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Assay Results from New Massive Sulphide Outcrop Discovery at Foremore

 Vancouver, British Columbia, July 18, 2003: Roca Mines Inc. ("Roca") announces that initial assay results have been received from one of two recently discovered massive sulphide outcrops on the Company's Foremore Project located approximately 45 km north of Barrick Gold's Eskay Creek Mine in northwestern British Columbia.

The "BRT Showing" is located above the northern portion of the North Boulder Field, an area comprising many massive sulphide boulders originally discovered by Cominco in the late 1980's. The new showing is a layered sequence of semi-massive to massive sulphides including; sphalerite, galena, pyrite and lesser chalcopyrite, and is structurally thickened due to local deformation of the rocks. Assay results by ACME Analytical Labs of Vancouver for chip samples across one outcrop are summarized in Table 1 below;

Table 1. Summary of North Zone - BRT Showing Chip Sample Assays across 2.95m
Sample # Interval  Zinc   Lead    Copper   Silver      Gold
           (m)    (Zn)%   (Pb)%   (Cu)%    (Ag)gm/mt  (Au)gm/mt
A 126274   0.54     .69    .30     .159     20.6       1.91
A 126275   0.40   14.38   4.26     .089    161.8       1.83
A 126276   0.54   12.32  13.44     .184    228.2       2.70
A 126277   0.30     .36    .20    2.038    114.4       2.14
A 126278   0.61   10.94   9.19     .079    180.1       3.17
A 126279   0.56   12.23   8.53     .170    226.7       4.43
Average    2.95   10.24   8.58    0.27     186.6       2.04

These assay results and the textures observed in the outcrop showing are directly comparable to many of the mineralized boulders found in the North Boulder Field (NBF). Cominco reported average assays of 10.2% Zn, 3.5% Pb, 87 gm/mt Ag and 1.1 gm/mt Au from layered massive sulphide boulders in the North Boulder Field in 1989.

A similar massive sulphide mineralized horizon approximately 50cm thick has been observed along strike in a trench approximately 30m southwest. Assays are pending for this exposure. Also, initial geochemical results from an oxidized float grab sample taken along strike at a distance of approximately 50m southwest of the BRT Showing returned 54,613ppm Zn, >9,999ppm Pb, 600ppm Cu, >200ppm Ag and 81,495ppb Au. Assays are also pending for this sample and additional samples in that area.

The newly discovered BRT Showing is located approximately 3.5 km west of the SG Discovery Zone (a gold-rich massive sulphide outcrop discovered by Roca in 2002), and it remains open along strike both to the northeast and the southwest, and down dip.

The recent discoveries of new precious metal-rich massive sulphides in outcrop, and over substantial areas, are significant for the Foremore Project. These discoveries highlight the potential of favorable stratigraphic horizons located uphill from known mineralized boulder fields. It also demonstrates the important role that prospecting plays in discovery at Foremore and the Company believes that that focus will continue to generate discoveries in outcrop consistent with the current geological model. To this end, Roca's field crews are continuing an extensive search for new mineralized showings through a program of prospecting, mapping and trenching. Crews are also evaluating the use of various geophysical methods over the showings to aid in targeting an initial drill program.

Please visit for details and location maps of the SG Zone and the North Zone, as well as target areas and boulder fields previously described.

Roca also announces that the private placement announced on June 30, 2003 has closed. 575,000 common shares with a hold period expiring on November 11, 2003 were issued raising proceeds of $143,750. Funds from this private placement will be used for working capital and to add to the company's exploration reserves.

"Scott Broughton"

Scott E. Broughton, P.Eng - President

For further information contact Scott Broughton or John Mirko at:
Tel: 604-684-5900 (Broughton Ext. 114 / Mirko Ext. 110)
Email: mailto:[email protected] / mailto:[email protected]

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

You can view the Previous News Releases item: Tue Aug 26, 2003, Foremore Exploration Update

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