Vancouver — Calgary-based
Reverse-circulation hole 2 returned an average grade of 1.3% copper, 1.07% zinc and 27 grams silver per tonne over 112.78 metres, including 48.78 metres grading 1.81% copper, 0.14 gram gold, 22 grams silver and 2.03% zinc in the main mineralized skarn breccia and associated endoskarn complex. The hole ended in mineralization.
A previous hole, no. BAH-15, returned 143 metres with an average grade of 0.71% copper from 16 to 159 metres, followed by 5.6 metres grading 2.15% copper, 0.24 gram gold, 31 grams silver and 0.62% zinc from 160.7 to 166.3 metres, where the hole ended in mineralization.
Selected results from other recent holes include: 45.7 metres of 0.92% copper and 25.9 metres of 0.60% (both within the chalcocite blanket) and 12.6 metres of 0.77% copper and 19.8 metres of 0.53% copper (from sediments/breccia).
Tyler began exploring Bahuerachi in 1993, when it acquired the project as a near-surface, potentially heap-leachable copper oxide deposit. Work has focused on the Main zone, now outlined at surface for more than 4,000 metres of strike length, with widths varying between 200 and more than 700 metres.
Three distinct but related domains of mineralization have been identified. The first consists of low-grade copper mineralization in an enriched oxide blanket within rocks hosting the main intrusive complex. The second consists of extensive, high-grade breccia and skarn complexes on the fringe of the main porphyry, while the third consists of low-grade stockwork and the mineralized intrusive porphyry.
While the porphyry offers the best potential for a bulk-tonnage deposit, the company says it will take “a stepped and cautious approach” to future exploration because large systems of this type often contain ore-grade shells within envelopes of sub-economic mineralization.
The property hosts other exploration targets that remain to be tested, including a large geophysical conductor and several mineralized occurrences.
The company is also twinning a previous core hole to assess the variability of grades between core and reverse-circulation drilling, as it believes there is a possibility that some previously reported reverse-circulation holes understate the true grade, owing to the loss of fines during the recovery process. The company notes, however, that the results for these holes are still within the range of values expected for the areas drilled.
Core and reverse-circulation drilling are continuing on the property, with more results expected by mid-to-late February.
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