Galileo Mining (ASX:GAL) Recovers Up to 85% Palladium and 94% Copper in Callisto Flotation Tests

Sonal Goyal

28 October 2026 01:09 PM AEDT

Galileo Mining (ASX:GAL) Recovers Up to 85% Palladium and 94% Copper in Callisto Flotation Tests

Image Source: Shutterstock

You are reading a free article with opinions that may differ from the recommendation given by Kalkine in its paid research reports. Become a Kalkine member today to get access to our research reports, in-depth technical and fundamental research. Learn more

Start Your Free Trial Now!

Key Highlights

Flotation tests on Callisto diamond core recovered up to 85% of palladium and up to 94% of copper.
Seven tests were run on a 12-metre composite from hole 26NRDD525 at grinds of 98 and 75 microns.
Aircore drilling totalling 3,568m at North Callisto, along strike and at South Callisto is complete, with assays due in about six weeks.
An RC program of around 2,000m is scheduled at Mission Sill from early November, targeting two zones over 1.4km and 2km.

Galileo Mining Ltd (ASX:GAL) has reported metallurgical results from its Callisto palladium-copper deposit at the wholly owned Norseman project in Western Australia, with conventional flotation recovering up to 85% of palladium and up to 94% of copper from diamond drill core. The company also confirmed that aircore drilling north and south of the 17.5 million tonne Callisto resource has finished, and that reverse circulation drilling at the Mission Sill prospect is scheduled to begin in early November.

Flotation Tests on Callisto Core

ALS Metallurgy Pty Ltd carried out the test work on a single bulk composite taken from a continuous twelve-metre interval between 147 and 159 metres in diamond hole 26NRDD525, within the disseminated sulphide zone. The composite assayed 2.05 g/t palladium, 0.43% copper, 0.39% nickel, 0.32 g/t platinum and 0.10 g/t gold. Seven flotation tests were completed, four at a coarser grind of p80 of 98 microns and three at a standard p80 of 75 microns, using different reagent combinations.

Palladium recovery ranged from 79.0% to 85.1% across the tests, with the 85.1% result coming from the 98-micron grind and a concentrate grade of 18.1 g/t palladium. Copper recovery reached 94.2% in the first test at 98 microns, which graded 2.79% copper, and was 93.7% to 93.9% in two of the 75-micron runs. Nickel recoveries sat between 69.0% and 75.1%, platinum between 70.6% and 76.4%, and gold between 71.1% and 81.6%. Galileo noted that further work is needed to examine how grind size relates to recovery, since grind size affects energy consumption.

The company said the response of the sample to standard flotation supports its expectation that other sulphide discoveries in the district would behave in a similar way, citing consistent geology along 20km of prospective strike around Callisto and 12km at Mission Sill. The Callisto resource stands at 17.5 million tonnes at 1.04 g/t 4E, 0.20% nickel and 0.16% copper, equal to 2.3 g/t palladium equivalent.

Aircore Drilling at North and South Callisto

An aircore program has been completed over the North Callisto prospect, where rock chip sampling 2 kilometres north of the resource returned up to 1.87 g/t 3E. Reconnaissance aircore holes were also drilled further north along strike in areas without earlier drilling, and a new gold prospect at South Callisto was tested. The three areas together account for 3,568 metres of drilling, and assay results are expected in approximately six weeks. Aircore drilling tests near-surface weathered rocks for geochemical anomalism, and the North Callisto target was first identified from surface sampling reported on 22 July 2026.

Mission Sill RC Program

A reverse circulation program of around 2,000 metres is scheduled to start in early November at Mission Sill. Aircore drilling announced on 10 August 2026 showed mineralisation on every line drilled, and exploration is now focused on two zones of platinum group metal anomalism, Zone A over 1.4km and Zone B over 2km. Limited RC drilling in December 2025 established shallow sulphide mineralisation within both zones, and the new holes will test those zones down dip and along strike. Earlier intercepts include 8m at 0.42 g/t 3E from 24m in NRC518, 17m at 0.36 g/t 3E from 84m in NRC519 and 16m at 0.27 g/t 3E from 88m in NRC513.

Where the Norseman Program Stands

Galileo holds 100% of the Norseman project, which covers 255 square kilometres of tenure and includes Callisto, Jimberlana and Mission Sill. The test work places recoveries of up to 85% palladium and 94% copper on record for Callisto core, with aircore drilling finished and RC drilling at Mission Sill due to commence in November.

FAQs

Q: What recoveries did Galileo achieve at Callisto?

A: Flotation tests recovered up to 85.1% of palladium and up to 94.2% of copper. The best palladium result came from the coarser 98-micron grind.

Q: How was the metallurgical sample selected?

A: It was a bulk composite from a continuous 12-metre interval between 147 and 159 metres in diamond hole 26NRDD525. The interval sits within the disseminated sulphide zone.

Q: How much aircore drilling was completed?

A: A total of 3,568 metres was drilled across North Callisto, reconnaissance areas along strike and the South Callisto gold prospect. Assays are expected in about six weeks.

Q: When does RC drilling start at Mission Sill?

A: The program of around 2,000 metres is scheduled to begin in early November. It targets Zone A over 1.4km and Zone B over 2km.

Download Free Report – Explore 3 Stock Ideas & Industry Insights

Unlock 3 stock ideas and key industry insights in our free report. This information is general in nature and does not consider your personal objectives, financial situation, or needs. It is not financial advice.

All investments involve risk—consider independent advice before making any investment decisions.

View 3 Research Reports

Disclaimer:

This article (“Article”) has been prepared by Kalkine Pty Limited (ABN 34 154 808 312) (Australian financial services licence number 425376) (“Kalkine”) and its related bodies corporate who are authorised to provide general financial product advice. Kalkine.com.au and its associated pages are published by Kalkine.

Any information/advice provided in this article is general in nature and does not take into account your objectives, financial situation or needs. You should therefore consider whether the information is appropriate for your objectives, financial situation and needs before acting upon it.

There may be a Product Disclosure Statement, Information Memorandum or other offer document (“Offer Document”) for the securities or other financial products referred to in Kalkine articles. You should obtain a copy of the Offer Document and consider it before making any decision about whether to acquire the security or financial product.

Kalkine strongly recommends that you seek advice from a financial adviser, stockbroker or other professional (including taxation and legal advice) before acting on any advice/information in this Article or on the Kalkine website. Not all investments are appropriate for all people.

The information in this Article and on Kalkine website has been prepared from a wide variety of sources, which Kalkine, to the best of its knowledge and belief, considers accurate. Kalkine has made every effort to ensure the reliability of the information contained in its articles (including this Article), newsletters and websites. All information represents our views at the date of publication and may change without notice.

The information in this Article does not constitute an offer to sell securities or other financial products or a solicitation of an offer to buy securities or other financial products.

Kalkine does not issue, sell or deal in any financial products.

This Article may contain information on past performance of particular investments. Please note past performance is neither an indicator nor a guarantee of future performance.

To the extent permitted by law, and excluding any dishonesty or gross negligence by Kalkine, Kalkine disclaims and excludes all liability for any direct, indirect, implied, punitive, special, incidental or other consequential loss or damage arising from the use of or reliance on this Article, the Kalkine website and any information published on the Kalkine website without any warranties or representations by Kalkine to you. To the extent the law prohibits or limits this exclusion, Kalkine limits its liability to the resupply of services.

Please also read our Terms & Conditions and Financial Services Guide for further information.

Employees and/or associates of Kalkine and its related entities may hold interests in the securities or other financial products covered in this Article or on the Kalkine website. Any such employees and associates are required to comply with certain safeguards, procedures and disclosures as required by law.

Some of the images/music that may be used in the Article are copyright to their respective owner(s). Kalkine does not claim ownership of any of the pictures displayed/music used in the Article unless stated otherwise. The images/music that may be used in the Article are taken from various sources on the internet, including paid subscriptions or are believed to be in public domain. We have used reasonable efforts to accredit the source wherever it was indicated or was found to be necessary.

Kalkine Media Pty Ltd, an affiliate of Kalkine Pty Ltd, may have received, or be entitled to receive, financial consideration in connection with providing information about certain entity(s) covered on its website.