Metallurgical Tests of Gossan Hill Samples Show Excellent Gold and Silver Recovery

VANCOUVER, April 4, 2012 /CNW/ - Callinex Mines (TSX.V: CNX) (OTCQX: CLLXF) has received results from a metallurgical test program conducted on drill core samples from their Gossan Hill property. The test has determined that the gold contained in the sample appears to be relatively clean and amenable to basic mineral processing recovery methods. The test was performed to assess the preliminary recoverability of gold and silver using gravity, cyanidation and flotation methods. Among the most encouraging aspects of the final report submitted to the company are:

• Cyanidation and Flotation methods produced similar results in terms of gold recovery, however flotation showed significantly better recovery for silver.
• The cyanidation leach test recovered 83-88% of the gold, and 58-62% of the silver.
• The sulphide flotation test resulted in recoveries of 86-88% of the gold and 97% of the silver.
• The Bond ball mill work index indicates a "medium hardness ore" which suggests a 16.6 kWh/tonne rate of power usage in milling.

The Metallurgical test was conducted by Inspectorate Exploration and Mining Service of Richmond, BC on a sample consisting of a composite of 2011 drill core sample rejects that averaged 4.22g/t Au, and 12.57 g/t Ag, ground  from 154 to 80 microns.

The company considers this test to be a very encouraging step in the development of the Gossan Hill Project. In the context of the gold-bearing structure isolated during the 2011 drill program, and the strong early results from step-out drilling in the ongoing 2012 program, this metallurgical report bolsters the company's confidence in the Gossan Hill Project.

On Behalf of the Board of Directors,

J.J. O'Donnell

J.J. O'Donnell

President and COO

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

Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy 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 work programs and the timing and amount of expenditures. Callinex does not assume the obligation to update any forward-looking statement.

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