Geoquímica y petrografía de la formación Piñón en el cerro Santa Ana, cantón Samborondón, provincia Guayas-Ecuador
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2021-03
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Facultad de Ciencias Naturales. Universidad de Guayaquil
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El objetivo general de este estudio es determinar la génesis de las rocas presentes del Cerro Santa Ana, Cantón Samborondón, mediante análisis geoquímicos y petrográficos. La metodología se basó en diferentes actividades como la recolección de 24 muestras para análisis macroscópico; se seleccionaron 10 muestras para sección de láminas delgadas y 3 para análisis geoquímico. Para la descripción de las muestras se utilizaron, la serie de Bowen Barrientos (2013), diagrama de Streckeisen (1976), análisis multielemental en ensayos de Espectrómetro de Emisión de Plasma Acoplado Inductivamente realizado en el laboratorio de Services Perú, se obtuvo los resultados de óxidos mayores, elementos traza y tierras raras. Para la interpretación de estos resultados se basó en los diagramas tipo Harker, ternarios de Total Alkalis Sílica, discriminación tectónica , gráficos Spider en REE y asociación mineralógica de la normativa CIPW; determinando índices termodinámico hipotéticos, dando el resultado que las rocas básicas proceden de la serie magmática toleítica, procedentes de un ambiente de arco de isla toleítica (IAT) con procedencia tipo MORB, Se idetificarion 10 tipos de rocas mediante el diagrama de Streckeisen dando el nombre de la roca como: basaltos, granodioritas y riolita.
The general objective of this study is to determine the genesis of the rocks present in Cerro Santa Ana, Cantón Samborondón, through geochemical and petrographic analyzes. The methodology was based on different activities such as the collection of 24 samples for macroscopic analysis; 10 samples were selected for thin section section and 3 for geochemical analysis. For the description of the samples, the Bowen Barrientos series (2013), Streckeisen diagram (1976), Multielemental analysis in Inductively Coupled Plasma Emission Spectrometer tests carried out in the Services Peru laboratory, the results were obtained of major oxides, trace elements and rare earths. The interpretation of these results was based on Harker type diagrams, Total Alkalis Silica ternaries, tectonic discrimination, Spider graphs in REE and mineralogical association of the CIPW standard; determining hypothetical thermodynamic indices, giving the result that the basic rocks come from the toleitic magmatic series, coming from a toleitic island arc environment (IAT) with MORB origin, 10 types of rocks were identified by means of the Streckeisen diagram giving the name of the rock as: basalts, granodiorites and rhyolite.
The general objective of this study is to determine the genesis of the rocks present in Cerro Santa Ana, Cantón Samborondón, through geochemical and petrographic analyzes. The methodology was based on different activities such as the collection of 24 samples for macroscopic analysis; 10 samples were selected for thin section section and 3 for geochemical analysis. For the description of the samples, the Bowen Barrientos series (2013), Streckeisen diagram (1976), Multielemental analysis in Inductively Coupled Plasma Emission Spectrometer tests carried out in the Services Peru laboratory, the results were obtained of major oxides, trace elements and rare earths. The interpretation of these results was based on Harker type diagrams, Total Alkalis Silica ternaries, tectonic discrimination, Spider graphs in REE and mineralogical association of the CIPW standard; determining hypothetical thermodynamic indices, giving the result that the basic rocks come from the toleitic magmatic series, coming from a toleitic island arc environment (IAT) with MORB origin, 10 types of rocks were identified by means of the Streckeisen diagram giving the name of the rock as: basalts, granodiorites and rhyolite.
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MORB, IAT, PETROGRÁFICOS, GEOQUÍMICOS