Sierra Maestra Copper Belt

Following two prospecting programs over the Sierra Maestra copper belt in south east Cuba, Antilles Gold nominated the coordinates for three concessions that GeoMinera should establish, and include in the existing Exploration Agreement

  • La Cristina – 3,600ha geological investigation licence
  • Vega Grande – 49,000ha reconnaissance licence
  • Buey Cabón – 1,100ha reconnaissance licence

A subsidiary of GeoMinera has requested the issue of the concessions by the Registrar, and after their issue, which is expected in June 2023, Antilles Gold will undertake a modest exploration program before recommending which properties should be included in the El Pilar copper joint venture.

The areas incorporate a series of copper-gold-molybdenum zones that display large surficial footprints of hydrothermal alteration associated with potentially large porphyry systems, and multiple zones where secondary copper mineralization is evident, both in outcrop and in historic underground mines.

The properties, show very high prospectivity for the discovery of large, economic copper-gold-molybdenum porphyry deposits, and associated epithermal gold-silver-base metal systems.

The Sierra Maestra belt is a large (+200km long) east-west trending island arc terrain of Cretaceous age geology that is intruded by Eocene age stocks which are the source for the widespread gold and base-metal mineralization that characterizes the underexplored belt which hosts the large El Cobre copper-gold-base metals deposit.

El Cobre has been exploited since 1540 and is ongoing, making it the oldest copper mine in the Americas.

The three concessions are hosted within the same geological sequence as El Cobre and are located immediately to the south and further along strike to the west of this major mineralized system.

Secondary copper mineralization associated with intense sericite sulphide-oxide zone in historic underground workings at Las Cristinas

It is interpreted that El Cobre is a distal copper-gold-silver-base metal replacement and vein style system that is associated with mineralized fluids that are related to porphyry copper-gold-molybdenum systems, as evidenced in the three concessions.

The hydrothermal alteration evident at La Cristina is interpreted to be the upper parts of a cluster of exposed porphyry copper-gold-molybdenum systems that remain unexplored by modern techniques, and have never been drilled.