Alvo Minerals

Metallurgical Tests Confirm Bluebush as Ionic Adsorption Clay REE Project

Exceptional magnet rare earth extractions up to 83% using ammonium sulphate solution

Alvo Minerals Limited (ASX: ALV)(“Alvo” or the “Company”) is pleased to announce results from initial metallurgical testwork undertaken on auger drill samples from the Bluebush Ionic Clay Rare Earth Project (“Bluebush” or “The Project”). Bluebush is located on the northern half of the Serra Dourada granite, the same host rock of the Serra Verde Ionic Clay REE deposit (“Serra Verde”), believed to be the only ionic clay project currently being commissioned outside of China.


HIGHLIGHTS

  • Initial metallurgical testwork on auger samples shows excellent extractions of rare earth elements (REE) using industry standard ammonium sulphate solution (AMSUL) .
  • High-value magnet rare earths (MRE) recovery rates using weakly acidic (pH 4) AMSUL at ambient temperatures achieved the following extractions (after 30 minutes):
    • Neodymium (Nd): up to 89% averaging 60%.
    • Praseodymium (Pr): up to 86%, averaging 57%.
    • Dysprosium (Dy): up to 53%, averaging 37%.
    • Terbium (Tb): up to 69%, averaging 48%.
    • Total MRE (Nd,Pr,Dy +Tb): up to 83%, averaging 56%.
  • The results show that excellent REE desorption was achieved across samples taken from the Boa Vista and Sao Bento prospects using industry standard conditions and crucially confirms that the Bluebush Project is an ionic (adsorption) clay REE project.
  • Metallurgical samples will be tested from current diamond drilling to target high-grade zones and further optimise recovery ratios.
  • Diamond drilling continues at the highest grade MRE zones, to test the depth profile and extent of the ionic clay. Auger results include results up to 3m @ 3,415ppm TREO at EOH.
  • Truck mounted auger drilling continues to test extents of the mineralisation (open in all directions) and some handheld auger is also underway to test for new regional prospects.

The results confirm the status of Bluebush as an ionic clay (adsorption) REE project, important due to the simpler potential mining and processing costs with associated lower capital and operating costs than other hard rock or simple clay hosted REE prospects.

Rob Smakman, Alvo’s Managing Director commented on this critical step:

“This is a significant step forward for Bluebush with the confirmation of Ionic clay adsorption hosted mineralisation at both Boa Vista and Sao Bento. The results are outstanding for initial metallurgical testwork with individual samples of MRE’s recovering up to 83%.

We have said from when we acquired this exciting project, there were three things we wanted to clearly demonstrate during the due diligence period: Scale, Grade, and Ionic Clay (Adsorption) Mineralisation. Our results released to date have demonstrated high grades of TREO and MREO near surface and over broad areas at both Boa Vista and Sao Bento prospects, covering the potential size and grade questions. The final, and possibly the most important factor, was establishing the presence of ionic clay adsorption hosted mineralisation. The testwork released today shows this.

With samples from over 130 auger holes still in the lab, ongoing diamond drilling, regional exploration through handheld auger drilling and the initiation of the Loupe geophysical surveys, we expect there will be plenty to report leading into the end of CY2023 from the Bluebush Ionic REE Project.”

Bluebush Metallurgical Results

The results reported here are from auger drilling at the Boa Vista and Sao Bento prospects, part of the larger Bluebush Project (see Figure 1). Samples were collected at 1-2m intervals and sent to the SGS GEOSOL lab in Goiania and Belo Horizonte, Brazil.

Standard sample preparation at the lab (see Appendix 1) was undertaken before a sample was screened to - 4mm. The ionic adsorption clay-hosted rare earth element leach test used a diluted solution of 0.5 molar ammonium sulphate at room temperature and a pH 4 for 30 minutes. Recoveries above 30% are considered by Alvo to confirm the ionic nature of the mineralisation.

Future metallurgical investigations will be designed using the follow-up auger drilling and diamond drilling samples to improve the overall MREO recoveries and develop a more complete understanding of the nature of the clays. It is important to note that the results of the AMSUL desorption stage are un-optimised, and further work to seek to further improve REE extractions is being planned.


Click here for the full ASX Release

This article includes content from Alvo Minerals, licensed for the purpose of publishing on Investing News Australia. This article does not constitute financial product advice. It is your responsibility to perform proper due diligence before acting upon any information provided here. Please refer to our full disclaimer here.

ALV:AU
The Conversation (0)
Somerset Minerals Logo

Acquisition of High-Grade Copper Project Adjacent to White Cliff Minerals

Somerset Minerals Ltd (“Somerset” or the “Company”) (ASX:SMM) is pleased to advise that it has entered into a conditional agreement to acquire 100% of the issued capital of Sentinel Resources Pty Ltd (“Sentinel”), which, through its local subsidiary, holds the Coppermine Project (the “Project”) in Nunavut, Canada.

Importantly, the Coppermine Project hosts 1,055 km2 of the prospective Copper Creek Formation basalts, and is interpreted to include the strike extensions to White Cliff’s high priory targets of Vision, Stark, Thor and Rocket (Figure 2 & 3), with the prospectivity of the wider project area also supported by extensive surface sampling and historic exploration (Table 1). Importantly, Somerset holds the ground entirely around and along strike from White Cliff’s recently acquired Danvers prospect which contains a non-JORC or NI 43-101 resource of 4.16Mt @ 2.96% Cu.

Keep reading...Show less

Lundin Mining Announces Sale of Neves-Corvo and Zinkgruvan for Total Consideration of up to $1.52 Billion

Lundin Mining logo (CNW Group/Lundin Mining Corporation)

TSX: LUN) (Nasdaq Stockholm: LUMI) Lundin Mining Corporation ("Lundin Mining" or the "Company") announces today it has signed a definitive agreement to sell its Neves-Corvo operation in Portugal and Zinkgruvan operation in Sweden to Boliden AB (OM: BOL) ("Boliden") for up to $1.52 billion in total consideration (the "Transaction"). Unless otherwise stated, all numbers are presented in United States dollars.

News Provided by Canada Newswire via QuoteMedia

Keep reading...Show less
Business handshake.

Rio Tinto and Sumitomo Partner to Advance Winu Copper-Gold Project

Rio Tinto (ASX:RIO,NYSE:RIO,LSE:RIO) has signed a term sheet with Sumitomo Metal Mining (TSE:5713) for a joint venture to advance the Winu copper-gold project in Western Australia.

The partnership, announced on Wednesday (December 4), seeks to develop both companies’ exploration initiatives.

Sumitomo will acquire a 30 percent equity stake in the Winu project for US$399 million, including an initial payment of US$195 million and US$204 million in deferred considerations tied to project milestones and other conditions.

Keep reading...Show less
VVC Resources (TSXV:VVC)

Results of VVC Annual Shareholders’ Meeting

VVC Exploration Corporation, dba VVC Resources, (“VVC”), (TSX-V:VVC and OTCQC:VVCVF) announces the following:

Shareholders’ Meeting
The Company’s Annual General Meeting of Shareholders (“AGM”) took place virtually yesterday with 34 attendees (shareholders and guests). Total attendance in person and by proxy was 137 shareholders representing about 51.4% of the outstanding shares. At the AGM, shareholders approved the election of all Directors proposed by Management with over 90% of the tendered votes being in favor, and the re-appointment of MNP LLP as auditors of the Company with all of the tendered votes being in favor.

Keep reading...Show less
  Greentech Metals Limited

Drilling Planned for Resource Expansion at Whundo Copper Project

GreenTech Metals Ltd (ASX: GRE) (GreenTech or the Company) is pleased to announce a second stage drill program at the Whundo Cu-Zn project in the West Pilbara region, which is anticipated to commence in the coming weeks.

Keep reading...Show less
Closeup of the end of many copper cylinders of varying sizes.

Top 5 ASX Copper Stocks of 2024

Copper has performed well in recent years, and the price of copper on the COMEX and LME reached record highs in May.

While it has pulled back over the following months, there is plenty of optimism for the red metal over the longer-term.

Many market watchers are forecasting a robust outlook, especially as low supply is coming up against higher usage from sectors such as the renewable energy and electric vehicle industries. Fastmarkets is predicting that copper demand from energy transition sectors should grow at a CAGR of 10.7 percent in the decade to 2034.

Keep reading...Show less

Latest Press Releases

Related News

×