ABOUT MINERAL PLACERS IN CUBA'S MARINE TERRITORY
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Abstract
The article is the result of the reinterpretation of existing information on heavy and precious minerals in Cuba's marine territory, as well as the geological constitution in terms of the factors and lithomorphogenetic processes involved in the formation, transport, accumulation and modification o f s ediments p resent o n t he s eabed. I t i s a contribution to the new geological mapping at a scale of 1:50 000, as it aims to re- evaluate the potential of economically exploitable placers, as well as to specify some concepts and definitions, i n o rder t o c ontribute t o a m ore a ppropriate u se o f t he existing results, both from the point of view of classification according to their size or magnitude of resources and importance, as well as the characterization of the sediment accumulation environments. The results obtained show a low content of useful minerals disseminated in the sediments and the coexistence of chemically stable and unstable minerals on the seabed. These do not constitute mineral deposits as recorded in some investigations and, consequently, do not form mineral placers, due to: 1) low presence of terrigenous deposits and predominance of a carbonate environment, 2) low level of reworking and redeposition of the terrigenous sediments, 3) lack of appropriate input sources in the emerged territory and 4) 4) the gold that could have formed placers in the marine territory was deposited in the fluvial valleys. Their importance lies in the fact that they are good indicators to reconstruct the accumulation environment of terrigenous sediments in the marine environment.
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