Análisis fractal de las brechas hidrotermales en ambos cinturones esmeraldíferos : Mecanismos de brechamiento y evolución

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dc.contributor.advisorKammer, Andreasspa
dc.contributor.authorBetancur Acevedo, Camilo Andresspa
dc.contributor.cvlacBetancur Acevedo, Camilo Andrés [0000108780]spa
dc.contributor.googlescholarBetancur Acevedo, Camilo [https://scholar.google.com/citations?user=2vWYTUcAAAAJ]spa
dc.contributor.orcidBetancur Acevedo, Camilo Andrés [0000-0001-7325-2223]spa
dc.contributor.researcherCDTEC
dc.contributor.researchgateBetancur Acevedo, Camilo Andrés [https://www.researchgate.net/profile/Camilo-Betancur-Acevedo]spa
dc.contributor.researchgroupGrupo de Geología Estructural y Tectónica Aplicadaspa
dc.contributor.researchgroupCentro de Desarrollo Tecnológico de la Esmeralda Colombiana CDTECspa
dc.date.accessioned2025-07-17T00:37:51Z
dc.date.available2025-07-17T00:37:51Z
dc.date.issued2025-07-16
dc.descriptionilustraciones, diagramas, fotografías, mapasspa
dc.description.abstractSe determinaron los mecanismos que dieron lugar al brechamiento que permitió la migración de los fluidos hidrotermales generadores de las esmeraldas colombianas en ambos cinturones esmeraldíferos. A partir del desarrollo de un análisis petrográfico se observaron los diferentes eventos hidrotermales que actuaron en estos cinturones. Posteriormente, se hizo un análisis de espectroscopía Raman en la fase gaseosa presente en las inclusiones fluidas, para determinar las bandas que componen el doblete de Fermi en minerales de las diferentes etapas hidrotermales, con la intención de calcular un acercamiento a la presión a la que fue sometida la roca en dichos eventos. Finalmente, partiendo de un análisis fractal de las brechas presentes en la zona, se determinaron los mecanismos de brechamiento desarrollados en ambos cinturones esmeraldíferos a lo largo de la historia hidrotermal. Aunque ambos cinturones presentaron eventos hidrotermales similares, el cinturón oriental presenta en general presiones más bajas para los eventos hidrotermales en comparación con el occidental. Además, en este cinturón, los mecanismos de brechamiento muestran un evento corrosivo de mayor intensidad y con una energía mecánica menor que en el occidental. Por último, la presencia de procesos de fluidización en el cinturón oriental (al igual que en el occidental) sugiere la posibilidad de una migración de clastos predominantemente asistida por fluidos, en lugar de una migración impulsada por halocinesis. (Texto tomado de la fuente).spa
dc.description.abstractThe present study investigated the breccia mechanisms that allowed emerald-bearing hydrothermal fluids to migrate in both emerald belts in Colombia. Three different hydrothermal events were determined using petrographic analysis. Subsequently, Fermi diad bands were obtained by Raman spectroscopy in gaseous inclusions to calculate the pressure of the rock in minerals of those events. Finally, based on a fractal analysis of the breccias present in the area, the brecciation mechanisms developed in both emerald belts throughout hydrothermal history were determined. Although both belts experienced similar hydrothermal events, the eastern belt generally exhibits lower pressures for hydrothermal events compared to the western belt. Moreover, in the eastern belt, brecciation mechanisms indicate a more intense corrosive event with lower mechanical energy than in the western belt. Lastly, the presence of fluidization processes in the eastern belt (as well as in the western belt) suggests the possibility of clast migration predominantly assisted by fluids, rather than migration driven by halokinesis.eng
dc.description.degreelevelMaestríaspa
dc.description.degreenameMagíster en Ciencias - Geologíaspa
dc.description.methodsLa investigación integró técnicas petrográficas, análisis fractal y espectroscopía Raman para caracterizar las brechas hidrotermales de ambos cinturones esmeraldíferos. Se realizaron observaciones petrográficas en 74 secciones delgadas utilizando microscopios ópticos ZEISS Axio Scope A1 y Olympus BX51, con el fin de establecer la secuencia paragénetica. Posteriormente, se desarrollaron análisis fractales sobre 28 muestras de brechas (16 del cinturón occidental y 12 del oriental), cuantificando más de 3.000 fragmentos en total. Las imágenes fueron procesadas mediante el software ImageJ y los análisis se llevaron a cabo utilizando los métodos de conteo de cajas (Minkowski–Bouligand) y mapeo de distancias euclidianas, automatizados con scripts desarrollados en Matlab. Además, se empleó espectroscopía Raman (Horiba LabRAM HR Evolution) para estudiar inclusiones fluidas gaseosas ricas en CO₂, con el objetivo de calcular el doblete de Fermi y determinar la presión de atrapamiento. Se adquirieron y procesaron más de 550 espectros, aplicando corrección de línea base, análisis de picos y cálculos de presión con herramientas de procesamiento en Matlab.spa
dc.description.researchareaGeología estructuralspa
dc.format.extent76 páginasspa
dc.format.mimetypeapplication/pdfspa
dc.identifier.instnameUniversidad Nacional de Colombiaspa
dc.identifier.reponameRepositorio Institucional Universidad Nacional de Colombiaspa
dc.identifier.repourlhttps://repositorio.unal.edu.co/spa
dc.identifier.urihttps://repositorio.unal.edu.co/handle/unal/88353
dc.language.isospaspa
dc.publisherUniversidad Nacional de Colombiaspa
dc.publisher.branchUniversidad Nacional de Colombia - Sede Bogotáspa
dc.publisher.departmentDepartamento de Geocienciasspa
dc.publisher.facultyFacultad de Cienciasspa
dc.publisher.placeBogotá, Colombiaspa
dc.publisher.programBogotá - Ciencias - Maestría en Ciencias - Geologíaspa
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dc.rights.accessrightsinfo:eu-repo/semantics/openAccessspa
dc.rights.licenseAtribución-NoComercial-SinDerivadas 4.0 Internacionalspa
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/spa
dc.subject.ddc550 - Ciencias de la tierra::553 - Geología económicaspa
dc.subject.proposalEsmeraldasspa
dc.subject.proposalBrechamientospa
dc.subject.proposalAnálisis fractalspa
dc.subject.proposalDoblete Fermispa
dc.subject.proposalEventos hidrotermalesspa
dc.subject.proposalEmeraldseng
dc.subject.proposalBreccia mechanismseng
dc.subject.proposalFractal analysiseng
dc.subject.proposalFermi diadeng
dc.subject.proposalHydrothermal eventseng
dc.subject.wikidatafluidodinámicaspa
dc.subject.wikidatafluid dynamicseng
dc.subject.wikidatamineralogíaspa
dc.subject.wikidatamineralogyeng
dc.subject.wikidataespectroscopiaspa
dc.subject.wikidataspectroscopyeng
dc.subject.wikidataanálisis químicospa
dc.subject.wikidatachemical analysiseng
dc.titleAnálisis fractal de las brechas hidrotermales en ambos cinturones esmeraldíferos : Mecanismos de brechamiento y evoluciónspa
dc.title.translatedFractal analysis of hydrothermal breccias in both emerald belts: brecciation mechanisms and evolutioneng
dc.typeTrabajo de grado - Maestríaspa
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