Antilles Gold Limited

ASX CODE AAU

Focused on near-term gold projects in the Greater Antilles Islands

Cuba and the Dominican Republic

Refractory Gold and Silver Projects

World reserves of refractory ore containing precious metals are  increasing and the patented Albion oxidation process has proven to be a technically and commercially attractive solution for the necessary oxidation of such ore prior to extraction of gold and silver utilising standard cyanide-in-leach (“CIL”) technology.

Both Cuba and the Dominican Republic host predominately refractory deposits of gold and silver, and Antilles Gold intends to acquire exploration areas in these two countries which could contribute to the Company’s future growth.

Antilles Gold’s first project in Cuba will be to participate in the planned development of an open pit mine based on the La Demajagua gold / silver deposit on the Isle of Youth for which Consultants have assessed a substantial Exploration Target based on 50,000m of historic drilling and detailed on the Projects page.

Antilles Gold will participate in the development of the La Demajagua mine through a 49% shareholding in a joint venture with Cuban Government owned mining company, GeoMinera SA.

The Company will utilise its experience and IP gained from a twelve year involvement in the development and operation of the world’s first application of Albion technology for recovering precious metals, at Las Lagunas in the Dominican Republic.

The joint venture has the option of producing high grade concentrate that could be sold to smelters in China or Russia, or constructing an Albion/CIL plant to process the concentrate and produce gold and silver in the form of doré bars.

If an Albion / CIL plant is constructed, it is intended that it would become a processing hub for refractory concentrates produced within the region.

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Technology

The patented Albion Oxidation Process is a processing technology that permits the extraction of precious metals from refractory ore by conventional techniques.

Most sulphide ores can not be leached at acceptable rates at atmospheric pressure.

Feed to the Albion Process is in the form of a sulphide concentrate containing precious metals.  

The Albion Process utilises both ultrafine grinding and oxidative leaching at atmospheric pressure to oxidise the concentrate and allow metal extraction utilising cyanide-in-leach technology.

A major benefit of the Albion Process, in addition to relatively low capital and operating costs, is that it renders arsenic, which tends to be prevalent in refractory ores, as a stable, non-soluble ferric arsenate which permits environmentally safe deposition in tailings storage facilities.

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Company Background

Antilles Gold Limited was listed on the Australian Securities Exchange (“ASX”) in 2006 under its previous name of PanTerra Gold Limited, to raise capital for its subsidiary, EnviroGold (Las Lagunas) Limited’s development of the Las Lagunas gold tailings retreatment project in the Dominican Republic.

The Las Lagunas project involved the recovery of approximately 5.0 million tonnes of stored refractory tailings from the Pueblo Viejo mine by dredging, production of a float concentrate, ultrafine grinding, oxidation, and production of dore through CIL and elution circuits.

The installed capacity of the Las Lagunas Albion/CIL plant which operated from July 2012 to December 2019, was 200,000 tpa.

Due to unexpected contaminants in the stored tailings and design issues with the world’s first Albion circuit for recovery of precious metals, gold recoveries from concentrate were limited to 60% rather than the +90% that would otherwise have occurred with a ‘clean’ concentrate from a mine, and an improved plant design.

However, the Directors of Antilles Gold, and the holder of Albion patents, Glencore Technology, are confident a second generation plant design will achieve +90% gold recoveries from concentrates as is achieved at GeoPro Mining’s, Albion/CIL plant at Ararat in Armenia.

Las Lagunas Albion/CIL Plant, Dominican Republic
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ANTILLES GOLD LIMITED
ASX CODE AAU
55 Kirkham Road
Bowral NSW 2576
Australia
+ 61 2 4861 1740
ANTILLES GOLD LIMITED
ASX CODE AAU
55 Kirkham Road
Bowral NSW 2576
Australia
+ 61 2 4861 1740