didipio site visit presentation day 2

March 2015

Didipio Operations Site Visit

Day 2

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. OGC’s shares have not been and will not be

registered under the Securities Act.

Technical Disclosure

The Mineral Resources for Didipio 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 M. Holmes, 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. M. Holmes,

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.. C. Bautista is a member of the AIG and is a “qualified person” for the purposes of NI 43-101.

Messrs Holmes, , Doyle, , Madambi, Moore 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 Company’s

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.

http://www.sedar.com/


Process Plant

Operations


Processing Highlights

• Pebble crusher installed and

commissioned in November

2014

• Debottlenecking activities

completed in 2014

• Didipio achieved an

annualised throughput rate of

3.5 Mtpa by the end of 2014

• Last three months milling

rates at or above this rate

• In 2014, 100,502 dry metric

tonnes of concentrate were

shipped

• On March 3rd, dore bar #71

pour

0

50,000

100,000

150,000

200,000

250,000

300,000

0

500,000

1,000,000

1,500,000

2,000,000

2,500,000

3,000,000

3,500,000

4,000,000

2013 A 2014 A 2015 E

Thro

ughput

(Mtp

a)

Didipio Process Plant Ramp Up Schedule


• Previous bottleneck was accumulation of harder rock

• Installation of the SABC circuit allows for larger discharge ports to be fitted in

the SAG mill

• Hard ore particles pass on to a cone crusher – reduced from 50mm to <

10mm

• Rejoins the SAG feed where it is able to pass straight through to the Ball mill

without accumulation

• Allows for reduced power consumption in breaking this harder material while

increasing throughput.

Pebble Crusher


Process Plant Flow Sheet


• Gravity Gold Recovery 19.35%

• Concentrate Grade: 24.89% Cu, 26.73g/t Au, 89.55g/t Ag

Processing 2014

Q4 2014 Q3 2014 Q2 2014 Q1 2014 Year

2014

Year

2013*

Mill feed Mt 0.87 0.85 0.64 0.75 3.11 2.58

Mill feed grade gold g/t 1.39 1.09 0.80 1.40 1.19 0.94

Mill feed grade copper % 0.83 0.90 0.79 0.90 0.86 0.98

Recovery gold % 90.2 88.3 89.4 90.2 89.5 83.0

Recovery copper % 93.8 92.3 93.3 95.4 93.7 91.5


• Processing cost for 2014 at $11.18 tonne of ore milled

• Process costs expected to range between $9 to $11 per tonne milled

• Concentrate Transport, and Smelting $315/DMT of concentrate 2014

• 2014 power costs: $0.26/kW/hr

• Jan 2015 power cost: $0.16/kW/hr

• Diesel fuel consumption for power generation

• 2015: 16 million litres



• Diesel fuel consumption for fleet




Processing Costs


Processing

0%

20%

40%

60%

80%

100%

120%

140%

160%

De

c/1

2

Jan

/13

Feb

/13

Mar

/13

Ap

r/1

3

May

/13

Jun

/13

Jul/

13

Au

g/1

3

Sep

/13

Oct

/13

No

v/1

3

De

c/1

3

Jan

/14

Feb

/14

Mar

/14

Ap

r/1

4

May

/14

Jun

/14

Jul/

14

Au

g/1

4

Sep

/14

Oct

/14

No

v/1

4

De

c/1

4

Percent Achieved of Nameplate Capacity 2.5Mtpa

Didipio actual Forecast Didipio 100% Design 2.5MTPA Industry Best std


2014 Processing Cost Actuals

$0.00

$5.00

$10.00

$15.00

$20.00

$25.00

Jan/14 Feb/14 Mar/14 Apr/14 May/14 Jun/14 Jul/14 Aug/14 Sep/14 Oct/14 Nov/14 Dec/14

$ /to

nn

e m

ille

d

Processing Costs Actual


Process Plant Ramp-Up

Cyclone Feed Pump Working Platform

Concentrate to Filter Cycle Bypass Froth Cone Upgrade Conveyor Guarding

Access Platform

Concentrate to Filter Cycle Bypass

Status Completion

Water Treatment Plant Completed & in-operation Q2

3rd Stage Tailings Pump Completed & in-operation Q3

Cone Crusher into SAG Circuit Completed & in operation Q4

Tech Taylor Valve Replacement Installation next planned

shutdown, parts on site Q1 2015

SAG Mill Liner design change On order Q4 2015


Didipio Concentrate Production Profile

• 100% of concentrate sold

to Trafigura

• Shipments made to

smelters in Asia; typically

Korea and Japan

• Gold grade in concentrate

increasing, copper grade

24 – 25%

• Transportation logistics

from mine site to port

continued improvement

with use of OGPI

concentrate trucking fleet. 0

2,000

4,000

6,000

8,000

10,000

12,000

Jan-1

4

Feb

-14

Ma

r-1

4

Apr-

14

Ma

y-1

4

Jun-1

4

Jul-1

4

Aug-1

4

Sep-1

4

Oct-

14

No

v-1

4

De

c-1

4

Copper Concentrate Production (DMT)


• Transport Route is approx. 354 kilometres

• Benchmark TC/RCs – $92/DMT /$c 9.20/lb (2014)

– $107/DMT /$c 10.70/lb (2015)

• Trucking Cost to Port $55/DMT of concentrate 2014

Concentrate Transport


OHPL Routes Phase 1 and Phase 2

OHPL Specifications

69kV single circuit

• Steel pole structure with vertical transmission lines Conductor

• Phosphorous Conductor

• Diameter – 26.30mm

13.8kV single circuit

• Underbuilt horizontal transmission line Conductor

• Quail Conductor


Earth-wire

• For lightning protection

• 12.30 OPGW

• Size – ZTT OPGW



Length of Powerline

• Stage 1 – Bambang to Didipio Substation – Approximately 63kms

• Stage 2 – Bayombong NGCP Substation to Bambang– Approximately

10kms

Capital Cost

• Approximately $15 million

• Expected supply cost once online $0.14 kWh to $0.15 kWh

Schedule

• Stage 1 is planned to be completed by end of August 2015

• Stage 2 is planned to be completed by end of December 2015 (to be

confirmed)

OHPL


OHPL Progress Photos

Stage 1 take off pole at Bambang

Stage 1 pole installation progress


OHPL Progress Photos

Stage 2 NGCP Substation Transformer

installation at Bayombong in progress Stage 1 pole installation progress

Stage 1 pole

staging


• Flotation reagent optimisation

• SAG mill liner design change

• Cleaner circuit GRG recovery program

• Promotion of Philippine nationals into positions previously held by

externally resourced employees

• Implementation for the Preventive Maintenance Strategy

Process Plant – Looking Forward


Exploration


OceanaGold’s Philippine Tenements

North Luzon

Tenements

Surigao Tenements

North Luzon

Didipio

Surigao

• Over 80k hectares of prospective ground

• Exploration still constrained by permitting issues

• Currently active in Didipio PDMF area and Paco EPs

• Proactive in generating new projects

Didipio

Tenements


Didipio PDMF - Near Mine Exploration

MINE

PIT

DDDH232 502.3m EOH

DDDH230 501.3m EOH

DDDH231 550.0m EOH

DDDH233 356.6m EOH

Didipio PDMF Area

True Blue

D’Beau

San Pedro

• Conducted deep IP/MT

survey over 30.4 line-

km using Titan 24 in

2014

• Identified targets for

drilling from a

combination of

chargeability and

resistivity anomalies

• Drill testing

commenced in late

2014 and completed in

March 2015

DDDH234 337.6m EOH

DDDH238 422.6m EOH

DDDH237 542.6m EOH

DDDH235 445.2m EOH

DDDH236 450.4m EOH

DDDH239 200.7m


Didipio – Resource Geology

Limit of

Oxidation

Dark

Diorite Dark

Diorite

Previous

Stage 5/6

Pit Design

AuEq g/t

New Stage 5 & 6

Pit Designs

Underground

Mine


Didipio – Resource Geology

Stage 5

Stage 6

September 2014 Reserve Estimates 1

Reserve Area Tonne

s

(Mt)

Au

(g/t)

Cu

(%)

Contained

Au

(Moz)

Contained

Cu

(kt)

Open Pit 22.10 0.96 0.45 1.681 100.5

Underground 15.92 1.86 0.43 0.952 68.6

Stockpiles 10.99 0.40 0.43 0.141 47.4

Didipio Total

(Sep. 30,

2014)

49.00 1.13 0.44 1.774 216.5

1 “NI 43-101 Technical Report for the Didipio Gold/Copper Operation, Luzon,

Philippines”, dated October 29, 2014, prepared by S. Griffiths, M. Holmes and J. Moore

of OceanaGold (New Zealand) Limited

Proposed UG Workings with Pit Stages 5 and 6 and 1.5+ g/t Au Eq Ore Solid


Didipio FTAA - Regional Exploration

Didipio Au-Cu

Mining Permit Area

Papaya

MMB

TNN

Mogambos

DBeau DFox

True Blue

Cabinwangan

Cu-Au-Ag

4 holes, 1200m for scout

drilling

Cu-Au±Mo

Cu-Au

Cu-Au

Cu-Au-Mo-Ag-V

5 holes, 1300m for

scout drilling

San Pedro Dilaping

Geochemical anomaly

area for drill testing

Didipio FTAA-001

Other OGC

Tenements

Magnetite/Bitotite veins

Au mineralization

Trend of replacement

style Au mineralization

EP-02-06

EPA-02-67

EP-02-07

EP-02-03

Runruno Au-Mo

• Several targets

ready for drilling

• Cabinwangan

and Papaya are

the priority

targets

• Recognised

importance of

magnetite-biotite

veins in the

prospectivity of

targets


Papaya Prospect

• 12km west of Didipio

• Grid soil sampling delineated

NE-SW trending Au-Cu

(±Pb-Zn-V) anomalies

• Anomaly coincides with

sericite-clay alteration zone

• Rock samples range from

anomalous to higher-grade

Au/Cu values

• Scout drilling when FTAA

exploration period extension

is granted

MAP

Didipio

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

>150 ppb Au

> 80 ppb Au

> 50 ppb Au

250 ppm Cu contour

200 ppm Cu contour Location of anomalous

Rock samples > 1.0 g/t Au > 350 ppm Vanadium

Proposed drillhole collar (with direction)


Cabinwangan (EPA-II-67)

• Partly outcropping mineralised

Cu-Au porphyry south of the

Runruno Au-Mo deposit

• High grade Au and Cu results

returned in rock chip sampling

• Drilling by Metals Ex identified

porphyry Cu-Au mineralisation

• Aggressive exploration once

EP application is granted

MAP Didipio

Cu Soil Anomaly

Stream catchment with

coincident Au+Cu anomaly

0 500 meters

* Historical Results

Channel Highlights:

50m @ 0.56 g/t Au and 1.12% Cu *

6m @ 1.40 g/t Au & 1.22% Cu

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

Location of anomalous

Rock samples > 1.0 g/t Au

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

Au in soil 5 10 15 210 ppb


Paco EP’s

Surigao-Agusan Mining District

Showing Gold-Copper Mines/ Deposits/

Significant Prospects

Exploration Permit

EX-XIII-02

Exploration Permit

EX-XIII-04

• Covered under two exploration permits with a combined area of 3,305 hectares

• Adjacent to high grade porphyry Cu-Au deposits

• Programme of deep penetrating IP Survey using. Titan24, MMI geochemistry to better identify targets buried under post-mineral cover prior to drilling

Bayugo Deposit:

125M tonnes at 0.60% Cu and 0.66 g/t Au (M&I)

Boyongan Deposit:

273M tonnes at 0.52% Cu and 0.72 g/t Au

Kalayaan


Paco EP’s

Boyongan

Bayugo

Au 0.6 g/t

Proposed IP Line

Cu 0.3 %

DDH Assays contoured

for the first 30 meters

of Pre-Quaternary

Bedrock.

Background Image: Magnetic Response


Mayag EPA

• Potential for large

porphyry Cu-Au

deposit

• Previous drilling by

Lepanto hit

porphyry Cu

mineralisation (Au

not assayed)

• Drilling to

commence once EP

is granted

Mayag EPA

5.31 g/t Au

and 0.04 % Cu Paco EP

Andesite

Diorite

Feldspar Porphyry

Silica ± Clay ± Pyrite

Sericite ± Quartz ± Pyrite

Clay ± Sericite

Previous drillhole collar

2012 Rock sample (labeled for > 0.5 g/t Au)

LEGEND

> 0.5 % Cu

0.3 to 0.5 % Cu

0.1 to 0.3 % Cu

< 0.1 % Cu

Rock Cu anomaly Alteration

Au anomaly in soils (>50 ppb)

Cu anomaly in soils (>500 ppm)

73.4m @ 0.70% Cu

65.8m @ 0.40% Cu

106.2m @ 0.48% Cu


Manag EPA’s

DDH-1: 90m @ 0.36% Cu

DDH-2: 205m @ 0.28% Cu and 0.1 g/t Au

DDH-14: 36m @ 0.38% Cu and 0.1 g/t Au

DDH-16: 124m @ 0.53% Cu and 0.25 g/t Au

DDH-3: 69m @ 1.07% Cu and 1.30 g/t Au

DDH-4: 125m @ 0.55% Cu and 0.65 g/t Au

DDH-6: 68m @ 0.62% Cu and 1.20g/t Au

DDH-10: 74m @ 0.58% Cu and 0.47 g/t Au

DDH-12: 26m @ 0.70% Cu and 0.63 g/t Au

Baren River

EXPA-02

EXPA-54

EPA

Baren River Greenwater

Anidaan

Tawini

Mekanan

Padawan Upper Tawini

Previous drillhole collar

Cu anomaly in soils

Sulfidic Breccia

Hornblende Granodiorite

Granodiorite Intrusion

Volcanics

Sediments

Limestone Structure

Baren River Pull-apart basin

Manag Prospect Gold rich porphyry copper

DDH-1: 90m @ 0.36% Cu

DDH-2: 205m @ 0.28% Cu and 0.1 g/t Au

DDH-14: 36m @ 0.38% Cu and 0.1 g/t Au

DDH-16: 124m @ 0.53% Cu and 0.25 g/t Au

DDH-3: 69m @ 1.07% Cu and 1.30 g/t Au

DDH-4: 125m @ 0.55% Cu and 0.65 g/t Au

DDH-6: 68m @ 0.62% Cu and 1.20g/t Au

DDH-10: 74m @ 0.58% Cu and 0.47 g/t Au

DDH-12: 26m @ 0.70% Cu and 0.63 g/t Au

Baren River

• Historical drilling found high

grade porphyry

• Non-JORC resource of 13.6Mt

@ 0.54 g/t Au, 0.47%Cu

• More drilling when EPA is

granted


Community


Key Community Investments Overview

Building Capacity

Not Dependency

Enterprise Development

DICORP

• Awarding of long term contracts (camp

catering, laundry services, housekeeping,

hauling, shuttle, road maintenance)

Establishment of Cooperatives

• To facilitate projects and create

livelihood, e.g. hardware store etc.

Infrastructure

• Opening/Upgrade of Community Roads

• School buildings

• Hospital/Health facilities

• Sports Complex

• Community Centers

• Water Systems

• Sanitary Landfill

OGSAI • Partnership with local government units

and community associations or farmers

• Reforestation of denuded areas

• Establishment of agroforestry

• Profit sharing

• Employment

Education Scholarships Salary Subsidies,

financial assistance

Health &

Nutrition

Medical Missions,

Salary Subsidies,

Access to site clinic

Human Resource Development

Sites Skills UG Simulation Capacity Building Entrepreneurship Training

Pre-employment training First Aid / ERT

Socio- Cultural

& Sports

Sports/Local Festivals

Religious celebrations


2014 Spend on Community Investments

Infrastructure Assistance

Education

Capacity Building

Sports and Socio-Cultural Development


Health and Nutrition

Over US$3 million investment in community programs & initiatives in 2014


Infrastructure

• Construction and improvement of farm to market roads and small bridges within the host and neighboring communities

• Construction of day care centers, school buildings and classrooms

• Construction of community police outpost, post harvest facilities – solar dryers

• Construction of community centers, waiting sheds


Education

• Scholarships and financial assistance provided to more than 200 residents of host and neighboring communities

• 48 teachers’ salaries subsidized

• Supported school activities (campus journalism training, nutrition month celebrations, intramural sports activities)


Capacity Building

• Assessment and planning workshops with community development councils

• Leadership training for university scholars

• Training on Local Governance for newly elected community council members

• Training on Disaster Risk Reduction Management and Basic Cost Estimation for Infrastructure Projects

• Pre-employment training


Health & Nutrition

• Salary subsidies for 55 community health workers and nutrition scholars

• Construction and/or improvement of small water systems

• Provision of medicine, materials and equipment for community clinics

• Provide access to company clinic and medical team

• Training on first aid for community health workers


Socio-Cultural and Sports

• Participation and support to village fiestas, community gatherings (weddings, wakes),

• Participation and support to Municipal and Provincial Foundation Day celebrations

• Support to religious/church activities


Enterprise Development – DiCorp

• Didipio Community Development Corporation (DiCorp) employs almost 300 from local communities

• Awarded contracts in camp catering, housekeeping, laundry and employee shuttle services, manpower pool, road maintenance, copper concentrate haulage, environmental services.

• Gross revenue of US$5.9M in 2014


Enterprise Development – Cont.

• Livelihood Direction Setting Workshop in partnership with a local state university and provincial offices of the Departments of Agriculture, Trade and Industry

• Training on Enterprise Development and Business Planning

• Organized community cooperatives that now serve as conduit for the funds allocated for small enterprises

• Conducted pre-membership seminars for community residents applying for membership to the cooperatives

• Established new community hardware store managed by a cooperative

• Supported existing small businesses (poultry, swine raising, fish farming)


Enterprise Development – OGSAI

Achievements as of Dec. 2014

OceanaGold Sustainable Agroforestry Inc.

309,000+ trees planted

412,000+ seedlings donated (propagated and

purchased)

326+ hectares reforested (including 100 ha

commercial plantation)

110 farmer/landholders benefitting from

commercial & reforestation plantations est.

Established company nursery producing

seedlings for plantations


Communications

Publications and AV Presentations

• Bimmoble – Multilingual community newspaper

• Didipio News – Company newsletter for employees

• AVPs on various programs

Press Releases

• Radio • Local and national

newspapers • Other media

Events Based Campaigns

Immersion - Community Activities

• Setting up of information booths during Municipal and Provincial Foundation days

• Participation in sponsored events (fun run, medical missions)

• School Events • PMSEA/PMC exhibits

• Community Festivities • Sports League • Weddings


Other Company CSR Initiatives

Integrated River Basin Management in

partnership with International River Foundation

Road Safety Awareness

Employee Donations to Children’s Hour Projects

Micro financing with Grameen Australia

Philippines

Emergency Response to National Disasters in

the Philippines

Housing Project for Typhoon Yolanda Victims

with Gawad Kalinga

Rehabilitation of Classrooms with Habitat for

Humanity

Support to Entrepreneur based projects

implemented by students with ENACTUS


2015 Outlook

Infrastructure


Human Resource Development

• Community Water System • 2.2 km road concreting • 22 km provincial road rehabilitation

& maintenance • Sanitary Landfill • School Buildings • Community Infrastructure Facilities

• Cooperatives Establishment & Strengthening

• Capacity Building of LGUs & People’s Organizations

• Network Building for Enterprise Marketing and Sustainability

• College Scholarship (200 students) • Salary/Subsidy

• Teachers (53) • Health Workers (18) • Village Workers Engaged in SDMP

Implementation (17)

• School Events & Health Programs • Youth Development • Socio-Cultural Activities • Support to Religious Activities and

Vulnerable Groups • Support to Municipal Governments • Socio-economic Impact Assessment

Expected Spend in 2015

US$5M

Innovation Performance Growth

oceanagold.com

didipio site visit presentation day 2

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