The El Pilar, Gaspar, and San Nicholas porphyry deposits are located within the 17,800 ha El Pilar concession near Ciego de Avila in central Cuba, and are individual intrusions with the potential for multiple copper-gold discoveries.
Mapping, soil sampling, trenching, ground and aerial geophysical surveys, and a 48,000m shallow drilling program were carried out within the concession in the 1990s by a Canadian mining company which identified widespread copper and gold mineralisation in weathered saprolite near the surface but failed to identify the exposures as being a large leached porphyry system.
The in-situ copper-gold sulphide mineralisation of the target potassic porphyry core is interpreted to be immediately below the surficial phyllic cap at El Pilar and has not yet been tested at depth.
The surficial hydrothermal alteration evident at El Pilar represents a classic porphyry phyllic cap and the dimensions of the phyllic alteration indicate the depth of the porphyry intrusion could exceed 1,000m.
The size of the pyllic alteration zone at the surface of the El Pilar deposit observed by Antilles Gold indicates the potential of the copper-gold orebody to exceed 500Mt as an open pit target, and is an excellent advanced exploration prospect.
Antilles Gold is currently conducting a preliminary 2000m drilling program to approximately 300m vertically and after results are obtained and a ground geophysical survey has been completed to establish future hole locations, a 15,000m program to the same depth will be undertaken during 2023.
If copper grades from historic shallow drilling are replicated at depth, the El Pilar concession will be transferred from Antilles Gold’s Exploration Agreement with GeoMinera to a joint venture for continuing exploration and potential development.