OceanaGold Fact Book 2013 · 2019-12-19 · 2010 Buyback of gold hedge book. Macraes three millionth ounce of gold poured. 2011 Didipio Mine construction recommenced in June. Record

OceanaGold Fact Book 2013Innovation PerformanceGrowth

Cautionary Statement Regarding Forward Looking Information

This Fact Book contains “forward-looking statements and information” within the meaning of applicable securities laws which may include, but is not limited to, statements with respect to the future financial and operating performance of the Company, its subsidiaries and affiliated companies, its mining projects, the future price of commodities, the estimation of Mineral Reserves and Mineral Resources, the realisation of Mineral Reserve and resource estimates, costs of production, estimates of initial capital, sustaining capital, operating and exploration expenditures, costs and timing of the development of new deposits, costs and timing of the development of new mines, costs and timing of future exploration and drilling programs, timing of filing of updated technical information, anticipated production amounts, requirements for additional capital, governmental regulation of mining operations and exploration operations, timing and receipt of approvals, consents and permits under applicable mineral legislation, environmental risks, title disputes or claims, limitations of insurance coverage and the timing and possible outcome of pending litigation and regulatory matters. Often, but not always, forward-looking statements and information can be identified by the use of words such as “plans”, “expects”, “is expected”, “predicts”, “budget”, “scheduled”, “estimates”, “forecasts”, “intends”, “targets”, “aims”, “anticipates” or “believes” or variations (including negative variations) of such words and phrases, or may be identified by statements to the effect that certain actions, events or results “may”, “could”, “would”, “should”, “might” or “will” be taken, occur or be achieved. Forward-looking information or statements contain information that is based on assumptions, forecasts of future results, estimates of amounts not yet determinable, and therefore involve known and unknown risks, uncertainties and other factors which may cause the actual results, performance or achievements of the Company and/or its subsidiaries and/or its affiliated companies to be materially different. For a list of risk factors, please refer to the Company’s Annual Information Form in respect of its fiscal year-ended December 31, 2012, which is available on SEDAR at www.sedar.com under the Company’s name. Forward-looking statements and information contained herein are made as of the date of this document and, subject to applicable securities laws, the Company disclaims any obligation to update any forward looking statements and information, whether as a result of new information, future events or results or otherwise. Readers should not place undue reliance on forward-looking statements and information due to the inherent uncertainty therein. All forward-looking statements and information made herein are qualified by this cautionary statement.

Cautionary Notes Regarding Technical Information

Standards: This Fact Book includes disclosure of scientific and technical information, as well as information in relation to the calculation of reserves and resources, with respect to OGC’s mineral projects. OGC’s disclosure of Mineral Reserve and Mineral Resource information is governed by National Instrument 43-101 – Standards of Disclosure for Mineral Projects (“NI 43-101”) under the guidelines set out in the Canadian Institute of Mining, Metallurgy and Petroleum (the “CIM”) Standards on Mineral Resources and Mineral Reserves, adopted by the CIM Council, as may be amended from time to time by the CIM (“CIM Standards”). The disclosure of Mineral Reserve and Mineral Resource information relating to OGC’s properties is also presented in accordance with the reporting requirements of the 2012 Edition of the “Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves” (“JORC Code”). Estimates of Mineral Resources and Mineral Reserves prepared in accordance with the JORC Code would not be materially different if prepared in accordance with the CIM definitions applicable under NI 43-101. There can be no assurance that those portions of Mineral Resources that are not Mineral Reserves will ultimately be converted into Mineral Reserves. Mineral Resources are not Mineral Reserves and do not have demonstrated economic viability. This Fact Book uses the terms “Measured”, “Indicated” and “Inferred” resources. U.S. persons are advised that while such terms are recognized and required by Canadian regulations, the Securities and Exchange Commission does not recognize them. U.S. persons are cautioned not to assume that all or any part of Measured or Indicated Resources will ever be converted into reserves. U.S. persons are also cautioned not to assume that all or any part of an Inferred Mineral Resource exists, or is economically or legally mineable.

Technical Reports: For further information regarding OGC’s properties, reference should be made to the following NI 43-101 technical reports have been filed and are available at www.sedar.com under the Company’s name: (a) “Technical Report for the Macraes Project located in the Province of Otago, New Zealand” dated February 12, 2010, prepared by R. Redden and J. G. Moore, both of Oceana Gold (New Zealand) Limited; (b) “Independent Technical Report for the Reefton Project located in the Province of Westland, New Zealand” dated May 9, 2007, prepared by J. S. McIntyre, I. R. White and R. S. Frew of Behre Dolbear Australia Pty Limited, B. L. Gossage of RSG Global Pty Limited and R. R. Penter of GHD Limited; and (c) “Technical Report for the Didipio Project located in Luzon, Philippines” dated July 29, 2011, prepared by R. Redden and J. Moore of Oceana Gold (New Zealand) Limited. An update of the Reefton technical report is underway and is expected to be released mid-year.

Each of the authors of the Technical Reports is independent of the Company within the meaning of NI 43-101 except for R. Redden and J.G. Moore. R. Redden was a full-time employee of the Company’s subsidiary, Oceana Gold (New Zealand) Limited at the time of writing, and J.G. Moore was, and remains, a full-time employee of Oceana Gold (New Zealand) Limited. The Technical Reports have been filed with the Canadian securities regulatory authorities and are available for review at www.sedar.com under the Company’s profile.

Where the Mineral Reserve and Mineral Resource estimates of the Company’s Reefton and Macraes Projects set out in this Fact Book differ from those set out in the Technical Report for the relevant property, such differences arise from updates to such Mineral Reserve and Mineral Resource estimates as a result of depletion through production and additional exploration activities.

The latest updates of Mineral Reserves for each of the Company’s New Zealand projects were prepared by, or under the supervision of, K. Madambi, while the Mineral Reserves for the Didipio Project were prepared under the supervision of R. Corbett. The updates of Mineral Resources for the Reefton and Didipio Projects were prepared by, or under the supervision of, J. G. Moore, whilst the updates of Mineral Resources for the Macraes Project were updated by S. Doyle. 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 and each has sufficient experience relevant to the style of mineralisation and type of deposit under consideration and to the activity which they are undertaking to qualify as a Competent Person as defined in the JORC Code. Messrs Corbett, Doyle, Madambi and Moore consent to inclusion in this Fact Book of the matters based on their information in the form and context in which it appears.

OceanaGold has adopted United States dollars (USD) as its presentation currency. The financial information is presented in USD and all numbers in this document are expressed in USD unless otherwise stated.

5 The Business at a Glance 6 OceanaGold at a Glance 8 Chairman Letter 9 CEO Letter11 Vision & Values11 Strategy12 Investment Highlights13 Operating Summary

15 Operations16 Macraes Goldfield, New Zealand17 Macraes Open Pit18 Frasers Underground19 Processing, New Zealand20 Reefton Goldfield, New Zealand22 Didipio Mine, Philippines26 Exploration27 Reserves & Resources28 Sustainability

31 Financials and Investor Information

32 Five Year Financial Summary33 Operating Costs34 Capital Expenditure 35 Share Information36 Our Team 38 Glossary39 Key Investor Dates

and Corporate Directory

Contents

Didipio Mine process plant, completed December 2012, Philippines

Multinational Gold Producer and Developer

The Business at a Glance

5

Didipio Mine

Luzon

Mindanao

Manila

Wellington

Auckland

Macraes Open PitFrasers Underground

Reefton Open Pit

Christchurch

Dunedin

HQ

Map of Operations

* Resources are inclusive of reserves and reserves are in situ ounces. Refer to page 27 for full Resource/Reserves Statement.

Philippines

New Zealand

Mineral Reserves Gold (Moz) Copper (’000t)

Total Reserves 3.64 240

– Proven 1.55 90

– Probable 2.09 150

Mineral Resources Gold (Moz) Copper (’000t)

Resources* 10.13 340

– Measured & Indicated 6.73 290

– Inferred 3.40 50

6 The Business at a Glance

OceanaGold at a Glance

OceanaGold TodayOceanaGold is a significant multinational gold producer listed on the Toronto, Australian and New Zealand stock exchanges. The Company has a portfolio of operating, development and exploration assets located in the South Island of New Zealand and in the Philippines. There were 1,171 full time employees at the end of 2012.

The Company is forecast to produce approximately 240,000 ounces of gold per annum from its New Zealand operations. Commissioning of the Didipio Mine in northern Philippines commenced on schedule in the fourth quarter of 2012. Commercial production is expected to be achieved in the second quarter of 2013.

Financial Snapshot

Year ended 31 December 2012 2011 2010 2009 2008

Gold Revenue US$m 385.4 395.6 305.6 237.1 217.2

EBITDA1 US$m 144.6 163.9 139.5 106.2 66.1

Operating Profit US$m 53.1 78.5 71.8 40.4 13.5

Earnings Before Income Tax1 US$m 31.7 65.2 55.4 25.6 (2.5)

Net Profit/(Loss) US$m 20.7 44.2 44.4 54.5 (54.7)

Diluted Earnings/(Loss) Per Share US$ 0.08 0.17 0.20 0.29 (0.34)

Cash and Cash Equivalents US$m 96.5 170.0 181.3 42.4 9.7

Gold Produced oz 232,909 252,499 268,602 300,391 259,812

Gold Sold oz 230,119 249,261 268,087 300,044 264,124

Average Gold Price Received US$/oz 1,675 1,587 1,140 790 822

Cash Operating Cost US$/oz 940 875 570 411 532

Cash Operating Margin US$/oz 735 712 570 379 290

1. Excluding gain/(loss) on undesignated hedges

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Production Profile

GoldCopper

Company History1990 Macraes Mining Company Limited commenced gold production at Macraes.1991 Reefton Goldfield acquired from CRA Limited.1999 Pressure oxidation and autoclave facility commissioned at Macraes, only one of three in the southern hemisphere.2003 Oceana Gold Ltd Incorporated.2004 Oceana Gold Ltd listed on ASX and NZX.2005 Two millionth ounce of gold poured from Macraes Open Pit Mine.2006 Merger with Climax Mining bringing the Didipio Project into the Company.2007 OceanaGold Corporation listed on TSX. Reefton Open Pit Mine commissioned. Flotation cells commissioned at Macraes, the largest of this type operating in the world.2008 Frasers Underground Mine commissioned. Didipio placed under care and maintenance following Global Financial Crisis.2009 Record gold production for New Zealand operations (300,000 oz).2010 Buyback of gold hedge book. Macraes three millionth ounce of gold poured.2011 Didipio Mine construction recommenced in June. Record gold revenue and cash flow from operations.2012 Didipio Mine construction completed and commissioning commenced in fourth quarter as planned. First concentrate produced from the Didipio Mine in December.

OceanaGold Corporation Fact Book 2013 7

Chairman Letter

During 2012, your Company has achieved the long-standing strategic objective of adding a low cost gold producing asset to its production portfolio. Thus, as an unhedged producer, OceanaGold has taken a major step in derisking the future of the Company in what are uncertain times in the global economic landscape.

Achieving this objective has not been without its challenges, for those of you with the patience to be stakeholders, from before the 2008 global financial crisis may recall. We commenced construction at Didipio in late 2007 but in mid-2008 needed to suspend this activity until 2010, when we recommenced final design and construction.

All the while, our New Zealand operations provided the operating base from which we could provide assurance to our investors that the skills honed there, in what are low margin assets would stand us in great stead as we built Didipio. And, with the addition of a very experienced project team headed by Martyn Creaney, your Board is proud to say the job was completed in 2012.

Management of the Company has been progressively bolstered over the last two years to address future growth, and the general slowing of boom times in the resource sector is reflecting in a broader pool of talent as we look to adding exploration and business development assets. Exploration success, in particular in the Philippines, is one area where OceanaGold has been constrained in affording stakeholders exposure to significant upside value. We hold a broad portfolio of advanced exploration assets in the Philippines and it is our hope that in 2013, some of this latent value can be brought to account. I reflect that, in spite of a great 2012 year for increase in share price, this was done without material success in exploration (largely due to a moratorium on permits in the Philippines) as a vital pillar in investor confidence.

The distress that is emerging in the junior mining sector as commodity cycles mature and funding sources become more problematic is likely to provide opportunities for OceanaGold to complement its current asset base.

Thank you for your support through the year and, in many cases, your patience in standing by the Company as Didipio is finally being commissioned. It is an asset with great economics and an extraordinarily long reserve life which will underpin the endeavours of OceanaGold for years to come.

Sincerely,

Jim Askew, Chairman of the Board March 2013

“Our journey to transform the Company has only just begun…”

Mick Wilkes

“Didipio…will underpin the endeavours of OceanaGold for years to come.”

Jim Askew


CEO Letter

The year saw significant change in the organisation of the company as we transform into a multinational gold producer. Our long serving Chief Operating Officer, Mark Cadzow, has moved into a development role as Chief Development Officer, charged with carrying out feasibility studies and executing major capital projects. This is a critical new role that will drive us to excel in investing in good quality assets for new production whilst maintaining strong capital discipline, as we have demonstrated at Didipio. To replace Mark we have been fortunate to recruit a highly experienced operations executive in Michael Holmes. Michael comes to us from Xstrata Copper where he held the General Manager position for two major copper operations over a number of years, and brings to the company a new improved standard of managing and operating our business. More steps will be taken in the coming years to transform our company and prepare ourselves for the opportunities that lie ahead that will make OceanaGold a low cost long life gold mining company.

Our journey to transform the Company has only just begun with the development of Didipio, which has given us a great position to further invest in our future. The Board and Management of OceanaGold are committed to delivering strong returns to shareholders over the long term, and are working hard to deliver on our commitments. We thank all those partners and stakeholders who have supported us so far on our journey, and we look forward to sharing the rewards of our endeavours in the years to come.

Mick Wilkes, Managing Director and CEO March 2013

2012 was a busy year for OceanaGold. Our achievements were reflected in the performance of our share price, which was one of the better performing gold stocks on the ASX and the TSX in 2012.

There were two primary reasons for this strong performance:

1. The successful completion of construction and start of commissioning of the Didipio Mine. The mine was built on time which is rare in the market these days, and is a great credit to the project development team. Although the capital costs were slightly over the original budget, they were not excessive and were always under control which is a creditable result.

2. Successfully refinancing our debt with the negotiation and execution of a US$225 million term and revolving credit facility with the consortium of six large international banks. This greatly enhanced the strength of our balance sheet and is the first important step in developing long term debt financing partners.

Our safety performance also improved in 2012 with a Total Recordable Injury Frequency Rate (TRIFR) of 8.1 (in 2011 it was 13.1). However, our improved safety performance was again marred by the tragic death of one of our contractors at Didipio, who was drowned following a severe storm at site. We continue to work tirelessly to improve our safety performance, and we are seeing results over the past eight months, particularly at Didipio, where I am pleased to report we have amassed almost 4 million man-hours without a lost time injury.

Production from our operations in New Zealand was slightly below our expectations for the year after setbacks at the Frasers Underground at Macraes, caused by geotechnical issues and heavy rainfall in the third quarter. Geotechnical risks are part and parcel of mining, and we have adapted some design parameters to accommodate the risk, particularly in the underground. I am confident in the technical ability of our team to manage all the risks in our business going forward, and management are focused on improving our planning and forecasting processes, which is so important in running a successful modern mining business.

The last quarter saw a very strong finish to the year in terms of gold production, with higher grades being mined and processed from both the Macraes and Reefton open pits. These higher grades are expected to continue at Macraes for at least part of 2013 and hence we are expecting a stronger year of production from New Zealand with lower unit costs. Overall production across the business is expected to increase by around 30% in 2013 as Didipio comes on stream, with costs falling by a similar percentage.


Our Motto

InnovationPerformanceGrowth

Top and far right: Didipio Mine process plant, PhilippinesAbove: Control room at Didipio Mine, Philippines


Vision & Values

OceanaGold Vision We will be a mid tier, multinational gold producer delivering

superior shareholder returns in a safe and sustainable manner by discovering, acquiring, developing and operating high quality gold assets.

We will be the partner, employer and gold company of choice.

We are a values based organisation and will achieve this through:– World class skills in operational efficiency, mine design

optimisation and converting opportunities;– Being the partner and employer of choice with a clear

focus on safety, environment, employees, communities and government; and,

– Maintaining a strong balance sheet with low debt, strategic capital allocation and a strong investor base.

Our Values The ‘right way’ to do things at OceanaGold is through demonstrating the following values:

– Respect– Integrity– Teamwork– Innovation– Action– Accountability

Strategy

The Company’s business strategy is to: – Maintain steady-state production in New Zealand, maximising

profitability through efficient operations and judicious investment;

– Successfully ramp up the Didipio Mine to its full potential;– Develop new reserves and resources at its existing mines

from in-pit and near mine exploration or from satellite projects located within the current tenements;

– Implement performance excellence programs that drive efficiency and increase profit margins from our existing operations; and,

– Pursue selective accretive acquisition and exploration opportunities that are complementary and add low cost gold reserves to the business.


Above: Frasers Underground, New ZealandRight: Macraes Open Pit Mine, New Zealand

Solid production growth with reducing cash cost profile.

Proven & probable reserves of 3.64 million ounces of gold and 240,000 tonnes of copper.

Total resources of 10.1 million ounces of gold and 340,000 tonnes of copper.

The Didipio Mine in Luzon, Philippines is expected to commence production in Q2 2013 and is forecast to be one of the lower cost gold mines (net of by-product credits) globally.

Strong management team with significant experience and proven track record in acquiring, developing and operating gold mines internationally.

Solid reputation for operational excellence in environmentally sensitive areas.

Extensive history of successful commitment to sustainability.

Multinational Gold ProducerOrganic Growth StrategyFocused on Profitability

Investment Highlights


Operating Summary

OceanaGold’s producing assets are Macraes (Open Pit and Frasers Underground) and the Reefton Open Pit mine, located in the South Island of New Zealand. Commercial production of the Didipio Mine is expected to commence in the second quarter of 2013.

Financial Statistics 2012 2011 2010 2009 2008

Gold Sales (Ounces) 230,119 249,261 268,087 300,044 264,124

Average Price Received (US$ per ounce) 1,675 1,587 1,140 790 822

Cash Operating Cost (US$ per ounce) 940 875 570 411 532

Cash Operating Margin (US$ per ounce) 735 712 570 379 290

Non-Cash Cost (US$ per ounce) 401 350 260 219 190

Total Operating Cost (US$ per ounce) 1,341 1,225 830 630 722

Combined Operating Statistics 2012 2011 2010 2009 2008

Gold Produced (ounces) 232,909 252,499 268,602 300,391 259,812

Total Ore Mined (tonnes) 6,872,686 8,103,693 7,905,464 6,258,806 5,629,135

Ore Mined Grade (grams/tonne) 1.34 1.21 1.43 1.85 1.69

Total Waste Mined (tonnes) incl pre-strip 54,580,473 59,176,017 57,643,657 61,087,834 52,726,488

Mill Feed (dry milled tonnes) 7,432,375 7,588,354 7,081,488 6,913,713 6,737,962

Mill Feed Grade (grams/tonne) 1.20 1.25 1.45 1.68 1.52

Recovery (%) 81.0% 82.9% 81.6% 80.0% 79.1%

Full details can be found in the quarterly Management Discussion and Analysis (“MD&A”) documents available on the Company’s website.

Investment Highlights


Aerial view of Macraes Goldfield, New Zealand

We discover, develop and operate quality assets in a safe and sustainable manner

Operations

15

Facts

Above: Rehabilitated waste rock stacks at MacraesLeft: Dump trucks at Macraes Open Pit Mine

Mine Type

Open PitGold Resources (Moz)

4.38Gold Reserves (Moz)

1.47Estimated Mine Life (Based on current assumptions)

2020Gold Production125,000– 145,000(oz per annum)

16 Operations

Macraes Goldfield, New Zealand: Macraes Open Pit

Explosives are blasted to loosen the rock prior to excavation by hydraulic diggers. In areas containing gold, Ore Spotters are employed to supervise the extraction of the ore. Dump trucks haul the ore to the Run of Mine (ROM) pad for processing to begin, whilst waste rock (rock that doesn’t contain gold) is hauled to “rock stacks”, designed to blend in with the surrounding landscape. The average Life of Mine strip ratio is approximately 10-12:1, however may fluctuate year on year depending on the mine plan and amount of pre-strip activity.

At Macraes, average mining costs for the open pit are approximately US$1.50-US$1.80 per tonne mined.

History of mining at MacraesThe Macraes area is a mature exploration province with the earliest alluvial mining occurring in 1862. In 1989, the original Macraes tenements were sold by Golden Point Mining and BHP Gold Mines (New Zealand) to the Macraes Mining Company. After a series of company name changes, OceanaGold became the owner in May 2004. In January 2008, the Frasers Underground mine was commissioned.

The Macraes Goldfield is New Zealand’s largest gold producing operation and consists of the Macraes Open Pit and Frasers Underground mine, with an adjacent process plant inclusive of an autoclave for pressure oxidation of the ore. OceanaGold’s mining and exploration tenements at Macraes cover a contiguous area of more than 25,000 hectares. The Macraes mine is located 90 kilometres north of Dunedin in the Otago region of New Zealand’s South Island. It has been in operation since 1990 and has produced approximately 3.7 million ounces of gold (as at the end of December 2012).

Ore BodyThe Macraes ore body is located within a shallow dipping shear zone which dips 15 – 20 degrees to the Northeast and has a known strike extent in excess of 30 kilometres. Gold is mostly associated with sulphides, and occurs principally as microblebs within pyrite and arsenopyrite grains. This gold is refractory and is not readily recoverable by standard cyanidation methods. Frasers Stage 5 and Frasers West are the only open pit stages currently being mined and supply approximately 5.0 million tonnes of ore per annum to the process plant, while the Frasers Underground mine supplies a further 0.8 million tonnes of ore per annum. Stockpiles of ore provide supplementary feed when required. The current combined open pit, stockpile and underground reserves of 1.65 million ounces of gold support a mine life at Macraes extending to at least 2020.

Benches of 7.5 metres are drilled and are mined in three 2.5 metre flitches. Mine Technicians collect samples from the drill rig at 2.5 metre vertical intervals which are dispatched to an on site laboratory for gold analysis. The Mine Geologists use the assay data, in conjunction with geological mapping, to create a 3D model of the grade distribution for each flitch. These models are used to delineate areas of ore and waste.

Operational StatisticsMacraes Goldfield operation statistics include Macraes Open Pit and Frasers Underground mines.

Operating Statistics 2012 2011 2010 2009 2008



– Macraes Open Pit 4,830,969 5,742,884 5,446,063 3,927,997 3,605,788

– Frasers Underground 727,087 847,020 919,792 905,674 716,213


– Macraes Open Pit 1.14 0.90 1.02 1.40 1.37

– Frasers Underground 2.24 2.20 2.66 2.83 2.28




Recovery (%) 81.1% 83.3% 81.3% 79.6% 78.6%

Mining Fleet

Type Quantity Gross Weight (tonnes)

Payload

Excavators 4 180-350 21-39 tonnes

Dump Trucks 20 250-318 147-191 tonnes

Water Trucks 2 59,000-130,000 L

Drills 4

Tracked Dozers 3

CAT Graders 3

Wheeled Dozers 1 69

Loaders 4 18-55 7-15 tonnes


Mine Type

UndergroundGold Resources (Moz)



2017

FactsMacraes Goldfield, New Zealand: Frasers Underground

Frasers Underground mine was developed to target down-dip extensions of the Hangingwall Shear mineralisation currently being mined in the Macraes Open Pit. The underground mine, which was commissioned in January 2008, is currently 625 metres below surface and 110 metres below sea level, with over 35 kilometres of developed tunnel drives.

Mining is focused on the higher grade, upper section of the Hangingwall Shear. Drilling from the dedicated exploration drive is ongoing and continues to extend mine life.

Ore BodyThe ore body is the down dip extension to Macraes, open at depth and sits on the Hangingwall Shear as well as along structurally lower, sub-parallel shears. Within Panel 2 of the Frasers Underground mine, the Hangingwall Shear mineralisation is typically between 5 and 10 metres thick.

MiningMining is performed using retreat long hole open stoping. Narrow pillars are left between the stope voids which are 15 metres wide and up to 200 metres long.

Production stoping has recently commenced along a second and thinner mineralised shear, 10 to 20 metres beneath, and sub-parallel to the Hangingwall Shear.

OceanaGold continues to drill in front of the mining face to keep reserves ahead of the mining phase and thus mines one year and replaces with one year of reserves.

The mine produces about 800,000 tonnes of ore per year using a highly mechanised mining fleet of electric/hydraulic powered drill rigs, large 50 tonne dump trucks and remote controlled loaders that enter the mining stopes that are too dangerous for personnel.

In late 2012, the development of a fibre optic cable linked to the lower levels of the Frasers Underground allowed for remote bogging from a surface (above ground) facility.

The main entrance to the mine is a 5.0 metre wide by 6.0 metre high decline that spirals down beside the ore at a gradient of 1.0 vertical metre per 7.0 horizontal metres and access to the mining areas is by smaller 4.5 metre by 4.5 metre headings.

Fresh air, at a rate of 2,010 cubic metres per second is brought into the mine via the decline and a 350 metre long vertical shaft. The shaft’s ladderway provides an additional entry/exit point to the mine. A dewatering station pumps out water up to 17 litres per second. Other infrastructure underground include a refuelling station, emergency shelter, explosives magazine, pumping stations, electrical transformers, a lunch room and small workshops.

Mining costs at the underground mine are approximately US$40-US$45 per tonne of ore mined.

Gold Production40,000– 50,000(oz per annum)

Frasers Underground jumbo drilling

18 Operations

Processing, New Zealand

The autoclave operates at pressure of 3,140 kilopascals and an average temperature of 225 degrees Celsius. Grind size is important to the oxidation kinetics and feed is finely ground with approximately 90% of the feed at 20 microns. The autoclave is designed for 50 minutes residence time targeting 98% oxidation, however these targets vary with feed from Macraes and Reefton to optimise CIL recoveries.

Flotation recovery is approximately 88-90%, CIL recovery is around 90-93% with an overall recovery greater than 81% achieved over the last three years. Overall recovery improvement has been achieved through optimising autoclave oxidation rates to produce better CIL recoveries.

The end product is a bar of doré bullion which is approximately 90% pure weighing 18-20 kilograms and containing around 600 gold ounces. The doré bars are sold and transported to the Perth (Australia) Mint for further refinement.

Routine maintenance is carried out at the process plants to ensure optimal throughput and efficiency. Sections of the plant are shutdown at different frequencies and duration to allow maintenance to be conducted. As a result, plant utilisation is approximately 95% of the year.

Processing costs for Macraes Open Pit and Frasers Underground are approximately US$9.00 to US$10.00 per tonne of ore milled. Reefton processing costs are approximately US$15 per tonne ore milled and include transportation costs of approximately US$13 per ounce and Macraes processing charges. Macraes processes on average 45,000 tonnes of Reefton concentrate annually.

OceanaGold currently operates two processing plants in New Zealand. At Macraes, the processing plant is situated within short distance of the open pit and includes a pressure oxidation plant for the processing of sulphide ore.

The Macraes process plant is capable of treating approximately 6 million tonnes of ore per annum which is put through crushing, grinding, flotation, fine grinding, pressure oxidation, carbon in leach (CIL), elution, electro winning and smelting. Refractory ore requires multistage processing to increase recoveries. Since 2007, flotation concentrate from the Reefton mine has been transported by rail and road to Macraes to utilise surplus autoclave capacity.

At the second processing plant in Reefton, the ore is put through crushing, grinding, flotation and concentrate dewatering. The processing plant is operating well above its name plate capacity of 1 million tonnes per annum with current throughput approximately 1.6 million tonnes per annum.

At Macraes, the Ball Mill Work Index is 12.5 kilowatt hours per tonne (kWh/t). At Reefton, the Crushing Work Index averages 11.6 kWh/t and the Ball Mill Work Index is 17.0 kWh/t.

Refractory gold concentrate produced from the Reefton processing plant is transported 600 kilometres by road, rail, and then road again to Macraes for treatment through the autoclave pressure oxidation and carbon in cyanide leaching to release the gold. Without this technology it would be hard to realise the value as direct leaching of refractory concentrate to obtain gold results in very poor recoveries.

Run-of-MineOre

Run-of-MineOre

ROMBin

ROMBin

Ball Mills

EmergencyFeed

Grizzly

Unit Cells andCleaners

Cyclones

FloatTails

Mixed TailsDam

ElutionColumn

RegenKiln

BarrenCarbon

CIL 1CIL 2 CIL 3

CIL 4CIL 5

Tk-09

Gold Bullion

15m ConWashThickener

Loaded Carbon

Scats

Vent Scrubber

Autoclave

Autoclave Discharge Wash Thickeners

Flash Vessel

FloatTailCIL

Tail

Discharge Wash Solution

Macraes Con Storage

Inco Cyanide Kill Unit

RegrindMill

Limestone

Wash Water

Jaw

Mill 500

Mill 02

Mill 350

Rougher/scavengers3 X 300 m3 and 2 X 150 m3

³

Recleaners 6x16 m3

³

Cleaner-Scavengers5x38 m3

³

CIL 6

Reefton Con Storage

Storage Bin

Repulp

From Reefton

Isamill

CampaignTreatment

JawCrusher

SAGMill 01

Cleaners4x38 m3

ElectrowinningCells

BarringFurnace

Eluate

Flow diagram for Macraes processing plant



Quick Facts: Reefton’s gold rush occurred in the 1860s and it was the first town in the Southern Hemisphere to have electric street lighting.

The average life of a tyre on a dump truck is approximately one year and costs about US$40,000 to replace. There are generally six tyres on a truck.

Mine Type

Open PitGold Resources (Moz)



2017

Facts

Reefton mine, aerial viewBelow: Blast in the open pit at Reefton


20 Operations

Reefton Goldfield, New Zealand: Reefton Open Pit

The Reefton mine operates 24 hour days, 7 days per week, with 12 hour shifts and the transition to owner mining was completed in April 2011.

The average Life of Mine strip ratio is approximately 10-12:1, however may fluctuate year on year depending on the mine plan and amount of pre-strip activity.

Reefton mining costs are approximately US$2.30 to US$2.50 per tonne mined.

Reefton HistoryThe Reefton Goldfield is historically one of New Zealand’s most prolific gold mining areas, having produced over two million ounces of gold from underground mining from when gold was first discovered in the Reefton area in about 1870 until the last large underground mine closed in 1951.

The Reefton Goldfield is home to two dominant styles of gold mineralisation; high grade coarse native gold associated with minor sulphides in quartz veins and lower grade microscopic refractory gold within sulphides. While the coarse native gold is historically important, the second style of lower grade mineralisation adjacent to the main gold bearing shear zones is the project’s current target.

The Reefton mine was commissioned in 2007 and comprised of a series of open pits developed along a major regional shear structure and its offshoots with a combined area of 23,412 hectares. It is located seven kilometres southeast of the township of Reefton, a historic mining district in the West Coast region of New Zealand’s South Island.

Ore BodyMineralisation is hosted within a complex network of shears that typically dip at 60 degrees near-surface and shallow to 40 degrees at depth. Underground miners historically worked high grade quartz shoots, hosted within these shears. Proportions of these shoots remain as high grade pillars and are recovered via open pit mining at Globe. The main focus of the Globe Open Pit however is the enveloping network of shearing which hosts refractory gold within sulphides.

The ore zone varies in thickness between 2 metres and 30 metres and exhibits extensive lateral and vertical continuity. A variety of ore textures are present. Typically a central core of quartz breccias (quartz shoots) is enveloped by black foliated clay rich rock, containing clasts of sheared greywacke, argillite, and quartz. A disseminated arsenopyrite and pyrite sulphide halo (refractory) surrounds the sheared core.

MiningThe ore is supplied from one open pit which sits along the mineralised shear zone. The mining operation consists of the Globe Progress Open Pit which includes the General Gordon ore body. The pit is mined in various stages. The haul roads are designed at a 1:9 gradient to reduce the mining footprint. The topsoil is removed from disturbed areas and stored for use during the rehabilitation of the mine.

The ore is drilled for grade control and blast holes on a 5.0 metre by 5.0 metre pattern using RC drilling techniques. Additional blast holes are drilled separately. The ore is then blasted to 9.0 metres and mined selectively in 3.0 metre flitches to reduce ore loss and dilution.

Total material movement (total ore mined plus total waste mined) has increased annually since commissioning in 2007 to 19.5 million tonnes in 2012, mainly from the Globe Progress Pit, but with smaller quantities from a satellite pit.

Operational Statistics

Reefton Goldfield 2012 2011 2010 2009 2008







Recovery (%) 80.6% 81.4% 82.5% 81.5% 81.8%

Mining Fleet

Type Quantity Gross Weight (tonnes)

Payload

Excavators 3 180 21 tonnes

Dump Trucks 13 250 93-144 tonnes

Water Trucks 2 30,000 L

Drills 2

Tracked Dozers 3

CAT Graders 2

Wheeled Dozers 1 70

Loaders 3 25 10 tonnes


Facts

Mine Type

Open Pit & UndergroundResources

2.51 (Moz Gold) 340,000 (tonnes Copper)

Reserves

1.69 (Moz Gold) 240,000 (tonnes Copper)

Estimated Mine Life (Based on current reserves)

2028

Gold Production (oz per annum):

100,000Copper Production (tonnes per annum):

14,000

Overview of the completed Didipio process plant with stockpiles in the foreground

Projected Key Operating Statistics (NI 43-101 Report, July 29, 2011)

Life of Mine 2013 2014 2015 2016 2017

Volumes

Total Material Mined Mt 207.8 20.1 23.1 22.4 23.6 23.2

Total Ore Mined Mt 52.9 8.6 5.8 4.1 5.8 2.4

Total Ore Milled Mt 52.9 2.5 3.1 3.5 3.5 3.5

Product sold

Gold in Doré Koz 436.4 21.5 26.3 28.7 27.5 29.1

Gold in Concentrate Koz 1,134.2 54.5 66.4 74.6 68.5 70.5

Copper in Concentrate Mlb 482.7 38.1 41.3 40.8 39.1 37.3

Concentrate (dry) sold Kt 888.7 72.0 78.0 77.1 73.9 70.5

Concentrate (wet) at mine gate Kt 987.5 80.0 86.6 85.6 82.1 78.3

22 Operations

Didipio Mine, Philippines

Underground– Sub-level open stoping with cemented paste backfill– Mines in parallel with the open pit– Decline commences in 2016 from side of open pit– Production to commence in 2019– Near full production in 2021, due to bottom up sequence– Base level 2,180mRL– Maximum mining rate 1.2Mtpa– Six year production life after development – Underground mining costs are forecast at US$34 per tonne

of ore mined

Processing Construction of a mineral processing facility to the north of the

open pit mine was completed on schedule in the fourth quarter of 2012. Ore is processed with a conventional SAG/Ball Mill grinding circuit followed by froth flotation for recovery of gold/copper concentrate. A gravity circuit is incorporated within the grinding circuit to produce gold bullion on site. Concentrate is transported by road to existing port facilities at San Fernando for export.

Initial throughput is planned for 2.5Mtpa building up to the nameplate capacity of 3.5Mtpa by the end of 2014. The plant was designed in a linear formation allowing for possible future expansion.

The Ball Mill Work Index is 14.6 kilowatt hours per tonne.

Approximately 50% of the average life of mine processing costs represents diesel power for the generators. OceanaGold will also review connectivity to grid power, however self generation is deemed necessary regardless, to ensure the reliability of power supply.

Processing costs are estimated to be US$13 per tonne milled (average over the next five years). Overheads and site costs include administrative costs associated with maintaining the site at Didipio, meals, accommodation, transport and community relations and are estimated at US$22- US$26 million (average over the next five years).

In 2012, the Company announced the signing of an Offtake Agreement with Trafigura in relation to the sale and purchase of copper concentrate from the Didipio Mine with a minimum period of five years from the start of production. OceanaGold sells 100% of the Didipio copper/gold concentrate production to Trafigura at competitive terms and conditions, including treatment and refining charges.

Trafigura is a leading international commodity trader that specialises in the supply and transport of concentrates, and owns and operates concentrate storage facilities in China and worldwide that support the company’s trading activity.

In June 2011, OceanaGold recommenced construction of the high grade gold copper Didipio Mine located in Luzon, approximately 270 kilometres north of Manila in the Philippines. Construction was completed and commissioning of the mine commenced on schedule in the fourth quarter of 2012 and commercial production is expected in the second quarter of 2013. Since recommencement of construction the total capital expenditure and working capital spend was approximately US$250 million.

Cash costs over the life of mine after copper by-product credits are expected to be significantly lower than OceanaGold’s New Zealand operations. When combined with current operations, the Didipio Mine will transform OceanaGold into a multinational gold producer and dramatically decrease the average cash cost across the business.

OceanaGold acquired the Didipio Mine through the merger with Climax Mining in November 2006 and a local partner is entitled to a free carried interest of 8% in the operating vehicle of the mine.

Ore Body Chalcopyrite (sulphide mineral of copper and iron) and gold are

the main economic minerals in the deposit. Chalcopyrite occurs as fine-grained disseminations, aggregates, fracture fillings and stock work veins, particularly within the vein zone of alteration. Some bornite (also a sulphide mineral of copper and iron) is also present.

The ore body contains a higher concentration of copper near surface and hence copper production in the early years is expected to be higher than the average life of mine production and lower in the later years.

A model of the ore body is available on the following website link: www.oceanagold.com/our-business/philippines/didipio-mine/

Mining

Open pit– Strip ratio 3.45:1– Five pit stages – 300 metres deep open cut down to an elevation of 2,380mRL– Conventional drill and blast– Double ramp access– Loading of haul trucks by hydraulic excavators– Open pit mining costs are forecast at US$2.60 per tonne mined

(average next five years)

Facts

Projected Key Operating Statistics (NI 43-101 Report, July 29, 2011)

Life of Mine 2013 2014 2015 2016 2017

Volumes

Total Material Mined Mt 207.8 20.1 23.1 22.4 23.6 23.2

Total Ore Mined Mt 52.9 8.6 5.8 4.1 5.8 2.4

Total Ore Milled Mt 52.9 2.5 3.1 3.5 3.5 3.5

Product sold

Gold in Doré Koz 436.4 21.5 26.3 28.7 27.5 29.1

Gold in Concentrate Koz 1,134.2 54.5 66.4 74.6 68.5 70.5

Copper in Concentrate Mlb 482.7 38.1 41.3 40.8 39.1 37.3

Concentrate (dry) sold Kt 888.7 72.0 78.0 77.1 73.9 70.5

Concentrate (wet) at mine gate Kt 987.5 80.0 86.6 85.6 82.1 78.3


May 2012: Construction well underway Jun 2012: Installation of SAG Mill Shell

Construction Path to

Commissioning & Commercial

Production

2013–––

Commercial Production

Sep 2012: Further progress on TSF

Dec 2012: Construction completedOct 2012: Conveyor belts progressing Nov 2012: Commissioning and milling starts

Aug 2012: Start of electrical worksJul 2012: Key equipment installed

Dec 2012: First concentrate produced Jan 2013: First concentrate trucked to port

24 Operations

Jun 2012: Installation of SAG Mill Shell

Sep 2012: Further progress on TSF

Didipio Phase IIFollowing commissioning of Didipio, OceanaGold plans to conduct a technical study in 2013 to optimise the value of the current resource.

The plant was designed in a linear formation allowing for future possible expansion and would require additional ball mills, flotation, power supplies and thickeners.

Financial or Technical Assistance Agreement (“FTAA”)The Didipio Mine is held under the FTAA between OceanaGold and the Philippines Government. The FTAA covers an area of approximately 158 square kilometres in the provinces of Nueva Vizcaya and Quirino.

In accordance with the FTAA agreement the Didipio Mine “Net Revenue” shall be shared on a 60/40 basis, of which 60% of the net will be the Government’s portion and 40% will be that of OceanaGold. The Company has a period of up to five years to recover its initial investment, only after which period shall the right of the Government to share in the “Net Revenue” accrue.

The initial investment includes not only the construction and development of the mine but also payments to claim owners and landowners, exploration programs, maintenance of exploration tenement, feasibility studies, administration of offices, financing costs and the net commissioning cost up to date of commencement of commercial production. It also includes payments made by predecessor companies.

The Contractor’s corporate tax, excise tax, royalties, free carried interest paid and other taxes paid shall be included in the 60% Government share. The Company has been granted a six year corporate tax holiday with a potential extension for a further two years.

FTAA Net Revenue

Net Revenue Calculation

Revenue

Less Operating costs

Less Depreciation of post development capital expenditure (excluding Underground development)

Less Underground mine development

= Net Revenue (Up to 5 years to recover the initial capital expenditure and commissioning costs from Net Revenue)

Government Share (= 60% Net Revenue post recovery of initial capital expenditure)

The following items shall be included in the Government Share:

2% Net Smelter Royalty paid

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

Corporate Tax (current tax rate 30%)

Other taxes (e.g. Withholding tax)

8% Free Carried paid (entitles the holder to 8% of equity in the operating vehicle and dividends to be paid once OGC recovers its initial investment)

Further details can be found in the NI 43-101 “Technical Report for the Didipio Project” dated July 29, 2011, available on the Company’s website.

Throughput

Gold Production Total Gold Equivalent Production

2013

E

2014

E

2015

E

Gol

d ‘0

00 o

z

0

50

100

150

200

250

Thro

ughp

ut M

tpa

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0


Exploration

During 2012, drilling of the Birthday Reef at Blackwater continued to produce favourable results returning gold intercepts of 0.5 metres @ 23.3 g/t from 1,315.9 metres (hole WA21A); 0.5 metres @ 15.65 g/t from 1,632.3 metres (hole WA22C); and 1.0 metre @ 85.2 g/t from 1,623.9 metres (hole WA22D). The final deep drill hole (WA25) commenced in the fourth quarter. Parent hole, WA25, intersected the reef at 1,190.77 metres down hole. Intercepts include: 0.45 metres (estimated true width of 0.35 metres) @ 31.80 g/t Au from 1,118.95 metres down hole; 0.41 metres (estimated true width of 0.30 metres) @ 62.40 g/t Au from 1,134.18 metres down hole and 0.59 metres (estimated true width of 0.50 metres) @ 3.91 g/t Au from 1,190.77 metres down hole. The daughter hole, WA25A, intersected the reef 5.0 metres distant from the parent hole. Intercepts include: 0.71 metres (estimated true width of 0.50 metres) @ 134.00 g/t Au from 1,136.40 metres down hole and 0.45 metres (estimated true width of 0.40 metres) @ 61.90 g/t Au from 1,195.20 metres down hole.

WA25 has demonstrated strike continuity at depth and has led to an updated resource estimate. The Blackwater Project Inferred resource has increased by 0.25 Moz to 0.9 Mt @ 21 g/t Au for 0.6 Moz of gold.

A prefeasibility study has commenced which will expand on previous conceptual mining scenarios and include a mining method options study targeting a production rate of 50,000 to 60,000 ounces of gold per annum.

PhilippinesExploration in the Philippines focused on delineating potential copper and gold drill targets within the Financial or Technical Assistance Agreement (FTAA) area and adjacent OceanaGold controlled explorations permits.

In 2012, exploration was focused on preparation for scout drilling at Mogambos, and D’Beau, review of the San Pedro near-mine prospect, discovery of anomalous gold at the Dilaping prospect and discovery of porphyry-style copper-gold mineralisation at the Cabinwangan prospect. Several of the targets are now ready for drilling pending renewal of the FTAA exploration period and granting of adjacent tenement applications.

At the near-mine prospects of D’Beau and Mogambos drill pads for the initial scout drilling programme have been prepared. Drilling at D’Beau will target potential continuity at depth of the mineralised monzonite dykes exposed near surface while drilling at Mogambos will test the coincident gold copper anomalies in soil.

In 2013, additional exploration activity will focus on identification of potential drill targets at the San Pedro, Dilaping and Cabinwangan prospects. Drill targets have been identified at the Papaya prospect with five drill holes planned to test geochemical anomalies and mineralised structures. Drill pad preparation is scheduled for 2013.

OceanaGold’s exploration strategy is focused on discovery that has potential to extend the mine life at its operations.

In 2012, the Company invested US$14.9 million with the majority incurred in New Zealand and plans to invest US$5 – US$10 million in exploration in 2013 in New Zealand and up to US$12 million in the Philippines.

New Zealand

MacraesThe Macraes exploration permits cover 35 kilometres of strike length of the mineralised Hydes-Macraes shear zone. At Macraes surface resource development drilling program consists of 110 holes comprising 9,734 metres of RC drilling and 1,350 metres of diamond drilling. The resource development drilling is currently underway at the Coronation deposit and will be followed by drilling of Deepdell and Innes Mills deposits. Drilling is targeting improving the geological confidence and size of the identified resources for each deposit. Following completion of the drilling on each deposit the resource estimates will be updated.

The Frasers Underground step out drilling from the exploration drive continued to be successful in intersecting mineralisation down dip to the north and north-east of underground workings and the deposit remains open in both directions. In 2012, the rise drilling, including the underground exploration and resource infill drilling program completed 75 diamond drill holes for 16,735 metres. The drilling program from the existing exploration drive is now complete. In the second half of 2013, a new exploration drive is planned to commence to enable resource definition drilling to continue in the down dip areas of Panel 2 and provide the drilling platform for exploration drilling to the north and north east in 2014 and 2015.

ReeftonAt Reefton, exploration during 2012 was focused on greenfields and brownfields drilling with 77 holes completed for 17,060 metres mainly at the historic Blackwater Mine and at the Globe Progress Pit.

In 2012, the 21 hole drill program targeting down dip extensions to the Globe Progress structure beneath the pit design was completed and a resource update compiled. This resulted in a Measured & Indicated Resource increase over and above 2012 mining depletion of 36,000 ounces.

The historic Blackwater Mine, located 15 kilometres from the Reefton process plant produced 740,000 ounces of gold at an average grade of 14.6 g/t until the mine shaft closed in 1951. OceanaGold acquired the Blackwater Mine in 1997 along with detailed information of historic mining.

In late 2011, a deep-drilling program commenced at Blackwater intended to test continuity of mineralisation below the level of the historic workings. The drilling program was oriented to defining an inferred resource of around 500,000 ounces.

26 Operations

Mineral Reserves

Reserves & Resources

As OceanaGold’s main listing is on the Toronto Stock Exchange, the Company adopts the Canadian Institute of Mining NI 43-101 listing requirement of publishing its resource inventory.

As at 31 December 2012, OceanaGold had a total Measured and Indicated Mineral Resources of 6.73 million ounces of gold and 290,000 tonnes of copper. This includes Mineral Reserves of 3.64 million ounces of gold and 240,000 tonnes of copper. The tables below summarise the Company’s Mineral Resource and Mineral Reserve inventories as at 31 December 2012. The Mineral Resources stated include the Mineral Reserves.

0.00

1.00

2.00

3.00

4.00

5.00

6.00

Dec

200

8

Gol

d an

d G

old

Equi

vale

nt (

Moz

)

Dec

200

9

Dec

201

0

Dec

201

1

Dec

201

2

Gold Equivalent (Moz)

Gold (Moz)

Mineral Resource Statement as at December 31, 2012 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 28.7 1.38 1.27 73.1 1.12 2.64 101.8 1.19 3.90 51.2 1.2 1.9

Reefton Total 1.7 1.90 0.11 12.4 1.51 0.60 14.2 1.56 0.71 4.8 3.3 0.5

Sams Creek Total

11.0 1.7 0.6

Didipio Total 17.1 1.59 0.87 0.57 0.10 50.5 0.76 1.24 0.37 0.19 67.6 0.97 2.11 0.42 0.29 26.0 0.5 0.4 0.2 0.05

Total Resource 47.5 1.47 2.25 0.10 136.0 1.02 4.48 0.19 183.5 1.14 6.73 0.29 93.1 1.1 3.4 0.05

The Macraes and Reefton Mineral Resource figures were updated since the Macraes and Reefton Technical Reports due to depletion and drilling and were released by the Company on March 25, 2013. The total inferred resource at Sams Creek stand at 18.4 Mt @ 1.7g/t Au for 1.0 Moz gold, of which OceanaGold owns a 60% interest.

Mineral Reserves Statement as at December 31, 2012Reserve Proven Probable Proven & 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 20.0 1.18 0.76 25.9 1.07 0.89 45.9 1.12 1.65

Reefton 1.1 1.87 0.07 4.8 1.50 0.23 5.9 1.57 0.30

Didipio 15.0 1.50 0.73 0.60 0.09 35.1 0.86 0.97 0.42 0.15 50.1 1.05 1.69 0.47 0.24

Total 36.1 1.34 1.55 0.09 65.8 0.99 2.09 0.15 101.9 1.11 3.64 0.24

The Macraes and Reefton Mineral Reserve figures were updated since the Macraes and Reefton Technical Reports due to depletion and were released by the Company on March 25, 2013. All resources are inclusive of reserves. Macraes and Reefton Open Pit resources are reported at a 0.5 g/t Au cut-off, and Sams Creek resources at a 0.7 g/t Au cut-off. Underground resources are reported within geological constraints. For Didipio: 0.4 g/t EqAu >2,390mRL and 1.5 g/t EqAu <2,390mRL. No resource is reported below 2,180mRL. EqAu is gold equivalence based on US$1,250/oz gold and US$3.25/lb copper.


Sustainability

2012 Highlights– Awarded plaque of recognition from the regional office of the

Philippines Human Rights Commission for “incorporating and observing a human rights perspective in the conduct of its business affairs and for giving due consideration to cultural rights as well as the social development of the Barangays impacted by its mining operations within the Provinces of Nueva Vizcaya and Quirino”.

– Peak construction workforce at Didipio was 1,700 workers of which, 98% were Filipinos and 100% Philippine contractors.

– Decreased Didipio LTIFR from 1.55 in 2011 to 0.66 in 2012.– Continued reforestation of the Philippines – 320 hectares

reforested since 2007.– Awarded DiCorp (Didipio Community Development Corporation)

with several mines services contracts such as camp catering and concentrate handling and loading.

– Over 70% of New Zealand expenditures were sourced from local suppliers.

– Developed the OceanaGold Health, Safety and Environment Compliance Standards manual that was rolled out across the operations.

Further details on sustainability and community relations can be found in OceanaGold’s ‘Sustainability Report’ available on the Company’s website.

The Company is in a period of growth and transformation with the addition of Didipio to the portfolio of operating assets. This growth brings with it the opportunity to further improve and deepen our commitment to sustainable development across all operations and business units. A key step in this process has been the development of an overarching sustainable development vision. Our vision explains what we are striving for and what sustainability means to us.

The Company’s vision captures the key principles on which our commitment to sustainability is based and highlights our focus to deliver meaningful benefits that endure long after our operations are complete. Our vision guides how our projects and programs are undertaken and evaluated. It keeps us focused on operating in a way that protects and supports social integrity, health and safety, environmental factors and equitable economic development.

Having a long, rich history of socially responsible operations in New Zealand, we bring this know-how and experience of working with our communities and sound environmental practice to the Philippines. There is no greater example of this than the completion of construction of Didipio Mine at the end of 2012 and subsequent ramp-up to operations. We would not have been able to achieve this without having the support of our communities, local governments and our other valued stakeholders.

Our stakeholders’ participation in our activities and satisfaction with what we do is the cornerstone of our success to date and exists as a strong platform of support from which to grow.

OceanaGold Education Scholar Recipient, Philippines

28 Operations

Sustainability Performance

2012 Target Status Commentary

Environmental Performance

New Zealand Coordinate the transition to the Macraes Phase III (MPIII) consents to ensure the timely submission and approval of new management plans and operational manuals.

Completed the transition to Macraes Phase III (MPIII) consents.

Manage environmental impacts to maintain the number of ‘moderate’ or ‘major’ environmental incidents (i.e. Levels 3 to 5) at zero.

No Level 3-5 environmental incidents during the reporting period. On-going management to maintain this performance.

Implement an Environmental Management System to ensure continual environmental improvement at Reefton.

Commenced the implementation of an Environmental Management System including a gap analysis against ISO 14001.

Philippines Complete 75% of the requirements to obtain ISO 14001 certification.

Completed 75% of the requirements to obtain ISO 14001 certification at Didipio as the majority of documentation and training completed.

Reforest 100 hectares under OceanaGold’s commitment to the Philippine National Greening Program.

Reforested 100 hectares in the Philippines as part of our Community Partnership Plantation Program.

Achieve 100% compliance with all the environment provisions within Didipio’s environmental permits.

Achieved 100% compliance.

Community Performance

New Zealand Complete an archaeological survey of the Macraes Township in consultation with the Macraes Community Incorporated Members.

Survey work undertaken and report received in January 2013.

Aim for zero complaints in 2012. Where this is not achieved, ensure complaints are resolved in a timely fashion.

No complaints received.

Philippines Sustain partnerships with host and adjacent communities.

Completed as demonstrated through the Memorandum of Understanding Agreement (MoA) with nine adjacent Barangays.

Complete five year Community Development Plan covering the host and nine adjacent Barangays.

Five year (2012-2016) Community Development Plan was completed with all 10 communities.

Implement a community grievance management program.

Implemented a community grievance management program in the Philippines and appointed a full time Grievance Coordinator.

Support sustainable enterprise development in the community by awarding at least three long term service contracts to a local community owned corporation valued at US$1 million per year in aggregate.

Major long term projects awarded to DiCorp include access road maintenance, camp housekeeping and maintenance, shuttle service and catering services and Didipio concentrate handling and storage.

Health and Safety Performance

New Zealand Complete a Safety Management Systems (SMS) audit process across New Zealand sites.

An OceanaGold Corporate SMS audit template was developed and internal audits conducted across Macraes, Reefton and NZ Exploration. Macraes Operations SMS was also audited by an external party (Ministry of Business, Innovation and Employment).

Continue random drug and alcohol testing across all sites.

Causal and random testing as well as group/blanket tests has been undertaken. 3,500 alcohol and 1,500 drug tests at Reefton.

Achieve Long Term Injury rate lower than the Australian mining industry average.

Slightly higher than the Australian average at 4.53. Each incident investigated and corrective and preventative actions implemented.

Philippines Total Recordable Injury Rate to be <9. The total recordable injury rate was 4.57.

Behavioural Based Workplace Observations to be >100. Nearly 1,750 safety observations were made.

Implement 50 Safe Work Procedures. Implemented over 470 Safe Work Procedures.

Achieved Not AchievedPartially Achieved


Frasers Underground, New Zealand

Focused on profitability

Financials and Investor Information

31

Five Year Financial Summary

Statement of Operations US$ Year Ended 31 December

2012 $’000

2011 $’000

2010 $’000

2009 $’000

2008 $’000

Gold sales 385,448 395,609 305,638 237,057 217,214

Cost of sales, excluding depreciation and amortisation (226,039) (216,789) (150,697) (121,310) (138,154)

General & administration (14,911) (14,537) (13,805) (9,179) (15,388)

Foreign currency exchange gain/(loss) (961) 320 (961) (24) 2,254

Other income/(expense) 1,095 (680) (660) (366) 133

EBITDA (excluding gain/(loss) on undesignated hedges) 144,632 163,923 139,515 106,178 66,109

Depreciation and amortisation (91,376) (85,822) (69,337) (66,181) (50,547)

Net interest expense and finance costs (21,510) (12,909) (14,780) (14,389) (18,056)

Earnings/(loss) before income tax and gain/(loss) on undesignated hedges

31,746 65,192 55,398 25,608 (2,494)

Tax (expense) on earnings/loss (11,426) (21,025) (22,638) (11,865) (1,051)

Earnings/(loss) after income tax and before gain/(loss) on undesignated hedges

20,320 44,167 32,760 13,743 (3,545)

Release from reserve of deferred unrealised gain/(loss) on designated hedges

- - - - 279

Gain/(loss) on fair value of undesignated hedges 503 - 16,215 58,241 (73,408)

Tax on (gain)/loss on undesignated hedges (151) - (4,540) (17,472) 21,939

Net profit/(loss) 20,672 44,167 44,435 54,512 (54,735)

Net Earnings Per Share US$

Basic earnings per share $0.08 $0.17 $0.20 $0.32 ($0.34)

Diluted earnings per share $0.08 $0.17 $0.20 $0.29 ($0.34)

Weighted average no. of shares for diluted EPS (‘000) 296,250 307,023 270,999 214,192 161,635

Cash Flows

Cash flows from Operating Activities 115,253 154,555 52,260 94,183 47,725

Cash flows from Investing Activities (294,548) (146,595) (107,809) (71,013) (108,316)

Cash flows from Financing Activities 108,919 (16,110) 186,798 2,933 (49,134)

Balance Sheet as at 31 December 2012 IFRS

2011 IFRS

2010 IFRS

2009 IFRS

2008 GAAP

Cash and Cash Equivalents 96,502 169,989 181,328 42,423 9,711

Other Current Assets 89,276 56,491 47,320 30,032 35,980

Non Current Assets 845,878 591,155 477,568 433,541 584,299

Total Assets 1,031,656 817,635 706,216 505,996 629,990

Current Liabilities 199,413 123,623 63,091 185,061 89,105

Non Current Liabilities 222,383 215,772 209,984 138,656 294,229

Total Liabilities 421,796 339,395 273,075 323,717 383,334

Total Shareholders’ Equity 609,860 478,240 433,141 182,279 246,656

OceanaGold’s financial year end is 31 December and the Company’s financial information is presented in United States dollars (“US$”), unless otherwise stated.


Operating Costs

OceanaGold’s operating cash cost per ounce of gold sold are expected to decrease significantly when compared to the prior year with the commencement of commercial production at the Didipio Mine in 2013. Cash costs for the Didipio Mine are initially forecast to be less than US$0 per ounce of gold sold in 2013, net of copper by-product credits at US$3.40 per pound of copper. During the commissioning period, operating costs net of revenue received at the Didipio Mine are capitalised to the balance sheet and amortised against future production in the profit and loss statement.

In 2012, approximately 60% of the operating costs incurred in New Zealand related to, labour, diesel and maintenance, of which a large proportion is fixed (hence cash cost per ounce sold decreases with increased gold ounces sold).

As OceanaGold reports its financial results in United States Dollars (“USD”), the foreign exchange rate used for translation may have a material impact on the reported costs. Cash spent on pre-stripping is capitalised in the balance sheet and amortised against future production in the profit and loss statement.

RoyaltiesIn New Zealand (for Macraes and Reefton), royalties to a maximum of 1% ad valorem or 5% of accounting profits, whichever is greater, are payable to the Crown annually. Most of the Reefton Project tenements are also subject to an agreement with Royalco Resources Limited (“Royalco”).

The Globe Progress Open Pit component of the Reefton Mine pays a royalty based on the NZD gold price until 400,000 ounces has been produced from this tenement. During the third quarter of 2012, Reefton achieved this production benchmark and therefore 2013 royalties for the New Zealand operations are expected to be lower.

Other areas in the Reefton Goldfield outside of this tenement are subject to a variable royalty of between 1% and 3% annual gold production, however based on current forecast mining areas, this is not applicable.

In 2012, royalties represented approximately 2% to 3% of gold sales and are included in the reported cash cost amount.

In the Philippines, the local claim owner syndicate is entitled to a 2% net smelter return (NSR) royalty on production. An additional royalty of 0.6% of 92% NSR (capped at a total of A$13.5 million) is payable to a third party.

Quick Facts

2012 Cash Cost Split of New Zealand Operations (NZD)

New Zealand– Approximately 65-70% of the

New Zealand operations cash costs are denominated in New Zealand Dollars (“NZD”).

– OceanaGold consumes approximately 3.5 million litres of diesel per month in New Zealand.

– Electricity is sourced from the electricity transmission network grid of which ~70% is derived from renewable (mainly hydro, also geothermal and wind) sources and ~50%-65% of power is hedged. Power prices excluding line and network charges average approximately NZD5-10c per kilowatt hour.

– Annual power consumption is ~245 million kwH per annum.

Philippines– Electricity is sourced from diesel

powered generators and represents ~50% of processing costs.

– Cash costs per ounce of gold sold are net of copper by-product credits.

– OceanaGold will be the first company to operate under the FTAA in the Philippines.

1 Employees and other labour costs 28% 2 Diesel 16% 3 Maintenance 15% 4 Consumables 14% 5 Contractors 10% 6 Electricity 8% 7 Royalities 5% 8 Other 4%

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Capital Expenditure

LiquidityIn August 2012, OceanaGold announced the signing of US$225 million term and revolving credit facilities with a multinational banking syndicate. The funds have been used to repay the convertible notes which matured in December 2012, working capital purposes and if required for repayment of the convertible notes maturing in December 2013. The facilities have common terms and conditions and mature on 30 June 2015. Interest on these facilities is based on floating US$ LIBOR plus a margin. As at 31 December 2012, available undrawn facilities were US$122 million and cash on hand was US$97 million.

An additional US$25 million Convertible Revolving Credit facility was entered into whereby the Company has the option to repay any drawn down funds with the issuance of ordinary shares subject to ASX listing rules. As at 31 December 2012, this facility was undrawn.

In 2012, OceanaGold invested US$295 million on capital expenditure (“capex”) which included US$182 million on the Didipio Mine construction and commissioning costs, US$15 million on exploration and the balance mainly attributable to expenditure in New Zealand.

In New Zealand, capex consists of sustaining and rehabilitation, and pre-stripping expenditure (which has generally been over 50% of the total New Zealand spend) and is approximately US$70 million to US$95 million per annum. In 2013, capex for New Zealand is forecast to be in the higher end of this range due to construction of a new tailings storage facility and an upgrade to the gold room at Macraes.

In the Philippines, maintenance capex for the Didipio Mine is forecast at US$10 million to US$15 million per annum average over the life of the mine. In 2013, approximately US$20 million capex is planned for additional infrastructure such as workshops, high level crossings and employee facilities. Additional lifts for the tailings storage facility will require approximately US$10 million per annum for the next 4 or 5 years.

Summary terms of convertible notes

7.00% Dec ‘13 7.00% Dec ‘13

Issue date 22 December 2006 22 March 2007

Type Unsecured Unsecured

Principal A$70 million A$30 million

Coupon 7.00% p/a 7.00% p/a

Frequency Semi annual in arrears

Semi annual in arrears

Number of notes 700 300

Redemption A$77.9 million A$32.8 million

Conversion right Note holder Note holder

Conversion price* A$3.8401 A$4.0327

Maturity Date 22 December 2013 22 December 2013

* Conversion determined by dividing principal amount by conversion price subject to adjustment for certain specified events

Mining activity at Didipio, Philippines.


Share Information

Distribution of ShareholdingsSince listing in on the Toronto stock exchange in 2007, OceanaGold has developed a broad international base of shareholders. Institutional shareholding represents over 74% of issued shares.

OceanaGold is listed on the Toronto, Australian and New Zealand stock exchanges under code “OGC”. As the Company’s primary listing is in Toronto, the Company is governed by the requirements of the Toronto Stock Exchange listing rules. OGC shares are fully fungible between the three exchanges.

Share Price PerformanceOceanaGold’s market capitalisation as at 31 March 2013 was US$860 million.

In 2012, OceanaGold was one of the top share price performers when compared to its peer group and important benchmark indices with a return of 27%. The gold price appreciated by 7% whilst the Market Vectors Junior Gold Miners ETF resulted in a negative 17% total return over the same period. During 2012, the average daily trading volume was approximately 2.3 million shares across all three exchanges combined.

Analyst Coverage:OceanaGold is currently covered by 14 brokers in Canada, Australia and New Zealand who regularly publish reports on the Company. Details of the analyst coverage can be found on the Company’s website.

OceanaGold’s longer term relative share price performance against the spot gold price and Market Vectors Junior Gold Index

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OGC GDXJ Market Vectors Junior Gold Miners IndexGold Spot US$

Shareholders by Region December 2012

1 Australia & New Zealand 34%

2 North America 43% 3 Asia 2% 4 ROW 1% 5 Europe (incl UK) 20%

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5


James E. Askew

Mark Chamberlain

Michael F. Wilkes

Mark Cadzow

J. Denham Shale

Michael Holmes

Jose P. Leviste, Jr.

Dr Michael Roache Liang Tang

Jacob Klein

Darren Klinck

William H. Myckatyn

Yuwen Ma

Dr Geoffrey W. Raby

Our Team


Board of Directors

James (Jim) E. Askew Chairman of the Board of Directors (appointed March 2007)

– Mining engineer with over 35 years experience

– Director and/or Chief Executive Officer for a wide range of Australian and international publicly listed mining, mining finance and other mining related companies

– Current board memberships: Ivanhoe Mines, Evolution Mining Ltd, Asian Mineral Resources Ltd and PMI Gold Corporation

Michael (Mick) F. Wilkes Managing Director and Chief Executive Officer (appointed April 2011)

– Mining engineer with approximately 30 years industry experience with precious and base metals

– Developed major projects in Australia and SE Asia including OZ Mineral’s Prominent Hill copper gold project and Sepon gold copper project for Oxiana in Laos

– Previously held senior mining roles in Papua New Guinea

J. Denham Shale Lead Director (appointed March 2007)

– Lawyer in practice in Auckland– Director of listed companies for

over 25 years and President and an Accredited Fellow of the Institute of Directors in New Zealand Inc.

– Currently Chairman of Dunedin City Holdings Limited and a director of New Zealand listed Turners Auctions Limited and several private companies

Jose (Joey) P. Leviste, Jr. Non Executive Director (appointed December 2007)

– Current Chairman of OceanaGold’s wholly-owned subsidiary company in the Philippines, OceanaGold (Philippines), Inc

– Philippine Resident Representative of the Australia-Philippine Business Council

– Appointed by President of the Philippines as private sector member of Governing Council of the Philippine Council for Agriculture, Aquatic and Natural Resource

Jacob Klein Non Executive Director (appointed December 2009)

– Executive Chairman of Evolution Mining Limited and a Non Executive director of Lynas Corporation

– Former President and CEO of Sino Gold Limited, a company he helped found in 2000

– Past president of the NSW Branch of the Australia China Business Council

William (Bill) H. Myckatyn Non Executive Director (appointed April 2010)

– Professional mining engineer with over 40 years experience in mine development and operations

– Former Chairman of Quadra FNX Mining Ltd., until its takeover in 2012, an intermediate copper and gold producer and a company he co-founded as CEO in 2002

– Currently on the Board of Directors for Pacific Rim Mining, First Point Minerals, San Marco Resources and Delta Gold Inc.

Dr Geoffrey W. Raby Non Executive Director (appointed August 2011)

– Formerly Australia’s Ambassador to the People’s Republic of China from 2007 to 2011

– Previously a Deputy Secretary in the Department of Foreign Affairs and Trade

– Chairman of SmartTrans Holdings Ltd and non executive director of Fortescue Metals, both ASX listed companies

Management

Mark Chamberlain Chief Financial Officer

– >30 years financial experience– Capital markets and financial and risk

management expertise– 20 years industry experience including

senior finance roles at Newcrest Mining and Western Mining Corporation

Mark Cadzow Chief Development Officer

– Metallurgist with >30 years industry experience in mineral processing, precious metals, and sulphide minerals

– Involved in development of patented processes for the recovery of gold and other minerals

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

Michael Holmes Chief Operating Officer

– Mining engineer with over 25 years experience

– Broad operational experience in underground and open pit gold, copper and other metals

– Industry experience includes General Manager roles at Xstrata Copper Minera Alumbrera in Argentina and Mount Isa Copper Operations in Australia

Darren Klinck Head of Business Development

– International capital markets experience in metals and mining

– Appointed VP Investor Relations in 2007 and current role in 2011

– Responsible for identifying and evaluating external growth opportunities and capital markets interface

Yuwen Ma Head of Human Resources

– 20 years Human Resources experience– Industry experience includes Eldorado

Gold and Sino Gold Mining Ltd– Significant Asian experience with

multinational corporations

Dr Michael Roache Head of Exploration

– 23 years SE Asian experience– Focus on gold exploration and discovery– Strong experience in gold deposit styles

and porphyries

Liang Tang Company Secretary and Corporate Counsel

– Practising lawyer with broad range of legal and corporate experience in the gold mining sector

– Responsible for legal affairs, compliance and corporate governance

– Holds Bachelor of Commerce and Bachelor of Laws


Agitator: Mechanical stirrer or shaker

Alluvium: Sedimentary material associated with river deposition

Assay: Chemical analysis on a sample to determine the concentration of valuable metals

Au: Chemical symbol for gold

Autoclave: Pressure vessel used to treat refractory ore

ASX: Australian Stock Exchange

Backfill: Waste material used to fill voids or pits created by mining

Ball Mill: Steel cylinder filled with steel balls into which crushed ore is fed. The ball mill is rotated, causing the balls to cascade and grind the ore

Barangay: Administration division of Philippines, a village, district or ward

By-product credit: Accounting treatment to record proceeds from sales of other commodities against cost of goods sold rather than revenue

Bullion: Metal formed into bars or ingots

Breccia: Intensely fractured rock resulting in a finely pulverised matrix supporting larger remnant rock fragments

Cash Cost: Cost of production per unit sold, typically excluding capital expenditure. Costs include; mining, processing, transport, royalties and related administration

Cash Operating Margin: Average gold price received less average cash cost per ounce of gold sold

CDI: “CHESS Depository Interests” are shares held by non-registered shareholders in Australia, units of beneficial ownership on the underlying common shares which are registered in the name of CDN

CDN: “CHESS Depository Nominees” clearing agency in Australia

Carbon in Leach: Method of gold recovery where activated carbon is used to retrieve gold from the leach solution

Chalcopyrite: Sulphide mineral of copper and iron

Copper: Ductile, easily worked metal, a very good conductor of heat and electricity and is used especially for electrical wiring

Cu: Chemical symbol for copper

Diamond drilling: Diamond-studded drill bits are used to recover intact cylindrical cores of rock, allowing detailed examination of the rock type as well the orientations of geological structures

DCDAI: Didipio Community Development Association Inc (Philippines)

Decline: Ramp entry into underground mine

DENR: Department of Environment and Natural Resources (Philippines)

Deposit: Rock containing minerals or metals through natural processes

Doré: Final saleable product from a gold mine mainly gold and some silver, ready for further refinement

Drilling: Refer to “Reverse Circulation” and ‘Diamond Drilling”

EBITDA: Earnings Before Interest, Tax, Depreciation and Amortisation

Flotation: Milling process using reagents in which valuable metal attaches to the bubbles and floats as the waste sinks

FTAA: Financial or Technical Assistance Agreement (Minerals agreement entered into with Philippine Government)

GAAP: Generally Accepted Accounting Practices

Geochemistry: Study of the chemical properties of rocks

Geology: Study of the Earth and materials of which it is made (rocks)

Geophysics: Study of physical properties of rock and minerals

Gold: Dense, soft, shiny, malleable and ductile metal

Gold Price: Spot gold per troy ounce quoted in USD

Grade: Concentration of valuable mineral in a body of rock, normally expressed as grams per tonne or a percentage

g/t: Grams per tonne (32.103 grams = 1 troy ounce)

Hedge: A transaction entered into to offset the adverse price movements of an asset

ICAM: Incident Cause Analysis Method

IFRS: International Financial Reporting Standards

Jaw crusher: Machine for crushing rock or ore between two heavy steel jaws

JORC: Joint Ore Reserves Committee (Australian and New Zealand standard) of the AusIMM

Kasibu: Municipality of the Nueva Vizcaya province in the Philippines

Life of Mine: The time in which the ore reserves, or such reasonable extension of the ore reserves as conservative geological analysis may justify, will be extracted

Luzon: The largest island of the Philippines and includes the capital of Manila

MGB: Mines & Geosciences Bureau (Philippines)

Mill Feed: Amount of ore in tonnage processed

NI 43-101: National Instrument Standards of Disclosure of Mineral Projects (Canadian Institute of Mining)

Net Smelter Return (NSR): Gross income from the sale of copper and gold less treatment charges, refining charges, metal losses, sea freight, marketing and insurance costs

NZX: New Zealand Stock Exchange

Open pit mining: A mine on the surface (also known as open cast and open cut)

Ore: Naturally occurring mineral or rock from which a valuable mineral or metal can be extracted at a profit

Ore body: Continuous mass or close grouping of masses of ore

Ore grade: Concentration of metal or valuable mineral in the ore deposit

Outcrop: Rock exposure at surface

Oxidation: Chemical reaction from the interaction with oxygen

PEA: Preliminary Economic Assessment

Placer mining: Extraction of minerals using water and gravity

Porphyry: Igneous rock consisting of large crystals dispersed in a fine-grade groundmass

Pre-Strip: Removal of waste rock overlying an ore body in preparation of open pit mining

Recovery: Percentage gold recovered from mill feed

Refractory ore: Ore that requires additional processing, such as intensive particle size reduction or chemical treatment to liberate the commodity of interest

Reserves: Mineral resources that are economically and technically feasible to extract

Resources: A concentration or occurrence of minerals for which there are reasonable prospects for eventual economic extraction

Reverse Circulation (“RC”) drilling: RC drilling breaks up the rock into fragments. Water or other fluid mixtures flush the fragments to surface for sampling

ROM: Run of Mine

SAG Mill: Semi-autogenous grinding employs coarse ore as the grinding medium in addition to steel balls to maintain the grinding rate

SEDAR: Provides access to most public securities documents and information filed by public companies and investment funds with the Canadian Securities Administrators (CSA) in the SEDAR filing system

Shear zone: A zone of intensely deformed rocks

Scheelite: Calcium tungsten mineral

Shaft: Entry into underground mine with vertical excavations sunk adjacent to an ore body

Strike: The direction of the line of intersection of a plane (e.g. foliation, bedding or vein) with the horizontal plane. The strike of a bed is the direction of a straight line that connects two points of equal elevation on the bed

Strip Ratio: Ratio of waste material to tonnes of ore in an open pit mine

Tailings: Rejected material from the process mill after most of the recoverable valuable minerals have been extracted

Throughput: Amount of ore processed through the mill

Troy Ounce: used to weigh and price the mass of precious metal, and is not the same as an imperial ounce

TSX: Toronto Stock Exchange

Vein: A mineral-filled rock fracture

Waste rock: Rock which does not contain valuable minerals or metals

Glossary


Corporate DirectoryKey Investor Dates

17 May 2013: Annual General Meeting

25 July 2013: Second quarter and Half Year 2013 Financial Results released

30 October 2013: Third quarter 2013 Financial Results released

End January 2014: 2013 Fourth quarter production update

20 February 2014: Fourth quarter and Full Year 2013 Financial Results released

29 April 2014: First Quarter 2013 Financial Results released

Note: Dates are subject to change. Refer to www.oceanagold.com for the latest updates.

OceanaGold CorporationCorporate OfficeLevel 5, 250 Collins StreetMelbourne, Victoria, 3000Australia

PO Box 355,Flinders Lane Post OfficeMelbourne, Victoria, 3000Australia

T: +61 3 9656 5300F: +61 3 9656 5333E: [email protected]

Canadian OfficeFirst Canadian Place100 King Street WestSuite 5700Toronto, Ontario, M5X IC7Canada

DirectorsJames E. Askew (Chairman)Michael F. Wilkes (MD& CEO)J. Denham ShaleJose P. Leviste, Jr.Jacob KleinWilliam H. MyckatynDr Geoffrey W. Raby

Company SecretaryLiang Tang

Websitewww.oceanagold.com

Investor RelationsT: +61 3 9656 5300 (Australia)T: +1 416 915 3123 (Canada)E: [email protected]

Share RegistriesCanadaComputershare Investor Services3rd Floor, 510 Burrard StreetVancouver, British Columbia V6C 3B9CanadaT: +1 604 661 9400F: +1 604 669 1548

AustraliaComputershare InvestorServices Pty Ltd452 Johnston StreetAbbotsford, Victoria, 3067AustraliaT: +61 3 9415 4000F: +61 3 9473 2500

New ZealandComputershare InvestorServices LimitedLevel 2, 159 Hurstmere RoadTakapuna, North Shore City, 0622New ZealandT: +64 9 488 8700F: +64 9 488 8787

Stock ExchangesCanadaToronto Stock Exchange3rd Floor, 130 King Street W.Toronto, Ontario M5X 1J2CanadaTicker symbol: OGC

AustraliaAustralian Stock Exchange LimitedLevel 4, Stock Exchange Centre20 Bridge Street, SydneyNew South Wales, 2000AustraliaTicker symbol: OGC

New ZealandNZX LimitedLevel 2, NZX Centre11 Cable Street, WellingtonNew Zealand

AuditorsPricewaterhouseCoopersFreshwater Place2 Southbank BoulevardSouthbank, Victoria, 3006AustraliaT: +61 3 8603 1000F: +61 3 8603 1999


OceanaGold Corporation Corporate Office Level 5, 250 Collins Street Melbourne, Victoria, 3000 Australia

PO Box 355, Flinders Lane Post Office Melbourne, Victoria, 3000 Australia

T: +61 3 9656 5300 F: +61 3 9656 5333 E: [email protected] www.oceanagold.com

Documents

OceanaGold Fact Book 2013 · 2019-12-19 · 2010 Buyback of gold hedge book. Macraes three millionth ounce of gold poured. 2011 Didipio Mine construction recommenced in June. Record