Mirasol reports successful initial metallurgical test results on high-grade vein/breccia, Virginia silver project

Friday, Feb 08, 2013

Mirasol Resources Ltd. (TSXV: MRZ), (Frankfurt: M8R)  ("Mirasol") announces initial results of a program of metallurgical test work at the 100%-owned Virginia Silver Project located in Santa Cruz Province, Argentina.  The test program was designed to determine how silver can be recovered from mineralized drill core sourced from the Julia and Naty veins at the Virginia Project (news release of June, 2012). Representative drill samples of the high-grade vein and breccia-vein material were composited separately from the surrounding halo of low-grade mineralization, and were tested separately.

Test results to a scoping level show that the vein/breccia mineralization can be processed using standard industry technologies with silver recoveries from 75% to 81%, through both agitated leaching and sequential flotation/leaching methods.

Tests on the low-grade halo material, which surrounds high-grade vein and vein/breccia, have not responded in the same way, and to date have not resulted in potentially economic recoveries. Mineralogical test work is underway to investigate the host minerals for silver in the halo, with the goal to increase the recoveries of the low-grade halo.

"Test work shows the high-grade vein/breccia, the material which contains the majority of the silver present in the Virginia silver vein system, has good silver recoveries using proven, low risk technologies.

This is a major step forward for the Virginia Project." said Mary Little, Mirasol's President and CEO.

Technical Details

A master composite and individual composites of vein/breccia material were prepared from samples taken from 34 representative drill holes from the Julia North, Julia Central, and Naty veins. Fifty previously-assayed, individual intervals of samples representing 53.1 metres of core with a total weight of 100.2 kilos, and were composed from sample reject material. In the case of Julia North, an additional composite was made from 18 quarter-core samples representing 14.7 metres with a total weight of 51.4 kilos.

SOURCE Mirasol Resources Ltd.