Austral's Flying Horse asset Qld

Austral Resources continues to rein in positive results at Flying Horse

Austral Resources Australia (ASX:AR1) reports assay results from drilling at Flying Horse, a copper sulphide resource at Mt Kelly in Queensland includes 14m @ 2.23% Cu, 11m @ 2.30% Cu, and 19m @ 1.69% Cu.

The copper producer reports that Flying Horse, which is located on an existing mining lease (ML5447), contains a JORC Mineral Resource Estimate of 14.2 million tonnes at 0.77% Cu.

As previously announced, Austral Resources completed a three-hole diamond drilling program for a total of 712m at Flying Horse to provide fresh ore samples for a metallurgical test work program.

This program is evaluating the suitability of Mt Kelly sulphide (chalcopyrite) mineralisation for an emerging sulphide heap leach SX-EW technology.

if the evaluation is positive, there is ‘exciting potential’ for Austral to have an additional processing solution

Austral Resources announces that if the evaluation is positive, there is ‘exciting potential’ for Austral to have an additional processing solution relative to conventional flotation for its sulphide resource base of 26.5Mt@ 0.8% Cu.

Drilling results to date have verified the current geologic resource model and the targeting strategy applied with outstanding results.

Significant intersections include:

  • MTKD010 19m @ 1.69% Cu (from 66m downhole)
  • MTKD081 14m @ 2.23% Cu (from 122m downhole), and 11m @ 2.3% Cu (from 146m downhole)

Austral Resources is completing acid consumption testing on samples from the composite that are representative of the range of grades.

Results from the acid consumption testing is expected no later than mid-August.

Dependent upon the results from the acid consumption testing, the composite will then be air-freighted to the laboratory in Arizona US for further evaluation.

Further work includes completion of the program to evaluate the suitability of Mt Kelly sulphide (chalcopyrite) mineralisation for an emerging sulphide heap leach SX-EW technology.

This ongoing evaluation of Flying Horse is a further step in assessing the potential to begin commercialising Austral’s 210,000t of contained copper in sulphides (26.5Mt @ 0.8% Cu) to augment the company’s current 40,000t Anthill Mine copper production from the Anthill copper oxide mine.

Austral is an ASX-listed copper cathode producer operating in the Mt Isa region,  Queensland, Australia. Its Mt Kelly copper oxide heap leach and solvent extraction electrowinning (SXEW) plant has a nameplate capacity of 30,000tpa of copper cathode. Austral has developed its Anthill oxide copper mine which has an Ore Reserve of 5.06Mt at 0.94% Cu.

The company expects to produce 40,000t of copper cathode over a four-year period from mid-2022.

Austral also owns a significant copper inventory with a JORC compliant MRE of 60Mt @ 0.7% Cu (420,000t of contained copper) and 2,100km-square of highly prospective exploration tenure in the heart of the Mt Isa district, a ‘world-class’ copper and base metals province.

It is implementing an intensive exploration and development programme designed to extend the life of mine, increase its resource base and then review options to commercialise its copper resources.

Images: Austral Resources Australia Ltd
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Written By Adam Orlando
Mining.com.au Editor-in-Chief Adam Orlando has more than 20 years’ experience in the media having held senior roles at various publications, including as Asia-Pacific Sector Head (Mining) at global newswire Acuris (formerly Mergermarket). Orlando has worked in newsrooms around the world including Hong Kong, Singapore, London, and Sydney.