Antilles Gold Limited (ASX:AAU)

Antimony Production Target of ~4,500tpa for La Demajagua Mine

Antilles Gold Limited (“Antilles Gold” or the “Company”) (ASX: AAU, OTCQB: ANTMF) advises that subsequent to the ASX announcement on 13 September 2024 which reported potential antimony production from the proposed La Demajagua gold-silver- antimony mine in Cuba, additional metallurgical test work data has been received from Chinese engineers, BGRIMM Technology Group (http://english.bgrimm.com/).


The Technical Consultant for the project, Vancouver based JJ Metallurgical Services Inc, has revised production targets for the two concentrate products expected to be produced by the La Demajagua mine. (refer attached Memorandum and JORC Edition 2012 Table 1)

  • The production targets have been based on the Pitshell 49 resource modelling incorporated in the initial Scoping Study for the project reported to ASX on 30 March 2023, and the antimony content derived from the metallurgical samples.
  • Based on a mill throughput of 815,000 tonnes per annum (‘tpa’), and reverse flotation of the bulk flotation concentrate at a mass pull of 10%, it is expected that ~50,000tpa of a gold-arsenopyrite concentrate will be produced with a grade of ~31.9g/t Au and ~4.9% Sb (antimony), together with ~5,560tpa of a gold-silver-antimony concentrate grading ~49.1g/t Au, ~2,000g/t Ag, and ~46.2%Sb.
  • The gold-arsenopyrite concentrate will be subjected to alkaline leaching to selectively dissolve antimony. After solid/liquid separation, the dissolved antimony will be precipitated to produce ~3,980tpa of an antimony precipitate with an estimated ~48% Sb content.
  • The antimony precipitate will be blended with the gold-silver-antimony concentrate to produce a final concentrate product of ~9,540tpa grading ~29.9g/t Au (~9,170oz Au per year), ~1,200g/t Ag (~368,000oz Ag per year), and ~47% Sb (~4,480t Sb per year).
  • The gold-arsenopyrite concentrate produced after alkaline leach is expected to be ~45,670 tpa grading ~34.6g/t Au (~50,800oz Au per year).
  • The 50% owned joint venture which is developing the project plans to oxidise the refractory gold-arsenopyrite concentrate followed by cyanide leaching to produce a higher value gold doré.
  • BGRIMM has recently completed 9 months of metallurgical test work on the La Demajagua concentrate which demonstrated the technical viability of constructing a two-stage fluidised-bed roaster and cyanide leach circuit, and established a ~92% gold recovery from the gold-arsenopyrite concentrate.
  • The methodology and cost of stabilising arsenic which is generated during roasting, also needs to be established through test work currently being undertaken by specialists in Canada.
  • Based on the production targets advised by consultants, and at current prices for gold (US$2,600/oz), silver (US$30/oz), and antimony (US$25,000/t), and payables for contained metal in the gold-silver-antimony concentrate offered by potential buyers (55%, 65%, and 57% respectively), revenue for this concentrate could be in the order of US$84 million per year for the 9 year mine life for the first stage, open pit operation.
  • The potential sales value of contained antimony in the gold-silver-antimony concentrate could now be over US$40 million per year more than assessed in March 2023, demonstrating its growing importance to the La Demajagua project.
  • The income for this antimony-rich concentrate will be in addition to that received for ~47,000oz Au per year forecast to be contained in the gold doré.
  • A new Scoping Study for the expanded project incorporating the processing facility and the production of a gold doré and an antimony-rich concentrate will be completed after the estimated construction and operating costs have been received from BGRIMM, and is expected to demonstrate robust returns at conservative metal prices.

COMMENT:

Antilles Chairman, Brian Johnson said: “with improved supply-demand dynamics for antimony and a strengthening price environment, we are now rapidly advancing project development studies with the assistance of BGRIMM Technology Group and our Technical Consultants. The initial production targets defined for La Demajagua is a good starting point and we look forward to delivering the Scoping Study for an expanded operation. We are also engaging with a wider cohort of potential antimony buyers given the stronger demand and price environment for the strategic metal.”


Click here for the full ASX Release

This article includes content from Antilles Gold, 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.

AAU:AU
The Conversation (0)
Revision to Updated Scoping Study Nueva Sabana Mine, Cuba

Revision to Updated Scoping Study Nueva Sabana Mine, Cuba

Antilles Gold Limited (AAU:AU) has announced Revision to Updated Scoping Study Nueva Sabana Mine, Cuba

Download the PDF here.

Gold and silver bars stacked on a reflective black surface.

Gary Savage: Gold, Silver — Next Price Targets and Long-term Calls

Gary Savage, president of the Smart Money Tracker newsletter, shares his long-term outlook for gold and silver prices, saying both metals could rise substantially higher.

He's calling for US$10,000 per ounce gold, while silver could hit US$500 per ounce in three to four years.

Keep reading...Show less
Ticker board with "great quarter" text and rising numbers in green and yellow.

Major Gold Miners Shine in Q1, Buoyed by Strong Gold Price Performance

After a robust first quarter for the gold-mining sector, a slew of the world’s largest gold producers delivered standout financial and operational results driven by the soaring gold price.

The yellow metal's price averaged US$2,860 per ounce during the quarter, up 38 percent from a year earlier, allowing the industry to capitalize on favorable macroeconomic conditions while positioning for sustainable growth.

Below is a breakdown of how a few major players fared in Q1 2025.

Keep reading...Show less
Circular interior view of a particle accelerator, showcasing intricate machinery and lights.

Scientists at CERN Successfully Turn Lead into Gold — But Only for a Nanosecond

Scientists at the Large Hadron Collider (LHC) at CERN have successfully transmuted lead into gold — not by alchemy, but by smashing heavy ions together at nearly the speed of light.

The process, confirmed by the ALICE collaboration and published in "Physical Review Journals," reveals that during Run 2 of the LHC (2015 to 2018), some 86 billion gold nuclei were produced via high-energy collisions between lead atoms.

While that amounts to just 29 trillionths of a gram, the feat marks the first time this rare transmutation process has been systematically measured and analyzed in a laboratory setting.

Keep reading...Show less
Great Divide Mining

Second LiDAR interpretation identifies additional compelling targets at GDM’s Devils Mountain Gold Project

Emerging gold producer and exploration companyGreat Divide Mining Ltd (the Company or GDM) (ASX:GDM), is pleased to announce the completion of a second LiDAR interpretation over EPM 26135 Kilkivan, Devil’s Mountain Gold Project, SE Queensland.

Keep reading...Show less
Miramar Resources

Gidji Drilling Delivers More Gold Results

Miramar Resources Limited (ASX:M2R, “Miramar” or “the Company”) advises that initial assays from the current aircore drilling campaign at the Gidji JV Project include several significant gold results.

Keep reading...Show less
Asra Minerals Limited

Asra to Secure 100% Ownership of Mt Cutmore at Leonora North Gold Project

Asra Minerals Limited (ASX: ASR; “Asra” or “the Company”) is pleased to announce it has executed a binding Term Sheet (“the Agreement”) to acquire the remaining 49% interest in the Mt Cutmore prospects located at the Mt Stirling Leonora North Project (“the Project”) from its joint venture partners (Ross Crew, Russell McKnight and Christopher Crew) (“the Sellers”), subject to conditions precedent (“the Acquisition”).

Keep reading...Show less

Latest Press Releases

Related News

×