Mineral composition of regoliths from the “Las Nuevas", "Paquito ", “Santa Elena” and “Mckinley” sectors belonging to the Pinos Terrain of the Isla de la Juventud
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Abstract
The rocks of the Pinos Terrain (Isla de la Juventud), present a characteristic magmatism and metallogeny, not appreciated in their related equivalents corresponding to the Jurassic sedimentary sequences of the continental margin of Pinar del Río and Guamuhaya. On the Isle of Youth, they host the main deposit of Au de Cuba; “Delita”, the only one of its kind in the country; to "Lela", complex zoned deposit of W-Mo-Cu known in the country, as well as the only Greisenized granites that outcrop in the localities of "Las Nuevas", "Paquito", "Santa Elena" and "Mc Kinley" , among other. Such a combination in the association of elements present in the mineral deposits of the territory, has led some researchers to refer to it as "exotic", however, it can be interpreted as a result of the normal geodynamic and metallogenic evolution of the same from the Jurassic to recent times (Casañas-Díaz et al., 2017). The petrochemical and mineralogical characterization of the magmatism present in rocks in the territory of the Pinos land, will allow its petrochemical and geodynamic affiliation, a matter of great importance to correctly recognize the genetic links between said process and the metallic mineralization present in the territory under study. The same way to explain the metallogenic links and regularities that gave rise to it and control its spatial distribution. With this objective, 17 samples were evaluated for petrochemical and mineralogical analysis, the latter using X-ray powder diffractometry, which allowed clarifying the mineralogical associations of interest from the protolith that gave rise to them.
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