Examinando por Materia "Cuenca del Cauca (Colombia)"

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    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 Elena
    South 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.