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.

Trailbreaker Resources Announces Exchange Approval Of COHO Property Option

Trailbreaker Resources Announces Exchange Approval Of COHO Property Option

Trailbreaker Resources Ltd. (TBK.V) (“Trailbreaker” or “the Company”) is pleased to announce that the TSX Venture stock exchange (the “Exchange”) has approved the option agreement for Trailbreaker to acquire a 100% interest in the Coho property, central British Columbia (BC).

The 8,000-hectare Coho property covers a copper-gold (Cu-Au) porphyry target located 90 km north of Fort St. James, BC, and 30 km west of the Mount Milligan mine. Historically named the Chuchi South property, Trailbreaker renamed the project as the Coho property when the Company announced the acquisition on May 26, 2025 (see news release).

Keep reading...Show less
​​Magmatic Closing In on Potential New Copper-Gold Porphyry Discovery at Calais

​​Magmatic Closing In on Potential New Copper-Gold Porphyry Discovery at Calais

Myall FJVA Project (Farm-in and Joint Venture with Fortescue)

Magmatic Resources Limited (‘Magmatic’ or ‘the Company’) is pleased to provide an update on ongoing activities at our Myall Project with FMG Resources Pty Ltd (‘Fortescue’), a wholly-owned subsidiary of Fortescue Ltd (ASX:FMG) near Narromine in New South Wales.

Keep reading...Show less
Stack of shiny gold bars with embossed details.

Metals Focus: Gold to Average US$3,210 in 2025 as Central Banks Buy and Trade Tensions Grow

Leading gold analysis firm Metals Focus published its annual flagship Gold Focus report on Thursday (June 5).

The report outlines the key trends influencing the gold market and price over the past year, noting that the metal experienced a remarkable run in 2024, driven by improving investor sentiment toward the yellow metal.

Throughout the year, the gold price surged at a blistering pace, starting 2024 at around the US$1,980 per ounce mark and reaching a peak of US$2,790 at the end of October. Since then, gold has continued to climb, setting repeated record highs since the start of 2025 — the most recent occurred on May 6, when gold reached US$3,437.

Keep reading...Show less
Marvel Gold Limited

Signing of Binding Share Purchase Agreement Tabakorole and Yanfolila, Mali

Marvel Gold Limited (ASX: MVL) (Marvel or the Company) is pleased to announce that it has entered into a binding Share Purchase Agreement (Agreement) with Anchises Capital LLC (Anchises) to sell its interests in the Tabakorole and Yanfolila Gold Projects in Mali via the sale of the issued capital of Marvel’s wholly owned subsidiaries, Marvel Gold Australia Pty Ltd, Sola Mining SARL and Yanfo SARL (Subsidiaries) that hold Marvel’s interests in the Tabakorole and Yanfolila Gold Projects (Transaction).

Keep reading...Show less
Asra Minerals Limited

Asra Strengthens Leadership & Technical Team to Drive Leonora Gold Strategy

Asra Minerals Limited (ASX: ASR; “Asra” or “the Company”) is pleased to announce key updates to its leadership and technical team. Effectively immediately, Mr Paul Stephen has been appointed Managing Director, and Mr Ziggy Lubieniecki has been engaged as a Geological Consultant to assist Asra Minerals’ exploration programs.

Keep reading...Show less
Harvest Gold President and CEO Rick Mark.

Harvest Gold CEO Outlines Strategic Play in Québec’s Gold-rich Abitibi Region

Harvest Gold (TSXV:HVG) President and CEO Rick Mark believes the company has a strong position in Québec's Abitibi greenstone belt, emphasizing the highly prospective Urban-Barry belt, "a very well-known mine-producing belt."

In an interview with the Investing News Network, Mark also honed in on Québec's supportive mining environment and accessible properties, which keep exploration costs "relatively very inexpensive."

“The exciting thing about the Urban-Barry belt is it contains a (gold) deposit called Windfall, which Gold Fields (NYSE:GFI) just bought from Osisko Mining,” Mark noted. “Now, the interesting thing about that as well is that the belt itself is basically owned by Gold Fields, except for the three large properties that Harvest Gold has in the belt.”

Keep reading...Show less

Latest Press Releases

Related News

×