Legacy Minerals Ltd (ASX:LGM) has achieved gold, silver, copper, lead and zinc recoveries described as "outstanding" in initial metallurgical test-work using a relatively simple flotation process on samples from Mt Felsted Prospect within the Bauloora Project in central New South Wales.
Samples were taken from drill holes 240 metres apart and results indicate the potential for high-quality concentrate product.
Mt Felstead, which is 10 kilometres northwest of Cootamundra, is the first of several high-priority target areas to be drill tested at Bauloora.
Cumulative rougher concentrates 1-3 returned recoveries of:
- semi-massive sulphides - 99.6% silver, 93.6% gold, 99.1% copper, 98.9% lead and 99.2% zinc;
- massive sulphides - 98.1% silver, 84.1% gold, 95.5% copper, 98.1% lead and 98.4% zinc; and
- veined - 92.9% silver, 87.1% gold, 89.3% copper, 89.4% lead and 94.5% zinc.
Cumulative rougher concentrates 1-3 returned grades of:
- semi-massive sulphides - 1,555 g/t silver, 13.2 g/t gold, 41.8% lead and 21.1% zinc;
- massive sulphides - 184 g/t silver, 14.5 g/t gold, 24.2% lead and 33.0% zinc; and
- veined - 130 g/t silver, 13.0 g/t gold, 17.3% lead and 41.5% zinc.
“Outstanding recoveries”
Legacy sent three metallurgical samples to be analysed by ALS Ltd, including separate representative samples of massive, semi-massive and veined sulphide mineralisation from the Mt Felstead Prospect, which returned mineral grades and recoveries of the samples.
“Off the back of the high-grade gold-silver and base metal drilling results at Mt Felstead Prospect, it is exciting to build on the potential of Bauloora with these outstanding metallurgical recoveries,” said Legacy managing director Christopher Byrne.
“The metallurgical testing gives Legacy Minerals evidence that metals of value can be recovered through an economically viable industry-standard processing route.
"Work is ongoing across the wider Bauloora Project (with) the soil geochemistry program underway. Legacy Minerals is fully funded to drill test emerging targets across the project, and we look forward to keeping our shareholders updated on the results," he added.
As the project develops, the company plans to investigate if separate concentrate products for the minerals can be produced using gravity separation, leaching and the same floatation process.
Next steps
Soil geochemistry surveys are underway across the northern extent of the Bauloora anomalous gold zone.
Results from the soil program, geological mapping conducted and recently completed gradient array induced polarisation will be analysed and drill targets refined for testing this year.