ROCA - MAX Property Exploration Update



    ROK: TSX.V
    No. 05-08

    VANCOUVER, June 12 /CNW/ - Roca Mines Inc. (ROK: TSX-V) ("Roca" or "the
Company") provides the following update on exploration activities at the MAX
Property near Revelstoke, British Columbia.

    
    Summary

    -   Underground drilling results confirm new feeder zone and refine deep
        targets;
    -   Geological interpretation highlights multi-phase intrusive events and
        large-scale intrusions at depth;
    -   Surface exploration drilling has commenced on a biogeochemical
        molybdenum anomaly near the MAX Mine Portal area;
    -   Surface drilling to be conducted on a large-scale tungsten zone
        identified previously by others and significantly expanded by Roca in
        2006.
    

    Underground (2007) Final Drilling Results

    Five diamond drill holes totaling approximately 4,800 m were completed in
2007 (see Company's News Release dated February 7, 2008). All holes were
collared from a common underground drill station within the No.1 Adit, east of
the deposit currently being mined. The Company has now received final assays
for drill holes MX07-04 and -05.
    Results from the five holes have identified extensions to known
mineralization and indicate the potential for additional porphyry systems at
depth. As previously reported, hole MX07-03 drilled at -65 degrees on Mine
Section 8 below the eastern margin of the known resource, intersected a number
of narrow, well mineralized zones, interpreted to represent sub-vertical
feeders within a well recognized pre-, inter-, and post mineral structure
known as the "Z" Fault zone.
    The lower half of Hole MX07-03 (previously partially reported) and Hole
MX07-04, oriented along the lower southwest margin of the MAX deposit were
both variably mineralized over much of their lengths and will help to guide
future exploration but are not considered significant at this time.
    Hole MX07-05 oriented to test the area immediately adjacent on Mine
Section 9, shows that the narrow feeders coalesce into a larger cohesive
mineralized zone, open to depth and open laterally. This new zone extends some
200 m below the boundary of the known MAX resource and will be a focus of
further underground exploration drilling in the future.

    Core sampling of Drill Hole MX07-05 returned the following selected assay
results;

    
    -------------------------------------------------------------------------
    Drill Hole   From (m)     To (m)     Interval     Mo (%)     MoS(2)(%)
        No.                                (m)
    -------------------------------------------------------------------------
    MX07-05       136.0       307.0       171.0       0.104        0.17
    -------------------------------------------------------------------------
    Including     136.0       139.0         3.0       0.491        0.82
    -------------------------------------------------------------------------
    Including     207.0       211.5         4.5       0.286        0.48
    -------------------------------------------------------------------------
    Including     238.5       263.0        24.5       0.389        0.65
    -------------------------------------------------------------------------

    -------------------------------------------------------------------------
                  327.0       367.5        40.5       0.126        0.21
    -------------------------------------------------------------------------
    Including     357.0       367.5        10.5       0.329        0.55
    -------------------------------------------------------------------------

    Relative to the trend of the MAX Mine HG production zone, the true width
    of the drill intervals is estimated to be 30% of the intervals shown
    above.
    

    Roca's underground exploration drilling has thus far intersected strong
hydrothermal alteration, indications of several intrusive phases, and
significant multiple episodes of mineralization below the MAX deposit.
    Detailed petrographic studies by previous workers also concluded that
there are at least four intrusive pulses, and a highly repetitive mineralizing
event at MAX. The size of the inferred system is also significant. It is
estimated that a pluton at depth could have a diameter of roughly 1,000 m,
based on the width of the contact metamorphic aureole on surface, whereas the
intrusion at the centre of the deposit is roughly 200 m in diameter. This
suggests that the known deposit may have other zones and/or other deposits
that are not yet discovered.
    Indications of a larger intrusion at depth, significant molybdenite
intercepts in Holes MX07-03 and -05, as well as a repetitive mineralizing
event provide compelling evidence for additional porphyry mineralization below
the MAX deposit. Additional exploration drilling will be collared from new
locations within the mine workings in the future.
    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.

    Surface Exploration Drilling of Molybdenum and Tungsten Targets Commences

    Roca has mobilized a diamond drill to the MAX project to commence
exploration drilling on two primary surface targets on the MAX Property. The
targets are in close proximity to the MAX Molybdenum Mine but represent
potentially separate mineralized zones, including;

    1. A newly discovered surface molybdenum biogeochemical anomaly (150 m
X 350 m) centered approximately 500m west of the MAX mine portal area was
identified during a survey 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 geochemical sampling grid, and in an area of no previous drilling. The
biogeochemical survey also identified the surface expression of the MAX
deposit itself, providing confirmation of the potential success of this
targeting technique. An additional geochemical anomaly was discovered
approximately 350m southeast of the MAX deposit and a soil sampling grid will
be established at that location this summer.

    2. The Ridge and Upper Ridge Tungsten zones located approximately 1.2 km
southwest of the MAX mine portal area were most recently explored by others in
1979, including a total of three diamond drill holes. Of interest, drill hole
79-13 intersected 56 feet (17.3 m) of 0.395% scheelite (WO(3)) (see Company's
news release dated December 12, 2006). The tungsten area was significantly
expanded by Roca in 2006 when the Company's prospectors discovered scheelite
mineralization southeast of the Ridge Zone and hosted in low-sulphide,
garnet-rich skarn boulders and outcrop. With the addition of the Upper Ridge
Zone, the strike length of tungsten mineralization as indicated by all of the
outcrop sampled to date and encompassing all zones now totals 1,450 m in
length and extends over a vertical range of 600 m. Roca's initial drill
program will test the size and potential of this large mineralized and
near-surface zone.
    Tungsten is an essential metal, noted for its hardness and high-melting
point. It is used primarily in cemented carbide and high-speed steel tools for
the construction and mining industries and for general wear protection of
steel alloys. Like molybdenum, tungsten metal and concentrates are currently
trading at or near record high prices.
    Mr. 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: Doug Fosbrooke, Investor Relations, Tel: (604)
684-2900, Fax: (604) 684-2902, Email: info@Rocamines.com, Web:
www.Rocamines.com

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ROCA MINES INC.

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