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Oceanagold Extends High-Grade GOLD Mineralisation at Wkp

Drill Results

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MEDIA RELEASE

9 July 2018

OCEANAGOLD EXTENDS HIGH-GRADE GOLD MINERALISATION AT WKP

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

intersection of further high-grade gold mineralisation along the East Graben vein at the Company’s WKP

prospect in New Zealand. These results stem from the latest round of drilling and form part of a more

extensive ongoing exploration program that includes surface mapping and ground geophysics.

Significant Intercepts (true widths)

 8.7 m @ 24.54 g/t Au, 32.0 g/t Ag

 7.6 m @ 10.84 g/t Au, 12.3 g/t Ag

 7.0 m @ 11.15 g/t Au, 10.6 g/t Ag

 1.2 m @ 58.2 g/t Au, 49.0 g/t Ag

 11.2 m @ 5.82 g/t Au, 7.6 g/t Ag

 9.8 m @ 4.53 g/t Au, 4.2 g/t Ag

 1.2 m @ 35.49 g/t Au, 24.0 g/t Ag

Mick Wilkes, President and CEO of OceanaGold said, “The latest drill results support the significance of this

exciting exploration program targeting high grade ore mined from underground, and its potential to contribute

to a further extension of mine life at our Waihi operation . These drill results, albeit early in the discovery

process, are on par with underground targets being reported from drilling at our Martha Project; a world class

multi-million ounce high grade gold deposit.”

The Company commenced exploration of the WKP prospect in August 2017 with 1 - 2 diamond rigs drilling

8,005 metres in 1 7 holes to date. Since the November 2017 exploration update, 6,803 metres have been

drilled at WKP focussing on the potential of the East Graben Vein; one of three major low sulphidation

epithermal gold-silver veins. This drilling has returned a best true width intercept of 8.7 m @ 24.54 g/t Au

within a broader zone of 5 1.3 m @ 7.18 g/t Au. This hole is an approximate 120-metre step-out hole north

and along strike from an intercept of 7.6 m @ 10.84 g/t Au previously reported on the East Graben Vein.

Drilling has now delineated approximately 750 metres of strike length open in both directions and over 200

metres vertical extent that is open for 100 – 200 metres up-dip.

Two other significant veins, West and T Stream (Figure 1), have also been drill tested with encouraging

widths and grades of gold mineralis ation intersected in several holes . On the West vein, three holes for a

total of 1,299 metres were drilled with a best true width intercept of 9.8 m @ 4.53 g/t Au and 4.2 g/t Ag (West:

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WKP48B). This result supports historical downhole intercepts of 14.0 m @ 9.13 g/t Au and 10.2 m @ 5.92

g/t Au (West: WKP29). At T Stream, three holes were drilled for a total of 1,721 metres with best downhole

intercept of 3.1 m @ 5.23 g/t Au which go along with historic true width intercepts that included 7.5 m @

17.22 g/t Au (T Stream: WKP31) and 6.5m @ 6.59 g/t Au (T Stream: WKP24). The latest drilling at T Stream

suggest the recent holes intersected deeper levels of the vein and either below the optimal zone of

mineralisation or outside of the mineralised shoot. Further drilling is required to test strike and dip potential.

Over the remainder of 2018, 7,800 metres of diamond drilling is scheduled to follow up on the excellent

results to date.

Figure 1: Plan View of geology and distribution of known veins at WKP

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Figure 2: Cross Section with photo of East Graben Vein in hole WKP42

Figure 3: Long Section on East Graben Vein

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Table 1: Significant Intersections from OceanaGold programme to date

- ENDS -

For further information please contact:

Investor Relations Media Relations

Sam Pazuki

Tel: +1 416 915 3123

Melissa Bowerman

Tel: +61 459 900 099

Jeffrey Sansom

Tel: +61 3 9656 5300

[email protected] [email protected]

www.oceanagold.com | Twitter: @OceanaGold

WKP40 2760135 6429847 184 161.9 -35.1 207.0 211.3 4.3* 7.58 19.6 East Graben HW

WKP40 2760135 6429847 184 161.9 -35.1 492.0 500.8 7.6 10.84 12.3 East Graben

WKP41 2760135 6429847 184 161.9 -60 218.9 222.9 1.4 6.05 6.1 East Graben HW

WKP42 2760135 6429847 184 141.9 -30 257.0 259.0 1.9 14.59 28.7 East Graben HW

WKP42 2760135 6429847 184 141.9 -30 410.0 469.0 51.3 7.18 11.3 East Graben

414.8 419.3 1.9 14.35 17.3 East Graben

430.5 440.5 8.7 24.54 32.0 East Graben

450.0 452.7 2.5 8.50 25.7 East Graben

466.1 468.0 1.7 12.83 10.7 East Graben

WKP42 2760135 6429847 184 141.9 -30 492.8 494.2 1.1 8.75 8.1 East Graben FW

WKP42 2760135 6429847 184 141.9 -30 505.5 506.9 1.2 35.49 24.0 East Graben FW

WKP44 2760135 6429847 184 129.9 -30 323.4 325.2 1.2 9.36 8.7 East Graben HW

WKP44 2760135 6429847 184 129.9 -30 351.0 354.2 3.2* 5.00 5.2 East Graben

WKP44 2760135 6429847 184 129.9 -30 382.6 383.8 1.0 33.70 27.0 East Graben

WKP50 2760135 6429847 184 348.2 360.4 11.2 5.82 7.6 East Graben

348.2 351.5 3.0 10.45 17.3 East Graben

357.1 360.4 3.1 10.46 9.4 East Graben

WKP50 2760135 6429847 184 109.9 -30 468.3 469.6 1.2 58.20 49.0 East Graben FW

WKP52 2760135 6429847 184 77.9 -30 418.0 425.2 7.0 11.15 10.6 East Graben

WKP47 2759665 6430245 235 99.9 -40 222.0 225.1 3.1* 5.23 18.2 T Stream

WKP48 2759230 6429895 274 131.9 -30 186.6 188.6 2.0* 9.06 5.5 Western

WKP48A 2759230 6429895 274 131.9 -30 186.7 191.8 5.1* 4.49 3.7 Western

WKP48B 2759230 6429895 274 131.9 -30 181.5 201.0 9.8 4.53 4.2 Western

WKP48B 2759230 6429895 274 131.9 -30 277.3 281.4 2.4 6.03 4.1 Western

WKP48B 2759230 6429895 274 131.9 -30 347.2 349.1 1.9* 6.00 4.1 Western

WKP48B 2759230 6429895 274 131.9 -30 385.2 386.6 1.2 16.50 13.0 Western

To

(m)

True

width

(m)

Gold

Grade

(g/t)

Silver

Grade

(g/t)

VeinFrom

(m)Drill Hole ID East#

(m)

North#

(m)

Collar

RL

(m)

Az# Dip

including

and

including

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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 Phil ippines. 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 op en 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 over the past 27 years with a proven track -record for environmental

management and community and social engagement. The Company has a strong social license to oper ate

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

designed to build capacity and not dependency.

The Company has recently increased its 2018 guidance range and now expects to produce 500,000 to

540,000 ounces of gold and 15,000 to 16,000 tonnes of copper with All -In Sustaining Costs that range from

$725 to $775 per ounce sold.

Competent/Qualified Person’s Statement

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

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

(“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 Waihi exploration results in this document has been verified by, is based on and fairly

represents information compiled by or prepared under the supervision of Lorrance Torckler, a Fellow of the

Australasian Institute of Mining and Metallurgy and an employee of OceanaGold. Mr Torckler has sufficient

experience that is relevant to the styl e 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 Torckler 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, est imated 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, obj ectives, assumptions or

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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 ope rating 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, read ers 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 t o 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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