26/03/2024
Tennant Minerals today announced initial results of metallurgical test-work on diamond drill core samples from the high-grade Bluebird - discovery in the Northern Territory. The metallurgical test-work was undertaken to determine overall copper and gold recovery parameters for typical mineralisation seen in shallow and deeper copper-gold bearing intersections, enabling the Company to determine the optimal extraction process for the Bluebird mineralisation.
• The results showed that up to 97% of the copper and 66% of the gold can be extracted via conventional flotation, delivering a concentrate grading 23% copper (Cu) and 1.5 g/t gold (Au).
• The flotation upgrade represents a 10-fold increase in copper and a 4-fold increase in gold concentration from the diamond drillhole intersection in BBDD0045 of 61.8m @ 2.3% Cu, 0.4 g/t Au including 13.2m at 9.6% Cu, 1.51 g/t Au.
• Separate (Falcon) gravity concentration test-work conducted on the master composite sample (BB_45_1) showed a 3-fold increase in gold concentration recovering 32.6% of the gold and 15.7% of the copper. Intense cyanidation leaching of the gravity concentrate was able to extract 90.2% of the contained gold recovered in the gravity circuit. Further work will explore further gravity concentration and leaching stages, in conjunction with flotation, to potentially increase overall gold recovery.
CEO Vincent Algar commented:
“The significant initial copper flotation results with 23% copper and 1.5 g/t gold in concentrate, and the high copper recoveries of up to 97%, are extremely encouraging and indicate potential for positive outcomes from future economic studies into mining and extraction to produce a saleable copper and gold concentrate.
“Copper with gold concentrates of this grade are potentially economic at current copper and gold prices, and provide the Company with a strong incentive to continue drilling, advance metallurgical test-work and define a maiden Mineral Resource.
“We look forward to launching our next drilling program to define and extend the enlarged mineralised footprint as we progress plans to establish a stand-alone mining and processing operation to capitalise on the resurgent global demand for copper and gold.”
Full announcement: https://bit.ly/4aaHXiw