Tectono-magmatic analysis of the Juanambú Canyon, Southwestern Colombian Andes
This contribution integrates petrological and field relation constrains from the geological record of the Juanambú River Canyon and provides another important record of the Late Cretaceous to Miocene tectono-magmatic evolution of the southwestern margin of the Colombian Andes. Furthermore, the first...
- Autores:
-
Delgado Balaguera, Sofía Margarita
- Tipo de recurso:
- Trabajo de grado de pregrado
- Fecha de publicación:
- 2018
- Institución:
- Universidad de los Andes
- Repositorio:
- Séneca: repositorio Uniandes
- Idioma:
- eng
- OAI Identifier:
- oai:repositorio.uniandes.edu.co:1992/40432
- Acceso en línea:
- http://hdl.handle.net/1992/40432
- Palabra clave:
- Geología
Geociencias
- Rights
- openAccess
- License
- http://creativecommons.org/licenses/by-nc-sa/4.0/
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|
dc.title.es_CO.fl_str_mv |
Tectono-magmatic analysis of the Juanambú Canyon, Southwestern Colombian Andes |
title |
Tectono-magmatic analysis of the Juanambú Canyon, Southwestern Colombian Andes |
spellingShingle |
Tectono-magmatic analysis of the Juanambú Canyon, Southwestern Colombian Andes Geología Geociencias |
title_short |
Tectono-magmatic analysis of the Juanambú Canyon, Southwestern Colombian Andes |
title_full |
Tectono-magmatic analysis of the Juanambú Canyon, Southwestern Colombian Andes |
title_fullStr |
Tectono-magmatic analysis of the Juanambú Canyon, Southwestern Colombian Andes |
title_full_unstemmed |
Tectono-magmatic analysis of the Juanambú Canyon, Southwestern Colombian Andes |
title_sort |
Tectono-magmatic analysis of the Juanambú Canyon, Southwestern Colombian Andes |
dc.creator.fl_str_mv |
Delgado Balaguera, Sofía Margarita |
dc.contributor.advisor.none.fl_str_mv |
Rojas-Agramonte, Yamirka Rodríguez Vargas, Andrés Ignacio |
dc.contributor.author.none.fl_str_mv |
Delgado Balaguera, Sofía Margarita |
dc.contributor.jury.none.fl_str_mv |
Pardo Villaveces, Natalia |
dc.subject.keyword.es_CO.fl_str_mv |
Geología |
topic |
Geología Geociencias |
dc.subject.themes.none.fl_str_mv |
Geociencias |
description |
This contribution integrates petrological and field relation constrains from the geological record of the Juanambú River Canyon and provides another important record of the Late Cretaceous to Miocene tectono-magmatic evolution of the southwestern margin of the Colombian Andes. Furthermore, the first 1:25.000 geological cartographic chart is presented within this project and it could be enhanced and used as a basis for the territorial planning, the evaluation of natural resources and the recognition of geological risks. Two intrusive bodies were recognized in the study area: First, a Late Oligocene to Early Miocene phaneritic-tonalitic rock body mainly composed by plagioclase with complex zonation, variable quantities of mafic minerals and lesser amounts of quartz. Second, a Middle to Late Miocene porphyritic intermediate to acid rock intruding the tonalitic bodies and mainly constituted by plagioclase and quartz, and in lesser amounts hydrated amphibole and biotite filling interstitial spaces. Granitoids are characterized by high contents of silica SiO_2 (66-70 wt.%), with a metaluminous to slightly peraluminous composition (ASI= 0.96-1.03). The analyzed samples exhibit a calc-alkaline character and show an intermediate to acid composition, ranging from granodiorites to granites. Tectonic classification diagrams also suggest a volcanic arc affinity related to a subduction tectonic setting. Eastward migration of the magmatic arc has been suggested for northern and central segments of the Colombian Andes, nevertheless, in the southern Juanambú Canyon region the longitudinal displacement of magmatism is not recognized. The observed spatial framework in the canyon could be related to a late migration of the magmatism over a stationed axis for southern parts of the Colombian Andes or to a subduction edge with convex center and concave extremes geometrical configuration which induced a less prominent slab dip to the southern segment represented by this region |
publishDate |
2018 |
dc.date.issued.none.fl_str_mv |
2018 |
dc.date.accessioned.none.fl_str_mv |
2020-06-10T17:13:38Z |
dc.date.available.none.fl_str_mv |
2020-06-10T17:13:38Z |
dc.type.spa.fl_str_mv |
Trabajo de grado - Pregrado |
dc.type.coarversion.fl_str_mv |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
dc.type.driver.spa.fl_str_mv |
info:eu-repo/semantics/bachelorThesis |
dc.type.coar.spa.fl_str_mv |
http://purl.org/coar/resource_type/c_7a1f |
dc.type.content.spa.fl_str_mv |
Text |
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http://purl.org/redcol/resource_type/TP |
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http://purl.org/coar/resource_type/c_7a1f |
dc.identifier.uri.none.fl_str_mv |
http://hdl.handle.net/1992/40432 |
dc.identifier.pdf.none.fl_str_mv |
u808388.pdf |
dc.identifier.instname.spa.fl_str_mv |
instname:Universidad de los Andes |
dc.identifier.reponame.spa.fl_str_mv |
reponame:Repositorio Institucional Séneca |
dc.identifier.repourl.spa.fl_str_mv |
repourl:https://repositorio.uniandes.edu.co/ |
url |
http://hdl.handle.net/1992/40432 |
identifier_str_mv |
u808388.pdf instname:Universidad de los Andes reponame:Repositorio Institucional Séneca repourl:https://repositorio.uniandes.edu.co/ |
dc.language.iso.es_CO.fl_str_mv |
eng |
language |
eng |
dc.rights.uri.*.fl_str_mv |
http://creativecommons.org/licenses/by-nc-sa/4.0/ |
dc.rights.accessrights.spa.fl_str_mv |
info:eu-repo/semantics/openAccess |
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http://purl.org/coar/access_right/c_abf2 |
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http://creativecommons.org/licenses/by-nc-sa/4.0/ http://purl.org/coar/access_right/c_abf2 |
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openAccess |
dc.format.extent.es_CO.fl_str_mv |
32 hojas |
dc.format.mimetype.es_CO.fl_str_mv |
application/pdf |
dc.publisher.es_CO.fl_str_mv |
Universidad de los Andes |
dc.publisher.program.es_CO.fl_str_mv |
Geociencias |
dc.publisher.faculty.es_CO.fl_str_mv |
Facultad de Ciencias |
dc.publisher.department.es_CO.fl_str_mv |
Departamento de Geociencias |
dc.source.es_CO.fl_str_mv |
instname:Universidad de los Andes reponame:Repositorio Institucional Séneca |
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Universidad de los Andes |
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Universidad de los Andes |
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Repositorio Institucional Séneca |
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Repositorio Institucional Séneca |
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Al consultar y hacer uso de este recurso, está aceptando las condiciones de uso establecidas por los autores.http://creativecommons.org/licenses/by-nc-sa/4.0/info:eu-repo/semantics/openAccesshttp://purl.org/coar/access_right/c_abf2Rojas-Agramonte, Yamirka01921cf8-26dc-42c5-9dbc-4da4f17d58aa400Rodríguez Vargas, Andrés Ignacio9ab03bcc-ab30-4928-a6c4-bb63a5816bc1500Delgado Balaguera, Sofía Margarita95fac2ea-63ad-4d7e-8591-81320e1c60c7500Pardo Villaveces, Natalia2020-06-10T17:13:38Z2020-06-10T17:13:38Z2018http://hdl.handle.net/1992/40432u808388.pdfinstname:Universidad de los Andesreponame:Repositorio Institucional Sénecarepourl:https://repositorio.uniandes.edu.co/This contribution integrates petrological and field relation constrains from the geological record of the Juanambú River Canyon and provides another important record of the Late Cretaceous to Miocene tectono-magmatic evolution of the southwestern margin of the Colombian Andes. Furthermore, the first 1:25.000 geological cartographic chart is presented within this project and it could be enhanced and used as a basis for the territorial planning, the evaluation of natural resources and the recognition of geological risks. Two intrusive bodies were recognized in the study area: First, a Late Oligocene to Early Miocene phaneritic-tonalitic rock body mainly composed by plagioclase with complex zonation, variable quantities of mafic minerals and lesser amounts of quartz. Second, a Middle to Late Miocene porphyritic intermediate to acid rock intruding the tonalitic bodies and mainly constituted by plagioclase and quartz, and in lesser amounts hydrated amphibole and biotite filling interstitial spaces. Granitoids are characterized by high contents of silica SiO_2 (66-70 wt.%), with a metaluminous to slightly peraluminous composition (ASI= 0.96-1.03). The analyzed samples exhibit a calc-alkaline character and show an intermediate to acid composition, ranging from granodiorites to granites. Tectonic classification diagrams also suggest a volcanic arc affinity related to a subduction tectonic setting. Eastward migration of the magmatic arc has been suggested for northern and central segments of the Colombian Andes, nevertheless, in the southern Juanambú Canyon region the longitudinal displacement of magmatism is not recognized. The observed spatial framework in the canyon could be related to a late migration of the magmatism over a stationed axis for southern parts of the Colombian Andes or to a subduction edge with convex center and concave extremes geometrical configuration which induced a less prominent slab dip to the southern segment represented by this regionEsta contribución integra relaciones de campo y un análisis petrológico partiendo del registro geológico del Cañón del Río Juanambú, que provee un importante ejemplo de la evolución tectono-magmática desde el Cretácico Tardío al Mioceno temprano a lo largo del margen sur occidental de los Andes colombianos. El proyecto presenta el primer mapa geológico a escala 1:25000 de la zona el cual puede ser mejorado y usado como base para el planeamiento territorial, la evaluación de recursos naturales y riesgos geológicos. Dos cuerpos de roca se diferenciaron en la zona de estudio: Primero, un cuerpo fanerítico ? tonalítico de edad Oligoceno a Mioceno, principalmente compuesto por plagioclasa con zonación compleja, cantidades variables de minerales máficos y cuarzo. Segundo, un cuerpo porfirítico de intermedio a ácido con edades de Mioceno Medio a Tardío cuya composición principal se basa en plagioclasa, cuarzo y en menor cantidad cristales de anfíbol y biotita rellenando espacios intersticiales en la roca. Los granitoides se caracterizan por un alto contenido de óxido de sílice SiO_2 (66-70 wt.%) con una composición metaluminosa a peraluminosa (ASI= 0.96-1.03). Las muestras analizadas exhiben un carácter calco-alcalino y muestran una composición intermedia a ácida, variando desde granodiorita a granito. Los diagramas de clasificación tectónica sugieren afinidad de arco volcánico asociado a un ambiente de subducción. Hacia los segmentos central y norte del área trabajada se ha sugerido una migración hacia el este del arco magmático, sin embargo, hacia el segmento sur del Cañón de Juanambú no se reconoce un desplazamiento longitudinal de intrusivos. Se sugiere por tanto que el escenario magmático observado en el cañón puede estar relacionado con una migración tardía del arco magmático a través de un eje estacionario, o a un eje de subducción con configuración convexa hacia el centro y cóncava en los extremos que induce un buzamiento menos prominente en los bordes de placaGeocientíficoPregrado32 hojasapplication/pdfengUniversidad de los AndesGeocienciasFacultad de CienciasDepartamento de Geocienciasinstname:Universidad de los Andesreponame:Repositorio Institucional SénecaTectono-magmatic analysis of the Juanambú Canyon, Southwestern Colombian AndesTrabajo de grado - Pregradoinfo:eu-repo/semantics/bachelorThesishttp://purl.org/coar/resource_type/c_7a1fhttp://purl.org/coar/version/c_970fb48d4fbd8a85Texthttp://purl.org/redcol/resource_type/TPGeologíaGeocienciasPublicationTEXTu808388.pdf.txtu808388.pdf.txtExtracted texttext/plain61544https://repositorio.uniandes.edu.co/bitstreams/01810cfc-8ed8-4dbf-aea7-c329fdb7c1ab/download0c3570315399a9135a71e1624d22c46fMD54THUMBNAILu808388.pdf.jpgu808388.pdf.jpgIM Thumbnailimage/jpeg15202https://repositorio.uniandes.edu.co/bitstreams/7b9916ee-91b1-44ae-b8d8-6b1a78c0c740/download325ea6e5c80a9d328463cd0451d3404dMD55ORIGINALu808388.pdfapplication/pdf3095437https://repositorio.uniandes.edu.co/bitstreams/b41268ec-0d8f-4320-9d5c-0af06d570d45/download56aa10e68a832298126d54539135b663MD511992/40432oai:repositorio.uniandes.edu.co:1992/404322023-10-10 18:23:26.155http://creativecommons.org/licenses/by-nc-sa/4.0/open.accesshttps://repositorio.uniandes.edu.coRepositorio institucional Sénecaadminrepositorio@uniandes.edu.co |