Astral Sources NL (ASX: AAR) (Astral or the Firm) is happy to report metallurgical take a look at outcomes for Hestia, Eos and Iris, a part of the 100%-owned Mandilla Gold Venture (Mandilla), situated roughly 70km south of Kalgoorlie in Western Australia (Determine 1).
HIGHLIGHTS
- Distinctive metallurgical traits of the Mandilla Gold Venture reconfirmed by current test- work undertaken on samples from the Hestia, Eos and Iris deposits.
- Metallurgical testing was accomplished below a variety of grind sizes and below very modest cyanide concentrations reflecting typical course of plant situations.
- Excellent outcomes had been achieved, with extraordinarily excessive gravity gold recoveries and really speedy leaching. At a 212µm grind dimension, the ultimate gold recoveries achieved after solely eight hours of leaching had been:
- For Hestia, 96.5% gravity restoration, 99.5% ultimate restoration;
- For Eos, 17.9% gravity restoration, 98.8% ultimate restoration; and
- For Iris,66.8% gravity restoration, 96.5% ultimate restoration.
- According to the outcomes achieved beforehand at Theia, Mandilla’s flagship deposit, metallurgical outcomes at Hestia, Eos and Iris reveal extraordinarily excessive gold recoveries, quick leach kinetics and low reagent consumptions.
- Turning to exploration, the primary section of an in-fill RC program at Theia has not too long ago been accomplished with 70 holes drilled for an combination 6,500 metres. The drill rig has relocated to the Feysville Gold Venture to undertake a 34-hole (3,750 metres) program to check for extensions to the Kamperman deposit.
- Seven out of the 34 holes have already been accomplished; encouragingly, the primary three holes, together with a 200-metre step-out to the north and the 2 most north-eastern step-outs, have all intersected important quartz and sulphide mineralisation which is a attribute of the lithologies which host mineralisation elsewhere at Kamperman.
- Mineral Useful resource estimations are presently underway for Suppose Huge, Rogan Josh and Kamperman – all at Feysville – and are anticipated to be reported later this month.
Astral Sources’ Managing Director Marc Ducler mentioned: “The distinctive metallurgical outcomes for Hestia, Eos and Iris proceed to spotlight the excellent metallurgical traits of the Mandilla Gold Venture. Usually, gold challenge research within the Jap Goldfields report preliminary metallurgical outcomes primarily based on 1,000ppm cyanide concentrations and 75µm grind sizes. The boldness within the Mandilla Gold Venture gained from prior research allowed us to efficiently take a look at a lot decrease cyanide ranges at a lot coarser grind sizes that might ship very low processing prices but nonetheless obtain sector-leading gold recoveries.
“Up to now, we’ve carried out 20 gravity and leach checks at Mandilla, with the gold remaining within the assayed tail averaging 0.02g/t Au. This demonstrates that the 95.7% gold restoration assumption used within the Scoping Examine, whereas thought-about excessive by business requirements, is doubtlessly conservative when contemplating the wonderful metallurgical properties being demonstrated at Mandilla.
“These new outcomes considerably de-risk Mandilla, confirming the flexibility to generate excessive gold recoveries in simply achievable, real-world processing plant situations.
“It will positively impression the metrics and economics of the Mandilla Gold Venture Pre-Feasibility Examine which is predicted to be accomplished within the June quarter 2025.
“I word that, within the Scoping Examine introduced on 21 September 2023, no contribution was included for Iris the place a Mineral Useful resource of 115koz is presently mapped. Nevertheless, in gentle of those metallurgical outcomes in addition to the rise in gold value because the Examine was launched, it’s anticipated that ore from Iris could also be included as a part of the Pre-Feasibility Examine.
“Turning to exploration, drilling actions are progressing nicely, with the most recent section of in-fill RC drilling at Theia accomplished. The drill rig has since been relocated to Feysville to finish additional extensional and in-fill drilling at Kamperman with seven holes already accomplished. Importantly, step-out holes as much as 200 metres additional north of the present recognized extents of gold mineralisation have intersected important quartz and sulphide mineralisation which has similarities in attribute to the lithologies which host gold mineralisation at Kamperman.
“With Mineral Useful resource Estimation work presently underway at Feysville, the crew has additionally taken the chance to refine the geological fashions for the Hestia and Eos deposits. Up to date MRE’s are actually anticipated later this month for Suppose Huge, Rogan Josh and Kamperman at Feysville, with Hestia and Eos to comply with later within the December Quarter.”
Determine 1 – Map illustrating location of Mandilla and Feysville Gold Tasks.
MANDILLA GOLD PROJECT
The Mandilla Gold Venture is located within the northern Widgiemooltha greenstone belt, roughly 70 kilometres south of the numerous mining centre of Kalgoorlie, Western Australia.
The realm hosts world-class deposits such because the Golden Mile Tremendous Pit in Kalgoorlie owned by Northern Star Sources Restricted (ASX:NST) and the St Ives Gold Mine south of Kambalda owned by Gold Fields Restricted, in addition to the substantial Beta Hunt Gold Mine owned by Westgold Sources Restricted (ASX:WGX).
Mandilla is roofed by present Mining Leases which aren’t topic to any third‐social gathering royalties aside from the usual WA Authorities gold royalty.
The Mandilla Gold Venture consists of the Theia, Iris, Eos and Hestia deposits.
Gold mineralisation at Theia and Iris is comprised of structurally managed quartz vein arrays and hydrothermal alteration near the western margin of the Emu Rocks Granite and domestically involved with sediments of the Spargoville Group.
Important NW to WNW-trending buildings alongside the western flank of the challenge are interpreted from aeromagnetic knowledge to chop via the granitic intrusion. These buildings are thought-about essential in localising gold mineralisation at Theia, which has a mineralised footprint extending over a strike size of greater than 1.6km.
A second sub-parallel construction hosts gold mineralisation on the Iris deposit. The mineralised footprint at Iris extends over a strike size of roughly 600 metres, combining with Theia to kind a mineralised zone extending over a strike size of greater than 2.2 kilometres.
At Eos, situated additional to the south-east, a comparatively shallow high-grade mineralised palaeochannel deposit has been recognized and which extends over a size of roughly 600 metres. A major gold supply can also be current with additional drilling required to find out each the character and structural controls on mineralisation and its extent.
Mineralisation delineated over roughly 800 metres of strike on the Hestia deposit, situated roughly 500 metres west of Theia, is related to a shear zone adjoining to a mafic/sediment contact, interpreted to be a part of the most important north-south trending group of thrust faults often known as the Spargoville Shear Hall.
Regionally, the Spargoville Shear Hall hosts the traditionally mined Wattle Dam gold mine (266koz at 10.6g/t Au) and, additional to the north, the Ghost Crab/Mt Marion mine (>1Moz).
The mineralisation at Hestia, which is current in a unique geological setting to bedrock mineralisation at Theia and Iris, stays open each down-dip and alongside strike.
In July 2023, Astral introduced a Mineral Useful resource Estimate (MRE) of 37Mt at 1.1 g/t Au for 1.27Moz of contained gold1 for the Mandilla Gold Venture.
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