Snow Lake Program Completed, Coles Creek to Begin

Jun 11, 2010, 16:59 ET from Callinan Mines Ltd.

VANCOUVER, June 11 /PRNewswire-FirstCall/ - Callinan Mines has completed this winter season's drilling on its properties in the Snow Lake area of Manitoba. Drilling was conducted on the Jean Lake, Berry Creek and Watts River properties to test for gold, copper and zinc mineralization in targets located by geophysics, and various methods of surface prospecting.

A total of seven holes were drilled in the Jean Lake program. Gold mineralization which was encountered is most often associated with arsenopyrite in various forms of altered diorite, granodiorite and tonolite, in some cases containing garnet crystals. It is noted that

higher gold values occur where higher instances of arsenopyrite are observed.

Assays from Watts River, Berry Creek, and the remaining five holes from Jean Lake are currently being processed and logged. Results from Jean Lake processed to date are as follows:

    DDH JEAN 1

        From (m)           To (m)             Width (m)          Au gm/Mt
        --------           ------             ---------          --------
         201.66            202.3                0.64                3.9
         288.3             291.2                2.9                 1.33

    DDH JEAN 2

        From (m)           To (m)             Width (m)          Au gm/Mt
        --------           ------             ---------          --------
           8                14.3                6.8                 0.765
          62.6              65.2                2.4                 1.2
          77.2              82                  4.8                 0.503
         168.5              183                14.5                 0.23

Operations are due to begin on Callinan's Coles Creek property in British Columbia in the month of July. Work will include the diamond drilling of an induced polarization anomaly located in last year's program near mineralization previously located in DDH COLE 18. This diamond drill hole, completed as part of the 2008 diamond drill program, contained a 4.7 meter intersection of material grading 200 grams of silver per tonne included in a larger width of 141 meters of mineralization containing 20.5 grams of silver per tonne. The mineralization is in a volcanic debris flow.

Callinan Mines maintained a QA/QC program at all stages of exploration. Core recovery was calculated, measured and observed at a company facility in Snow Lake before being cut at the same facility. Core was cut in half, one half being returned to the core tray for storage and the other half placed in pre-labeled plastic bags, tagged with the sample number and recorded in the log. A gold standard, packed with predetermined gold values was inserted with every 30 samples. A blank standard, a rock with low gold values, was also inserted. Samples were then shipped to Acme Analytical Laboratories in Vancouver, BC, where they were crushed, pulverized and sieved into approximately 500 g samples, +150 and -150 mesh, saved and split. Metallics were then weighted and samples assayed using fire assay. The lab employs internal quality control by assaying pulp duplicates and inserting a quality control standards of predetermined gold values and a blank sample.

On Behalf of the Board of Directors,

"Mike Muzylowski"

Mike Muzylowski

All of Callinan's exploration programs are conducted under the direction of Pat Deveaux, P.Geo, a qualified person as defined by national instrument 43-101, who has reviewed and approved the contents of this release.

Some statements in this news release contain forward-looking information. These statements include, but are not limited to, statements with respect to future expenditures. These statements address future events and conditions and, as such, involve known and unknown risks, uncertainties and other factors which may cause the actual results, performance or achievements to be materially different from any future results, performance or achievements expressed or implied by the statements. Such factors include, among others, the ability to complete contemplated private placements and the timing and amount of expenditures. Callinan does not assume the obligation to update any forward-looking statement.

SOURCE Callinan Mines Ltd.