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Oceanagold Reports Growing High-Grade Resources at Wkp IN New Zealand

Corporate Updates

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MEDIA RELEASE

24 February 2020

OCEANAGOLD REPORTS GROWING HIGH-GRADE RESOURCES AT WKP IN NEW

ZEALAND

(MELBOURNE) OceanaGold Corporation (TSX: OGC) (ASX: OGC) (the “Company”) is pleased to announce

updated high-grade mineral resources at its WKP (Wharekirauponga) prospect, located ten kilometres north

of the Waihi Gold Mine in New Zealand.

Highlights

 Indicated Resources increase 80% to 1.0 million tonnes grading 13.4 g/t gold for 421,000 ounces

and 25.5 g/t silver for 803,000 ounces on the East Graben vein.

 Inferred Resources increase 79% to 1.9 million tonnes grading 12 g/t gold for 717,000 ounces and

20 g/t silver for 1,230,000 ounces from the East Graben zone and T-Stream vein.

Mick Wilkes, President and CEO of OceanaGold said, “The high-grade WKP resource continues to grow,

which further demonstrates the solid organic growth potential of our business particularly in New Zealand, a

top-tier jurisdiction. WKP is a game-changing opportunity for our business, for our shareholders and for New

Zealand. OceanaGold has a long history of operating to the highest environmental and social standards for

the past 30 years and we have demonstrated our ability as a responsible mining company to not only advance

opportunities through to production but also rehabilitate and close operations in collaboration with our

stakeholders.”

“For the past year, we have been focused on resource definition drilling on the East Graben vein and

associated footwall veins where significant high-grade intercepts were reported in November 2019. The East

Graben vein zone, including the proximal high-grade footwall veins, has demonstrated a strike length of at

least 1,000 metres that is open in both directions along strike with a defined 200-metre vertical extent and

additional up and down dip potential.”

“The WKP opportunity is another key component of our Waihi District Study which is scheduled for completion

in the second quarter of 2020. We will continue to drill at WKP this year with over 5,500 metres of drilling

planned to include step-out drilling from two new sites. The Waihi District Study will include the resource of

Martha Underground, WKP and other targets at a single future point in time however, exploration drilling will

continue throughout this year and into future years to further grow the resource base.”

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Table 1: Updated WKP Project Mineral Resource Table (as at Dec 31, 2019)

Resource Category

RESOURCES

Mt Au g/t Au Koz Ag g/t Ag Koz

Indicated 0.98 13.4 421 25.5 803

Inferred 1.9 12 717 20 1,230

Notes:

- Resources are constrained to within a conceptual underground design based upon the cut-off grade of 2.5 g/t gold which is defined

at a gold price of NZD2,083/oz (US$1,500/oz @ USD:NZD 0.72)

- No dilution is included in the reported figures and no adjustments have been allowed for mining recoveries

- The tabulated resources are estimates of metal contained as troy ounces of gold and do not include allowances for processing.

- All figures are rounded to reflect the relative accuracy and confidence of the estimates and totals may not add correctly.

- There is no certainty that Mineral Resources that are not Mineral Reserves will be converted to Mineral Reserves.

The reported resources at WKP are based on an additional 11,300 metres in 24 holes drilled since the

previous estimate from March 2019. It is also based on a conceptual underground mine design and on

preliminary work currently underway for the Waihi District Study. The Indicated Resource relates entirely to

mineralisation within the well drilled portions of the East Graben vein while the Inferred Resource is

dominated by mineralisation contained within the East Graben vein and two significant high-grade footwall

veins. These three structures contain more than 80% of the Inferred Resource while the remaining resource

is from the East Graben hanging-wall veins and at the T Stream vein where there has been limited drilling

to-date.

Two new drill sites were recently consented (permitted) and drilling has commenced to test the southwestern

strike potential of the East Graben vein zone. The 5,500 metres of drilling planned for 2020 will continue to

test both lateral and vertical extensions of the resources and drill test the strike extent potential of the T-

Stream and Western Vein zones (Figure 1).

The Company continues to advance the Waihi District Study, a preliminary economic assessment that

encompasses multiple ore targets. The Martha Underground and WKP Projects represent the most

significant of these opportunities. Exploration drilling continues at both targets to support the study which is

expected to provide an outlook of Waihi’s growth over the next several years. The study will include

production rates, mining methods, operating costs and capital investments and is expected to be completed

in the second quarter of 2020.

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Figure 1 – Plan View of geology and distribution of known major veins at WKP.

Figure 2 – Long Section of East Graben Vein

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All drill data in relation to the WKP Resource can be found on the Company’s website at

http://www.oceanagold.com/investor-centre/filings/. In line with ASX listing requirements, OceanaGold has

appended the information required by JORC Table 1 for the WKP results to its ASX announcement. JORC

Table 1 is not required under National Instrument 43-101. Readers are referred to the ASX website at

www.asx.com.au or the OceanaGold website at www.oceanagold.com to view JORC Table 1.

- ENDS -

For further information please contact:

Investor Relations Media Relations

Sam Pazuki

Tel: +1 720 602 4880

[email protected]

Melissa Bowerman

Tel: +61 407 783 270

[email protected]

www.oceanagold.com | Twitter: @OceanaGold

About OceanaGold

OceanaGold Corporation is a mid-tier, high-margin, multinational gold producer with assets located in the

Philippines, New Zealand and the United States. The Company’s assets encompass the Didipio Gold-Copper

Mine located on the island of Luzon in the Philippines. On the North Island of New Zealand, the Company

operates the high-grade Waihi Gold Mine while on the South Island of New Zealand, the Company operates

the largest gold mine in the country at the Macraes Goldfield which is made up of a series of open pit mines

and the Frasers underground mine. In the United States, the Company operates the Haile Gold Mine, a top-

tier, long-life, high-margin asset located in South Carolina. OceanaGold also has a significant pipeline of

organic growth and exploration opportunities in the Americas and Asia-Pacific regions.

OceanaGold has operated sustainably since 1990 with a proven track-record for environmental management

and community and social engagement. The Company has a strong social license to operate and works

collaboratively with its valued stakeholders to identify and invest in social programs that are designed to build

capacity and not dependency.

For 2020, the Company expects to produce between 360,000 and 380,000 ounces of gold from Haile, Waihi

and Macraes combined at a consolidated All-In Sustaining Costs ranging from $1,075 to $1,125 per ounce

sold.

Competent/Qualified Person’s Statement

The resources and exploration results were prepared in accordance with the standards set out in the 2012

Edition of the ‘Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves’

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(“JORC Code”) and in accordance with National Instrument 43-101 – Standards of Disclosure for Mineral

Projects of the Canadian Securities Administrators (“NI 43-101”). The JORC Code is the accepted reporting

standard for the Australian Stock Exchange Limited (“ASX”).

Information relating to WKP Mineral Resource and Exploration Results in this document has been verified

by, is based on and fairly represents information compiled by or prepared under the supervision of Mr Peter

Church, a Chartered Professional of the Australasian Institute of Mining and Metallurgy and an employee of

OceanaGold. Mr Church has sufficient experience that is relevant to the style of mineralisation and type of

deposit under consideration and to the activity being undertaken to qualify as a Competent Person as defined

in the JORC Code and is Qualified Persons for the purposes of the NI 43 101. Mr Church consents to the

inclusion in this public report of the matters based on their information in the form and context in which it

appears.

Cautionary Statement for Public Release

Certain information contained in this public release may be deemed “forward-looking” within the meaning of

applicable securities laws. Forward-looking statements and information relate to future performance and

reflect the Company’s expectations regarding the generation of free cash flow, execution of business

strategy, future growth, future production, estimated costs, results of operations, business prospects and

opportunities of OceanaGold Corporation and its related subsidiaries. Any statements that express or involve

discussions with respect to predictions, expectations, beliefs, plans, projections, objectives, assumptions or

future events or performance (often, but not always, using words or phrases such as "expects" or "does not

expect", "is expected", "anticipates" or "does not anticipate", "plans", "estimates" or "intends", or stating that

certain actions, events or results "may", "could", "would", "might" or "will" be taken, occur or be achieved) are

not statements of historical fact and may be forward-looking statements. Forward-looking statements are

subject to a variety of risks and uncertainties which could cause actual events or results to differ materially

from those expressed in the forward-looking statements and information. They include, among others, the

accuracy of mineral reserve and resource estimates and related assumptions, inherent operating risks and

those risk factors identified in the Company’s most recent Annual Information Form prepared and filed with

securities regulators which is available on SEDAR at www.sedar.com under the Company’s name. There are

no assurances the Company can fulfil forward-looking statements and information. Such forward-looking

statements and information are only predictions based on current information available to management as

of the date that such predictions are made; actual events or results may differ materially as a result of risks

facing the Company, some of which are beyond the Company's control. Although the Company believes

that any forward-looking statements and information contained in this press release is based on reasonable

assumptions, readers cannot be assured that actual outcomes or results will be consistent with such

statements. Accordingly, readers should not place undue reliance on forward-looking statements and

information. The Company expressly disclaims any intention or obligation to update or revise any forward-

looking statements and information, whether as a result of new information, events or otherwise, except as

required by applicable securities laws. The information contained in this release is not investment or financial

product advice.

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