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handle: 10261/86504 , 10261/86503
[ES] El análisis cuantitativo de la morfología de un sistema de canal-dique desarrollado en el Sistema Turbidítico del Magdalena (margen continental caribeño de Colombia) permite la estimación del comportamiento de los flujos turbidíticos, sus características y la comprensión de la arquitectura resultante. Regionalmente, este canal presenta un cambio brusco de su geometría en el punto de inflexión del perfil del margen continental, cambiando de un canal con diques bien desarrollados a pobremente desarrollados. La pérdida de buena parte de la fracción fina en el tramo superior del canal y la reducción de la pendiente del margen favorece el desarrollo de flujos turbidíticos ricos en arena, un descenso en la deposición por desbordamiento y por tanto un menor desarrollo de los diques. Localmente, se infieren variaciones en el comportamiento de los flujos condicionados por cambios en la pendiente o en los aportes. Estas variaciones locales dan lugar a cambios en la arquitectura del canal mediante cambios en la sinuosidad o en la erosión/agradación del tálweg
[EN] The quantitative analysis of the morphology of a channel developed in the Magdalena Turbidite System (Caribbean continental margin of Colombia) provides an estimation of flow behavior, their characteristics and an understanding of the resulting architecture. Regionally, the studied channel displays a sudden geometry change at the inflection point of the margin profile, changing from a channel with well to poorly developed levees. The loss of most of the suspended fine grained fraction along the upper reaches and the decrease in margin gradients favour a flow evolution to sand-rich turbidity currents, a decrease in spill-over deposition and a subsequent poor development of levees in the lower channel course. Locally, flow behavior variations are inferred which seems to be conditioned by slope and flow changes. Such local variations result in channel morphology changes by means of sinuosity variations or thalweg erosion/aggradation
Este trabajo se enmarcó en el proyecto SAGAS (CTM05-08071-CO3-02) financiado por el Ministerio de Educación y Ciencia
VII Congreso Geológico de España, 14-18 Julio 2008, Las Palmas de Gran Canaria.-- 4 pages, 4 figures
Peer Reviewed
Canales, Quantification, Channels, Cuantificación, Magdalena, Flujo turbidítico, Turbidity flow
Canales, Quantification, Channels, Cuantificación, Magdalena, Flujo turbidítico, Turbidity flow
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