THE CLASSIFICATION OF THE GOSSANS. IMPLICATIONS FOR PROSPECTING
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Abstract
The gossans constitute an industrial genetic type of deposits. In Cuba, 161 are reported, of which 3 are exploited: Lote Grande, the Golden Hill mineral field, a mineral zone enriched in gold from the El Cobre deposit, called Barita. All of them with limited resources. The government budget annually allocates approximately 33 % of funding for geological research work for gold. Research is needed to achieve greater effectiveness in the selection of new deposits and obtain a greater volume of ores. The presence of small primary deposits of different genesis, the non-existence of a classification based on the use of Cuban patterns for gossans and the little experience in their exploration, generate a significant margin of error in terms of selecting the targets to be prospected. Starting from the degree of study of the primary ores, the existence of 141 virgin gossans (of which their potentialities to host Au and Ag ores are unknown) and the main regularities formulated from the standard gossans by geoenvironments, a classification is proposed, where empirical evidence, supported by accumulated practice, are key factors taken into account. The main expected impact, is the contribution of a general tool that helps a more efficient selection of the objectives for the geological exploration of this type of gold deposits by provinces, giving priority to those objectives with the greatest prospects for the development of the mining activity.
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