.6) 65.2 60.5 7.5

Income tax expense 5.7 (5.4) 0.3 (3.7)

Gain/(loss) on fair value undesignated hedges (4.3) (1.3) (5.6) (8.2)

Impairment charge (85.5)

Tax benefit/(expense) on gain/(loss) on undesignated

hedges & impairment 1.2 0.4 1.6 26.4

Net profit/(loss) after impairment (2.1) 58.9 56.8 (63.4)

Gold price received ($ per ounce) 1,314 1,311 1,312 1,377

Consolidated Financial Results

1. Includes G&A 2. Before gain/(loss) on undesignated hedges and impairment Note: Summation subject to rounding differences


USDm Q2 2014 Q1 2014 YTD

Jun 2014

YTD

Jun 2013

Opening cash balance 42.1 24.8 24.8 96.5

Operating cash inflows 52.7 73.3 126.0 31.3

Investing expenditure (31.1) (24.1) (55.2) (90.2)

Free cash flow 21.6 49.2 70.8 (58.9)

Financing cash inflows/(outflows) (12.6) (25.2) (37.8) (30.2)

Foreign exchange effect (4.9) (6.7) (11.6) 10.5

Net cash (decrease)/increase 4.1 17.3 21.4 (78.6)

Closing cash balance 46.2 42.1 46.2 17.9

Consolidated Cash Flows

Note: Summation subject to rounding differences

Investing expenditure includes:

Pre-strip: $17m, Sustaining: $6m, TSF & water treatment plant: $5m, Didipio process plant debottlenecking: $2m, Exploration: $1m


El Salvador

Underground mine = small footprint

High grade, low sulphidation, epithermal deposit

Continuous focus on community and stakeholder

engagement

El Dorado

San Salvador

El Salvador

Guatemala

Belize

Honduras

Nicaragua

Costa Rica

Panama

Measured & Indicated Resources1

Gold: 1.30 Moz Silver: 9.48 Moz

M&I Average Grade

Gold: 9.42 g/t Silver: 69.0 g/t

Inferred Resources1

Gold: 0.30 Moz Silver: 1.9 Moz

El Dorado currently in international arbitration;

OGC seeks a negotiated outcome to impasse2 1. Complete Reserve & Resource Table on page 39

2. Refer to OGC news release dated 8 October 2013 and OGC to Acquire Pacific Rim Mining presentation at www.oceanagold.com for additional details and details on the current arbitration claim

Nominal investment in a high quality resource w/ significant upside potential


Drilling Highlights (MetEx):

31m @ 0.35 g/t Au & 0.85% Cu

28m @ 0.65 g/t Au & 0.27% Cu

13m @ 0.75 g/t Au & 0.25% Cu

7m @ 1.16 g/t Au & 0.57% Cu

Rock Sampling Highlights:

8.09 g/t Au & 4.21% Cu

3.20 g/t Au & 1.73% Cu

2.86 g/t Au & 2.09% Cu

2.54 g/t Au & 1.10% Cu

FTAA Exploration Opportunities

1 KM

1.6

KM

>150 ppb Au > 80 ppb Au > 50 ppb Au

250 ppm Cu contour 200 ppm Cu contour Proposed drillhole

collar (with direction)

Cabinwangan Mogambos

PPYTR05: 8m @

0.18% Cu and 0.02

g/t Au

PPYCH02: 4m @

0.26% Cu and

0.03g/t Au

1.42 g/t Au

and 6.81%

Cu

2m @ 1.91 g/t Au

2m @ 1.48 g/t Au

Papaya

DBeau 5 holes

2, 053.5 m

Luminag 2 holes , 496.4 m

Morning Star 1 hole, 461.3 m

True Blue

Didipio Au-Cu

MSDH212

DBDH202

Chinichinga 2 holes, 396.4 m

CDDH105 &

CDDW105

DBDH206

San Pedro 5 holes, 1, 756.6 m

LMDH002

(ongoing)

SDDH049 SDDH050 SDDH051

SDDH052

SDDH053

Near-mine


Financial or Technical Assistance Agreement

Capital Recovery Period

5 years from date of commercial production (April 1, 2013) to recover pre-operating expenses and other allowable items dating back to 1994 (when FTAA was signed)

Residual capital (capital unrecovered within 5 years) amortised over next 3 years

Revenue Sharing

After capital recovery period, sharing of NET REVENUE

40% OceanaGold 60% Government Share

Net Revenue Calculation

Revenue

LESS operating costs

LESS depreciation of post development capital expenditure (excluding underground development costs)

LESS underground mine development

= NET REVENUE

Government Share

2% Net Smelter Royalty

2% Excise Duty (2% gross sales for gold, 2% copper concentrate)

Corporate Tax (current tax rate is 30%)

Other taxes (e.g. Withholding tax)

8% Free Carried (entitles the holder to 8% of equity in the operating vehicle and dividends paid after recovery period)


Mineral Resources and Reserves (as at 31 Dec 2013)

RESOURCES MEASURED INDICATED MEASURED & INDICATED INFERRED RESOURCE

AREA Mt Au

g/t

Au

Moz

Ag

g/t

Ag

Moz

Cu

%

Cu

Mt Mt

Au

g/t

Au

Moz

Ag

g/t

Ag

Moz

Cu

%

Cu

Mt Mt

Au

g/t

Au

Moz

Ag

g/t

Ag

Moz

Cu

%

Cu

Mt Mt

Au

g/t

Au

Moz

Ag

g/t

Ag

Moz

Cu

%

Cu

Mt

MACRAES

TOTAL 31.7 1.24 1.26 . . . . 85.6 1.00 2.75 . . . 117.3 1.06 4.01 . . . . 65.0 1.0 2.1 . . . .

REEFTON

TOTAL 2.01 1.70 0.11 . . . . 13.5 1.46 0.63 . . . 15.5 1.50 0.74 . . . . 7.8 3.7 0.90 . . . .

SAMS

CREEK

TOTAL . . . . . . . 4.03 1.77 0.23 . . . 4.03 1.77 0.23 . . . . 4.2 1.3 0.18 . . . .

DIDIPIO

TOTAL 18.0 1.26 0.73 . . 0.51 0.09 43.0 0.96 1.33 . . 0.39 0.17 61.0 1.05 2.06 . . 0.42 0.26 14.7 0.6 0.3 . . 0.2 0.03

EL DORADO

TOTAL 0.78 11.30 0.28 75.7 1.90 . . 3.50 9.00 1.01 67.5 7.58 . . 4.28 9.42 1.30 69.0 9.48 . . 0.8 9.4 0.3 71.0 1.9 . .

TOTAL

RESOURCE 52.4 1.41 2.38 . 1.90 . 0.09 149.7 1.24 5.96 . 7.58 . 0.17 202.1 1.28 8.34 . 9.48 . 0.26 92.4 1.3 3.7 . 1.9 . 0.03

Figures are in-situ delivered to ROM. Macraes and Reefton cut-offs are based on US$1,250/oz gold (0.4 g/t Au for Macraes Open Pit, 0.5 g/t Au for Reefton and 2.1 g/t Au cut-off for Frasers Underground).

Didipio cut-offs are Net Metal Value based, using US$1,250/oz gold and US$3.25/lb copper (0.55 g/t AuEq for open pit and 1.9 g/t AuEq for underground).

RESERVES

PROVEN PROBABLE PROVEN AND PROBABLE

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

MACRAES

TOTAL 21.2 1.00 0.68 . . 20.8 1.01 0.68 . . 42.0 1.00 1.35 . .

REEFTON

TOTAL 0.9 1.53 0.04 . . 3.3 1.40 0.15 . . 4.2 1.43 0.19 . .

DIDIPIO

TOTAL 16.7 1.23 0.66 0.52 0.09 29.0 1.00 0.93 0.42 0.12 45.6 1.09 1.59 0.46 0.21

TOTAL

RESERVE 38.8 1.11 1.38 - 0.09 53.2 1.03 1.76 - 0.12 91.9 1.06 3.14 - 0.21

All resources are inclusive of reserves. Macraes and Reefton Open Pit resource cut-off are based on $1,250/oz Au. Underground resources are reported within geological constraints. For Didipio: 0.47 g/t

EqAu cut-off above the 2,390mRL and 1.5 g/t cut-off below the 2,390mRL. No resource reported below 2,180mRL. EqAu cut-off is gold equivalent based on US$1,450/oz gold and US$3.00/lb copper.

OceanaGold retains a 40% interest in the Sams Creek project in the South Island of New Zealand. The project contains a total of 10.1 Mt @ 1.77 g/t Au for 575 koz Indicated resource, as well as 10 Mt @ 1.3

g/t Au for 440 koz of Inferred resource. 40% of the total Sams Creek inventory has been included in OceanaGold's resource table. The project is not considered material to OceanaGold. The El Dorado Project

is not considered material. Please refer to www.oceanagold.com for the press release dated October 8, 2013 for more details on the status of the permit applications and arbitration for the El Dorado Project

as at the end of 2013. El Dorado resource cut-offs are based on gold 2008 assumptions of US$980/oz and US$20/oz silver.

140901 ogc corporate presentation september north america final

Documents

particular person

purposes of ni

independent qualified

mineral resources

mineral reserves

securities of ogc

informational purposes

offer of shares