Examinando por Materia "Geoturism"

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    Análisis de metodologías estadísticas y morfométricas para la estimación y valoración de la geodiversidad en la cuenca del río Samacá (Boyacá), en contexto de ambientes sedimentarios-estructurales con enfoque en la gestión del patrimonio geológico
    (Universidad EAFIT, 2023) Pinzón Bocarejo, Camilo Andrés; Marín Ceron, María Isabel
    The geodiversity in Colombia is an invaluable tool for analyzing diversity patterns, especially when a unified definition is available. This study aims to highlight the importance of geodiversity by applying statistical (Valentín, 2021) and morphometric (Ramírez, 2022) approaches. This opens an educational and/or touristic perspective for several types of audiences to understand the landscape that surrounds them. Geodiversity maps and inventories of Geosites of interest (LIGs) categorized for scientific, touristic, and didactic purposes help local communities in understanding and supplying guidance to visitors, thereby creating economic development opportunities through lodging, transportation, and trained personnel. The method used, which combines a statistical approach including morphometric diversity in the Samacá River basin, allows validation of the technique in complex structurally sedimentary environments (typical in the Colombian Eastern Cordillera) and sheds light on areas of special interest in the future for geoeducation and geotourism in the Samacá River basin. The results obtained revealed spatial variability of geodiversity controlled by the structural geology and the river network in the study area.
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    Sulfur-controlled iron isotope fractionation experiments of core formation in planetary bodies
    (PERGAMON-ELSEVIER SCIENCE LTD, 2015-01-01) Shahar A.; Hillgren V.J.; Horan M.F.; Mesa-Garcia J.; Kaufman L.A.; Mock T.D.; Universidad EAFIT. Departamento de Ciencias; Geología Ambiental y Tectónica
    A series of high pressure and temperature experiments were conducted to better constrain the Fe isotope fractionation during core-mantle differentiation in planetesimal and planetary bodies. Synthetic mixtures of oxides and metal having varying amounts of sulfur, approximating terrestrial and Martian compositions, were melted at 1-2GPa and 1650°C. Iron isotopic equilibrium between the resulting metal and glass run products was verified for all experiments using the three-isotope technique. Purified Fe from metal and glass was analyzed by multiple-collector ICP-MS in high resolution mode. Iron alloy and silicate glass show a well-resolved d57Femetal-silicate of +0.12±0.04‰ in a sulfur-free system. Isotope fractionation increases with sulfur content to +0.43±0.03‰ at 18wt.% sulfur in the metal. These results cannot be easily interpreted within the context of known Fe isotope ratios in most natural samples of planetary and asteroidal mantles and therefore suggest more complex processes affected the Fe isotope fractionation therein. However, to reconcile Martian meteorite iron isotopic signatures with geophysical models using this new experimental data requires a smaller amount of sulfur in the Martian core than previous estimates, with an upper limit of ~8wt.%. © 2014 Elsevier Ltd.