- Utilizing standard gold recovery techniques has demonstrated an overall increased gold recovery rate of 86%,
- A conventional grind-flotation-regrind-CIL flowsheet continues to be the preferred process option
Cardinal's Project Manager, Bruce Lilford said:
"We are extremely pleased with the interim results as they continue to improve overall recoveries for Namdini. The test results thus far are demonstrating good lithological consistency, which will allow for predictable metallurgical performance in a production scenario.
Our Phase Two metallurgical test programme is focused on determining resource variability for our main lithology domains being metavolcanics, granite and diorite. The test programme was developed to enhance our metallurgical understanding in order to help ensure a robust process design.
Cardinal selected 16 separate life of mine drill holes as representative samples from the three main lithologies across the entire deposit. Each of the five metre downhole sample lengths were then composited by lithology for metallurgical testing.
The geostatistical resource model was used to target the average grade of the combined sample for each lithology, based on a notional cut-off grade of 0.4 g/t Au ("grams per tonne gold"). The intervals were selected to ensure that the following criteria were met:
- representative spatial distribution within the overall Namdini gold deposit,
- a range of gold grades, predicted to be encountered during normal mining operations, and
- average gold grades matching the overall Namdini geostatistical resource model above a 0.4 g/t Au cut-off
In addition to the drill holes noted above, the Company is conducting additional tests for the anticipated starter pit area. This supplemental metallurgical testing is still in progress.
As the metallurgical testing advances in the project development phase, the process flowsheet will continue to be optimized in order to provide the necessary detailed design criteria."
Cardinal's CEO / MD, Archie Koimtsidis said:
"This round of interim metallurgical results has clearly demonstrated good opportunity for higher gold recovery. We anticipate further confidence and improvement in overall gold recoveries as we continue our metallurgical test programmes."
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About Cardinal Resources Ltd
The Company’s Namdini Project has a declared 4Moz Maiden Gold Resource which is open. The Company is focused on the development of the Namdini project through a resource expansion drilling programme, prefeasibility studies, detailed metallurgical test work and process flowsheet studies. Exploration activity is also underway on the Company’s Bolgatanga and Subranum Projects.
Cardinal Resources Ltd