A recent hole drilled by Azco Mining (VSE) on the Piedras Verdes copper project returned 440 ft. grading 0.71% copper from 0-444 ft., the best result encountered so far in the current drilling program.
Situated in southern Sonora, Mexico, Piedras Verdes is one of three large copper-oxide projects owned 100% by Azco that will use the low-cost solvent extraction and electrowinning copper leach and recovery process. Azco reported results from the first 12 holes of its definition drill program on the Piedras Verdes deposit, including the aforementioned hole drilled near the centre of the deposit.
Two holes drilled in the deposit’s leached oxide cap returned 100 ft. of 0.95% copper from 210-310 ft., and 130 ft. of 0.43% copper from 190-320 ft. The average of the results from the 12 holes is 252 ft. grading 0.49% copper. Azco recently started a second-phase drill program of 32 holes which is designed to confirm the continuity of the mineralization, further determine the shape and extent of the deposit, and verify the copper grades and mineralization encountered in the first-phase trenching (as well as drilling carried out by previous operators).
Azco notes that its drilling and trenching suggest copper values higher than those originally encountered by Cominco and other companies where a resource of 150 million tons was estimated with an average grade of 0.33% copper. The previous operators carried out 27,000 ft. of drilling in 84 holes, and Azco believes the reason for the discrepancy in the copper values may be due to incomplete sample recoveries in the past.
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