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PBR Drilling and Foremore Mobilization

 Vancouver, British Columbia, June 19, 2003: Roca Mines Inc. ("Roca") announces that, further to its press release dated April 9, 2003, a first phase of exploration on the PBR Property has recently been completed at a cost of approximately Cdn$150,000. Previous work in 1998 by Homestake Canada Inc. ("Homestake") indicated that the volcanic/sedimentary rock sequence at the PBR property is correlative stratigraphically, compositionally and structurally to the volcanic/sedimentary sequence overlying the Eskay Creek ore bodies. Homestake also noted that stream sediment geochemistry indicated anomalous 'Eskay-suite' metals in drainages from the ridge. In 2001, Homestake drilled a single diamond drill hole from the top of the ridge (PBR01-01) ending the hole at a depth of approximately 1419.2m (4,656 feet) in the volcanic/sedimentary package without intersecting the interpreted underlying Contact Mudstone/Rhyolite, essentially leaving the target untested.

In May 2003, Roca mobilized a diamond drill to the property and re-established on the 2001 drill site. PBR01-01X was deepened a further 350.95m (1,151 feet) to a final depth of 1770.1m (5,807 feet). The hole intersected interlayered basalts (approximately 84%) and variably sulphidic mudstones (approximately 16%). Sulphides in the mudstones consist predominantly of pyrite, however disseminated arsenopyrite, including arsenopyrite 'needles' are present over a 2m interval at approximately 1450m (4,757 feet). The depth below valley bottom of the mineralized horizon observed is approximately 520m. Although the assays from the arsenopyrite mineralized zone returned only background levels of gold and silver, this style of arsenopyrite mineralization, in conjunction with sericite alteration of the mudstone observed deeper in the hole, are currently known to occur within the Contact Mudstone horizon at Eskay Creek in proximity to some of the ore bodies. Roca is currently planning a second phase of work that could involve downhole geophysics and diamond drilling from the existing hole and 'wedging' (directing the lower part of the hole in a new direction) in order to investigate for Contact Mudstone stratigraphy and test the lateral extents of the arsenopyrite mineralized horizon.

Roca also reports that a field crew has been mobilized to its Foremore Project to begin the first of a proposed two-phase exploration program recommended by Equity Engineering of Vancouver. The first phase of exploration, budgeted at $450,000, will consist of prospecting, mapping, sampling and diamond drilling. Initial drilling will focus on the SG Zone, a VHMS outcrop discovered in the fall of 2002.


"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: [email protected] / [email protected]

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

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