OGC mineral resource increase at Frasers Underground mine

OGC mineral resource increase at Frasers Underground mine

(MELBOURNE) OceanaGold Corporation (ASX: OGC, TSX: OGC, NZX: OGC) (“the Company”) is pleased to announce an updated mineral resource estimate for the Frasers Underground mine in Otago, New Zealand.

Highlights
• Measured and Indicated Resources for the main Hangingwall Shear mineralisation at Panel 2 has increased to 7.9Mt @ 2.36g/t Au for 602Koz Net of mining depletion in 2011, this represents an addition of 118Koz since 31 December 2010, a 25% increase.
• Infill drilling of the Lower Zone has expanded the Measured and Indicated Resources to 1.0Mt @ 2.51 g/t Au for 77Koz. This expansion has replaced mining depletion in this zone for 2011.
• Frasers Underground mine life expected to extend to at least 2017.
• Both the Hangingwall Shear and Lower Zone Inferred Resource areas are extended down-dip and remain open to the northeast.
• Total Measured and Indicated Resources for Frasers Underground, including Panel 1, now stands at 10.2Mt @ 2.26g/t Au for 745Koz.

Mick Wilkes, Managing Director & CEO commented, “The exploration program over the past 12 months has been successful in considerably expanding the measured and indicated resources at Frasers Underground, and is expected to extend the mine life at that operation by at least another three years. We will continue to complete lower zone infill and extension drilling and explore the Hangingwall down dip, which has the potential to add further years to the mine life at Frasers Underground.”

The Frasers Underground mine primarily exploits down-dip extensions of Hangingwall Shear mineralisation currently being mined in the Macraes Open Pit. Within Panel 2 of the Frasers Underground mine, the Hangingwall Shear mineralisation is typically between 5 and 10 metres thick. Production stoping has recently commenced along a second and thinner mineralised shear, 10 to 20 metres beneath, and sub-parallel to the Hangingwall Shear. This mineralisation is known as the Lower Zone and includes an area referred to in previous releases as ‘Panel 2 Deeps’.
Ongoing diamond drilling from underground mine development, in conjunction with diamond drilling from surface, continues to test the fringes of the current Panel 2 resource area as well as to infill the existing area of Inferred Resource. To-date in 2011, this drilling has significantly extended the limits of the Panel 2 resource, both for the Hangingwall Shear and the Lower Zone.

Refer to full document on website (http://www.oceanagold.com/assets/documents/filings/2011-Press-Releases/111205-FRUG-Resource-Update-Final.pdf) for all 'Figures' and 'Tables' mentioned below.

Figure 1 shows the expanded footprints for Indicated and Inferred Resource limits within the Hangingwall Shear. The mineralisation remains open to the north-east.

Figure 2 shows the expanded footprints for Indicated and Inferred Resource limits within the Lower Zone. The mineralisation remains open to the north-east.

Figure 3 shows the relative locations of Panel 1, Panel 2 and Lower Zone.

Table 1 summarises the estimated Panel 2 resource, depleted for mining as at 20 November 2011. Net of mining depletion, this represents an increase in Measured and Indicated Resources of 124Koz and an increase in Inferred Resources of 177Koz since 31 December 2010.

Table 2 shows total resources for the total Frasers Underground Mine, including both Panel 1 and Panel 2.

Qualified Persons
Jonathan Moore, Group Mine Geology Manager of Oceana Gold New Zealand Limited is the “qualified person” pursuant to National Instrument 43-101 of the Canadian Securities Administrators. He is a member and Chartered Professional with the AusIMM.
The Qualified Person Mr Moore has reviewed the technical information and approved the contents of this news release.

Quality Control
Mr Jonathan Moore, B.Sc (Hons) Geology and Dip.Grad. Physics, is the Group Mine Geology Manager with Oceana Gold (NZ) Ltd and is the Qualified Person under National Instrument 43-101 – Standards of Disclosure of Mineral Projects (“NI 43-101”) for the technical disclosure in this release and has verified the data disclosed, including sampling, analytical and test data underlying the information contained in this release. Geological modelling was completed by Dr. Matthew Grant, Resource Geologist with Oceana Gold (NZ) Ltd, PhD Applied Geology, BSc (Hons) Geology, MAIG. Geological interpretation was by Dr. Grant and Mr. Peter Edwards, Senior Project Geologist, MSc (Hons) Geology, Grad. Dip. Business, Grad. Dip Computing, MAusIMM. Underground drilling samples, collected at approximately 1m intervals from sawn diamond core, were prepared and assayed by fire assay methods at the SGS Minerals facility (and former AMDEL facility) at Macraes, New Zealand. Surface drilling samples, collected at 1m intervals from sawn diamond core were prepared and assayed by fire assay methods at the SGS Minerals facilities in Westport and Waihi, New Zealand. Standard reference materials were inserted to monitor the quality control of the assay data of the surface and underground samples.

For further scientific and technical information (including disclosure regarding mineral resources and mineral reserves) relating to the Macraes Project, please refer to the NI 43-101 compliant technical report entitled “Independent 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 and available at www.sedar.com under the Company’s name.

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