Large-column copper leaching tests are under way in Tucson, Ariz., on 6-inch-diameter core drilling samples from the wholly-owned Mariquita copper project in Mexico, Cominco Resources International (TSE) reports.
The test work is to be completed during the second quarter, along with other metallurgical and engineering studies for a proposed
25-million-lb.-per-year cathode copper operation.
Elsewhere in Mexico, the company says, a 4,000-metre drilling program designed to search for more high-grade ore was begun at the end of January at the Maria .NB3
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