Metallurgical testing recovers 90pc of WA gold for | Australian Markets

Brightstar Assets has recovered an spectacular whole of more than 90 per cent of gold in definitive feasibility study-level testwork on the valuable steel discovered at Cork Tree Nicely, which is an element of the company’s wider Laverton project in gold-rich Western Australia. A high-gravity gold content material up to 60pc was additionally achieved.

The metallurgical testing on mineralisation from Brightstar’s Delta and Cork Tree Nicely North initiatives returned extraordinarily high recoveries of up to 98pc from its dolerite-hosted oxide and transitional materials. Testwork on recent rock produced up to 95pc restoration. A minimal of 90pc was recovered from all three supplies.

Testwork carried out on Cork Tree Nicely South’s sediment-hosted mineralisation returned 91pc-96pc on recent chert and 90pc-94pc on recent shale.

The higher restoration ranges have been achieved with an equivalent grind dimension over a 48-hour leach time, as a substitute of 24 hours for the decrease ranges of restoration.

All testwork was accomplished by unbiased metallurgical consultants engaged for the project’s upcoming definitive feasibility examine and was based mostly on the company’s processing flowsheet.

Testing used a easy and traditional carbon-in-leach circuit optimised on achieved outcomes utilizing materials from particular diamond holes drilled for the metallurgical program final yr.

In an added constructive, low ranges of deleterious parts offered minimal impression to restoration ranges throughout all rock sorts. Copper, antimony, tellurium and non-carbonate carbon have been thought-about low and had a negligible impact on gold recoveries.

Testing of grasp composite samples from Cork Tree Nicely returned a gold head grade from 1.88 grams per tonne (g/t) to five.58g/t, with low arsenic head grades and low ranges of sulphur.

The outcomes from our testwork program have confirmed that Cork Tree Nicely recovers exceptionally properly throughout all rock sorts and oxidation states. Materials feeding the testwork packages was from our 2024 diamond drilling program, with complete leaching and comminution testwork being assessed by our DFS metallurgical consultants IMO.

Brightstar says testwork continues on materials from the Girl Shenton deposit in Menzies and the Fish and Lord Byron deposits at Jasper Hills, about 50 kilometres southeast of the company’s processing plant.

A reverse circulation drilling program is being expedited to infill dolerite-hosted mineralisation at Delta and check high-grade plunging lodes under the historic shallow pits.

Administration says ongoing technical work is progressing properly for its upcoming definitive feasibility examine and it’s pushing forward with the development of mining operations at its Jasper Hills project, together with haul street signage upgrades because it prepares to shortly haul ore from historic low-grade stockpiles.

The company has an present mineral useful resource of 303,000 ounces of gold on the Cork Tree Nicely deposit.

The metallurgical testwork is shifting the project nearer to definitive feasibility examine completion amid roaring gold costs – which have moved the needle up 43pc throughout the previous yr and captured the eye of market speculators and traders.

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