Alvo Minerals Logo

Preliminary Metallurgical Testwork Indicates Excellent Recoveries

Alvo Minerals Limited (ASX: ALV) (“Alvo” or the “Company”) is pleased to announce preliminary metallurgical testwork results from a bulk sample of mineralised Volcanogenic Massive Sulphide (VMS) samples from the C3 prospect of the Palma Project (“Palma” or “the project”).


HIGHLIGHTS
  • Preliminary metallurgical testwork on representative drill core from the C3 Prospect has returned very positive results
  • Locked-cycle testwork is underway designed to maximise recovery to concentrates, targeting a bulk sulphide concentrate grade of >20% Cu and ~5% Pb, and a Zn concentrate grade > 50%
    • The bulk sulphide concentrate also contains appreciable levels of silver (>200 g/t Ag) which will improve the payability.
  • Excellent Bond Ball Mill Work Index of 14.0 kWhr/t, considered relatively soft for VMS projects globally
  • Single-pass testwork using standard grind sizes and flotation parameters, separated 2 concentrates
    • The Sulphide concentrate (Cu & Pb) returned grades of 25% Cu and 3% Pb
    • The Zinc concentrate returned a grade of 46% Zn
  • Positive conceptual study into producing saleable sulphuric acid from tailings which, through the production process also has the potential to generate electrical power for use on site
    • This solution would significantly enhance the sustainability credentials of the project combined with extensive locally available hydroelectricity in the immediate vicinity
  • C1 metallurgical samples sent to Australia are being composited and tested once the C3 testwork is complete
  • Phase 2 diamond drill program targeting extensions to high-grade mineralisation at the C3 prospect is ongoing and targeting new targets clustered around the C3 prospect including Mafico, Ema, Pelicano and Pombo
  • Fixed loop electromagnetic (FLEM), Downhole electromagnetic (DHEM) and Induced Polarisation (IP) surveys are active across the Palma Project
Rob Smakman, Alvo’s Managing Director commented on the testwork results:

"These test results represent a great step forward for the Palma Project. Metallurgy for VMS style projects is vital and we are really pleased with the initial results. There is a lot of work still to go with the testing, however with the locked cycle tests underway, we are confident the numbers can be confirmed shortly and enhanced. “We are also extremely conscious of our sustainable mining responsibilities and are considering various options for processing. It was under this framework that we also initiated a study into converting the sulphur rich tails into sulphuric acid. We understand the tails will naturally generate acid and that potential environmental issue will need mitigation.

“The desktop study completed by our consultants has confirmed that by floating the sulphur rich minerals in the tails and passing through a separate process route, we can not only generate commercial sulphuric acid (which is sought after in the region and globally), but iron ore and more importantly, energy to power a portion of the plant. Alvo will look to incorporate the potential processing options as a key part of our ESG framework.”

Metallurgical testwork and Results

Alvo prepared and sent over 315kg of diamond core in 202 individual samples from the C3 prospect in Central Brazil to Auralia Metallurgy (a specialist in minerals flotation) in Perth, Australia. The samples were selected and received under the supervision of BHM Process Consultants (“BHM”), specialists in Metallurgical testwork management and supervision.

The samples were received and logged, composited and the preparation of a master composite was completed. The master composite was selected to approximately match the overall expected grade of the C3 VMS mineralised zone. The sample was initially tested with a 2-stage rougher flotation at P80 125μm, 106μm and 75μm and the results analysed for future work.

The finest of the rougher tests (P80 at 75μm) was chosen for single-pass Rougher and Cleaner stage Flotation tests as illustrated in the testwork flowsheet in Figure 1. The various samples were sent to the Nagrom independent laboratory for assaying. Results were received from these tests are reported below in Table 1.


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)
Alvo Minerals (ASX:ALV)

Alvo Minerals


Keep reading...Show less

District-Scale Copper-Zinc VMS Project in Brazil

Nine Mile Metals

Nine Mile samples up to 18.27% Cu at Wedge

NINE MILE METALS ANNOUNCES XRF HIGH-GRADE RESULTS UP TO 18.27% COPPER FROM THE UPCOMING DRILL AREA AT THE WEDGE PROJECT, BATHURST, NEW BRUNSWICK

Nine Mile Metals Ltd. has released XRF (X-ray fluorescence) results for volcanogenic massive sulphide (VMS) mineralization grab samples collected from the coming drill area on the Wedge VMS project in the world-famous Bathurst mining camp (BMC) in New Brunswick, Canada. Discovered in 1956, Cominco operated the Wedge mine between 1962 and 1968, producing 1.5 million tonnes of predominantly copper ore. At the time of closure (head pillar collapsed), only the upper portion of the deposit was mined. The expectation is that the lower 60 per cent plus remains untouched based upon recent drill testing and extends at depth with the 3-D modelling.

Keep reading...Show less
Empire Metals

Empire Metals Limited Announces Appointment of Marketing Manager

Empire Metals Limited (LON:EEE), the AIM-quoted and OTCQX-traded resource exploration and development company, is pleased to announce the appointment of a Marketing Manager, a key role which, along with Empire's partnership with titanium marketing experts, TiPMC Consulting, strengthens the in-house marketing and product development team and supports the rapid advancement of the Pitfield Titanium Project ("Pitfield" or the "Project") in Western Australia.

Key Points

Keep reading...Show less
Empire Metals

Empire Metals Limited Announces Director/PDMR Shareholding

Empire Metals Limited (LON:EEE)(OTCQX:EPMLF),the AIM-quoted resource exploration and development company, announces that it was notified today that Mr Shaun Bunn, Managing Director, purchased 40,000 ordinary shares of no par value in the share capital of the Company ("Ordinary Shares") at a price of 36.25 pence each.

Following this purchase, Mr Bunn's total beneficial ownership in the Company is 2,251,111 Ordinary Shares representing 0.32% of the Company's issued share capital.

Keep reading...Show less
Empire Metals

Empire Metals Limited Announces Company Update

The Board of Empire Metals Limited (LON:EEE)(OTCQX:EPMLF), the resource exploration and development company, would like to respond to recent sharp decline in the Company's share price and would like to clarify that there has been no material change to the Company's operational or financial position to account for this movement. The Board remains confident in the Company's strategy, the progress being made at the Pitfield Titanium Project and the long-term value proposition for shareholders.

Empire continues to advance technical and commercial workstreams to unlock the Project's full potential and will update the market in due course on further developments. The Company is well funded to achieve upcoming milestones, underpinned by £4.5m fundraising in Q2 2025 and as at 30 June 2025 the Company's cash position was £6.3m.

Keep reading...Show less
High-Grade Copper-Gold Extensions at Nugent

High-Grade Copper-Gold Extensions at Nugent

Hillgrove Resources Limited (Hillgrove) (ASX:HGO) is pleased to provide the following drilling update from the Kanmantoo Copper Mine. The Nugent drilling program from the 1010 Diamond Drill Site and the 1040 Nugent Drill Site has been completed and delivered excellent results which improve the understanding of the Nugent orebody in preparation for first production. These results have increased the Gold endowment and improved knowledge of the Copper-Gold distribution.

Keep reading...Show less
Empire Metals

Empire Metals Limited Announces Director/PDMR Shareholding

Empire Metals Limited / LON:EEE / Sector: Natural Resources - Empire Metals Limited ("Empire" or the "Company")

Director Dealing

Keep reading...Show less

Latest Press Releases

Related News