Examinando por Materia "GEOLOGÍA"
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Ítem A review of Holocene climate-change signatures of SW Antioquian region : Northwestern Colombian Andes(Universidad EAFIT, 2019) Olivella Gallego, Ruben Rodrigo; Marín Ceron, María IsabelÍtem A review on the Segovia Batholith and its thermal history, implications for metallogenesis in the Segovia-Remedios Mining District(Universidad Eafit, 2020) Malo González, Camila Andrea; Marín Cerón, María IsabelÍtem Agrogeología del silicio : comprensión de los materiales geológicos y la formación de suelos para el fortalecimiento de la agricultura(Universidad EAFIT, 2023) Barrientos Acevedo, Iván Andrés; Hernández Pérez, María IsabelThe characteristics of silicon fertilizers depend on aspects related to their raw materials, manufacturing process, physical presentation and chemical composition. It is evident that the application of silicon in agriculture generates significant benefits for plants by improving their resistance to biotic and abiotic stress, and enhancing the absorption of essential nutrients. These products are primarily derived from inorganic silicates, extracted in their mineral forms and processed to convert them into soluble forms, which, when added to the soil, become silicic acid, a bioavailable source for plants. The stability of silicon fertilizers is a critical aspect, and their effectiveness may vary depending on soil conditions and the type of crop. The edaphological heterogeneity in Colombia, with various soil types and climatic conditions, creates a favorable environment for the cultivation of silicon-accumulating plants, such as rice, sugarcane, corn, wheat, cassava, potatoes, soybeans, and sugar beets. Understanding the mechanisms of silicon absorption and transportation, the appropriate choice of fertilizers, and the edaphological variability in agricultural production are key factors in the effective application of silicon for the benefit of agriculture.Ítem Análisis de la gestión del riesgo en el Valle de Aburrá a partir de los Planes Municipales de Gestión del Riesgo de Desastres y los Planes de Ordenamiento Territorial(Universidad EAFIT, 2022) Toro Gutiérrez, Pedro; Gamboa Ramírez, Marco FidelThe development in this project was an analysis of the articulation of planning instruments for risk management in the municipalities that make up the Valle de Aburrá metropolitan area was carried out, as well as their inter-municipal relationship to address the risk scenarios that compromise bordering areas, in order to make a matrix with a numerical factor that assesses the most important aspects of each instrument and thus discuss them and draw conclusions, in the analysis process it was observed that some municipalities do not relate their planning instruments to the risk management, are done independently and this causes decision-making to change, this lacks are also observed in inter-municipal risk management, which makes it difficult to reduce and prevent disasters that occur in the territory that compromise two or more municipalities.Ítem Análisis de las variaciones en la distribución, profundidad y fuente de las rocas plutónicas jurásicas de la Cordillera Central de Colombia y sus implicaciones en la evolución del Norte de los Andes(Universidad EAFIT, 2019) Cadavid Isaza, Camilo; Madrid Hincapié, Lorena; Bustamante Londoño, CamiloÍtem Análisis de procedencia sedimentaria : minerales densos y petrografía sedimentaria en las formaciones Payandé, Saldaña, Caballos y Grupo Honda, Valle Superior del Magdalena(Universidad EAFIT, 2020) Barragán Triana, Diego Fernando; Cardona Ocampo, Mariana; Beltrán Triviño, AlejandroÍtem Análisis multi-temporal de la erosión en el área protegida Ensenada de Rionegro (Antioquia) con miras a geoconservación(Universidad EAFIT, 2020) Zapata Herrera, Juan Fernando; Marín Cerón, María IsabelÍtem Caracterización de la Dunita de Medellín como material de balasto ferroviario(Universidad EAFIT, 2019) Patiño Lara, Johan Sebastián; Villa Pérez, Nicol; Beltrán Triviño, Alejandro IvánÍtem Caracterización geomorfológica a lo largo de la trayectoria de escorrentía para la estimación de la propagación de movimientos en masa(Universidad EAFIT, 2024) Martínez Osorio, Johan Steven; Ruiz Restrepo, Daniel FelipeLandslides generally propagate certain distances, threatening the lives of people and/or infrastructure not only at the origin site of the landslide but also along the propagation trajectory, therefore, it is necessary to estimate the maximum distance a mass could travel to assess the potential impact zone. There are empirical and numerical methods for estimating the potential propagation distance, with numerical methods being limited to specific landslides and potentially costly and time-consuming. Hence, empirical methods are useful for regional-scale studies, primarily relying on geometric correlations from the landslide origin point, but they do not consider geomorphological characteristics along the propagation trajectory. In this study, ten geomorphological characteristics (referred to as topographic barriers) were identified along the runout trajectory of landslides, significantly influencing the determination of the maximum reach distance of the mass. Since the influence percentage of these barriers depends on their location relative to the landslide's origin zone, a dominant weight with respect to the maximum propagation distance could not be established for most, but applicable relationships exist for curves, deviations, and opposing walls. Likewise, it is recommended to consider all geomorphological features for runoff analyses.Ítem Caracterización morfológica del depósito vetiforme epitermal en el NE del Batolito Antioqueño – Mina Los Balsos, Yolombó – Antioquia(Universidad EAFIT, 2023) Cataño Soto, Cristian Camilo; Marín Cerón, María Isabel; Marín Cerón, María IsabelIt is important to understand the morphology of a vein-type mineralization when seeking to estimate resources, as this knowledge supports subsequent decision-making in exploration and extraction processes, especially when structural factors play a significant role in mineral accumulation. In order to provide a tool that optimizes the exploration processes of the Los Balsos Mine project, a morphological model is being developed for the majority of structures intercepted by its tunneling, which serves as a basis for understanding the spatial behavior of veins, their hierarchization, spatial interaction, and their relationship with regional events. This information can be complemented with petrographic data in future projects. The study area is located in the northeastern part of the Antioquian batholith, in the youngest region of the body, where quartz vein deposits accompanied by sulfides are present and displaced by the interference zone of the Palestina Fault. These structures suffer from significant deficiencies in geometric and structural characterization, mainly due to the challenging accessibility of the area, which is mostly exploited by informal projects and lacks technical information in the public domain. That is why detailed mapping supported by samples and structural data was carried out, digitized into maps (1:500 and 1:50) that serve as the basis for prospective models. These models propose future exploration targets, which in turn facilitate economically and scientifically significant decision-making.Ítem Caracterización petrográfica y geoquímica de las rocas plutónicas del sector Alto de Chuare – Municipio de López de Micay, Departamento del Cauca, Colombia(Universidad EAFIT, 2019) Martínez Castaño, Karina; Martínez Castaño, Christopher; Marín Ceron, María IsabelÍtem Caracterización petroquímica del deposito VMS en la Mina el Roble(Universidad EAFIT, 2021) Plata Otero, Pedro Jose; Monroy Reyes, Diego Alejandro; Marín Cerón, María IsabelÍtem Correlación estratigráfica de la secuencia Pintajá (Sector Quebradas Pintajá,Puria y Niverengo) y la Formación Amagá.(2020-12-02) Muñoz Múnera, Tatiana; Marín Ceron, Maria IsabelThe integrated study of the Pintajá Sequence (SP, Cauca del Río Cauca sector, Anzá municipality) provides data and tools for the analysis of sedimentary and tectonic processes that influenced its formation and its relationship with contemporary sedimentary formations in the Amagá basin such as the Amagá Formation (FA). The AF and SP are controlled by an extensive deformation zone related to the Romeral-Cauca deformation zone, through which different tectonic sub-basins have been formed and segmented during the Cenozoic. Using the litho and bio-stratigraphic analysis of the SP, (geological cartography (1:25,000), stratigraphic and facial analysis (1:100)) and the comparative analysis between the SP and the AF (using secondary dataset), it was possible to conclude that, the sequence Pintajá, Sector Quebradas Pintajá, Puria and Niverengo - Anzá (Antioquia), is characterized by having a facial association of braided rivers towards the Oligocene-Miocene boundary, separated from the FA Lower Member (Eocene-Oligocene), by a contact failed. Additionally, the SP is not part of the Superior Member of the FA (unit 4, with facial similarities), differing from it in its pollen content and presence of lignite-like organic matter. Therefore, it is proposed that the SP was deposited from the reworking of the Lower Member of the Amagá Formation, associated with the Oligo-Miocene event controlled by local movements of blocks associated with the Proto-Cordillera Occidental.Ítem ¿Cuál es el efecto del ENOS en los caudales de los ríos en Colombia?(Universidad EAFIT, 2024) Ceballos Restrepo, Juliana; Restrepo Angel, Juan DaríoÍtem Cuantificación de la geodiversidad en la cuenta de los ríos Badillo, Guatapurí, Manaure y Espíritu Santo; PNNN Sierra Nevada de Santa Marta (SNSM) y Serranía del Perijá (SP)(Universidad EAFIT, 2020) Valencia Jaramillo, Manuela; Castañeda Molina, Daniel Andres; Marín Cerón, María IsabelÍtem Dinámicas de diversidad del grupo decápoda en el neotrópico durante los últimos 135 millones de años(Universidad EAFIT, 2019) Contreras Vera, Santiago León; Cárdenas Rozo, Andrés LeonardoThis study evaluates statistically the relation between the dynamics associated to diversity for decapods during the las 135 Ma. Analyzing their relationship with global patterns and their geological context. Our results indicate a strong correlation between the extinction and origination rates, with a maximum during the climate period known as “Green House” (100 – 37.5 Ma), which indicates an increase in the effects from biotic factors such as interspecies competition. Furthermore, we observed extinction events overlapping with global climatic events (OAEs), which in turn indicates a control from abiotic factors in these dynamics. Moreover, we observe a relation between intervals of reef development during the Cretaceous and origination events during the same periods. These patterns can be interpreted as a result of the complicated logistic growth model, in which both biotic and abiotic factor play a fundamental role in evolutionary process across time.Ítem Los Dinoflagelados del Mioceno Medio Alto - Mioceno Superior del Caribe Colombiano: taxonomía, bioestratigrafía e implicaciones geológicas(Universidad EAFIT, 2006) Medina Campos, Liliana; Martínez Rodríguez, José IgnacioDel estudio palinológico del intervalo Mioceno Medio alto – Mioceno Superior, para el Caribe Colombiano se reporta, por primera vez, la ocurrencia de 42 morfotipos de dinoflagelados (22 Gonyaulacales, 19 Peridiniales y 1 del tipo Mixto) con una mayor abundancia de Gonyaulacales en el Valle Inferior del Magdalena y mayor abundancia y diversidad de Peridiniales en la Baja Guajira, coincidiendo esto último, con la diversificación de los Peridiniales durante el Neógeno -- Se reconocen 6 posibles zonas de dinoflagelados en el intervalo Mioceno Medio alto – Mioceno Superior, incrementando así la resolución bioestratigráfica basada en foraminíferos planctónicos y polen -- La variación del índice Peridiniales/Gonyaulacales (P/G), en relación con el porcentaje de Globorotálidos y Neogloboquadrínidos (foraminíferos de aguas profundas), sugieren el sostenimiento de condiciones ricas en nutrientes asociadas con descargas fluviales en el Valle Inferior del Magdalena y sistemas de surgencia en la Baja Guajira -- Las condiciones paleoceanográficas en el área de la Baja Guajira durante el Mioceno Tardío habrían sido análogas a las actuales, sugiriendo así el posible inicio del actual sistema de surgencia de la Guajira para este tiempo -- Para el Valle Inferior del Magdalena se sugieren ambientes de depósito someros para la Unidad Porquero Superior durante el Mioceno Medio tardío, y ambientes de paleodelta para la Unidad Tubará durante el Mioceno Tardío -- En la Baja Guajira se sugieren ambientes de plataforma en la parte alta de la Formación Jimol durante el Mioceno Medio, con ambientes someros (plataforma interna?) hacia la Formación Castilletes durante el Mioceno TardíoÍtem Diseño de un manual de geo-metalurgia como herramienta para los procesos de enseñanza-aprendizaje en los procesos extractivos del cobre(Universidad Eafit, 2020) Zuluaga Zapata, Karen Johana; Marín Cerón, Maria Isabel; Garrido Palma, Mauricio NicolásÍtem Elaboración del plan municipal de gestión de riesgos de desastres naturales del Municipio de Abejorral, Antioquia(Universidad Eafit, 2020) Leal Carreño, Marzia Valentina; Jaramillo Montoya, Manuela; Gamboa Ramírez, Marco FidelÍtem ¿Es el Escudo de Guyana la principal fuente de aporte sedimentario a la cuenca del VMM durante el intervalo Cretácico-Neógeno? implicaciones en la paleogeografía y el levantamiento de los Andes colombianos(Universidad EAFIT, 2020) Rodríguez Caicedo, Angie Karolain; Duque Carrillo, Daniel Andrés; Beltrán Triviño, AlejandroDifferent tectonic processes are acting over the northern margin over the Andean Cordillera, where both the subduction of the Nazca plate, as well as the compression processes that gave rise of the tectonic inversion of the Easter Cordillera in Colombia can be highlighted. In areas like the Middle Magdalena Valley, this inversion generated several changes in the sediments accumulation system, changes that can be identify by provenance analysis. In this project the provenance analysis of Olini Group, Set Ti, Ti2 and Mesa Formation was obtain, which the outcrops are between the Middle Magdalena Valley and the western flank of the Eastern Cordillera, between the departmental limits of Boyacá and Santander. These analyzes indicates that the main areas of contribution of these formations are possibly the Central Cordillera and the Guyana Shield, but due to the high tectonic activity that occurs at the end of the Cretaceous and during the Cenozoic, sediment reworking occurred on the easter margin of Colombia associated with the uplift of the Eastern Cordillera.