Rainy River Resources Ltd.
TSX VENTURE : RR

Rainy River Resources Ltd.

September 12, 2005 09:00 ET

Rainy River Project; Initial Results from RC Drilling Suggest Two High Priority Drill Targets

VANCOUVER, BRITISH COLUMBIA--(CCNMatthews - Sept. 12, 2005) - Nelson W. Baker, President and COO of Rainy River Resources Ltd. (TSX VENTURE:RR), is pleased to report initial results from an 84-hole reverse circulation heavy mineral till sampling program recently completed by the Company on the Rainy River Project (100%-owned) located in the Kenora Mining District, northwestern Ontario. The program was carried out under the supervision and guidance of Overburden Drilling Management Limited ("ODM"), global leaders in tracing gold in glacially transported overburden cover.

In Phase I, 53 holes were drilled at 150-200 meter spacing. Two areas of very anomalous till with hundreds of gold grains per sample and abundant gold-bearing pyrite were identified. One anomaly is stronger than those associated with Nuinsco's 17 and 433 Zones. In Phase II, completed on August 14, 16 infill holes were drilled at 50-100 meter spacing on the two anomalies and 15 holes were drilled on the new Schwedack option. Preliminary examination of the bedrock cuttings indicates that one anomaly coincides with an area of coarse-grained chlorite-biotite-pyrite alteration and the other is characterized by quartz veining and tourmaline-pyrite-molybdenite alteration suggestive of a structural control.

Between 1994 and 1997, Nuinsco Resources Ltd. (TSX:NWI), using reverse circulation drilling, delineated the "largest and most intensely gold-anomalous till layer ever encountered on a reverse circulation program in Canada, much larger in fact that the anomaly that led to the discovery of the Casa Berardi gold deposits in Quebec." Subsequent drill testing by Nuinsco along the eastern margins of this large gold anomaly resulted in the "blind" discoveries of two gold-rich deposits, the #17 Gold Zone and the 433 Zone, both hosted by permeable, shallow water deposited volcaniclastic rocks associated with the Richardson Caldera structure. Being volcanogenic, the gold occurs in stratigraphic and structural traps rather than shear zones. The two known gold deposits occur within a 600 hectare (6 km2) area of more diffuse gold mineralization that is estimated by ODM to contain 20 million ounces to a depth of 500 metres.

Two independent studies on the Richardson Caldera gold mineralization conducted by Dr. L.D. Ayers, and by Dr. James M. Franklin, a prominent consulting geologist with over 30 years of experience in the study of Bousquet-style (16.5 million ounces of gold) mineral deposits both concluded that the #17 Gold Zone closely resembles those of the prolific Thompson-Bousquet mining camp, one of Canada's largest mining districts, in the Abitibi greenstone belt and has substantial similarities to the Sturgeon Lake area in northwestern Ontario. Both of these analogues are shallow water deposited, gold-rich VMS (volcanogenic massive sulphide) deposits and are multiple deposit systems.

In the current R.C. drilling campaign, the bedrock cuttings are being logged using criteria developed by Dr. Ayres to facilitate the recognition of stratigraphic and structural traps for gold-bearing hydrothermal fluids in the caldera formations. The abundance of native gold grains and gold-bearing pyrite in the overlying glacial till are being used to gauge the relative fertility of these traps.

This highly prospective Archean greenstone belt, which covers most of the Rainy River District, has escaped the level of exploration activity (largely due to its glacial cover) that has characterized many other belts within the Superior Province.

Nelson W. Baker, P.Eng. and President of Rainy River Resources Ltd. is the designated Qualified Person responsible for the exploration program on the Rainy River Project and was responsible for the preparation of this news release.

Rainy River Resources Ltd. is a Canadian mineral exploration company that has acquired a 100% interest from Nuinsco Resources Ltd. (TSX:NWI) in the Rainy River gold and base metal property located in northwestern Ontario. The Rainy River Project presently hosts two "blind" gold deposits and one small but high grade "blind" Ni-Cu-PGE deposit. The Company believes the potential to discover other "blind", Bousquet-style gold deposits within the property to be high.

ON BEHALF OF THE BOARD OF DIRECTORS OF RAINY RIVER RESOURCES LTD.

Nelson W. Baker, President


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

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