Roca - Drilling results at Nuevo/Once Bocas target

TSX-V: ROK

VANCOUVER, April 13 /PRNewswire-FirstCall/ - Roca Mines Inc. (TSX-V: ROK) ("Roca" or "the Company") has received final assay results from a single drillhole at the Once Bocas target at the Nuevo Milenio silver-gold project. The project is located near Tepic in the state of Nayarit, Mexico.

Drilling Highlights:

    -   Drillhole NM-10-05 intersected several intervals of silver-gold
        mineralization at Once Bocas, returning a near-surface interval of
        12.19 m averaging 90.9 g/t Ag and 0.496 g/t Au (including 2.49 m
        grading 379.6 g/t Ag and 2.238 g/t Au), two intermediate intervals,
        and a lower 4.07 m interval averaging 114.5 g/t Ag and 0.311 g/t Au;
        and,

    -   Once Bocas has had very limited drilling to date, however the recent
        results highlight mineralization extends beyond discreet veins and
        into appreciable zones of altered wallrock, locally containing quartz
        stockworks and sheeted veinlets.

Once Bocas Zone

Once Bocas is a broad, moderate to intense argillic alteration zone that includes numerous well-developed quartz stockworks and several discrete veins. The zone has a minimum strike length of 350 m, its vertical dimension is more than 150 m and its width at surface is approximately 100 m. Additional surface showings to the northwest and southeast along strike suggest that the Once Bocas zone could have an overall strike length well in excess of 1,000 m.

Drillhole NM-10-05, a twin of DDH-06-03, was collared on the central part of the known Once Bocas zone, 550 metres west-southwest of drillhole NM-10-01. Hole NM-10-05 successfully cut the zone returning multiple intersections of low-grade silver-gold mineralization within which high-grade silver-gold veins occur. The following table compares previous sample intervals and assays with those from drillhole NM-10-05 of the 2010 program.

Table 1: Comparison of DDH-06-03 and NM-10-05 (Once Bocas)

    -------------------------------------------------------------------------
    Drill Hole      From (m)     To (m)   Interval (m)  Ag (g/t)   Au (g/t)
    -------------------------------------------------------------------------
    DDH-06-03           18.00       30.00       12.00       109.6      1.170
    -------------------------------------------------------------------------
      including         26.00       28.00        2.00       471.7      5.479
    -------------------------------------------------------------------------
            And        132.00      146.00       14.00        18.7      0.135
    -------------------------------------------------------------------------
            And        186.00      188.00        2.00        46.0      0.136
    -------------------------------------------------------------------------
    NM-10-05            18.30       30.49       12.19        90.9      0.496
    -------------------------------------------------------------------------
      including         25.61       28.10        2.49       379.6      2.238
    -------------------------------------------------------------------------
      including         26.55       28.10        1.55       568.2      3.327
    -------------------------------------------------------------------------
            And        108.23      112.80        4.57        27.3      0.174
    -------------------------------------------------------------------------
            And        125.00      134.15        9.15        40.6      0.110
    -------------------------------------------------------------------------
      including        131.10      134.15        3.05        92.2      0.128
    -------------------------------------------------------------------------
            And        245.93      250.00        4.07       114.5      0.311
    -------------------------------------------------------------------------
      including        246.95      248.48        1.53       227.0      0.713
    -------------------------------------------------------------------------

Nuevo Milenio Geologic Setting

Nuevo Milenio is a low-sulphide epithermal camp that is hosted by a sequence of intermediate to felsic volcanic flows, tuffs and breccias within a large collapsed caldera setting. The three principal northwest-trending vein systems on the property are Dos Hornos-Veta Tomas, Once Bocas and Chacuaco-Cafetal. Previous exploration drilling defined the Dos Hornos-Veta Tomas system over a strike length of approximately 1300 m and the Once Bocas system over a strike length of 350 m. Surface exploration and drilling has indicated that the systems are open in all directions.

The Company is currently reviewing its recent exploration results in context with historic information collected by Cream Minerals Ltd. Updated geological maps and sections are being prepared and a summary of that review and near-term exploration plans at Nuevo Milenio will be described shortly in a news release.

All diamond drilling for the program has been carried out by Falcon Perforaciones Mexico, S.A. de C.V. All assaying has been conducted by ACME Analytical Laboratories of Vancouver, BC. Samples were analyzed for 36 elements using four-acid digestion ICP-ES and for gold and silver using fire assay fusion with ICP-ES finish. Over-limits for gold and silver were re-assayed using a gravimetric finish.

Bob Lane, P.Geo is the 43-101 qualified person responsible for the supervision of the drilling and sampling program and the preparation of this news release.

                               ROCA MINES INC.

                              "Scott Broughton"

                --------------------------------------------
                   Scott E. Broughton - President and CEO

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

SOURCE Roca Mines Inc.

Copyright l 13 PR Newswire