ROCA - Drilling Intersects New Molybdenum Zone at MAX and Drilling Commences at Foremore VMS-Gold Project

    ROK: TSX.V

    VANCOUVER, Aug. 12 /CNW/ - Roca Mines Inc. (ROK: TSX-V) ("Roca" or "the
Company") reports that a possible new molybdenum system has been discovered in
close proximity to the recently completed Adit No.2 at the MAX Molybdenum
    Drilling targeted a molybdenum biogeochemical anomaly with a surface
footprint of 150 metres (m) X 350 m and centered approximately 200 m north of
Adit No.2. Two initial holes intersected a wide zone (over 100 m) of intense
silicification, hornfelsing, locally strong quartz veining and pervasive
sericite alteration with trace molybdenite throughout. Further diamond
drilling is planned from the Adit No.2 area to test for a separate molybdenum
deposit on the east side of the Z Fault, or a faulted extension of the MAX
deposit itself.
    While economically significant molybdenum values were not intersected the
geologic and near-surface expression of this new zone is reminiscent of the
MAX resource itself where the extent of a relatively minor molybdenite
mineralized zone on surface lies atop a large-scale mineralized deposit
currently being mined.
    The anomaly was identified during a survey funded and conducted by the
Geological Survey of Canada's (GSC) Targeted Geoscience Initiative - 3 (TGI-3)
in late 2007. This anomaly was not previously identified because it lies
beyond the historical limits of a soil-sampling grid and in an area without
previous drilling. A second geochemical anomaly was also discovered
approximately 350m southeast of the MAX deposit and a soil-sampling grid will
be established at that location to further define that target before drilling.
    Sampling and logging of the drill holes was conducted under the
supervision of David Melling, P.Geo., a qualified person as defined by
NI43-101. The sampling program included quality control procedures, in
addition to internal quality control at the assay laboratory, ACME Analytical
of Vancouver, BC an ISO 9001:2000 accredited laboratory.

    Foremore Drilling Commences

    The Foremore VMS-Gold (volcanogenic-massive-sulphide/gold) project is
located in northwestern British Columbia, 45 kilometres north of Barrick
Gold's Eskay Creek mine and 45 kilometers west of Hwy 37, mid-distance along
the road route to the large-scale Galore Creek project, being developed by
NovaGold Resources Inc. and Teck Cominco Ltd. Construction is currently
underway on the access road, which passes within 500 m of Roca's camp.
    Roca has previously completed prospecting, mapping, drilling and an
airborne survey of parts of the 100% owned property. Interpretation of the
airborne survey and all previous exploration data has led to the
identification of a number of priority drill targets at several locations on
the property, including the North More Creek VMS corridor, and the Hanging
Valley / SBF area.

    North More Creek VMS Corridor

    At the Ryder Area, VMS mineralization occurs as bands of massive sulphide
within a large envelope of intense alteration (including sodium depletion),
and massive sulphide mineralization in a thick (+200m) rhyolite sequence below
a basalt contact. Compilation of data from widely spaced drill holes indicate
that the mineralization/alteration is localized along a NE-SW trend, traced
over 1 km strike length, and open with grades increasing to the SW. Initial
drilling will include step outs from previous massive sulphide intersections
along this corridor.
    At the BRT area, three-dimensional modeling of drill hole data indicates
that the gold & silver enriched massive sulphides, hosted in altered basalt
above the More Creek rhyolite, occur in a flattened pipe like body that is
open to depth below hole 03-04 (2.1m @ 22.8g/t Au, 1,561g/t Ag, 9.3%Pb/Zn, and
hole 03-11 (4.3g/t Au, 56g/t Ag). Further drilling is planned to test this
zone down plunge.

    Hanging Valley / SBF Area:

    The South Boulder Field (SBF) is comprised of banded massive sulphide &
magnetite boulders, many of which are angular, up to 2 metres in size and
characterized by intense ankerite/dolomite alteration. In excess of
800 massive sulphide boulders were originally discovered by Cominco in the
late 1980s. Cominco's assay results of 53 mineralized boulders at this
location averaged 9.4 per cent zinc (Zn), 1.7 per cent lead (Pb) and 102 grams
per tonne (g/t) silver (Ag). These results are reported in a 43-101 compliant
technical report on the Foremore project prepared by W.A. Sandy Sears, P.Geo.,
and John J. Watkins, P.Geo., dated April, 2005.
    Helicopter Airborne Magnetic surveys show several distinct anomalies,
including one with a coincident multi element soil geochemical anomaly, in an
area with very limited outcrop exposure and located immediately up-ice from
the boulder fields. Geological mapping has identified lithologies and
alteration similar to that hosting the massive sulphide boulders, and a
detailed Induced Polarization survey is now in progress to further refine
targets for drilling this year.

    Scott Broughton, P.Eng. is the qualified person responsible for the
preparation of this news release.

                               ROCA MINES INC.
                              "Scott Broughton"
                 Scott E. Broughton, P.Eng. - President & CEO

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

    %SEDAR: 00018660E

For further information:

For further information: Investor Relations, Tel: (604) 684-2900, Fax:
(604) 684-2902, Email:, Web:

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