SOURCE: Grenville Gold Corporation

April 10, 2007 09:15 ET

43-101 on La Espanola Reports +1% Copper in Chip Samples on Two Levels of the Rosa Maria Mine and in Ore Stockpile

VANCOUVER, BC -- (MARKET WIRE) -- April 10, 2007 -- Grenville Gold Corporation ("Grenville" or "the Company") (TSX-V: GVG) (PINKSHEETS: GVLGF) is pleased to announce it has received the preliminary National Instrument 43-101 Technical Report on the La Espanola Property. The following comments are comprised of excerpts from the 43-101. The reader is encouraged to review the full report which will be posted on Sedar.

Grenville contracted the author, Luc Pigeon M.Sc., P.Geo., to prepare an independent Technical Report on the La Espanola Property (the "Property") and to propose, if warranted, an exploration program. This report was prepared in accordance to the guidelines set forth under National Instrument 43-101 Standards of Disclosure for Mineral Projects and Form 43-101F1 Technical Report.

Highlights

Samples LS001 is a chipped random grab sample taken from the first tunnel level. LS006 and LS007 are chipped random grabs samples taken from the second mine level. LS004 and LS005 are grab samples taken from an ore stockpile near the adit of the Rosa Maria vein. The geochemical signature of the author's samples includes elevated copper, all over one (1) percent, silver, zinc, and gold. Elevated lead results are also noted. Sample LS001 also contained twenty one (21) parts per million molybdenum.

The La Espanola Property Background

The La Espanola Property is a copper prospect and is centered on an abandoned copper mine named Rosa Maria. It is located in the Coayllo District, Canete Province, Department of Lima, in the Republica del Peru about one hundred (100) kilometers straight-line distance, south-southeast of Lima, the capital city of Peru. Elevations on the property range from eight hundred (800) metres to twenty-four hundred (2,400) metres.

Terrones and Wolfe (1954) visited the Rosa Maria vein for Cerro de Pasco Corp. and produced a map of the vein. They took two chip samples from the Rosa Maria vein and one grab sample of sorted ore on a dumpsite. Table 6 below summarizes their [historic] sampling and assay results.

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Sample Number    Sample Type   Width (meters)          Cu         Ag

11239              Chip         7.7 m                 7.60%     0.8 oz
11240              Chip        11.0 m                 3.25%     0.6 oz
11241              Grab        Not applicable        24.10%     0.8 oz
-****-

The Rosa Maria vein surface exposure can be traced north-north-westerly for three hundred (300) meters along strike and varies, both at surface and in the mine workings, from half (0.5) a meter to three (3) meters in thickness. The vein is exposed on the steep eastern slope of a northwest-trending ridge. Surface and oxide level mineralization consists of quartz veins hosting copper oxides including tenorite, malachite, chrysocolla, and cuprite whereas the sulfide level mineralization consists of quartz veins with bornite, pyrite and minor chalcopyrite accompanied with intense silicification of the wall rocks. The limit of oxide copper mineralization is roughly fifty (50) meters below the surface. The Rosa Maria Mine consists of three underground mined levels that were mined from the 1940's to the mid 1970's.

In the area of the Rosa Maria Mine the rocks are mostly intermediate in composition and members of the Coastal Batholith. These rocks are cross-cut by intermediate to mafic dykes and sills. Emplacement of these dykes is controlled by a fracture and fault system that trends northnorthwest, three hundred thirty (330) to three hundred forty (340) degrees, dips sub-vertically, and that is concordant with and host to the Rosa Maria vein. The Rosa Maria vein is a quartz vein with carbonates hosting chalcopyrite, bornite, sphalerite, and magnetite and secondary copper oxides including chrysocolla, malachite, cuprite, and tenorite. All previous work performed on the Property targeted this vein. The style and form of mineralization fits a copper +/- silver quartz vein style deposit of the intrusion-related subtype. The Phase I Exploration program is currently underway. It consists of small-scale geological mapping near the Rosa Maria vein and large-scale property wide mapping and sampling in order to identify new anomalous areas. The surface exposure of the Rosa Maria vein is being systematically sampled and some channel sampling has been done in the Rosa Maria Mine.

Cerro de Pasco Corporation was the first to document exploration in the Rosa Maria Mine area. Only the report by Terrones and Wolfe (1954) for Cerro de Pasco Corp. was available to the author. The others are summarized by Elescano (2007) as consisting of field investigations and geological reports that span the 1920's to 1956. Aside from artisinal workings, two companies exploited the Rosa Maria vein. The companies were Compania Cobre Asia in the 1940's and Compania Cobre Cata Acari from the 1950's to 1975 (Elescano, 2007).

Compania Cobre Asia, owned by Mr. Nicanor, attempted the first organized exploitation of the Rosa Maria vein on Cerro Huitor in the 1940's. Compania Cobre Cata Acari owned by Mr. Cocharne, exploited the Rosa Maria vein from the 1950's to 1975, first using cable cars to transport ore material to a small plant in Cata, and later, the company built a road to the Rosa Maria vein allowing them to transport more ore. According to informal oral reports, ten (10) to fourteen (14) percent copper was extracted from cuprite, malachite, bornite, and chalcopyrite. The company ceased mining in 1975. These reports are historical, cannot be verified and therefore, cannot be relied upon.

Assay Results from Recent Grab Samples

Samples LS001 is a chipped random grab sample taken from the first tunnel level. LS006 and LS007 are chipped random grabs samples taken from the second mine level. LS004 and LS005 are grab samples taken from an ore stockpile near the adit of the Rosa Maria vein. The geochemical signature of the author's samples includes elevated copper, all over one (1) percent, silver, zinc, and gold. Elevated lead results are also noted. Sample LS001 also contained twenty one (21) parts per million molybdenum.

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Sample           Cu       Ag       Zn        Au     Pb
Number           ppm      ppm      ppm       ppb    ppm

LS001          > 10000    7.6     1451.1    1731    349
LS004          > 10000    9.5    > 10000     162    565
LS005          > 10000   15.6    > 10000     552    322
LS006          > 10000   12.7     4302.6     133    490
LS007          > 10000   44.1     2455.2    2349   3361
DUP LS007      > 10000   43.5     2377.1    2427   3317
-****-

The Property comprises three thousand six hundred (3600) hectares; therefore, the sampling is not representative of the whole Property.

Copper mineralization is present at surface and in the mine workings and based on the samples it contains more than one (1) percent copper. Further exploration on the Property is warranted. A systematic property scale mapping and sampling program is needed to fully appreciate the potential of this Property. Furthermore, the Rosa Maria vein contains appreciable concentrations of copper (i.e. more than one (1) percent) at the lowest level of the mine however no information exists as to the down-dip continuation of the Rosa Maria vein; host of a previously producing copper mine.

Further information updates regarding the Phase I, Phase II Exploration Program shall be released in due course. Independent geologist Mr. Luc Pigeon, P.Eng is a qualified person as defined by National Instrument 43-101 and was responsible for the contents of the report.

About Grenville Gold Corporation

Grenville Gold www.grenvillegold.com is a junior resource company seeking prospective properties in Peru and Ecuador. The company has three subsidiaries: Inversiones Mineras Alexander S.A.C. in Peru, Minera MineGreville S.A. in Ecuador and Parkman Diamond Corp. in Ontario, Canada. Grenville Gold plans to leverage the experience of its Board and Management in exploration and mining to develop its growth strategy in North and South America. For further information contact 604-669-8842.

On behalf of the Board of Directors,

"A. Paul Gill"
 President & CEO
We Seek Safe Harbour

The TSX-Venture Exchange has not reviewed and does not accept responsibility for the adequacy or accuracy of this release. All statements, other than statements of historical fact, included herein are forward-looking statements that involve various risks and uncertainties. There can be no assurance that such statements will prove to be accurate, and actual results and future events could differ materially from those anticipated in such statements. Important factors that could cause actual results to differ materially from the Company's expectations are disclosed in the Company's documents filed from time to time with the TSX Venture Exchange, the British Columbia Securities Commission, the Ontario Securities Commission, and the Alberta Securities Commission.

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