Portal Resources Ltd.
TSX VENTURE : PDO

Portal Resources Ltd.

June 14, 2007 15:27 ET

Portal Drilling Follows Up 4.0 Meters Grading 18.9 g/t Gold and 549 g/t Silver at Arroyo Verde Principal Vein

VANCOUVER, BRITISH COLUMBIA--(Marketwire - June 14, 2007) - Portal Resources Ltd. (TSX VENTURE:PDO) is pleased to report that follow up drilling has been completed on the high grade Principal Vein at the Arroyo Verde Project, Chubut Province, Argentina. The Arroyo Verde project consists of 40,000 hectares of concessions (155 square miles) hosting both low sulphidation epithermal gold-silver veins as well as molybdenum-copper porphyry style mineralization.

The current phase of drilling consisted of 2,500 meters in 8 holes including sections of both RC used for the upper portions and diamond drilling used for the vein intersections.

The drill holes continue to probe the Principal Vein over a strike length of 400 meters and to a maximum vertical depth of 295 meters. The holes have intersected zones of hydrothermal breccia varying from 4 meters to 16 meters in length with sections of chalcedonic veinlets and veining with fine disseminated pyrite and wispy sulphides.

Additionally hole PO-110 cut the previously defined hanging wall vein with values of 3.89 g/t Au and 84.2 g/t Ag over a length of 3 meters or 5.29 g/t Au equivalent(i). This intersection discovered unexpectedly in the upper portion of the hole drilled with RC extends the Hanging Wall vein approx 120 meters deeper vertically below the previous intersection in drill hole PO-96 of 12.0 g/t Au over 4 meters Au equivalent(i).

At the Principal Vein, 18 holes totaling 5276 meters have been drilled since 2005 testing the vein over a strike length of 700 meters to a depth of 295 meters vertically below the surface and at a spacing of 50 to 100 meters. In the western portion of the Principal Vein, 14 drill holes have to date outlined a high-grade section along a strike length of 400 meters on surface to a vertical depth of 295 meters.

Listed below are highlights of the previously reported drill intercepts from the Western 400 meter section of the Principal Vein (PV) with Hanging Wall (HWV) Vein intercepts included. The numeric sequence gap in drill holes were drilled on other targets on the property such as the El Porvenir-Refugio Molybdenum-Copper Porphyry discovery:



Intercept Gold Silver Gold (equivalent)
Hole # From - To (meters) (g/tonne) (g/tonne) (g/tonne)

PO-36-PV 136 - 137 1 14.12 499 22.44

PO-37-PV 112 - 115 3 5.51 151 8.03
Incl. 113 - 115 2 7.75 215 11.34

PO-38-PV 126 - 130 4 4.84 202 8.21

PO-39-PV 108 - 110 2 39.79 2727 80.25
Incl. 108 - 109 1 78.17 4712 156.70

PO-41-PV 64 - 66.1 2.1 7.03 50 7.87
Incl. 64 - 65.75 1.7 8.23 55 9.16

PO-48-PV 11 - 15 4 5.52 7 5.65
Incl. 14 - 15 1 13.64 6 13.75
117 - 119 2 7.26 2 7.30

PO-94-PV 200.8 - 205 4.2 18.9 549.2 28.05

PO-95-HWV 56 - 57 1.0 4.1 316.0 9.37

PO-96-HWV 67 - 71 4.0 9.1 173.6 12.00
PV 188.2 - 188.7 0.5 2.6 163.4 5.32

PO-97-PV 187.8 - 189.1 1.30 2.7 115.1 4.62
PV 193.5 - 195 1.50 1.8 126.7 3.91
PV 215 - 217 2.00 6.3 38.1 6.94

PO-104-HWV 126.2 - 127.8 1.6 7.10 180.0 9.77

(i) indicates Gold Equivalent (Au Eq.) calculated using a silver: gold
ratio of 60:1 (the current silver to gold ratio is 50:1)

Note that the length of the intersections listed above represent the
apparent thickness of the veins as measured along the core axis. The true
width of the veins is approximately 70 % of the apparent widths referred to
above.


"Portal Resources is very encouraged by the continuation to depth of the mineralized zone in the western portion of the Principal Vein, as well as with the continuation of the new Hanging Wall vein to the south with good gold-silver values. The assays for this phase of drilling are pending and will be released as they become available," stated David Hottman, Chairman.

Sampling procedure at Arroyo Verde is to split the core on site with one half delivered to Alex Stewart Argentina S.A., a subsidiary of the international laboratory Alex Stewart (Assayers) Limited and transported to their laboratory in Mendoza for analysis. Samples are analyzed by fire assay for gold and silver and ICP for trace elements. Mr. Gary Nordin, P.Geo, British Columbia is the designated Qualified Person in accordance with the guidelines of National Instrument 43-101. Mr. Nordin is responsible for the program design and quality control of exploration undertaken by the Company in Argentina.

ON BEHALF OF PORTAL RESOURCES LTD.

Bruce Winfield, President & CEO

This Press Release may contain, in addition, to historical information, forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. These statements are based on management's expectations and beliefs, and involve risks and uncertainties. These statements may involve known and unknown risks and uncertainties and other factors that may cause the actual results to be materially different from the results implied herein.

The TSX Venture Exchange does not accept responsibility for the adequacy or accuracy of this release.

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