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New Field Work Expands the Horizon Gold Zone

 ROK: #23-04

Vancouver, British Columbia, November 18, 2004: Roca Mines Inc. ("Roca" or "the Company") announces an update on the Horizon Gold Zone, a newly discovered high grade gold mineralized zone on the FOREMORE property, identified in the summer 2004.

The Horizon Gold Zone is located approximately 8.5 km (5.3 miles) south of the volcanogenic massive sulphide mineralized Ryder Showing at the North Zone VMS system. Gold and copper mineralization associated with magnetite (iron oxide) occurs near a contact between a volcanics/limestone sequence and intrusive rocks. As reported previously (see ROK#15-04), a grab sample that assayed 106.9 g/t gold, 59 g/t silver and 2.22% copper was later trenched and sampled over a 3.0m (9.8 feet) length and returned an average assay 18.69 g/t gold, 15.3 g/t silver and 0.52% copper (see ROK#17-04). Following the discovery of additional mineralized rocks to the west of the trenched exposure, a 1 km X 1 km (0.6 X 0.6 mile) grid centred over the trench was established. The grid was geologically mapped at a 1:2,500 scale and soil sampled on 50m centres. A ground-based magnetics geophysical survey was also completed on 12.5m stations and 50m spaced lines over the entire grid.

The recent work at the Horizon Gold Zone has resulted in the identification of an extensive gold-in-soil anomaly, with values as high as 1,329 parts per billion (ppb) (approximately equivalent to 1.3 g/t), that is coincident with a large magnetic high anomaly. A greater-than 50 ppb gold-in-soil contour includes an area of approximately 600 m (1,969 feet) by 300 m (984 feet) and remains open to the north and west toward the most significant portion of the magnetic anomaly. The rockchip-sampled trench described above is situated near the eastern tip of the magnetic and gold-in-soil anomaly, making the bulk of the coincident magnetic and gold-in-soil anomaly very prospective for additional gold mineralization. A copper-in-soil contour value of greater-than 100 ppm (parts per million) is partially coincident with the magnetic-high anomaly.

Roca's 235 km2 (92 sq. miles) FOREMORE Project is located in northwestern British Columbia approximately 45 km north of Barrick Gold Ltd.'s Eskay Creek Mine and 20 km east of NovaGold Resources Inc.'s Galore Creek Project. Assaying was completed by ACME Analytical Laboratories of Vancouver, BC. Drill core logging and sampling was conducted under the supervision of W.A. (Sandy) Sears, P.Geo., a qualified person under NI 43-101.


"David Skerlec"

David J. Skerlec - Chief Financial Officer

For further information contact the Company at:
Tel: 604-684-2900
Fax: 604-684-2902
Email: [email protected]

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

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