TORONTO, ONTARIO--(CCNMatthews - Sept. 14, 2006) - Greencastle Resources Ltd. (TSX VENTURE:VGN) and Orezone Resources Inc. (TSX:OZN)(AMEX:OZN) report that assay results have been received from a rotary air blast ("RAB") and reverse circulation ("RC") drilling program carried out by Orezone on Greencastle's 1,148 km2 Namaga permit in Niger, West Africa. The Namaga permit, located in the Tera greenstone belt in western Niger surrounds Koma Bangou, the country's largest artisanal mining site. The first phase of drilling consisted of 4,268m of RAB and 2,000m of RC drilling to test targets previously identified by Ashanti Goldfields through soil geochemistry, mapping and trenching as well as a recent geophysical survey conducted by Orezone. The best results have come from two drill fences that tested a two km-long quartz rubble geochemical anomaly in the Block 3 target area, located 20km west of Koma Bangou.

Hole B3B0154 intersected 10m grading 4.86 g/t starting at 32m downhole. Hole B3B0155 (adjacent) intersected 22m at 2.40 g/t starting at 10m downhole. A follow-up program is planned for later this fall. Further information is needed to determine true widths. Please see table of significant results at www.greencastleresources.com

Greencastle optioned the Namaga and Koyria properties to Orezone in January of this year. Orezone can earn a 50% interest in the Namaga and Koyria permits by spending $1 million on each property over three years and can increase its interest to 75% by completing a Bankable Feasibility Study. It is anticipated that drilling will commence on the Koyria permit, located in the Sirba greenstone belt and along strike from Semafo's (SMF:TSX) Samira Hill Mine, after the rainy season this year.

Battle Mountain Trend, Nevada

In addition to gold exploration concessions in Niger, West Africa, currently under option to Orezone, Greencastle is advancing four gold exploration projects located on the Battle Mountain-Eureka mineral trend, Nevada. This highly productive regional trend, which hosts multi-million ounce gold deposits such as Barrick's Pipeline deposit and recent discovery nearby at Cortez Hills, has become the subject of intense exploration activity by a host of junior explorers, including Rob McEwen's U.S. Gold Corp.

At Greencastle's 100% owned Coal Canyon project, a program of two core holes, each to an approximate depth of 1,300 feet designed to test a zone in the Grouse Creek Fault has been completed and samples are being prepared for assay. Earlier work identified anomalous gold values within a zone of hydrothermally altered sedimentary rocks, thought to be Lower Plate rocks below the Roberts Mountain Thrust. The Grouse Creek Fault trends under pediment cover to the northwest, where Barrick's ET Blue project is located, approximately 10 km to the north towards the Cortez Hills area.

At Greencastle's 100% owned Jewel Ridge project, geologists have finalized drill plans a commenced permitting for a reverse circulation drill program planned to evaluate a number of targets later this fall pending rig availability. In 2004, Greencastle reported hole HRC-11, which returned 2.1 grams per tonne (g/t) Au over 39.6 metres at Jewel Ridge. Jewel Ridge is located between the Lookout Mountain gold deposit, currently under exploration by Staccato Gold Resources Ltd. and the former Ruby Hill gold mine, which was operated by Homestake Mining Co. from 1997 until 2002, producing approximately 135,000 ounces of gold annually and currently being prepared for additional production by Barrick Gold Corp.

Oil and Gas Royalty

In Saskatchewan, development continues at the Primate oil project where Greencastle holds a gross overriding royalty. Production at Primate continues to increase with three new wells completed during June and July and additional wells planned. Royalty income for the second quarter ended June 30 was $519,856.

Uranium in Niger

Greencastle has submitted two applications for uranium concessions in Niger, West Africa, the world's fourth largest uranium producer. Changes to Niger's mining code have delayed the granting of concessions.

About Greencastle

Greencastle is a natural resource exploration company with six active gold projects. Cash flow is derived primarily from the Primate oil field in Saskatchewan, discovered by Greencastle in 2003 and converted to a royalty in 2004. Greencastle reported net earnings of $437,476 ($0.014/share) for the six months ended June 30, 2006. Management continues to evaluate new projects both for our own account and for possible joint venture.

To find out more about Greencastle Resources Ltd (TSX VENMTURE:VGN), visit our website at www.greencastleresources.com.

Drilling on the Namaga property was supervised by Dr. Pascal Marquis, VP Exploration, Orezone and Mr. Jeff Ackert, VP Technical Services, P.Geo., who is a Qualified Person under National Instrument 43-101 and has reviewed and approved the technical information in this release. Samples were collected at a minimum of every 1m down the hole and 2m composite samples were analyzed using a 2kg bottle roll cyanide leach at the Abilab Laboratory in Ouagadougou, Burkina Faso, an internationally recognized laboratory. A minimum of 10% of the samples are for QA/QC, which includes random head assays, duplicates, standards and blanks, as well as tail assays on samples that returned at least 0.5 g/t.

This news release includes certain "forward looking statements" within the meaning of the United States Private Securities Litigation Reform Act of 1995. Without limitation, statements regarding potential mineralization and resources, exploration results, and future plans and objectives of the Company are forward looking statements that involve various degrees of risk. The following are important factors that could cause the Company's actual results to differ materially from those expressed or implied by such forward looking statements: changes in the world wide price of commodities, general market conditions, risks inherent in exploration, risks associated with development, construction and mining operations, the uncertainty of future profitability and the uncertainty of access to additional capital. The Company relies on litigation protection for forward looking statements.

Issued and Outstanding: 35,882,005

FOR FURTHER INFORMATION PLEASE CONTACT:

Greencastle Resources Ltd.
Anthony Roodenburg
CEO
(416) 485 1327
www.greencastleresources.com