Portal Resources Ltd.

Portal Resources Ltd.

March 14, 2005 09:15 ET

Portal Outlines 400 Meter Long Vein at 10 g/t Gold Equivalent on Arroyo Verde




MARCH 14, 2005 - 09:15 ET

Portal Outlines 400 Meter Long Vein at 10 g/t Gold
Equivalent on Arroyo Verde

VANCOUVER, BRITISH COLUMBIA--(CCNMatthews - March 14, 2005) - Portal
Resources Ltd. (TSX VENTURE:PDO) is pleased to announce that sampling at
Arroyo Verde has outlined a 400 meter long shoot grading 10 g/t gold
equivalent over 2 meters on the Principal Vein. The 100% owned Arroyo
Verde project hosts low sulphidation epithermal gold - silver veins. To
date six veins have been exposed on the surface or in drill holes in a
rhyolite dome complex setting. The project consisting of 40,000ha (155
square miles) is located in the northeast corner of Chubut Province,
Patagonia, Argentina; within 3km of the major paved coastal highway and
is amenable to year round field work.

Samples from the current channel/chip sampling program on the western
portion of the Principal Vein, 24 in total, outlined a strongly
mineralized zone averaging 4.45 g/t gold and 353 g/t silver (gold
equivalent: 10.05 g/t using a gold/silver ratio of 1:63) over a strike
length of 400 meters and width from 1.0 to 3.5 meters averaging 2
meters. The samples range up to 6.03 g/t gold and 578 g/t silver (gold
equivalent: 15.2 g/t using a gold/silver ratio of 1:63) over 2.4 meters.
This sampling agrees well with previous limited grab and chip sampling
on this vein.

Exploration continues to demonstrate the prospective nature of the
exposed portion of the Main Rhyolite Dome; other veins will undoubtedly
be discovered. Additionally vein structures associated with large
resistivity - chargibility anomalies, measuring 2.5 kilometers by 2
kilometers are inferred under shallow gravel cover just to the south of
the Main Rhyolite Dome exposure. Fluid inclusion studies indicate that
we are at the top of the mineralized system (230 degrees C) and have
only just begun to explore the full potential. Surface exploration on
the Main Rhyolite Dome area has outlined four high-grade epithermal
veins with strike lengths of 100 to 600 meters and grades up to 70 g/t
gold and 3,500 g/t silver over widths of 0.5 to 2.0 meters. Drilling to
date has only tested the veins to a shallow depth of 30-50 meters, with
intercepts of 5-18 g/t gold and 15-250 g/t silver.

A 4,000 meter drill program is anticipated to start on the first week of
April. The drilling will target the 1) Principal Vein, 2) Northwest "A",
"B", and "C" Veins and 3) Large gravel covered Resistivity-Chargibility
targets measuring 2.5km by 2km to the south of the Main Arroyo Verde
Vein zones under a shallow gravel cover.

The high grade 400 meter western portion of the Principal Vein will be
drill tested by five combination RC - diamond drill holes at a vertical
depth of 100 to 150 meters under the best previous RC drill intercepts
and surface sample results.

The rock channel samples were collected by a rock channel saw under the
supervision of Mr. Gary Nordin, PGeo., British Columbia, who is a
qualified person as defined by National Instrument 43-101. The samples
were placed in plastic sample bags, sealed and transported under chain
of custody to the Mendoza laboratory of Alex Stewart (Assayers)
Argentina S.A., a subsidiary of the international Alex Stewart
(Assayers) Limited analytical laboratory group where they were analyzed
by fire assay (50 g sub sample) for gold, and silver and trace elements
by ICP. Repeat fire assays were done on samples with gold values over 10
g/t with the reported value being the average of the two fire assay
results. Silver values greater than 50 g/t were also repeated by fire
assay with the fire assay result being reported.


Bruce Winfield, President, CEO and Director


Contact Information

    Portal Resources Ltd.
    Tom Corcoran
    (604) 629-1929
    (604) 629-1930 (FAX)
    The TSX-Venture Exchange does not accept responsibility for the adequacy
    or accuracy of this release.