Petrographic characterization of the Aracataca’s batholith south-west sector of the Sierra Nevada of Santa Marta
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- Articles
- Submited: October 4, 2017
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Published: November 29, 2017
Abstract
Aracataca’s Batholith is a unit of felsic to intermediate composition constituted by intrusive igneous bodies of the granodiorites facies, quartz-monzonites and tonalities that appear in the Sierra Nevada de Santa Marta (Snow Mountain of Santa Marta) foothill in the South-East sector of the Municipality of Fundación, Department of Magdalena. This study is carried out in order to obtain information based on the results obtained from the performance of petrographic analysis made to samples obtained from the Aracataca’s Batholith. This study is carried out in order to obtain a detailed petrographic characterization of the mineral associations in each of the lithological variations that make up this unit. The studies presented include the description of lithological facies based on petrographic analysis, which presents mineralogical characteristics, which make possible to determine the compositional and textural character of each lithology, as well as the type of alteration (Propiliticas and Sericiticas) that affect the appearance of the crystals in the rocks. The results of these analyses indicate the variation of textural facies within the Batholith at the time of its formation, producing some effects in the mineral components of the rock, which are associated with the incidence of tectonic activity and the occurrence of hydrothermal fluids. Also describes the results of trials of diffraction of Rays X (DRX); in these analyses, it is evident that changes and alterations of the mineral are associated with magmatic events during its formation process and the domain of hydrothermal fluids.
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