CURRENT STATE OF INVESTIGATIONS IN THE GOSSANS WITH GOLD AND SILVER FROM CUBAN ARCHIPELAGO
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Abstract
The supergenic processes gave rise to an important group of deposits, among them, gossans with gold and silver, that formed from minerals base metals, polymetallic and primary gold. The results of the visits of Geological Activity Control Group to the objectives, their minutes, economic information, as well as the reports, technical tasks and other related documents are used. These were based on critical bibliographic review and results obtained, the methodologies used in evaluated geological investigations and future actions valued too. More than 70 gossans are known with gold and silver, there are no studies that integrate the information and there is a tendency to affirm that all are equal, evidence that it isn’t reflected in plants recovery. The gossans constitute 25-30% of gold resources volume from deposits. In the last decades, they are the main source for gold and silver for the 2 oxidized ore processing plants at the Golden Hill deposits in Las Tunas and Barite, in Santiago de Cuba. The geological and technological investigations of gossans in Cuba are divided into 4 stages: The International Economic Associations (A.E.I) 1995-1999; The investigations by the territorial companies 2000-2008; the Bolivarian Alternative for Latin America and Caribbean with Peoples; the ALBA TCP 2008-2012 and the stage of Geology National Development Program 2013-2020. It is concluded that the gossans are the immediate objectives with greater possibilities to develop with the state financing; nevertheless, the revision of the strategies in geological investigations is imposed from the point of view of their projection.
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