Uso combinado de técnicas de imagen 2D y 3D para el análisis icnológico de sondeos de sedimentos marinos modernos

Résumé

During last decades, ichnological analysis has become established as a very useful tool in several geological disciplines, due to its aplication on palaeoclimatic studies or hydrocarbon exploration, among others. Many of those studies are conducted on sediment cores, with their visibility limitations, especially when working with poorly consolidated modern marine sediments. In the last years, 2D images treatment has been successfully applied to improve the visibility of trace fos- sils and the identification of some ichnological features. Moreover, 3D computed tomography (CT) techniques were applied, but with less success due to the low density contrast between the biogenic structures and the host sediment. Here we show a CT processing technique that allow to isolate for the first time some structures in modern marine sediments and to identify some interesting ichnological features as the dominant orientation. Combination of this information with the data obtained using 2D images, increase the resolution of the ichnological analysis, improving the inferred interpretations.