Examinando por Materia "Cuencas sedimentarias de Colombia"
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Ítem Análisis de procedencia en areniscas cuarzosas del devónico-carbonífero de la formación floresta (Norte de Santander) : consideraciones paleogeográficas regionales(Universidad EAFIT, 2012) Villafañez Cardona, Yohana; Cardona Molina, AgustínIn areas where the geological record is restricted to sedimentary exposures, the understanding of the geological and tectonic features can be achieved from an integrated provenance analysis of the siliciclastic rocks.Ítem Caracterización petrográfica, geoquímica y geocronológica en rocas ígneas intrusivas de la cuenca Cauca-Patía (CCP), Departamento del Cauca, Colombia(Universidad EAFIT, 2012-06-26) Jerez Heredia, Edith Katherine; Toro Villegas, Gloria ElenaSouth of Cauca-Patía basin, in Cauca department, Colombia, was sampled eleven bodies of Neogene intrusive rocks whose composition varies from diorite, granodiorite to granite. According to geochemical analysis, the samples exhibit calc-alkaline high-potassium, calc-alkaline and tholeitic affinity associated to granitoids type I. Geochronological data infer three events that have affected the area during Oligocene-Miocene, Lower Miocene-Middle Miocene and Upper Miocene, the latter correlates with the northern part of Cauca-Patía Basin. Intrusive igneous rocks coexist with Plio-Pleistocene volcanic rocks, that have had undergone several processes, but present chemical and mineralogical similarities. Key words: Cauca Patía Basin, granitoids; intrusive rocks.Ítem Estratigrafía y petrografía de las areniscas de la secuencia quebrada La Naranjala – Municipio de Fredonia miembro inferior de la formación Amagá(Universidad EAFIT, 2012) Henao Betancur, Jorge Esteban; Sierra Lopera, Gloria María