Vulcanitas de Caicedo : evidencia de un vulcanismo paleógeno en el borde oriental de la Cordillera Occidental
dc.contributor.advisor | Vinasco Vallejo, César Javier | |
dc.contributor.advisor | Restrepo, Sergio Andrés | |
dc.contributor.author | Correa Restrepo, Tomás | |
dc.contributor.cvlac | Correa Restrepo, Tomás | spa |
dc.contributor.orcid | Correa Restrepo, Tomás [0000-0002-5905-8288] | spa |
dc.contributor.researchgate | Correa Restrepo, Tomás | spa |
dc.coverage.country | Colombia | |
dc.date.accessioned | 2025-04-21T19:10:58Z | |
dc.date.available | 2025-04-21T19:10:58Z | |
dc.date.issued | 2020-11-30 | |
dc.description | Ilustraciones, mapas | spa |
dc.description.abstract | En la presente investigación se caracterizó la geología de la unidad Vulcanitas de Caicedo, localizada en el borde oriental de la Cordillera Occidental de Colombia, entre los municipios de Caicedo y Anzá (Antioquia). Durante la caracterización se realizó una cartografía geológica a escala 1:25.000, se levantó un segmento de columna estratigráfica, se aplicaron técnicas petrográficas, geoquímicas (roca total y química mineral de piroxenos), se analizaron imágenes SEM-BS y SEM-CL de circones y se realizaron dataciones LA-ICP-MS U-Pb en circón. Las rocas corresponden principalmente a hialoclastitas, formadas por eventos volcánicos submarinos que tuvieron lugar durante el Paleógeno en un bloque acrecionado del CLIP al Bloque Andino. Los resultados químicos evidencian una alteración relacionada con la interacción de las rocas al entrar en contacto con el agua de mar. El análisis de elementos trazas y tierras raras muestra que las rocas representativas de la unidad tienen características geoquímicas de rocas de arco volcánico. El análisis de química mineral en piroxenos, muestran que son menos diferenciadas (más primitivas) que la Formación Barroso; adicionalmente, sugiere que los piroxenos de la unidad cristalizaron en una sola etapa, mientras que los de la Formación Barroso lo hicieron en más de una etapa. Las abundantes edades heredadas encontradas, que van desde el Cretácico hasta el Meso-proterozoico, demuestran que las edades Jurásicas publicadas por otros autores previamente en la unidad corresponden a edades heredadas y no a edades de cristalización. Los análisis de imágenes SEM-BS muestran diferencias morfológicas notables en circones representativos de diferentes edades. Los resultados encontrados en esta investigación evidencian la presencia de un arco volcánico Paleógeno en el borde oriental de la Cordillera Occidental del cual no se tenía conocimiento. De esta manera se reconocen cinco cinturones de arco magmático en el Occidente Colombiano y en la Cordillera Central, que de Occidente a Oriente son Complejo San Blas (Batolito de Acandí y rocas volcánicas asociadas), Complejo SW (Complejo Timbiquí), Complejo Santa Cecilia La Equis, Vulcanitas de Caicedo y las unidades Paleógenas de la Cordillera Central. El modelo propuesto incorpora la posibilidad de una subducción tipo flat slab del CLIP bajo el Bloque Andino para explicar la ocurrencia de un magmatismo en el mismo período tanto en el borde oriental de la Cordillera Occidental como en la Cordillera Central, con una separación actual de aproximadamente 100 km. Estos resultados exigen la revisión de los modelos geológicos evolutivos existentes para el Occidente Colombiano. (Tomado de la fuente) | spa |
dc.description.abstract | The present investigation characterized the geology of the Caicedo Vulcanites unit, located on the eastern edge of the Western Cordillera of Colombia, between the municipalities of Caicedo and Anzá. During the characterization, a 1:25,000 scale geologic mapping was made, a stratigraphic column segment was raised, petrographic and geochemical techniques were applied (total rock and pyroxene mineral chemistry), SEM-BS and SEMCL zircon images were analyzed, and LA-ICP-MS U-Pb zircon data were made. From the analytical results it was possible to establish that the rocks that make up the Caicedo Vulcanites are chemically and geochronologically different from the Barroso Formation. The rocks correspond mainly to hyaloclastites, formed by underwater volcanic events that took place during the Paleogene in an accreted block of the CLIP to the Andean Block. The chemical results show an alteration related to the interaction of the rocks when they came into contact with seawater. Trace element and rare earth analysis show that the representative rocks of the unit have geochemical characteristics of volcanic arc rocks. Mineral chemistry analysis of pyroxenes shows that they are less differentiated (more primitive) than the Barroso Formation; additionally, it suggests that the pyroxenes of the unit crystallized in a single stage, while those of the Barroso Formation crystallized in more than one stage. The abundant inherited ages found, ranging from the Cretaceous to the Mesoproterozoic, show that the Jurassic ages previously published by other authors for the unit correspond to inherited ages and not to crystallization ages. SEM-BS image analyses show remarkable morphological differences in zircons representative of different ages. The results found in this research, evidence the presence of a Paleogene volcanic arc on the eastern edge of the Western Cordillera that was not known. This way, five magmatic arc belts are recognized in the Colombian West and Central Cordillera, which from West to East are San Blas Complex (Acandí Batholith and associated volcanic rocks), SW Complex (Timbiquí Complex), Santa Cecilia La Equis Complex, Caicedo Vulcanites and the Paleogene units of the Central Cordillera. The proposed model incorporates the possibility VI II Vulcanitas de Caicedo: Evidencia de un vulcanismo Paleógeno en el borde oriental de la Cordillera Occidental of a flat slab type subduction of the CLIP under the Andean Block to explain the occurrence of magmatism in the same period both in the eastern edge of the Western Cordillera and in the Central Cordillera, with a current separation of approximately 100 km. These results demand the revision of the existing evolutionary geological models for the Colombian West. | eng |
dc.description.curriculararea | Recursos Minerales.Sede Medellín | spa |
dc.description.degreelevel | Maestría | spa |
dc.description.degreename | Magíster en Ingeniería - Recursos Minerales | spa |
dc.format.extent | 145 páginas | spa |
dc.format.mimetype | application/pdf | spa |
dc.identifier.instname | Universidad Nacional de Colombia | spa |
dc.identifier.reponame | Repositorio Institucional Universidad Nacional de Colombia | spa |
dc.identifier.repourl | https://repositorio.unal.edu.co/ | spa |
dc.identifier.uri | https://repositorio.unal.edu.co/handle/unal/87989 | |
dc.language.iso | spa | spa |
dc.publisher | Universidad Nacional de Colombia Sede Medellín | spa |
dc.publisher.branch | Universidad Nacional de Colombia - Sede Medellín | spa |
dc.publisher.faculty | Facultad de Minas | spa |
dc.publisher.place | Medellín, Colombia | spa |
dc.publisher.program | Medellín - Minas - Maestría en Ingeniería - Recursos Minerales | spa |
dc.relation.indexed | LaReferencia | spa |
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dc.relation.references | Villagómez, D., Spikings, R., Magna, T., Kammer, A., Winkler, W., & Beltrán, A. (2011). Geochronology, geochemistry and tectonic evolution of the Western and Central cordilleras of Colombia. Lithos, 219–221. | spa |
dc.relation.references | Villarraga, C. (2016). Temporalidad y características geoquímicas del vulcanismo cretácico del sector norte de la Cordillera Occidental Colombiana: implicaciones tectónicas. Centro de Investigación Científica y de Educación Superior de Ensenada, Baja California. | spa |
dc.relation.references | Vinasco, C. J., Cordani, U. G., González, H., Weber, M., & Pelaez, C. (2006). Geochronological, isotopic, and geochemical data from Permo-Triassic granitic gneisses and granitoids of the Colombian Central Andes. Journal of South American Earth Sciences, 21(4), 355–371. https://doi.org/10.1016/j.jsames.2006.07.007 | spa |
dc.relation.references | Whattam, S., & Stern, R. (2015). Late Cretaceous plume-induced subduction initiation along the southern margin of the Caribbean and NW South América: The first documented example with implications for the onset of plate tectonics. Gondwana Research, 27, 38–63. | spa |
dc.relation.references | Wiedenbeck, M., Allé, P., Corfu, F., Griffin, W. L., Meier, M., Oberli, F., Quadt, A. Von, Roddick, J. C., & Spiegel, W. (1995). Three Natural Zircon Standards for U‐Th‐Pb, Lu‐Hf, Trace Element and Ree Analyses. Geostandards Newsletter, 19(1), 1–23. https://doi.org/10.1111/j.1751-908X.1995.tb00147. | spa |
dc.relation.references | Winchester, J. A., & Floyd, P. A. (1977). Geochemical discrimination of different magma series and their differentiation products using immobile elements. Chemical Geology, 20(C), 325–343. https://doi.org/10.1016/0009-2541(77)90057-2 | spa |
dc.relation.references | Wood, D. A. (1980). The application of a Th‒Hf‒Ta diagram to problems of tectonomagmatic classification and to establishing the nature of crustal contamination of basaltic lavas of the British Tertiary Volcanic Province. Earth and Planetary Science Letters, 50(1), 11–30. https://doi.org/10.1016/0012-821X(80)90116-8 | spa |
dc.relation.references | Zapata-Villada, J. P. (2018). Registro magmático y metamórfico en una zona de colisión Cretácica en la margen occidental de la Cordillera Central: Implicaciones tectónicas en los Andes del Norte. Trabajo de Grado. Universidad Nacional de Colombia sede Medellín. | spa |
dc.rights.accessrights | info:eu-repo/semantics/openAccess | spa |
dc.rights.license | Reconocimiento 4.0 Internacional | spa |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | spa |
dc.subject.ddc | 550 - Ciencias de la tierra::551 - Geología, hidrología, meteorología | spa |
dc.subject.lemb | Rocas ígneas | |
dc.subject.lemb | Geoquímica | |
dc.subject.lemb | Rocas - Análisis | |
dc.subject.lemb | Petrología | |
dc.subject.lemb | Vulcanismo - Colombia | |
dc.subject.proposal | Andes del Norte | spa |
dc.subject.proposal | CLIP | spa |
dc.subject.proposal | Paleógeno | spa |
dc.subject.proposal | Hialoclastitas | spa |
dc.subject.proposal | Vulcanismo Submarino | spa |
dc.subject.proposal | Química Mineral de Piroxenos | spa |
dc.subject.proposal | Datación LA-ICP-MS U-Pb en circón | spa |
dc.subject.proposal | Imágenes SEM-CL y SEM-BS | spa |
dc.subject.proposal | Subducción Plana | spa |
dc.subject.proposal | Northern Andes | eng |
dc.subject.proposal | Paleogene | eng |
dc.subject.proposal | Hyaloclastites | eng |
dc.subject.proposal | Underwater Volcanism | eng |
dc.subject.proposal | Pyroxene Mineral Chemistry | eng |
dc.subject.proposal | LA-ICP-MS U-Pb in Zircon Dating | eng |
dc.subject.proposal | SEM-CL and SEM-BS Imaging | eng |
dc.subject.proposal | Flat-Slab Subduction | eng |
dc.title | Vulcanitas de Caicedo : evidencia de un vulcanismo paleógeno en el borde oriental de la Cordillera Occidental | spa |
dc.title.translated | Caicedo vulcanites: evidence of paleogene volcanism on the eastern edge of the Western Cordillera | eng |
dc.type | Trabajo de grado - Maestría | spa |
dc.type.coar | http://purl.org/coar/resource_type/c_bdcc | spa |
dc.type.coarversion | http://purl.org/coar/version/c_ab4af688f83e57aa | spa |
dc.type.content | Text | spa |
dc.type.driver | info:eu-repo/semantics/masterThesis | spa |
dc.type.redcol | http://purl.org/redcol/resource_type/TM | spa |
dc.type.version | info:eu-repo/semantics/acceptedVersion | spa |
dcterms.audience.professionaldevelopment | Estudiantes | spa |
dcterms.audience.professionaldevelopment | Investigadores | spa |
dcterms.audience.professionaldevelopment | Maestros | spa |
oaire.accessrights | http://purl.org/coar/access_right/c_abf2 | spa |
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