Análisis estructural de los afloramientos de roca, sector San Mateo, formación San Mateo (EOCENO), Manta – Ecuador.
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2020-04
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Facultad de Ciencias Naturales, Universidad de Guayaquil
Resumen
El presente trabajo de investigación tuvo como objetivo determinar la orientación de los ejes y campos de esfuerzos y su correlación con el contexto tectónico regional de los afloramientos de la Formación San Mateo, en el Sector San Mateo, Manta. Los resultados se obtuvieron del levantamiento de 123 datos estructurales, interpretados posteriormente mediante el análisis estadístico y cinemático; los cuales sugieren qué, el área de estudio estuvo sometida a campos de esfuerzo compresivos y distensivos con dirección W-E, SW-NE y NW-SE. La orientación de esfuerzos distensivos y compresivos en la misma dirección, indicativo de intermitencia en los procesos tectónicos; generando estructuras distensivas en campos de esfuerzos compresivos. Se realizó análisis petrográfico de las muestras de rocas; MB4, MB6, MB12 y MB14 determinando la composición mineralógica modal de las mismas, obteniendo como resultados dos tipos de litologías correspondientes a Subfeldarenita y Sublitoarenita.
The objective of this research work was to determine the orientation of the axes and stress fields and their correlation with the regional tectonic setting of the outcrops of the San Mateo Formation, in the San Mateo Sector, Manta. The results were obtained from 123 structural data, subsequently interpreted by statistical and kinematic analysis; which suggest, the study area was subjected to compressive and distensive stress fields with strikee W-E, SW-NE and NW-SE. The orientation of distensive and compressive stresses in the same direction, this finding indicates of intermittency in tectonic processes; generating distensive structures in compressive stress fields. Petrographic analysis of the rock samples was performed; MB4, MB6, MB12 and MB14 determining their modal mineralogical composition, obtaining as results two types of lithological types corresponding to Subfeldarenite and Sublitharenite.
The objective of this research work was to determine the orientation of the axes and stress fields and their correlation with the regional tectonic setting of the outcrops of the San Mateo Formation, in the San Mateo Sector, Manta. The results were obtained from 123 structural data, subsequently interpreted by statistical and kinematic analysis; which suggest, the study area was subjected to compressive and distensive stress fields with strikee W-E, SW-NE and NW-SE. The orientation of distensive and compressive stresses in the same direction, this finding indicates of intermittency in tectonic processes; generating distensive structures in compressive stress fields. Petrographic analysis of the rock samples was performed; MB4, MB6, MB12 and MB14 determining their modal mineralogical composition, obtaining as results two types of lithological types corresponding to Subfeldarenite and Sublitharenite.