Ross River Minerals Inc

Mineralization Expanded on Minitas Prospect at El Pulpo

    Vancouver, Canada (ots/PRNewswire) - Ross River Minerals Inc. (TSX-V: RRM) (the "Company") is pleased to announce that copper porphyry style mineralization discovered at Minitas (see press release dated April 25, 2005) has now been extended by geological mapping, prospecting and Induced Polarization (I.P.) geophysics to cover a northwest to southeast trending area that is at least 2,500 metres in length by 950 metres width in a northeast by southwest direction. Within this defined area are zones of varying intensities of phyllic alteration overprinting potassic alteration (biotite-potassic feldspar). Peripheral and outside this area are zones of propylitic alteration overprinting potassic alteration. Porphyry style mineralization within and peripheral to this area, extending over a vertical distance of at least 90 metres, is exhibited by pyrite-chalcopyrite or their leached equivalents occurring within stockwork and near vertical sheeted quartz veinlets or as disseminations within the altered intrusive granodiorite. The mineralization is open at depth. A total of 583 soil geochemical samples and 287 surface rock samples have been shipped for analyses. The volume of alteration and scale of mineralization indicates that there has been significant hydrothermal fluid movement within this part of the intrusive. Trenching and more systematic rock sampling is now being carried out within the Minitas area.

    Prospecting is also being carried out one kilometre northeast of Minitas where sheeted and stockwork quartz-molybdenite veining and disseminated chalcopyrite has been discovered.

    The El Pulpo copper-gold porphyry project now extends over a distance of 7.0 kilometres in a northeast to southwest direction and 5.5 kilometres in a northwest to southeast direction. There are five centres of copper mineralization - Cerro Colorado (1,900 x 750 metres), La Langosta (1,800 x 1,050 metres), La Cetolla (1,100 x 230 metres), Jocquistes (1,000 x 750 metres) and Minitas (2,500 x 950 metres) occurring peripherally to a core zone with quartz-molybdenite mineralization which has yet to be fully explored. The La Cetolla and Jocquistes prospects have not been fully delineated. This geological setting is typical of many copper porphyry districts occurring worldwide. The project is being supervised by James R. Reeves M.Sc., P.Geo.

    To find out more about Ross River Minerals Inc. (TSX-V: RRM) visit our website at


    Per: "Marcus Foster"


    Marcus N. Foster, President

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

ots Originaltext: Ross River Minerals Inc
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Ross River Minerals Inc., No. 1004 - 750 West Pender Street,
Vancouver, BC, V6C 2T7, Telephone: +1-604-682-2770, Facsimile:

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